shruti suman | K L University (original) (raw)

Papers by shruti suman

Performance study of wide tuning range and low phase noise differential ring voltage control oscillators (DRVCO) for wireless communications

Journal of Physics: Conference Series

This article mostly emphasize on the study and characterization of CMOS differential ring voltage... more This article mostly emphasize on the study and characterization of CMOS differential ring voltage control oscillator (DRVCO). There are numerous DRVCO with various kinds of delay cells which are associated with the parameters like oscillation frequency, wide tuning range, power utilization & area for the applications like wireless and communications systems. These results shows less phase noise and extensive tuning range can be accomplished by the dual control voltages across the delay stages. This article helps the designers to choose the suitable DVCRO for their definite applications.

Innovative Systems Design and Engineering, 2014

Operational Ttransconductance Amplifier is very popular in analog electronics industry due to its... more Operational Ttransconductance Amplifier is very popular in analog electronics industry due to its vast applications. Analog integrated circuits have been widely used for high frequency applications. OTA has number of applications like filters, analog multipliers and analog dividers. Double gate MOSFETs (DG-MOSFETs) are strong contenders for nano scale region due its better control over short channel effects. DG-MOSFET can be used in analog circuit applications as a four-terminal device. Back gate bias can be used for better tunability. The double gate based circuits provide additional gains in terms of area, power and speed. This paper presents double gate based OTA which has high gain over a wide bandwidth. The simulation results shows gain of 9.32 dB and bandwidth is 7GHz.The simulations are done using Tanner EDA Software Tool at 90nm technology.

Investigation of Growth Management and Field Optimization on IOT-based Technology for Chilli Cultivation: Hybrid Chilli (F1 Golden Parrot) in Pallavolu, Nellore

International journal of performability engineering, 2021

Journal of Information Systems and Telecommunication (JIST), 2022

These days, heart illnesses are viewed as the essential purposes behind unforeseen passing. Along... more These days, heart illnesses are viewed as the essential purposes behind unforeseen passing. Along these lines, different clinical gadgets have been created by designers to analyze and examine different infections. Clinical consideration has gotten one of the main issues for the two individuals and government considering enthusiastic advancement in human people and clinical use. Numerous patients experience the ill effects of heart issues making some basic dangers their life, consequently they need ceaseless observing by a conventional checking framework for example, Electrocardiographic (ECG) which is the main procedure utilized in estimating the electrical movement of the heart, this method is accessible just in the emergency clinic which is exorbitant and far for distant patients. The improvement of far-off advancements enables to develop an association of related devices by methods for the web. The proposed ECG checking framework comprises of AD8382 ECG sensor to peruse patient's information, Arduino Uno, ESP8266 Wi-Fi module, and site page. The usage of the proposed ECG medical care framework empowers the specialist to screen the patient's distantly utilizing IoT http application library utilized in Arduino ide compiler to such an extent that it can send that information to website page made, on imagining the patient's ECG signal without human presence site page itself can book arrangement for that persistent, if it is anomalous. The observing cycle should be possible at whenever and anyplace without the requirement for the emergency clinic.

Design and analysis of improved performance ring VCO based on differential pair configuration

2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016

Voltage controlled oscillators (VCOs) are the most important basic building block of wired or wir... more Voltage controlled oscillators (VCOs) are the most important basic building block of wired or wireless communication systems where these are mostly used as high frequency clock generating subsystems. The main objective of this paper is to design a high frequency VCO with a good phase noise performance and low power consumption. This paper presents an improved performance CMOS voltage controlled ring oscillator which is based on single ended differential pair configuration. The performance parameters of VCO like frequency, tuning range and power dissipation are also analyzed here. The proposed single ended ring VCO is implemented using 180 nm CMOS technology and 3.5 V power supply. It provides a wide tuning range from 5.2996 GHz to 6.567 GHz at 0.5 V to 2.5 V control voltage variation with 2.921 mW to 6.806 mW power consumption. The simulation results satisfies basic concept of VCO in which oscillation frequency linearly varies with supply voltage. The implemented design has high oscillation frequency, and also consumes less area as compared to existing current starved ring VCO.

