SiGe Bipolar VCO With Ultra-Wide Tuning Range at 80 GHz Center Frequency

Pohl, Nils; Rein, H.-M.; Musch, Thomas; Aufinger, Klaus; Hausner, J.

doi:10.1109/jssc.2009.2026822

Cited by 83 publications

(48 citation statements)

References 16 publications

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“…Inductors L e are placed in the emitter branch of the circuit to implement the LC filtering technique to reduce the phase noise contribution of the current source [10]. Q [5][6][7][8][9] and R [1][2][3][4][5][6] constitute the bias network of the circuit. The transistor size was chosen to be W=0.12 µm and L=18 µm (the width was fixed for the process and the length was the largest available in the process), as Phase noise simulations were then performed to obtain the optimal value of the design parameter n that gives the lowest phase noise.…”

Section: Circuit Designmentioning

confidence: 99%

Phase noise analysis for a mm‐wave VCO configuration

George¹,

Sinha²

2012

Micro & Optical Tech Letters

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Abstract-The letter highlights the importance of modelling the phase noise of an oscillator using the impulse sensitivity function. A Colpitts oscillator in the common collector configuration is analyzed to obtain an expression for its phase noise. The oscillator design is thus optimized for phase noise with respect to process and design parameters. The fabricated voltage controlled oscillator at an oscillating frequency of 52.8 GHz has a measured phase noise of -98.9 dBc/Hz at 1 MHz offset.

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Section: Circuit Designmentioning

confidence: 99%

Phase noise analysis for a mm‐wave VCO configuration

George¹,

Sinha²

2012

Micro & Optical Tech Letters

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“…Varactors are part of many RF integrated circuits, such as voltage controlled oscillators [1][2][3][4], whose resonance frequency diminishes with the varactor capacitance, C, as 1= ffiffiffiffiffi ffi LC p , where L stands for the LC tank inductance. Precise physical models for PN junction capacitances have been reported [5][6][7][8][9][10][11][12][13], but not for the junction parasitic resistances and, consequently, neither for the PN varactor quality factor.…”

Section: Introductionmentioning

confidence: 99%

N-well resistance modelling in Q-factor of doughnut-shaped PN varactors

Marrero-Martín¹,

González²,

Garcı́a³

et al. 2015

Solid-State Electronics

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“…Several published approaches for wide-tuning-range single VCOs [3]- [12] suffer from large DC-power dissipation ( ) or large phase noise. These drawbacks are mainly ascribed to the low quality factor of on-chip varactors at several-dozen gigahertz (because the quality factor is inversely proportional to frequency).…”

Section: Introductionmentioning

confidence: 99%

“…These drawbacks are mainly ascribed to the low quality factor of on-chip varactors at several-dozen gigahertz (because the quality factor is inversely proportional to frequency). A SiGe-HBT VCO [3] using differentially tuned varactors achieved a wide-tuning range with low phase noise, but it needed large and wide control-voltage range. A CMOS VCO [5] using digitally controlled differential varactors exhibited wide-tuning range with small , but its phase noise was not enough for 60-GHz communication systems using QPSK or higher-phase modulation.…”

Section: Introductionmentioning

confidence: 99%

A Push-Push VCO With 13.9-GHz Wide Tuning Range Using Loop-Ground Transmission Line for Full-Band 60-GHz Transceiver

Nakamura

Masuda

Washio

et al. 2012

IEEE J. Solid-State Circuits

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A 59-GHz push-push voltage-controlled oscillator (VCO)-based on 0.18-m SiGe BiCMOS technology-for a full-band 60-GHz transceiver was developed. The VCO uses a loop-ground transmission line (LG-TML) composed of signal lines (half wavelength at fundamental frequency) and secondary lines (quarter wavelength at second harmonic frequency). The LG-TML makes it possible to output both a large signal at second harmonic frequency and an adequate signal at the fundamental frequency for driving a prescalar, while it prevents the Miller effect of the HBTs in the VCO from increasing and negative conductance from being reduced. As a result, the VCO achieves high output power of +1.5 dBm, while maintaining wide tuning range of 13.9 GHz (26% of the center oscillation frequency). Moreover, it exhibits a low phase noise of -108 dBc/Hz at a 1-MHz offset frequency and achieves a state-of-the-art figure of merit (FOM ) of -189.6 dB. Index Terms-IEEE 802.15.3c, loop-ground transmission line, millimeter-wave communication, push-push VCO, SiGe BiCMOS, VCO.

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SiGe Bipolar VCO With Ultra-Wide Tuning Range at 80 GHz Center Frequency

Cited by 83 publications

References 16 publications

Phase noise analysis for a mm‐wave VCO configuration

Phase noise analysis for a mm‐wave VCO configuration

N-well resistance modelling in Q-factor of doughnut-shaped PN varactors

A Push-Push VCO With 13.9-GHz Wide Tuning Range Using Loop-Ground Transmission Line for Full-Band 60-GHz Transceiver

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