A Wide Operating Range LC Quadrature Phase VCO With Seamless Tunability

Rudrapati, Sivaramakrishna; Gupta, Shalabh

doi:10.1109/tcsii.2018.2802930

Cited by 6 publications

(4 citation statements)

References 11 publications

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“…Compared with [4], the present work achieves better PN, FOM and FOM T ; compared with Ref. [7], this design has much smaller chip area; the F SET drops by about 90.2%, which is about 10.2%, 8.1%, and 25.8% higher, respectively, than the simulation results in [6,9,10].…”

Section: Introductionmentioning

confidence: 64%

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A wide‐frequency‐range, fault‐tolerant, common‐mode‐noise‐suppressed LC‐VCO with reversed varactor technique

Guo

2021

Electronics Letters

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This letter presents a wide frequency tuning range (FTR), faulttolerant, and common-mode-noise (CMN)-suppressed LC-VCO using the Reversed-varactor (RV) technique. The RV technique maintains a wide frequency tuning range, ensures that the CMN emitted from the internal devices and external working environment is not multiplied by K VCO 2 , and improves the fault-tolerant property of the LC-VCO. The simulation results show that this technique reduces the phase noise (PN) by 6d Bc/Hz to 6.8 dBc/Hz, while the frequency fluctuation due to the single-event-transient (SET) effect decreases by about 90.2%. The proposed LC-VCO works from 14.6 GHz to 21.3 GHz, has -100.3 dBc/Hz@1 MHz at 18.2 GHz working frequency and 5.7 mW power consumption.

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Section: Introductionmentioning

confidence: 64%

“…However, a large K VCO would not only amplify the CMN coming from the VCO devices and the working environment, but also reduce the VCO's fault tolerance. For example, the K VCO of LC‐VCO proposed in [4] is around 2.7 GHz/V, which degrades the PN and FOM by ∼10 dB;…”

Section: Introductionmentioning

confidence: 99%

A wide‐frequency‐range, fault‐tolerant, common‐mode‐noise‐suppressed LC‐VCO with reversed varactor technique

Guo

2021

Electronics Letters

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“…where k is mixer gain and η is a fraction between 0 to 1. The designed circuit has two modes which can be obtained from (12). If θ 1 is equal to θ 2 , the output signal phases of VCOs will be the same.…”

Section: Dual-hybrid Coupling Pathmentioning

confidence: 99%

“…P-QVCO employs cross-coupled transistors in parallel with coupling transistors to generate four quadrature output signals under high power consumption [4][5][6][7][8][9]. Therefore, to lower the power consumption and to alleviate the phase noise, coupling transistors in S-QVCO are in series with the cross-coupled transistors [10][11][12]. However, output voltage swing of S-QVCO is limited because of the using of the series transistors.…”

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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Design of CMOS QVCO with high-Q symmetric differential inductor for wireless LAN

Lee

Park

2021

J Supercomput

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A Wide Operating Range LC Quadrature Phase VCO With Seamless Tunability

Cited by 6 publications

References 11 publications

A wide‐frequency‐range, fault‐tolerant, common‐mode‐noise‐suppressed LC‐VCO with reversed varactor technique

A wide‐frequency‐range, fault‐tolerant, common‐mode‐noise‐suppressed LC‐VCO with reversed varactor technique

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

Design of CMOS QVCO with high-Q symmetric differential inductor for wireless LAN

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