Characterization and Simulation of High Speed CMOS Operational Amplifier Using Split-length Compensation (original) (raw)
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The performance analysis of the two-stage CMOS operational amplifiers employing Miller capacitor in conjunction with the common-gate current buffer is presented. Unlike the previously reported design strategy of the opamp of this type, which results in the opamp with a lower power supply requirements, better phase margin and better speed. The Opamp is designed to exhibit a unity gain frequency of 1.46GHz and exhibits a gain of 115dB with a 117° phase margin. As compared to the conventional approach, the indirect compensation method results in a higher unity gain frequency under the same load condition. Simulation has been carried out in LT-SPICE.
A Study and Analysis of Parameters of Two Stage Single Ended CMOS Operational Amplifier
2015
As we know PMOS and NMOS technology having many drawbacks .In this having speed is very slow and circuit complexity is increased and power dissipation is very high and low noise margin. So the designers are looking for new technology. CMOS was developed in 1963 by FRANK WANLASS AND CHIN-TANG SHAN OF FAIRCHILD to overcome the drawbacks of PMOS and NMOS. CMOS has its structure similar to PMOS and NMOS but in this both PMOS and NMOS are fabricated on same chip so due to power dissipation is less and speed high. In this paper we have focused on the various parameters like Gain, Phase margin and slew rate of CMOS based two stage single ended operational amplifiers under 0.35um and 0.130um CMOS technology. Designing of high gain CMOS operational amplifier with decreasing length CMOS is a challenge for designer. All the work has been carried out on Tanner EDA V14.1 software. Circuit designing has been done on S-edit and simulation has been carried out using Tspice. Waveform has been obtained on W-edit. The simulation result for different CMOS Op Amp have been compared and analyzed. The first section contains introduction, second section contains the study of proposed circuit and its parameters, third section contains simulation and result of parameters, , and the last section presents the conclusion and references.
Designing and Performance Evaluation of two stage CMOS OP-AMP Using 45 nm CMOS Technology
2017
608 All Rights Reserved © 2017 IJARECE Abstract— This paper presents a design of two stage CMOS Operational amplifier. Operational amplifier is designed using 45nm CMOS technology. With the addition of suitable external feedback components, the modern day operational amplifier can be used for a variety of applications such as ac and dc signal amplifications, active filters, oscillators, comparators, regulators and others .In this paper we have calculated the parameters of two stage CMOS Operational amplifier like Slew rate,Gain ,Power Dissipation, and noise on different voltages and with this we have shown the effect of voltage variation on the parameters of operational amplifier. Design and Simulation has been carried on Cadence Virtuoso 6.1 tool
Analysis and Design of a Two Stage CMOS OP-AMP with 180nm using Miller Compensation Technique
With the continuous growing trend towards the reduced supply voltage and transistor channel length, designing of high performance analog integrated circuits such as operational amplifier in CMOS (complementary metal oxide semiconductor) technology becomes more critical. In this paper the two stage CMOS Operational amplifier (op-amp) has been designed using miller compensation technique which operates at 2.5V. Miller compensation technique has been employed with two approaches, first is using single miller compensation capacitor whereas second approach uses single miller compensation capacitor in series with nulling resistor. To achieve increased phase margin which indicate stability of a system, new design has been proposed with the help of second approach. The simulation was performed using TSMC 180nm CMOS process and design has been carried out in tanner EDA tool.
Design of a Two Stage CMOS Operational Amplifier using 180nm and 90nm Technology
2016
Op-amps are the most versatile and widely used component of electronic devices. Here in this work, a two stage CMOS Op-amp has been designed using both 180nm and 90nm technologies. The two stage CMOS op-amp has been designed which dissipates power as low as 0.19mW along with a propagation delay as low as 5.39ns. The circuit has a unity gain bandwidth of9.78MHz with a phase margin of 93.69°in 180nm technology while a unity gain bandwidth of 5.05MHz and phase margin of 82.89° in 90nm technology. Comparative analysis for both the 90nm and 180nm technologies has been done. Effect of scaling has also been discussed which results in gain bandwidth almost two times that before scaling. Layout has been designed for two stage CMOS op-amp in 180nm and 90nm technologies. All the work has been done using tanner EDA v14.1 tools. The schematic has been made using S-edit while the netlist was being created using T-spice and results were viewed using W-edit tool. The layout has been designed using ...
A compensation technique for two-stage CMOS operational amplifiers
Microelectronics Journal, 1987
A novel compensation technique is presented. The required compensation is achieved in a separate stage connected in parallel with the output stage. Pole/zero cancellation is used and matching requirements suggest application to system op amps where the load is a pure capacitance of known value. The technique is compared with simple capacitor (pole-splitting) compensation method. The proposed approach provides better phase margin and power supply rejection for the same power dissipation. The circuits which use both approaches to compensation were realised in 5/~m CMOS technology and the experimental results are given.
Design and Implementation of Two Stage CMOS Operational Amplifier
A method for fabricating and implementing a Two Stage CMOS Operational Amplifier using Cadence Virtuoso 180nm Technology is presented in this paper. The proposed CMOS op-amp is designed for 1.8V power supply. Op-Amp is basically a DC-coupled high-gain electronic voltage amplifier having differential input signals and, generally a single-ended output waveform. Operational amplifiers are basically utilized to perform mathematical operations such as addition, subtraction, multiplication and division in many linear, non-linear and frequency-dependent circuits. Op-amp is widely utilized as a building block in integrated circuits because of its versatile nature. Various performance parameters such as Gain, Phase Margin, Gain Bandwidth, Common Mode Rejection Ratio, Power dissipation etc have been evaluated.
Design and Analysis of a Two Stage Operational Amplifier for High Gain and High Bandwidth
Australian journal of basic and applied sciences, 2012
In this paper a design and comparison between a fully differential RC Miller compensated CMOS op-amp and conventional op-amp is presented. High gain enables the circuit to operate efficiently in a closed loop feedback system, whereas high bandwidth makes it suitable for high speed applications. A novel RC Miller compensation technique is used to optimize the parameters of gain and bandwidth for high speed applications are illustrated in this research work. The design is also able to address any fluctuation in supply or dc input voltages and stabilizes the operation by nullifying. The design is implemented on TSMC 0.18 m CMOS process at 3.3 V as supply voltage under room temperature 27 C. The simulated result shows that a unity gain bandwidth of 136.8 MHz with a high gain of 92.27 dB is achieved for the proposed op-amp circuit. The total areas of the layouts are 0.000158 mm 2 and 0.000532 mm 2 for conventional and proposed respectively.
IJERT-Design and Analysis of CMOS Two Stage OP-AMP in 180nm and 45nm Technology
International Journal of Engineering Research and Technology (IJERT), 2015
https://www.ijert.org/design-and-analysis-of-cmos-two-stage-op-amp-in-180nm-and-45nm-technology https://www.ijert.org/research/design-and-analysis-of-cmos-two-stage-op-amp-in-180nm-and-45nm-technology-IJERTV4IS051024.pdf This paper presents the buffered CMOS two stage op-amp which uses 180nm and 45nm process for design and analysis of CMOS two stage op-amp. Keeping 1.8V power supply, 20µA bias current, aspect ratio W/L, slew rate 20V/µs, input common mode ratio constant. The trade-off among various parameters such as Open loop gain, Phase margin, Gain Bandwidth Product and Power consumption are measured. It has been demonstrated that due to recent development through scaling the size of transistors decreases power dissipated through the device also decreases. This design has been carried out in Cadence design tools.