A 330 &amp;#x00B5;W, G&lt;inf&gt;m&lt;/inf&gt;-boosted VCO with &amp;#x2212;205 dB FoM&lt;inf&gt;T&lt;/inf&gt; and 35 % tuning range using class-b biasing

Agarwal, Pawan; Baylon, Joe; Sah, Suman P.; Majumdar, Deyasini; Heo, Deukhyoun; Schlegel, Christian

doi:10.1109/mwsym.2014.6848518

Cited by 5 publications

(1 citation statement)

References 4 publications

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“…Class-B Cross-Coupled CMOS oscillator can be utilized in the open loop structure to optimize the low phase noise and low power [178]. VCO employs Class-B biasing with optimized switching amplitudes for tail current sources to enhance phase noise performance and employs a G m -boosted structure to minimize parasitic effects within the LC tank, thereby achieving a larger tuning range [187].…”

Section: Class-b C D E F and Colpitts Lcvco 1) Class-b Lcvcomentioning

confidence: 99%

A Comparative Study of Ring VCO and LC-VCO: Design, Performance Analysis, and Future Trends

Sivaraaj,

Majeed

2023

IEEE Access

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Voltage-controlled Oscillator (VCO) is a prominent part that has been used to generate a stable frequency for the high-frequency transceiver system. This survey encompasses a comparative analysis of two commonly used VCO architectures: the Ring VCO and LC-VCO. The Ring VCO has been constructed with the collection of ring delay cells. Moreover, the LC-VCO utilizes inductors, capacitors, fine-tuning circuits, coarse-tuning circuits to generate frequency. Furthermore, this study investigates an in-depth exploration of VCO structures, operational principles, advantages, limitations, and performance metrics. In addition, it evaluates performance parameters, including operating frequency range, phase noise, figure of merit, and tuning techniques. This research suggests that based on the application and its requirements, the VCO performance parameters need to be varied. This survey employs diverse types of VCO, and its design methods. Implications for future research and study of VCO design and integration are discussed.

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Section: Class-b C D E F and Colpitts Lcvco 1) Class-b Lcvcomentioning

confidence: 99%

A Comparative Study of Ring VCO and LC-VCO: Design, Performance Analysis, and Future Trends

Sivaraaj,

Majeed

2023

IEEE Access

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A detailed study of the current‐reuse VCO's operation and a simple circuit technique to generate intrinsic‐balanced outputs

Jafari,

Sheikhaei

2024

Circuit Theory & Apps

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SummaryIn the first part of this paper, we closely examine well‐known methods for balancing the output power level of the pseudo‐differential current‐reuse voltage‐controlled oscillator. We scrutinize their effectiveness in terms of canceling output mismatches, insensitivity to process, voltage, and temperature variations, and their capability of not degrading phase noise performance. Through analyses and simulations, it is shown that contrary to common belief, some techniques are not as effective as previously thought and should be employed only under specific circumstances. The best conventional approach is proven to be the use of a common‐mode shunting capacitor at the inductor's center tap node to create a virtual ground. In the second part, it is demonstrated that the current‐reuse voltage‐controlled oscillator can intrinsically produce balanced outputs without using any additional techniques or extra passive or active components. Using single‐ended tank capacitors instead of differential ones, the common‐mode voltage of the outputs is shunted to the real ground. This technique reintroduces a reference voltage to the tank circuit, forcing the oscillator to achieve equilibrium between positive and negative swings. The proposed current‐reuse oscillator is designed and post‐layout simulated in a 65‐nm CMOS process, covering a frequency range of 4.84–6.38 GHz with an average power consumption of 0.65 mW. It produces balanced outputs with an amplitude error of less than ±0.2% and achieves a phase noise of −126.7 dBc/Hz and FoMT of 201.8 dB at a 3‐MHz offset frequency.

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2.45 GHz, 100 Mbps BPSK-DSSS transmitter for interference-robust wireless neuroprosthetic networks

Agarwal

Renaud

Baylon

et al. 2015

2015 European Microwave Conference (EuMC)

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A 330 µW, G<inf>m</inf>-boosted VCO with −205 dB FoM<inf>T</inf> and 35 % tuning range using class-b biasing

Cited by 5 publications

References 4 publications

A Comparative Study of Ring VCO and LC-VCO: Design, Performance Analysis, and Future Trends

A Comparative Study of Ring VCO and LC-VCO: Design, Performance Analysis, and Future Trends

A detailed study of the current‐reuse VCO's operation and a simple circuit technique to generate intrinsic‐balanced outputs

2.45 GHz, 100 Mbps BPSK-DSSS transmitter for interference-robust wireless neuroprosthetic networks

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