2021 International Conference on Emerging Technologies: AI, IoT and CPS for Science and Technology Applications, ICET 2021, 2021

The outbreak of the COVID-19 pandemic has brought the entire global health system to a standstill... more The outbreak of the COVID-19 pandemic has brought the entire global health system to a standstill. It is now critical to stop the virus from spreading.Wearing a mask, washing our hands frequently, and keeping social distances have all become the main focus around the world. World Health Organization (WHO) highly recommends wearing a mask covering the mouthandnoseto tackle the transmission of the novel coronavirus. In this research study, the Haar-Cascade algorithm, also known as the Voila-Jones algorithm, and OpenCV library classifiers are implemented to find whether someone is wearing a mask or not. The dataset used has 3835 images comprising of human faces with and without masks. The results show that the trained model is 98% accurate in face mask detection. This study is serviceable in real-time applications which stand in need of face mask detection, mainly in densely populated places like educational institutions, airports, and public places. ©2021 Copyright for this paper by i...

Two Stage CMOS Operational Amplifier: Analysis and Design

SSRN Electronic Journal, 2019

2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016

Objective: To study the clinico-microbiological profile of oral candidiasis in head and neck squa... more Objective: To study the clinico-microbiological profile of oral candidiasis in head and neck squamous cell cancer (HNSCC) patients undergoing curative radiotherapy (cRT). Methods: Patients undergoing cRT and developing oral candidiasis were enrolled. Clinical features such as pain and xerostomia were recorded. Candida isolates from lesions were speciated using CHROMagar (Himedia Inc.), and antifungal susceptibility was determined using microbroth dilution (MBD). Patients were followed up to study the clinical course of infection. Results: Of the 100 patients undergoing cRT, 79 developed oral candidiasis. Median duration to development of infection was 4 weeks (range: 1-6.5 weeks). Mucositis was observed in 76 (96.2%) and xerostomia in 53 (67.1%) patients; 61 patients (77.2%) had symptoms attributable to candidiasis. However, there was no correlation between severity of infection and mucositis (p=0.84) or xerostomia (p=0.51). Candida albicans was the most frequent (47 patients, 59.4%) isolate, followed by Candida tropicalis (23 patients; 29.1%). All isolates were sensitive to nystatin, but fluconazole resistance/dose-dependent susceptibility was noted in 26 (32.9%) isolates. Both Candida krusei and two of four Candida glabrata isolate exhibited fluconazole resistance. All patients received treatment for Candidiasis. On follow-up, 1 month after cRT, oral candidiasis resolved with gradual recovery of mucositis in all patients. Candida albicans was the most common cause of oral Candidiasis in HNSCC cRT, and all isolates were susceptible to nystatin in-vitro. All lesions resolved with recovery from mucositis. In addition, as no patient developed systemic candidiasis, it appears that oral candidiasis though troublesome is curable with treatment.

Innovative Systems Design and Engineering, 2014

Voltage Controlled Oscillator plays significant role in communication system design. The design o... more Voltage Controlled Oscillator plays significant role in communication system design. The design of Voltage Controlled Oscillator (VCO) with low power consumption and high frequency range is presented in this paper. The VCO is based on a single ended CMOS inverter ring oscillator . Accurate frequency of oscillation in Ring Oscillator is an important design issue. A Voltage Controlled Ring Oscillator with wide tuning range from 917.43MHz to 4189.53MHz can be achieved using bulk driven technique by varying the threshold voltage of the MOS circuits. The circuit is designed using 0.13µm CMOS process for a supply voltage of 1V. Simulation results show better accuracy compared to existing current staved ring VCO using different number of inverter stages . Keywords: Bulk driven technique, CMOS Process, Ring Oscillator, Voltage Controlled Ring Oscillator, Inverter.

