A Wideband Low Power VCO for IEEE 802.11a

Anchlia, Ankur; Sharma, Dinesh K.

doi:10.1109/icsict.2006.306285

Cited by 4 publications

(1 citation statement)

References 1 publication

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“…The measured value of FOM from equation (2) and (3) is about -181.3 dB and -173 dB respectively. The comparison with some reported papers [3,5,[9][10][11][12] based on the same LC type with or without switched capacitance structure and related technology is also listed in Table I …”

Section: B Tail Current Considerationmentioning

confidence: 99%

Design of Low Phase Noise with Wide-band VCO Using Source Capacitive Degeneration

Hsu

Liu

Wun

2007

2007 Asia-Pacific Microwave Conference

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This paper presents a completely integrated low phase noise and wide tuning range CMOS LC voltage controlled oscillator with a source capacitive degeneration and large accumulation-mode varactors(AMOS) for a wide-band receiver front-end by a TSMC 0.18-pm 1P6M CMOS process. AMOS varactors are used to maintain a large tuning range. However, the capacitors connect to source of cross-couple pairs to further reduce the parasitic capacitance and increase VCO tuning capability. The VCO consumes l1mA from 1.2V supply and operates with a wide-band from 3.69 -5.75 GHz. The measured phase noise is less than -113.6 dBc /Hz at lMHz offset within the entire tuning range.

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Section: B Tail Current Considerationmentioning

confidence: 99%

Design of Low Phase Noise with Wide-band VCO Using Source Capacitive Degeneration

Hsu

Liu

Wun

2007

2007 Asia-Pacific Microwave Conference

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The 5.8‐GHz fully integrated low‐power low‐phase‐noise CMOS LC VCOs using RC noise‐filtering technique

Lee

Chen

Lin

2008

Micro & Optical Tech Letters

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In this work, two 5.8‐GHz fully integrated LC differential voltage‐controlled oscillators (VCOs) using standard 0.18 μm CMOS technology were implemented. One of them adopted a standard differential inductor (STD VCO). The other (PPGS VCO) comprised the same layout except that PPGS (poly‐silicon partial pattern‐ground‐shields) was added beneath its differential inductor for Q‐factor enhancement. Low‐power consumption was achieved by maximizing the equivalent parallel resistance (RP) of the LC tank by layout optimization. In addition, low‐phase noise was achieved mainly by adding two parallel capacitors to the cross‐coupled transistors and a resistor (Rfilter) to the biasing transistor for suppressing the noise coming from the current source. The STD VCO achieved a wide‐tuning‐range of 10.3% (from 5.26 GHz to 5.802 GHz) with a low‐power dissipation of 3.02 mW. The measured phase noise was −118.25 dBc/Hz at 1‐MHz offset. The corresponding figure‐of‐merit (FOM) was −188.72 dBc/Hz, better than those of the reported state‐of‐the‐art CMOS LC VCOs in 5‐GHz‐band. The chip area was only 508 × 595 μm2 excluding the test pads. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 2907–29117, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23859

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Design of high performance and wide-band VCO with transformer feedback

Hsu

2008

2008 Asia-Pacific Microwave Conference

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A Wideband Low Power VCO for IEEE 802.11a

Cited by 4 publications

References 1 publication

Design of Low Phase Noise with Wide-band VCO Using Source Capacitive Degeneration

Design of Low Phase Noise with Wide-band VCO Using Source Capacitive Degeneration

The 5.8‐GHz fully integrated low‐power low‐phase‐noise CMOS LC VCOs using RC noise‐filtering technique

Design of high performance and wide-band VCO with transformer feedback

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