High Q-VCO with low phase noise for communications applications (original) (raw)

A 2.3GHz LC-tank CMOS VCO with optimal phase noise performance

2006 IEEE International Solid State Circuits Conference - Digest of Technical Papers, 2006

 Users may download and print one copy of any publication from the public portal for the purpose of private study or research.  You may not further distribute the material or use it for any profit-making activity or commercial gain  You may freely distribute the URL identifying the publication in the public portal If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.

Design of a 2.2-4.0 GHz Low Phase Noise and Low Power LC VCO

This paper reports a design of an integrated Voltage Controlled Oscillator (LC-VCO) with high oscillation frequency, Low power consumption and Low Phase noise. For obtaining the performance parameters, the design was simulated in 0.18µm CMOS technology. Results of the present deign shows that the oscillation frequency of VCO is 2.2GHz to 4.0 GHz; the power consumption of the VCO at oscillation frequency of 2.2GHz is 16.13 mw and phase noise-143 mdb/HZ. In addition at 3.3 GHz and 4.0 GHz is 15.76 mW and 15.31mW with phase noise -151 mdb/Hz and -207mdb/Hz respectively. We have compared the results of the present design with earlier published work and is presented in table 1.

Low-phase-noise LC quadrature VCO using coupled tank resonators in a ring structure

IEEE Journal of Solid-State Circuits, 2001

The concept of coupled resonators is employed in a ring VCO structure to reduce the phase noise. This architecture allows the design of low-phase-noise voltage controlled oscillators (VCOs) using integrated low-inductors. Quadrature differential outputs are also realized in this design. Two monolithic LC tanks are coupled together to implement a transimpedance resonator with an effective close to twice that of a single tank. In addition, the coupled tank's transimpedance resonator provides 90 phase shift. Four such stages are cascaded in a ring structure to provide I-Q differential outputs, and to further reduce the phase noise. A prototype of the VCO is built in a 0.35-m CMOS technology. The measured phase noise is 122 dBc/Hz at 600-kHz offset from 1.93 GHz. The VCO draws 9.2 mA from a 3-V supply, and occupies a chip area of 1.1 1.1 mm 2 .

Power Efficient Implementation of Low Noise CMOS LC VCO using 32nm Technology for RF Applications

International Journal of Emerging Research in Management and Technology

Voltage Controlled Oscillator (VCO) is an integral component of most of the receivers such as GSM, GPS etc. As name indicates, oscillation is controlled by varying the voltage at the capacitor of LC tank. By varying the voltage, VCO can generate variable frequency of oscillation. Different VCO Parameters are contrasted on the basis of phase noise, tuning range, power consumption and FOM. Out of these phase noise is dependent on quality factor, power consumption, oscillation frequency and current. So, design of LC VCO at low power, low phase noise can be obtained with low bias current at low voltage. Nanosize transistors are also contributes towards low phase noise. This paper demonstrates the design of low phase noise LC VCO with 4.89 GHz tuning range from 7.33-11.22 GHz with center frequency at 7 GHz. The design uses 32nm technology with tuning voltage of 0-1.2 V. A very effective Phase noise of -114 dBc / Hz is obtained with FOM of -181 dBc/Hz. The proposed work has been compared...

A Low Power Low Phase Noise LC Voltage-Controlled Oscillator

Progress In Electromagnetics Research Letters, 2013

A low phase noise CMOS complementary cross-coupled LC-tank voltage-controlled oscillator (VCO), implemented with TSMC 0.18 µm 1P6M CMOS technology, is presented. Double pair pseudoresistance transistors biased by the tapped center of the inductor are utilized to reduce the DC bias current. The circuit consumes 1.55 mA from a 1.5 V supply voltage which saves up to 52.4% power, compared with the conventional one. Furthermore, an adaptive body biasing technique (ABB) is used to overcome the effect of PVT variations. The VCO is tunable from 2.58 to 3.07 GHz and has a phase noise −122.7 dBc/Hz at 1 MHz offset from the 3 GHz carrier. The Figure of Merit (FOM) of the proposed VCO is −188.8 dBc, and the figure of merit including the tuning range (FOM T ) is −193.5 dBc.

Ultra-Low Power, Low Phase Noise 10 GHz LC VCO in the Subthreshold Regime

Circuits and Systems, 2013

A new design for an ultra-low power, low phase noise differential 10 GHz LC voltage-controlled oscillator (VCO) which is biased in the subthreshold regime, is presented in the 0.18 µm CMOS process, for the first time. The designed circuit topology is an NMOS only cross-coupled LC-tank VCO which has an extra symmetric centre tapped inductor between the source ends of the cross-coupled transistors. Using this inductor leads to an improvement of the phase noise of VCO about 3.5 dB. At the supply voltage of 0.46 V, the output phase noise is −107.8 dBc/Hz at 1 MHz offset frequency from the carrier frequency of 10.53 GHz, so that the dc power consumption is only 0.346 mW. Tuning range is between 10.53 GHz to 11.35 GHz which is 7.5% and the figure of merit is −193.8 dB, which shows that this is the first VCO design in the subthreshold regime at this frequency. This VCO can be used for multi-standard wireless LAN communication protocols 802.11a/b/g easily by a frequency division of 2 or 4 respectively.

Design and performance analysis of low phase noise LC-voltage controlled oscillator

TELKOMNIKA, 2023

Voltage controlled oscillator (VCO) offers the radio frequency (RF) system designer a freedom to select the required frequency. Today's wireless communication system imposes a very stringent requirement in terms of phase noise generated in VCO. This study presents an inductive source degeneration technique to improve the phase noise performance of the inductance-capacitance (LC)-VCO. Double cross-coupled topology has been chosen for the proposed VCO. The post layout simulations with the parasitic resistance, inductance, capacitance (RLC) extracted view is carried out with united microelectronics corporations (UMC) 0.18 µm process by spectre simulator of cadence tools. The proposed VCO provides a phase noise of-124.3 dBc/Hz @ 1 MHz. The tuning range obtained is 19.87% with a centre frequency of 2.46 GHz which makes it suitable for industrial, scientific, and medical (ISM) band applications. It consumes a power of 2.10 mW. Also, a good figure of merit of-189 is achieved. The total layout area occupied is 477×545 µm 2 .

A CMOS 3.3-8.4 GHz wide tuning range, low phase noise LC VCO

2009

A novel inductor switching technique is used to design and implement a wideband LC voltage controlled oscillator (VCO) in 0.13µm CMOS. The VCO has a tuning range of 87.2% between 3.3 and 8.4 GHz with phase noise ranging from −122 to −117.2 dBc/Hz at 1MHz offset. The power varies between 6.5 and 15.4 mW over the tuning range. This results in a Power-Frequency-Tuning Normalized figure of merit (PFTN) between 6.6 and 10.2 dB which is one of the best reported to date.