2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016

In this paper we are going to design a two stage CMOS operational amplifier and to analyses its b... more In this paper we are going to design a two stage CMOS operational amplifier and to analyses its behavior by performing AC analysis using tsmc 130nm technology of mentor graphics tool. Generally Op-Amp is an electronic device that produces high gain which is required in almost all the applications. All the analog circuit fabrication processes are using Op-Amp as the basic component. Thus it is essential to make sure that op-amp must operate very effectively. So we try to increase the gain of op-amp by using two stages with CMOS realization. Here CMOS is used since it provides less power dissipation and requires only 5V as input for biasing. We are modifying the existed design by placing a current source in place of biasing circuit and operating all the components in saturation region only. Thus, we are accomplishing the function of biasing circuit with a current mirror circuit. Also, the area used to fabricate the circuit is also less as we are reducing the number of MOS transistors used to design the circuit. Hence this two stage Op-Amp produces high Gain, Phase Margin. The simulation results are provided by using mentor graphics tool showing the graphs of gain, phase margin and the slew rate.

Design of charge pump PLL using improved performance ring VCO

2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016

In this paper a PLL is designed at 0.18 μm CMOS technology and 3 V supply voltage. For performing... more In this paper a PLL is designed at 0.18 μm CMOS technology and 3 V supply voltage. For performing phase and frequency synchronization the charge pump PLL utilizes four basic blocks which are phase detector, VCO, charge pump and first order low pass filter. An improved performance differential pair configuration based ring VCO has very high oscillation frequency up to 6.567 GHz at 2.5 V control voltage and power consumption of 6.8 mW. The phase frequency detector (PFD) is another part of PLL which is designed using CMOS realization of D-Flip Flop and NOR gate. The designed PLL has a power consumption of approximately 36 mW at the operating frequency of 500 MHz.

2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016

Objective: To study the clinico-microbiological profile of oral candidiasis in head and neck squa... more Objective: To study the clinico-microbiological profile of oral candidiasis in head and neck squamous cell cancer (HNSCC) patients undergoing curative radiotherapy (cRT). Methods: Patients undergoing cRT and developing oral candidiasis were enrolled. Clinical features such as pain and xerostomia were recorded. Candida isolates from lesions were speciated using CHROMagar (Himedia Inc.), and antifungal susceptibility was determined using microbroth dilution (MBD). Patients were followed up to study the clinical course of infection. Results: Of the 100 patients undergoing cRT, 79 developed oral candidiasis. Median duration to development of infection was 4 weeks (range: 1-6.5 weeks). Mucositis was observed in 76 (96.2%) and xerostomia in 53 (67.1%) patients; 61 patients (77.2%) had symptoms attributable to candidiasis. However, there was no correlation between severity of infection and mucositis (p=0.84) or xerostomia (p=0.51). Candida albicans was the most frequent (47 patients, 59.4%) isolate, followed by Candida tropicalis (23 patients; 29.1%). All isolates were sensitive to nystatin, but fluconazole resistance/dose-dependent susceptibility was noted in 26 (32.9%) isolates. Both Candida krusei and two of four Candida glabrata isolate exhibited fluconazole resistance. All patients received treatment for Candidiasis. On follow-up, 1 month after cRT, oral candidiasis resolved with gradual recovery of mucositis in all patients. Conclusion: Candida albicans was the most common cause of oral Candidiasis in HNSCC cRT, and all isolates were susceptible to nystatin in-vitro. All lesions resolved with recovery from mucositis. In addition, as no patient developed systemic candidiasis, it appears that oral candidiasis though troublesome is curable with treatment.

