Analysis and design of a new low‐phase noise and Gm‐enhanced class‐C quadrature VCO

Majd, Yasaman; Ebrahimi, Ebrahim

doi:10.1049/iet-map.2020.0029

Cited by 9 publications

(4 citation statements)

References 24 publications

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“…This work aims to achieve a sinusoidal output with a maximum RMS value (VRMS) of 177 mV and peak-topeak voltage (Vpk-pk) of 500 mV. This signal is large enough to be used with a high-gain transmit (TX) amplifier for applications in Frequency Modulation (FM) or aircraft communications [22], which is the intended frequency band of operation. Since it will be an unmodulated signal, it can also function as a carrier frequency in FM.…”

Section: Fig 1 Vco Architectures Showing Differences In Output Couplingmentioning

confidence: 99%

Design of an Active-Loaded Differential Voltage-Controlled Oscillator (VCO) Using Double-Gate MOSFET

Pillay,

M. Srivastava

2023

IJETT

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A differential cross-coupled Voltage Controlled Oscillator (VCO) has been designed using the Double-Gate (DG) MOSFET for VHF applications. The DG MOSFET exhibits superior noise immunity with its high noise figure and is suitable for low-power, high-frequency applications. The proposed VCO has been designed using a differential topology with improved power consumption, design flexibility, and noise reduction. This also improves the high-frequency performance of existing differential amplifiers. Thereafter, the proposed VCO was compared with fabrication and design methods, particularly Silicon-based CMOS and Single-Gate (SG) MOSFET VCOs, as possible alternatives. Various printed circuit board (PCB) design practices were followed to minimise the noise and improve the overall efficiency of the circuitry. Key parameters for the analysis of this VCO are the output power, phase noise, and figure of merit, which have been realised as -2.91 dBm at peak and -69.79 dBc/Hz at 1 MHz, respectively. The power consumption of the designed VCO is 36 mW.

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Section: Fig 1 Vco Architectures Showing Differences In Output Couplingmentioning

confidence: 99%

Design of an Active-Loaded Differential Voltage-Controlled Oscillator (VCO) Using Double-Gate MOSFET

Pillay,

M. Srivastava

2023

IJETT

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“…1 Many techniques have been adopted in LC-VCO to improve its phase noise performance. [2][3][4][5][6] In addition, linearity is another key performance specification of VCO. Both phased-locked loops (PLL), [7][8][9][10] and frequency modulated continuouswave (FMCW), [11][12][13][14][15] require high linearity VCOs since gain variations of VCOs directly affect the loop dynamics of the PLL as well as the accuracy of the FMCW.…”

Section: Introductionmentioning

confidence: 99%

“…With the advent of the Big Data era, communication systems have put forward higher requirements for LC voltage‐controlled oscillators (VCOs) 1 . Many techniques have been adopted in LC‐VCO to improve its phase noise performance 2–6 . In addition, linearity is another key performance specification of VCO.…”

Section: Introductionmentioning

confidence: 99%

A high‐linearity LC‐VCO with combined MOS varactors and bulk‐biased PMOS varactors for gain variation compensation

Wang,

He,

Tang

et al. 2024

Micro & Optical Tech Letters

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A high‐linearity LC‐voltage‐controlled oscillator (LC‐VCO) with combined metal‐oxide semiconductor varactors and bulk‐biased P‐channel metal‐oxide semiconductor varactors in parallel is proposed to reduce the VCO‐gain (KVCO) variation and extend the linear range of the control voltage. Fabricated in a 180‐nm complementary metal‐oxide semiconductor process, the proposed topology achieves a low gain variation of less than 6.3% and a tuning range of ~28% operating from 2.31 to 3.06 GHz, corresponding to a linear control voltage range from 0.6 to 1.4 V. The phase noise is measured to be −115.3 dBc/Hz at 1 MHz offset at 3.06 GHz and the figure of merit (FoM) is −181.2 dBc/Hz. The oscillator occupies an area of 0.93 × 0.54 mm and consumes 1.8 mW from mixed 1.2/1.8 V supply voltage.

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“…And feedback capacitors, which can increase the oscillation signal swing, are proposed. Moreover, a switched biasing technique is proposed for reducing the conduction time of the tail current sources 3,4 . The proposed noise filtering, feedback capacitors, and switched biasing technique can reduce PN under low P D .…”

Section: Introductionmentioning

confidence: 99%

A low‐power voltage‐controlled oscillator with phase noise suppressing techniques

Hsieh,

Shao

2023

Micro & Optical Tech Letters

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A 0.5‐V low‐power VCO by using TSMC 0.18‐μm CMOS process has been proposed. For achieving low phase noise and low power consumption, several techniques have been utilized. The forward body biasing technique can lower the supply voltage and power consumption. The noise filtering, feedback capacitors, and switched biasing technique can reduce the phase noise and power consumption. The PMOS transistors, which has lower flicker noise than the NMOS transistors, are used for further lowering the phase noise. The body‐controlled cross‐coupled pair is proposed for choosing the oscillation frequencies without using additional varactors, which lower the oscillation signal loss and phase noise. The measured results show the phase noise at 1 MHz offset frequency from the carrier signal is −118.6 dBc/Hz with 1/f3 corner frequency of 230 kHz while the control voltage is 0 V. The frequency tuning range is from 2.4 to 2.46 GHz under power consumption from 0.5 to 0.8 mW. The figure of merit at 1 MHz offset frequency from the carrier signal is −189 dBc/Hz.

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Analysis and design of a new low‐phase noise and Gm‐enhanced class‐C quadrature VCO

Cited by 9 publications

References 24 publications

Design of an Active-Loaded Differential Voltage-Controlled Oscillator (VCO) Using Double-Gate MOSFET

Design of an Active-Loaded Differential Voltage-Controlled Oscillator (VCO) Using Double-Gate MOSFET

A high‐linearity LC‐VCO with combined MOS varactors and bulk‐biased PMOS varactors for gain variation compensation

A low‐power voltage‐controlled oscillator with phase noise suppressing techniques

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