A Very Low Power Quadrature VCO with Modified Current-Reuse and Back-Gate Coupling Topology

2017 ◽  
Vol 26 (11) ◽  
pp. 1750184 ◽  
Author(s):  
Qiuzhen Wan ◽  
Jun Dong ◽  
Hui Zhou ◽  
Fei Yu
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Phase Noise ◽  
Tuning Range ◽  
Supply Voltage ◽  
Voltage Controlled Oscillator ◽  
Back Gate ◽  
Current Reuse ◽  
Quadrature Vco ◽  
In Series

In this paper, a very low power modified current-reused quadrature voltage-controlled oscillator (QVCO) is proposed with the back-gate coupling technique for the quadrature signal generation. By stacking switching transistors in series like a cascode, the modified current-reused QVCO can be constructed in a totem-pole manner to reuse the dc biasing current and lower the power consumption. By utilizing the back-gates of switching transistors as coupling terminals to achieve the quadrature outputs, the back-gate coupled QVCO improves the phase noise and reduces the power consumption compared to the conventional coupling transistor based topology. Together with the modified current-reuse and back-gate coupling techniques, the proposed QVCO can operate at reduced supply voltage and power consumption while maintaining remarkable circuit performance in terms of low phase noise and wide tuning range. With a dc power of 1.6[Formula: see text]mW under a 0.8[Formula: see text]V supply voltage, the simulation results show the tuning range of the QVCO is from 2.36 to 3.04[Formula: see text]GHz as the tuning voltage is varied from 0.8 to 0.0[Formula: see text]V. The phase noise is [Formula: see text]118.3[Formula: see text]dBc/Hz at 1[Formula: see text]MHz offset frequency from the carrier frequency of 2.36[Formula: see text]GHz and the corresponding figure-of-merit of the QVCO is [Formula: see text]183.7[Formula: see text]dBc/Hz.

scholarly journals An Ultra-Low-Power K-Band 22.2 GHz-to-26.9 GHz Current-Reuse VCO Using Dynamic Back-Gate-Biasing Technique

Electronics ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 889
Author(s):  
Xiaoying Deng ◽  
Peiqi Tan
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Tuning Range ◽  
Frequency Tuning ◽  
Cmos Process ◽  
Voltage Controlled Oscillator ◽  
Back Gate ◽  
Ultra Low Power ◽  
Current Reuse ◽  
K Band

An ultra-low-power K-band LC-VCO (voltage-controlled oscillator) with a wide tuning range is proposed in this paper. Based on the current-reuse topology, a dynamic back-gate-biasing technique is utilized to reduce power consumption and increase tuning range. With this technique, small dimension cross-coupled pairs are allowed, reducing parasitic capacitors and power consumption. Implemented in SMIC 55 nm 1P7M CMOS process, the proposed VCO achieves a frequency tuning range of 19.1% from 22.2 GHz to 26.9 GHz, consuming only 1.9 mW–2.1 mW from 1.2 V supply and occupying a core area of 0.043 mm2. The phase noise ranges from −107.1 dBC/HZ to −101.9 dBc/Hz at 1 MHz offset over the whole tuning range, while the total harmonic distortion (THD) and output power achieve −40.6 dB and −2.9 dBm, respectively.

scholarly journals A LOW PHASE NOISE, POWER EFFICIENT VOLTAGE CONTROLLED OSCILLATOR USING 0.18-μM CMOS TECHNOLOGY

2014 ◽  
pp. 256-259
Author(s):  
AJIT SAMASGIKAR
Keyword(s):  
Power Consumption ◽  
Phase Noise ◽  
Tuning Range ◽  
Supply Voltage ◽  
Cmos Technology ◽  
Noise Power ◽  
Voltage Controlled Oscillator ◽  
Power Efficient ◽  
Sustained Oscillations ◽  
Low Phase Noise

A low phase noise, power efficient VCO using UMC 0.18μm CMOS technology has been proposed in this paper. The proposed VCO has a tuning range of 9.71GHz to 9.9GHz, with a phase noise of -79.88 dBc/Hz @ 600kHz offset. The Vtune ranging between 1V - 1.5V generates sustained oscillations. The maximum power consumption of the VCO is 11.9mW using a supply voltage of 1.8V with ±10% variation.