Design of improved performance differential voltage controlled ring oscillator

2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016

Voltage controlled ring oscillators (VCROs) are the fundamental module in the field of wireless c... more Voltage controlled ring oscillators (VCROs) are the fundamental module in the field of wireless communication systems. It is basically an amplifier with the positive feedback loop in which frequency is the linear function of voltage. To fulfill low power requirement with less noise perturbation in high speed clock recovery circuits, differential voltage controlled ring oscillator (DVCRO) plays vital role. The proposed circuit is designed in differential topology for even number of stages using active load in cross coupled configuration. By minimizing the amount of noise current during high to low and low to high signal transition noise performance is improved. The frequency of oscillation can be achieved by controlling gate-source voltage of control transistors. The major attributes are the linearity, stability and wide tuning range which make system design more efficient and highly attractive. The circuit is implemented using 250 nm, 180 nm and 90 nm CMOS technologies at the supply voltage of 1V and control voltage ranges from 0.01 V to 0.08 V. The circuit operates at 38.9408 GHz frequency at power consumption of 0.02341 mW with optimized phase noise performance of -150.9768 dBm/Hz which is obtained best at 90nm technology.

Performance Analysis of Voltage Controlled Ring Oscillators

Advances in Intelligent Systems and Computing, 2016

The voltage controlled ring oscillator (VCO) is a critical and necessary component in data commun... more The voltage controlled ring oscillator (VCO) is a critical and necessary component in data communication systems and clock recovery circuits. It is basically an oscillator, whose output frequency is controlled by the input control voltage. Finally, it has been concluded that the selected VCOs have large varying characteristics. This paper comprehensively analyzes different ring VCOs and their performances have been summarized in terms of frequency range, power consumption and bandwidth, which enable the designers to select the most appropriate ring VCO for specific applications.

Design of Improved Performance Voltage Controlled Ring Oscillator

2015 Fifth International Conference on Advanced Computing & Communication Technologies, 2015

ABSTRACT Voltage Controlled Oscillator is one of the most important basic building block for anal... more ABSTRACT Voltage Controlled Oscillator is one of the most important basic building block for analog, digital as well as in mixed signal circuits. This paper presents a new technique to improve the performance of ring oscillator. The VCO is based on single ended ring oscillator. The circuit is designed using 0.13 m μ CMOS technology with supply voltage of 3.3 V. A VCO with high frequency range from 2.26GHz to 3.50 GHz is achieved by using this technique. Simulation results reveal the better performance of the proposed design as compared to existing current staved ring VCO in terms of oscillation frequency and power consumption.

Analysis and design of current starved ring VCO

2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016

This paper focuses on and analysis and design of current starved voltage controlled ring oscillat... more This paper focuses on and analysis and design of current starved voltage controlled ring oscillator. The analysis includes effect of delay time, phase noise, layout area, technology etc. on the frequency of oscillation at various power supplies and control voltages. The simulation results shows that the circuit has higher tuning range and low power consumption suitable for various application domains. Added benefit of this VCO is to maintain a constant amplitude level and oscillation. It is also proved here that the frequency of oscillation is inverse of the supply voltage and therefore consuming less power.

Design of Second Order Low Pass and High Pass Filter using Double Gate MOSFET based OTA

OTA-C filters are one of the most widely used as continuous time filters. It is because they are ... more OTA-C filters are one of the most widely used as continuous time filters. It is because they are fast active integrators, provides low-power operation and tuning of the filter characteristics at higher frequencies. At high frequencies, the OP AMP based active filters has limited performance. We cannot change the values of resistors and inductors but OTA-C filter provides ability to change their values by changing the transconductance of OTA. Second order low and high pass filter structures have widespread applications. The double gate MOSFETs show better performance in the nanometer range of operation. Because it has better control over short channel effects (SCE’s) and other scaling related problems like gate leakage, sub-threshold conduction. Double gate MOSFET is four terminal device and back gate can be used for biasing which can tune the characteristics of circuit. This will provide additional advantage of low power and reduced area. This paper presents second order low pass an...

