A quad-core 15GHz BiCMOS VCO with −124dBc/Hz phase noise at 1MHz offset, −189dBc/Hz FOM, and robust to multimode concurrent oscillations

Padovan, Fabio; Quadrelli, Fabio; Bassi, Matteo; Tiebout, M.; Bevilacqua, Andrea

doi:10.1109/isscc.2018.8310341

Cited by 59 publications

(13 citation statements)

References 4 publications

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“…The FOM and FOM T of the proposed VCO are around −177.92 and −178.2, respectively. Table 1 shows the performance comparison of the proposed VCO and the published state-of-the-art VCOs [9][10][11][12][13][14][15][16][17][18][19]. Due to high-power consumption, the calculated FOM of this design could not stand out when comparing with those published state-of-the-art designs.…”

Section: Measurement Resultsmentioning

confidence: 99%

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New 20 GHz push–push common‐collector Colpitts VCO

Huang

Dai

et al. 2020

IET Microwaves, Antennas & Propagation

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A wide‐band push–push common‐collector Colpitts voltage‐controlled oscillator (VCO) usingimpedance peaking network and gain enhancing technique is proposed in this work.The impedance peaking network is introduced to increase the coupling factor ofthe differential inductor in the inductorcapacitor (LC) tank without sacrificing the quality factor. The impedancepeaking technique could guarantee the push–push VCO unconditionally oscillatingin a differential mode without degrading the phase noise performance. The gainenhancing technique employs an LC resonator in series with the emitterdegeneration resistor in the common‐collector amplifier in the VCO core toimprove the VCO oscillating amplitude and then improve the phase noiseperformance. The proposed VCO oscillates at around 20 GHz with >10.5%frequency tuning range from 18.9 to 21.4 GHz across temperature from −40 to125°C. The measured phase noise is lower than −107 dBc/Hz at 1 MHz offset acrossthe entire working temperature (−40 125°C). The whole VCO dissipates 45 mA under3.3 V power supply, and the typical figure of merit is around −177.92.

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Section: Measurement Resultsmentioning

confidence: 99%

“…to the figure of merit (FOM) and the figure of merit including FTR (FOM T ) defined as[9][10][11][12][13][14][15][16] …”

mentioning

confidence: 99%

New 20 GHz push–push common‐collector Colpitts VCO

Huang

Dai

et al. 2020

IET Microwaves, Antennas & Propagation

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“…The measured power consumption is 5.5 mW with a supply voltage of 0.9 V. Measured results are summarized and compared with the relevant state-ofthe-art oscillators in Table I. Quad-core coupled oscillator [20] shows the lowest phase noise at a lower frequency. However, it costs around 13 times power consumption comparing to this work.…”

Section: Implementation and Measurement Of Dual-mode Waveform-shmentioning

confidence: 99%

A Cascaded Mode-Switching Sub-Sampling PLL With Quadrature Dual-Mode Voltage Waveform-Shaping Oscillator

Shu

Qian

Luo

2021

IEEE Trans. Circuits Syst. I

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A cascaded mode-switching sub-sampling PLL with quadrature dual-mode voltage waveform-shaping oscillator is proposed in this paper. The dual-mode voltage waveform-shaping oscillator is introduced to extend the tuning range and improve phase noise performance at mm-wave frequency, simultaneously. Meanwhile, the dual-mode quadrature topology is investigated to reduce the phase noise and quadrature phase error, compared to conventional quadrature oscillator. Then, the proposed oscillator is applied in a cascaded PLL with divider-less mode-switching sub-sampling loop, which can obtain the merits of high frequency-resolution, low loop noise, and wide frequency locking range. Both the dual-mode voltage waveform-shaping oscillator and the cascaded PLL are verified and fabricated in a 28-nm CMOS process. The FoM and FoM T of the oscillator at 10 MHz offset are −188.2 dBc/Hz and −200.7 dBc/Hz respectively. The proposed PLL prototype exhibits a frequency range from 22.8 to 33.9 GHz with a typical power consumption of 41.7 mW. The phase noise across the frequency band is from −104.1 to −108.2 dBc/Hz at 1 MHz offset. The jitter FoM j is −236.2 dB.

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“…State-of-the-art (SoA) microwave oscillators are based on on-chip LC [1], microstrip [2], active [3], and dielectric resonators (DR) [4]. On-chip LC tanks are compact but lossy, hence offering a low-cost but low-performance solution.…”

Section: Introductionmentioning

confidence: 99%

“…The standalone oscillator achieves a measured phase noise of -113 dBc/Hz at 100 kHz offset from an 8.6 GHz output while consuming 10.2 mW of dc power. Hence, surpassing the SoA X-band EM oscillators [1]- [4], RF-MEMS oscillators above 5 GHz [15], [20]- [23], and X-band PLLs [24]- [27]. The oscillator-divider chain is characterized by a phase noise of -147 dBc/Hz at 1 MHz offset from a 1075 MHz output while consuming 12 mW of dc power.…”

Section: Introductionmentioning

confidence: 99%