A Back-Gate Coupling Quadrature Voltage-Control Oscillator Embedded With Self Body-Bias Schema

Wu, Janne-Wha; Wu, Han-Hsin; Hsu, Kai‐Cheng; Chen, Changchun

doi:10.1109/lmwc.2013.2242325

Cited by 24 publications

(7 citation statements)

References 9 publications

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“…The phasor diagram of the injection capacitor currents into Vx are considered in Figure 4. In this figure, I Cgs is the drain current because of gate-source capacitance current, I Cgd is the drain current because of gate-drain capacitance current and I ib is the drain current because of tail bias current calculated in (8) and (9). The parasitic capacitor currents inject into a series transistor and multiply in the square wave with a frequency of ω.…”

Section: Calculation Of Phase and Amplitude Error In The Sc-qomentioning

confidence: 99%

“…Because of their low phase noise, LC QOs are more popular than the other approaches . The first method in LC QOs is the parallel coupled quadrature oscillator (PC‐QO) proposed by A. Rofougaran .…”

Section: Introductionmentioning

confidence: 99%

“…The first method in LC QOs is the parallel coupled quadrature oscillator (PC‐QO) proposed by A. Rofougaran . A controllable output phase and amplitude using adjusting tail currents is an effective characteristic of PC‐QOs as having the coupling transistors in parallel with the switching transistors degrades the phase noise and increases the power dissipation . Source injected QOs (SC‐QOs) are the other LC QO that have a lower phase noise compared with PC‐QOs.…”

Section: Introductionmentioning

confidence: 99%

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A series‐coupled LC quadrature oscillator using phase/amplitude calibration

Ghonoodi

Naimi

2016

Circuit Theory & Apps

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Summary In this paper, an analytic approach for the estimation of the phase and amplitude error in series coupled LC quadrature oscillator (SC‐QO) is proposed. The analysis results show that imbalances in source voltage of coupling transistor because of mismatches between LC tanks are the main source of the phase and amplitude error in this oscillator. For compensation of the phase and amplitude error, a phase and amplitude‐tunable series coupled quadrature oscillator is designed in this paper. A phase shift generation circuit, designed using an added coupling transistor, can control the coupling transistor source voltage. The phase and amplitude error can simply be controlled and removed by tuning the phase shifter, while this correction does not have undesirable impact on phase noise. In fact, the proposed SC‐QO generates a phase shift in the output current, which reduces the resonator phase shift (RPS) and improves phase noise. The phase and amplitude tunable SC‐QO is able to correct the phase error up to ±12°, while amplitude imbalances are reduced as well. To evaluate the proposed analysis, a 4.5‐GHz CMOS SC‐QO is simulated using the practical 0.18‐μm TSMC CMOS technology with a current consumption of 2 mA at 1.8‐V supply voltage. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Calculation Of Phase and Amplitude Error In The Sc-qomentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A series‐coupled LC quadrature oscillator using phase/amplitude calibration

Ghonoodi

Naimi

2016

Circuit Theory & Apps

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“…The performances of QAM transceivers are mainly affected by quadrature voltage-controlled oscillators (QVCOs) in local oscillators. Thus, it is desirable to design a QVCO that exhibits low phase noise and a large output swing with low power consumption for QAM transceivers [2].…”

Section: Introductionmentioning

confidence: 99%

K‐band low‐power dual‐hybrid‐coupling quadrature voltage‐controlled oscillator

Weng

Huang

Chiang

2019

IET Microwaves, Antennas & Propagation

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A low‐power and low phase noise quadrature voltage‐controlled oscillator (QVCO) is presented for short range radar systems here. A dual‐hybrid coupling (DHC) technique is adopted to increase the output voltage swing. The second harmonic filters are applied to eliminate the phase noise as well as to suppress the phase error. The proposed DHC‐QVCO was implemented with a low cost standard 0.18 μm complementary metal‐oxide‐semiconductor (CMOS) process technology. The oscillation frequency is operated between 19.8 and 21.5 GHz. The tuning range is 8.5%. The phase noise achieves −100.1 dBc/Hz at 1 MHz offset from a carrier frequency of 20.6 GHz. The phase error and gain error are 4.29° and 3.2 dBm, respectively. The core circuit consumes only 5.15 mW from a power supply of 1.5 V. The designed DHC‐QVCO has demonstrated the advantages of low‐power, low phase noise, and wide tuning range for K‐band applications.

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“…Therefore, [57]. In [69] and [70], the tank signal is coupled through the back-gates of the core transistors using non-conventional CMOS technology.…”

Section: Quadrature Vcomentioning

confidence: 99%

Design and analysis of amplitude and phase tunable VCO for ISM band application

Zhang¹

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Oscillators are an integral part of many electronic systems. With rapid development in the area of Radio Frequency (RF) and wireless communication, the interest in oscillator which generates Local Oscillator (LO) signal has grown rapidly in the last few years. The LO signal is required to down-convert the RF signal to a lower Intermediate Frequency (IF) signal, or vice versa. For typical RF application, LC Voltage-Controlled Oscillator (VCO) is used. It is essential to tune the VCO for an optimized performance due to two reasons. Firstly, the phase noise of the VCO has great effect on the selectivity of the receiver. Secondly, VCO is one of the most power hungry blocks of the transceiver. Hence the power consumption of the transceiver can be reduced significantly by optimizing that of the VCO. Moreover, for transceivers that implement quadrature modulation/demodulation scheme, the phase error and amplitude error of the LO signal can affect the function of the overall performance significantly. With the development and popularity of Wireless Local Area Network (WLAN) and Personal Area Networks (PANs) which operates in the Industrial, Scientific and Medical (ISM) band, it is essential to design VCO with optimized performance for ISM band application. In this thesis, the aim is to explore the VCO's tuning method, both differential and quadrature, to optimize the overall performance. Firstly, a fully integrated hybrid type Automatic Amplitude Calibration (AAC) VCO has been designed and fabricated in 0.18 µm CMOS technology. The operation of the whole loop and the state-dependent nature is analyzed followed by the analysis of important blocks. Based on these analyses, a quantitative transient analysis Abstract II for the whole loop is performed. A systematic design procedure is proposed according to the relationship explored in the quantitative transient analysis. Secondly, in order to satisfy the need for quadratuer signal generation with good phase noise and phase error performance, a novel in-phase coupling scheme is proposed. The principle of this in-phase coupling scheme is analyzed first, followed by the analysis for possible sources of phase error. Based on this analysis, two novel schemes for phase error tuning are proposed.

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A Back-Gate Coupling Quadrature Voltage-Control Oscillator Embedded With Self Body-Bias Schema

Cited by 24 publications

References 9 publications

A series‐coupled LC quadrature oscillator using phase/amplitude calibration

A series‐coupled LC quadrature oscillator using phase/amplitude calibration

K‐band low‐power dual‐hybrid‐coupling quadrature voltage‐controlled oscillator

Design and analysis of amplitude and phase tunable VCO for ISM band application

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