With the technology trend moving towards smaller geometries and improved circuit performances are... more With the technology trend moving towards smaller geometries and improved circuit performances are expected to replace the traditional bulk devices. Accurate current mirroring is a critical analog design requirement in many applications. Current mirror is an essential component in analog design for biasing and constant current generation. This paper presents the nano scale double gate MOSFET based efficient current mirror and cascode current mirror designs implemented at 22 nm technology. They have wide bandwidth, wide tuning range and operate at 1V power supply. The proposed double gate based current mirrors are better than conventional MOSFET based current mirrors. It shows how the nanoscale double gate MOSFETs can pave way for efficient, tolerant and smaller circuits with tuneable characteristics.

International Journal of Scientific & Technology Research, 2012

This paper presents the ring oscillator based temperature sensor. The method is highly area effic... more This paper presents the ring oscillator based temperature sensor. The method is highly area efficient, simple and easy for IC implementation as compared to traditional temper ature sensors. The proposed temperature sensor was fabricated using 0.35 μm technology, which occupies extremely small silicon area. It exploits the frequency of the ring oscillator that is proportional to temperature, which is displayed in the form of a digital output. The proposed temperature sensor comprises a ring oscillator, a voltage level shifter, a 10-bit counter, and a 10-bit register. The designed ring oscillator is frequency-tunable and the voltage level shifter provides the output to full-scale to make sure that the number of its rising edge is counted by the counter. The register saves the counted output.

Design of Efficient Ring VCO using Nano Scale Double Gate MOSFET

In this paper a voltage controlled oscillator (VCO) using MOSFET (Metal Oxide Semiconductor Field... more In this paper a voltage controlled oscillator (VCO) using MOSFET (Metal Oxide Semiconductor Field Effect Transistor) and Double Gate (DG) MOSFET are compared and analyzed. The comparison has been done on the basis of different parameters: voltage swing, tuning range, power consumption, number of stages and phase noise. Two architectures namely current starved ring VCO and inverter based oscillator are implemented using DG MOSFET. The results of simulation indicated that implementation using DG MOSFET, gives very high tuning range as compared to MOSFET based VCO. The Tuning range in current starved VCO using DG MOSFET is found out to be 16 GHz to 22 GHz compared to MOSFET which is only 3 GHz to 5 GHz. The phase noise performance of DG MOSFET based VCO is also better than MOSFET based VCO for low frequency domain.

Performance study of wide tuning range and low phase noise differential ring voltage control oscillators (DRVCO) for wireless communications

Journal of Physics: Conference Series

Innovative Systems Design and Engineering, 2014

Investigation of Growth Management and Field Optimization on IOT-based Technology for Chilli Cultivation: Hybrid Chilli (F1 Golden Parrot) in Pallavolu, Nellore

International journal of performability engineering, 2021

Journal of Information Systems and Telecommunication (JIST), 2022

Design and analysis of improved performance ring VCO based on differential pair configuration

2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016

2021 International Conference on Emerging Technologies: AI, IoT and CPS for Science and Technology Applications, ICET 2021, 2021

Two Stage CMOS Operational Amplifier: Analysis and Design

SSRN Electronic Journal, 2019

2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016

Innovative Systems Design and Engineering, 2014

2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016

Design of charge pump PLL using improved performance ring VCO

2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016

Objective: To study the clinico-microbiological profile of oral candidiasis in head and neck squa... more Objective: To study the clinico-microbiological profile of oral candidiasis in head and neck squamous cell cancer (HNSCC) patients undergoing curative radiotherapy (cRT). Methods: Patients undergoing cRT and developing oral candidiasis were enrolled. Clinical features such as pain and xerostomia were recorded. Candida isolates from lesions were speciated using CHROMagar (Himedia Inc.), and antifungal susceptibility was determined using microbroth dilution (MBD). Patients were followed up to study the clinical course of infection. Results: Of the 100 patients undergoing cRT, 79 developed oral candidiasis. Median duration to development of infection was 4 weeks (range: 1-6.5 weeks). Mucositis was observed in 76 (96.2%) and xerostomia in 53 (67.1%) patients; 61 patients (77.2%) had symptoms attributable to candidiasis. However, there was no correlation between severity of infection and mucositis (p=0.84) or xerostomia (p=0.51). Candida albicans was the most frequent (47 patients, 59.4%) isolate, followed by Candida tropicalis (23 patients; 29.1%). All isolates were sensitive to nystatin, but fluconazole resistance/dose-dependent susceptibility was noted in 26 (32.9%) isolates. Both Candida krusei and two of four Candida glabrata isolate exhibited fluconazole resistance. All patients received treatment for Candidiasis. On follow-up, 1 month after cRT, oral candidiasis resolved with gradual recovery of mucositis in all patients. Conclusion: Candida albicans was the most common cause of oral Candidiasis in HNSCC cRT, and all isolates were susceptible to nystatin in-vitro. All lesions resolved with recovery from mucositis. In addition, as no patient developed systemic candidiasis, it appears that oral candidiasis though troublesome is curable with treatment.

