A Low Phase-Noise 9-GHz CMOS Quadrature-VCO using Novel Source-Follower Coupling Technique

Chen, Hsien‐Ku; Chang, Der–Chen; Juang, Ying‐Zong; Lu, Shey‐Shi

doi:10.1109/mwsym.2007.380093

Cited by 13 publications

(11 citation statements)

References 9 publications

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“…The total tuning range was measured to be $510 MHz. Table 1 shows a comparison of the performance of the CR-QVCO in this work with those of the QVCOs (in 0.18 lm CMOS technology) in some other recent papers [6,8,9]. The performance of the proposed CR-QVCO is quite remarkable in terms of power consumption, FOM, and PFTN-factor (defined in [10]).…”

Section: Measurement Resultsmentioning

confidence: 86%

“…In the capacitive loaded EBG microstrip structure under study, the characteristics of the parameters in the passband and the stopband, such as the propagation constant, characteristic impedance, A-and B-parameters, are the same as the periodic CPWs with inductive loading as reported in [9]. The dispersion relation and the analysis in this section show the grating nature of the EBG structure.…”

mentioning

confidence: 89%

“…The dispersion relation and the analysis in this section show the grating nature of the EBG structure. The propagation constants of the EBG microstrip structure in the passband and those of the periodically loaded CPW [9] have different trends versus frequency. The EBG microstrip structure has the maxima of b c at both edges of the stopband, whereas the CPW structure has the maximum value only at the lower edge of the stopband (Figs.…”

mentioning

confidence: 99%

“…The EBG microstrip structure has the maxima of b c at both edges of the stopband, whereas the CPW structure has the maximum value only at the lower edge of the stopband (Figs. 3(a) and 4(a) in [9]). …”

mentioning

confidence: 99%

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Low‐voltage/low‐power 7‐GHZ transformer‐coupled current‐reused CMOS QVCO with wide tuning range

Tseng

Huang

2010

Micro & Optical Tech Letters

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Section: Measurement Resultsmentioning

confidence: 86%

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confidence: 89%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Low‐voltage/low‐power 7‐GHZ transformer‐coupled current‐reused CMOS QVCO with wide tuning range

Tseng

Huang

2010

Micro & Optical Tech Letters

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“…6, where the varactor diodes and inductor form a LC-tank resonator. The mechanism of the parallel cross-coupled pairs forces two differential outputs to be 90 degrees out of phase [17]. The output buffer of the QVCO is a source-follower stage and provides a differential voltage amplitude of 840 mV peak-to-peak with a 3-dB bandwidth of 24 GHz at a current consumption of 2.4 mA.…”

Section: B Quadrature Voltage-controlled Oscillator (Qvco)mentioning

confidence: 99%

A 90 nm CMOS Broadband Multi-Mode Mixed-Signal Demodulator for 60 GHz Radios

Chuang

Yeh

Barale

et al. 2010

IEEE Trans. Microwave Theory Techn.

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In this paper, a low-power high-speed fully integrated mixed-signal quadrature demodulator with an embedded multi-gigabit modem in 90 nm CMOS technology is presented. A wide dynamic-range automatic gain control (AGC) is implemented to avoid clipping distortion experienced by the baseband ADCs. By reusing the power detector circuit within the AGC, analog signal processor is introduced to recover OOK modulated signals up to 2.5 Gb/s for an additional power consumption of 7.5 mW. Integrated with ultra-low-power, 3 mW, 3 GS/s, 3-bit ADCs and high-speed digital modem, the system requires neither external synchronization controls nor processing to demodulate BPSK modulated signals up to 3.5 Gb/s and DBPSK modulated signals up to 1.3 Gb/s. The baseband modem incorporates a mixed-signal, timing-recovery loop to sample the symbols at the optimum SNR based on a high-speed Gardner timing-error detector for an additional power consumption of 14 mW. The analog front-end consists of IQ mixers, a 13 GHz QVCO, frequency synthesizers, and a baseband AGC for an overall power consumption of 52 mW. The entire receiver chip occupies an area of 1.275 1.19 mm 2 . To the best of authors' knowledge, this demonstrates the maximum throughput at the minimum power budget and highest level integration among all published wireless multi-gigabit, multi-mode, mixed-signal CMOS receivers.

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An Nmos Cross‐Coupled Quadrature Vco using Coupling Common‐Gate Pmosfets

Jang

Lin

Hsue

2013

Micro & Optical Tech Letters

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This letter presents a fully integrated cross‐coupled quadrature voltage‐controlled oscillator (QVCO) using common‐gate transistor instead of common‐source transistor as a coupling device. The prototype wide‐tuning X‐band QVCO in 0.18‐μm CMOS process is proposed to generate four output phases and consists of two n‐core cross‐coupled VCOs and four pMOS coupling devices. The proposed QVCO oscillates from 8.52 to 10.56 GHz and the power consumption is 9.76 mW at 0.8 V supply voltage. The measured phase noise is −118.88 dBc/Hz at 1‐MHz offset frequency from the carrier frequency 9.86 GHz. The QVCO occupies a chip area of 0.623 × 1.197 mm2 and provides a figure of merit of −188.86 dBc/Hz. The figure of merit including tuning range, FOMT, of this QVCO is −195.30 dBc/Hz. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1705–1708, 2013

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A Low Phase-Noise 9-GHz CMOS Quadrature-VCO using Novel Source-Follower Coupling Technique

Cited by 13 publications

References 9 publications

Low‐voltage/low‐power 7‐GHZ transformer‐coupled current‐reused CMOS QVCO with wide tuning range

Low‐voltage/low‐power 7‐GHZ transformer‐coupled current‐reused CMOS QVCO with wide tuning range

A 90 nm CMOS Broadband Multi-Mode Mixed-Signal Demodulator for 60 GHz Radios

An Nmos Cross‐Coupled Quadrature Vco using Coupling Common‐Gate Pmosfets

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