A Low Power CMOS-Based VCO Design with I-MOS Varactor Tuning Control

2018 ◽  
Vol 27 (10) ◽  
pp. 1850160 ◽  
Author(s):  
Manoj Kumar ◽  
Dileep Dwivedi
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Supply Voltage ◽  
Voltage Controlled Oscillator ◽  
Power Supply Voltage ◽  
Back Gate ◽  
Tuning Method ◽  
Low Power Cmos ◽  
Improved Performance ◽  
Mos Varactor

This paper presents a new design of low power voltage controlled oscillator (VCO) circuit using three transistors NOR-gate and I-MOS (inversion mode) varactor tuning method. Variation in the oscillation frequency has been obtained by varying the output load capacitance with the use of I-MOS varactor tuning consisting of two PMOS transistors connected in parallel. Variable capacitance across the I-MOS varactor has been achieved by varying the source/drain voltage ([Formula: see text] and back-gate voltage ([Formula: see text]. Variation of [Formula: see text] from 1[Formula: see text]V to 2[Formula: see text]V provides the frequency deviation from 1.970[Formula: see text]GHz to 1.379[Formula: see text]GHz with I-MOS width of 8 [Formula: see text]m at power supply voltage ([Formula: see text] of 1.8[Formula: see text]V. Power consumption of the circuit is 1.296[Formula: see text]mW with [Formula: see text] of 1.8[Formula: see text]V. The results have been obtained for different I-MOS varactor widths like 5[Formula: see text][Formula: see text]m, 8[Formula: see text][Formula: see text]m and 10[Formula: see text][Formula: see text]m. Further, variations in the frequency have been obtained from 0.650 GHz to 2.584 GHz with the Vdd variation from 1[Formula: see text]V to 3[Formula: see text]V. In addition, by variations of [Formula: see text] from 0[Formula: see text]V to 1.8[Formula: see text]V and [Formula: see text] from 1[Formula: see text]V to 3[Formula: see text]V, the proposed oscillators operate in the frequency range from 0.556[Formula: see text]GHz to 2.584[Formula: see text]GHz for 8[Formula: see text][Formula: see text]m width of I-MOS varactor. Proposed VCO circuit show a phase noise of [Formula: see text][Formula: see text]dBc/Hz at 1[Formula: see text]MHz offset from the carrier frequency and the figure of merit (FoM) for the VCO is 154.51[Formula: see text]dB/Hz. Proposed VCO shows an improved performance in terms of power consumption, output frequency and FoM.

Design of 5 GHz low-power CMOS LC VCO based on complementary cross-coupled topology with modified tail current-shaping technique

2014 ◽  
Vol 6 (6) ◽  
pp. 573-580 ◽  
Author(s):  
Meng-Ting Hsu ◽  
Po-Hung Chen ◽  
Yao-Yen Lee
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Phase Noise ◽  
Supply Voltage ◽  
Voltage Controlled Oscillator ◽  
Measurement Results ◽  
Low Power Cmos ◽  
5 Ghz ◽  
Low Phase Noise ◽  
Manufacture Company

In this paper, a low-power CMOS LC voltage-controlled oscillator (VCO) with body-biasing and low-phase noise with Q-enhancement techniques is presented. A self-body biased circuit is introduced that can reduce power consumption. Some derivations of the Q-enhancement and how to improve the phase noise of the circuit are also discussed. This chip is implemented by the Taiwan Semiconductor Manufacture Company 0.18 µm 1P6M process. The measurement results exhibit a tuning range of 14.7% from 4.92 to 5.7 GHz at a supply voltage of 1.4 V. The power consumption of the core circuit and figure of merit are 2.5 mW and −188.6 dBc/Hz. The phase noise is −118 dBc/Hz@1 MHz at an operation frequency of 4.94 GHz.

A NOVEL WIDEBAND CMOS VCO USING SWITCH CAPACITORS ARRAY FOR RF APPLICATIONS

2012 ◽  
Vol 21 (05) ◽  
pp. 1250046
Author(s):  
MOHAMMAD NIABOLI-GUILANI ◽  
MAHROKH MAGHSOODI ◽  
ALIREZA SABERKARI ◽  
REZA MESHKIN
Keyword(s):  
Low Power ◽  
Phase Noise ◽  
Tuning Range ◽  
High Efficiency ◽  
Supply Voltage ◽  
Cmos Process ◽  
Voltage Controlled Oscillator ◽  
Voltage Variation ◽  
Low Power Dissipation ◽  
Tuning Frequency

This paper presents a novel low power consumption, low phase noise, and high tuning range CMOS cross-coupled voltage-controlled oscillator (VCO). Using common mode double-pseudo-resistance technique in the proposed circuit leads to low power dissipation without degrading the phase noise. Additionally, band-switching capacitor array is employed in order to increase the tuning range. The schematic circuit of the proposed VCO is simulated in 0.18 μm 1P6M CMOS process and simulation results show high efficiency of the proposed circuit. The overall tuning frequency range is from 1.7 GHz to 3.18 GHz (59%) with tuning voltage variation range from 0 V to 1.5 V. The proposed VCO circuit has phase noise of -102.6 and -124.3 dBc/Hz at 100 KHz and 1 MHz offset frequency from the carrier, respectively, while consumes 1.98 mW power at 1.5 V supply voltage.