Design of improved performance differential voltage controlled ring oscillator

2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016

Performance Analysis of Voltage Controlled Ring Oscillators

Advances in Intelligent Systems and Computing, 2016

Design of Improved Performance Voltage Controlled Ring Oscillator

2015 Fifth International Conference on Advanced Computing & Communication Technologies, 2015

Analysis and design of current starved ring VCO

2016 International Conference on Electrical, Electronics, and Optimization Techniques (ICEEOT), 2016

Design of Second Order Low Pass and High Pass Filter using Double Gate MOSFET based OTA

International Journal of Scientific & Technology Research, 2012

Design of Efficient Ring VCO using Nano Scale Double Gate MOSFET

— Phase Locked Loop (PLL) is basic building block of several communication systems to achieve syn... more — Phase Locked Loop (PLL) is basic building block of several communication systems to achieve synchronization. In this paper the PLL is designed using improved performance ring VCO with 0.18 μm CMOS technology and supply voltage of 3 V. The proposed ring VCO which has higher tuning range is used for implementation of PLL in order of GHz frequency range. The phase frequency detector (PFD) is another part of PLL which is designed using multiplexer which gives more accurate results. The low pass filter which is connected with charge pump is designed using switched capacitor technique in which resistor is replaced by transistors and capacitor by which the overall area of the circuit is reduced. The designed PLL has a power consumption of approximately 28 mW at the operating frequency of 2.5 GHz.

—This paper focuses on and analysis and design of current starved voltage controlled ring oscilla... more —This paper focuses on and analysis and design of current starved voltage controlled ring oscillator. The analysis includes effect of delay time, phase noise, layout area, technology etc. on the frequency of oscillation at various power supplies and control voltages. The simulation results shows that the circuit has higher tuning range and low power consumption suitable for various application domains. Added benefit of this VCO is to maintain a constant amplitude level and oscillation. It is also proved here that the frequency of oscillation is inverse of the supply voltage and therefore consuming less power.

Voltage Controlled Oscillator is one of the most important basic building block for analog, digit... more Voltage Controlled Oscillator is one of the most
important basic building block for analog, digital as well as in
mixed signal circuits. This paper presents a new technique to
improve the performance of ring oscillator. The VCO is based on single ended ring oscillator. The circuit is designed using
0.13 μm CMOS technology with supply voltage of 3.3 V. A VCO
with high frequency range from 2.26GHz to 3.50 GHz is achieved
by using this technique. Simulation results reveal the better
performance of the proposed design as compared to existing
current staved ring VCO in terms of oscillation frequency and
power consumption.

Operational transconductance amplifier is very popular in analog electronics industry due its lar... more Operational transconductance amplifier is very popular in analog electronics industry due its large number of applications. OTAs are used in filter designing, analog multipliers, analog dividers and other applications. Analog integrated circuits have been widely used for high frequency applications. At high frequencies, they are deemed to replace OPAMPs. Double gate MOSFETs are strong contenders for nano scale region due its better control over short channel effects. The double gate based circuits provide additional gain in terms of area, power and speed along with better tunable functionality. This paper deals with the design of low power, wide bandwidth OTA using double gate MOSFETs at 90 nm technology.