A 18.2-29.3 GHz Colpitts VCOs bank with -119.5 dBc/Hz Phase Noise at 1 MHz Offset for 5G Communications

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

doi:10.1109/rfic.2019.8701813

Cited by 14 publications

(6 citation statements)

References 8 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%

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%

New 20 GHz push–push common‐collector Colpitts VCO

Huang

Dai

et al. 2020

IET Microwaves, Antennas & Propagation

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“…8,9 For the wideband mm-wave frequency synthesizers, Figure 1 shows various implementation architectures. [10][11][12][13] The most commonly used frequency synthesizer based on fundamental VCO (voltage controlled oscillator) is depicted in Figure 1A. 10 However, the phase noise of CMOS (complementary metal oxide semiconductor) fundamental oscillator is usually limited due to the low-quality factor of varactors at mm-wave.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, a feasible scheme is to use a wideband VCO array cascaded with a wideband frequency multiplier to generate an ultra-wideband mm-wave local oscillator (LO) signal, as illustrated in Figure 1C. 12,13 Compared with the other two ways, this scheme has lower phase noise and power consumption. However, it is difficult to design an ultra-wideband frequency multiplier which can meet mm-wave multiband 5G communication systems.…”

Section: Introductionmentioning

confidence: 99%

“…The transceivers with such a wide bandwidth have strict requirements on the frequency synthesizer, which must have excellent phase noise performance 8,9 . For the wideband mm‐wave frequency synthesizers, Figure 1 shows various implementation architectures 10–13 . The most commonly used frequency synthesizer based on fundamental VCO (voltage controlled oscillator) is depicted in Figure 1A 10 .…”

Section: Introductionmentioning

confidence: 99%

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A 22.7‐ to 44.2‐GHz Darlington dual‐injection injection‐locked frequency tripler with >35dBc harmonic rejection for multiband 5G communication systems

Wang²,

Qian

et al. 2021

Circuit Theory & Apps

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This paper presents an ultra-wideband varactor-less injection-locked frequency tripler (ILFT) based on Darlington dual-injection topology targeting millimeter-wave multiband fifth generation (5G) communication systems. By utilizing the proposed Darlington dual-injection injector, the current injection efficiency is improved; thus, the locking range is extended significantly without introducing the varactors. In addition, the Darlington dual-injection topology enhances the harmonic rejection performance by suppressing undesired harmonics. Implemented in 65-nm CMOS (Complementary Metal Oxide Semiconductor) technology, the proposed ILFT can operate from 22.7 to 44.2 GHz and consumes 6.2 mA at 1.2 V supply voltage. The harmonics rejection is more than 35 dBc and occupies 0.17 mm 2 .

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“…As a power-hungry component in RF transceiver, voltage-controlled oscillators (VCOs) often contribute a large power dissipation of these portable wireless systems. Colpitts VCOs are widely applied in wireless communication systems because of their simple structures and good phase noise performance [11][12][13][14]. Because the noise and linearity performances of bipolar devices are always better than MOS devices, bipolar Colpitts VCOs attract more attention in the analog signal direct-transmission, such as radio microphones, wireless instruments and so on.…”

Section: Introductionmentioning

confidence: 99%

A low-power high-output-efficiency bipolar Colpitts VCO using base inductive feedback and Q-factor enhancement for analog signal acquisition

Huang

Jiang

Yang

et al. 2020

IEICE Electron. Express

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A low-power Colpitts VCO with high output efficiency that uses base inductive feedback and Q-factor enhancement techniques is proposed in this paper. The base inductive feedback technique employs an inductor at the base of the bipolar transistor to generate a feedback enhancement effect and reduce the start-up current. The Q-factor enhancement technique adopts a capacitor voltage divider at the output of the Colpitts VCO to improve the DC-to-RF efficiency. The mechanisms are theoretically analyzed, and then a 433 MHz Colpitts VCO is designed to verify the scheme. Its DC consumption is as low as 270 µW while the operating frequency is 433 MHz. Finally, the Colpitts VCO is applied in a wireless neural signal recording system and works well. Thus, the presented VCO is suitable for analog signal acquisition system in the extremely power-constrained wireless scenarios. key words: Colpitts VCO, Inductive feedback, Q-factor enhancement, DCto-RF efficiency, Low power Classification: Devices, circuits and hardware for IoT and biomedical applications

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A 18.2-29.3 GHz Colpitts VCOs bank with -119.5 dBc/Hz Phase Noise at 1 MHz Offset for 5G Communications

Cited by 14 publications

References 8 publications

New 20 GHz push–push common‐collector Colpitts VCO

New 20 GHz push–push common‐collector Colpitts VCO

A 22.7‐ to 44.2‐GHz Darlington dual‐injection injection‐locked frequency tripler with >35dBc harmonic rejection for multiband 5G communication systems

A low-power high-output-efficiency bipolar Colpitts VCO using base inductive feedback and Q-factor enhancement for analog signal acquisition

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