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

2018 ◽  
Vol 6 (8) ◽  
pp. 53
Author(s):  
Shitesh Tiwari ◽  
Sumant Katiyal ◽  
Parag Parandkar
Keyword(s):  
Power Consumption ◽  
Phase Noise ◽  
Tuning Range ◽  
Low Voltage ◽  
Performance Comparison ◽  
Low Noise ◽  
Center Frequency ◽  
Voltage Controlled Oscillator ◽  
Low Phase Noise ◽  
Lc Vco

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 with five peer LC VCO designs working at higher feature sizes and outcome of this performance comparison dictates that the proposed work working at better 32 nm technology outperformed amongst others in terms of achieving low Tuning voltage and moderate FoM, overshadowed by a little expense of power dissipation. 

Ground-Adjustable Inductor for Wide-Tuning VCO Design

2012 ◽  
Vol 256-259 ◽  
pp. 2373-2378
Author(s):  
Wu Shiung Feng ◽  
Chin I Yeh ◽  
Ho Hsin Li ◽  
Cheng Ming Tsao
Keyword(s):  
Power Consumption ◽  
Tuning Range ◽  
Supply Voltage ◽  
Wide Band ◽  
Ultra Wide Band ◽  
Cmos Process ◽  
Voltage Controlled Oscillator ◽  
Wide Tuning Range ◽  
Chip Area ◽  
Ground Plate

A wide-tuning range voltage-controlled oscillator (VCO) with adjustable ground-plate inductor for ultra-wide band (UWB) application is presented in this paper. The VCO was implemented by standard 90nm CMOS process at 1.2V supply voltage and power consumption of 6mW. The tuning range from 13.3 GHz to 15.6 GHz with phase noise between -99.98 and -115dBc/Hz@1MHz is obtained. The output power is around -8.7 to -9.6dBm and chip area of 0.77x0.62mm2.

scholarly journals A Bandwidth-Enhanced Differential LC-Voltage Controlled Oscillator (LC-VCO) and Superharmonic Coupled Quadrature VCO for K-Band Applications

Electronics ◽  
2018 ◽  
Vol 7 (8) ◽  
pp. 127 ◽  
Author(s):  
Farman Ullah ◽  
Yu Liu ◽  
Zhiqiang Li ◽  
Xiaosong Wang ◽  
Muhammad Sarfraz ◽  
...  
Keyword(s):  
Phase Noise ◽  
High Performance ◽  
Tuning Range ◽  
Voltage Controlled Oscillator ◽  
Sige Bicmos ◽  
Quadrature Vco ◽  
Free Running ◽  
A New Technique ◽  
Offset Frequency ◽  
Lc Vco

A novel varactor circuit exhibiting a wider tuning range and a new technique for quadrature coupling of LC-Voltage Controlled Oscillator (LC-VCO) is presented and validated on a 25 GHz oscillator. The proposed varactor circuit employs distribute-biased parallel varactors with a series inductor connected at both ends of the varactor bank to extend the tuning range of the oscillator. Similarly, the quadrature coupling is accomplished by employing the 2nd harmonic, explicitly generated in the stand-alone free-running differential oscillator using frequency doubler. As an example, the Differential VCO (DVCO) is tunable between 20 GHz and 31 GHz and exhibits the best Phase Noise (PN) of −100 dBc/Hz at 1 MHz offset frequency. Similarly, the Quadrature VCO (QVCO) covers 42% tuning bandwidth around 25 GHz oscillation frequency, which is significantly wider than other state-of-the-art VCOs at comparable frequencies. In addition, all the oscillators are designed in class-C to further improve their performances both in term of low power and low phase noise. The presented oscillators are designed using high-performance SiGe HBTs of the GlobalFoundries (GFs) 130 nm SiGe BiCMOS 8HP process. The presented DVCO and QVCO draw currents of approximately 10 mA and 21 mA, respectively from a 1.2 V supply.

Low Phase Noise Voltage Controlled Oscillator Using Cascode and Current-Reuse Techniques for Radio Frequency Circuits

2013 ◽  
Vol 479-480 ◽  
pp. 513-516
Author(s):  
Shuo Chang Hsu ◽  
Meng Ting Hsu ◽  
Yu Tuan Hsu
Keyword(s):  
Phase Noise ◽  
Power Dissipation ◽  
Supply Voltage ◽  
Building Blocks ◽  
Voltage Controlled Oscillator ◽  
Ieee 802.11A ◽  
Current Reuse ◽  
Chip Fabrication ◽  
Offset Frequency ◽  
Low Phase Noise

The voltage-controlled-oscillator (VCO) is one of the most important building blocks in the system. The chip fabrication of VCO is made by TSMC 0.18μm 1P6M CMOS standard process. The chip presents a low power and low phase noise for IEEE 802.11a applications, the PMOS casecode and current-reuse cross-couple technology are designed to improve phase noise and reduce power. The measured results of phase noise is-120.87 dBc/Hz at 1MHz offset frequency from the carrier frequency 5.05 GHz, and operates frequency from 5.04 GHz to 5.895 GHz with a tuning range of 17.14%. Under supply voltage 1.65V, the core power dissipation is 4.05 mW.

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