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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/37849

Title: An 11GHz Low-Phase-Noise Voltage-Controlled Oscillator
Authors: Mei‐Ling Yeh
Yao‐Chian Lin
Wei‐Chieh Chang
Contributors: 國立臺灣海洋大學:電機工程學系
Keywords: Cross‐coupled
Semiconductors
Oscillators
Phase (electric)
Noise
Voltage‐controlled oscillator
Complementary metal oxide semiconductor
Figure‐of‐merit
Phase noise
Tuning range
Date: 2012
Issue Date: 2016-05-16T07:27:08Z
Publisher: Microelectronics International
Abstract: Abstract:Purpose
– The purpose of this paper is to design a low phase noise and high figure of merit, fully integrated, voltage‐controlled oscillator (VCO) which was fabricated in TSMC CMOS 0.18‐μm 1P6M process.

Design/methodology/approach
– A differential PMOS cross‐coupled architecture VCO with the capacitive feedback technology was designed to increase the linearity of frequency tuning range and decrease the phase noise. Varactor determining the performance of tuning range is also a key component in the design of VCO. The authors adopt the accumulation‐mode MOS varactor. The output spectrum and the phase noise are measured by E5052A spectrum analyzer.

Findings
– The VCO is successfully fabricated in TSMC RF CMOS 0.18um 1P6M process. The measured tuning range is from 10.875 GHz ∼ 11.1 GHz with control voltage from 0 to 1.5 V. The measured phase noise is as low as −120.42 dBc/Hz at 1 MHz offset and the high FOM is −189.5 dBc/Hz. The output spectrum is −10.51dBm with center oscillator frequency of 10.942 GHz. The core circuit without buffer consumes power of 15 mW from a 1.8 V supply voltage.

Originality/value
– This paper shows a fully integrated CMOS LCVCO architecture using capacitive feedback technology with low phase noise and high figure of merit for OC‐192 SONET applications.
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/37849
Appears in Collections:[電機工程學系] 期刊論文

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