應用於汽車雷達高速分數型頻率合成器之設計與實現

林佳俊

doi:10.6845/NCHU.2012.00138

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應用於汽車雷達高速分數型頻率合成器之設計與實現

Design and Implement of High Speed Fractional Frequency Synthesizer for Automotive Radar

林佳俊 , Masters　　Advisor：楊清淵　　

繁體中文 DOI： 10.6845/NCHU.2012.00138

鎖相迴路；頻率合成器；相位雜訊；振盪器； phase locked loop ； frequency synthesizer ； phase noise ； voltage control oscillator

Abstract │ Reference (86) │ Times Cited (2) │ Altmetrics

Abstract 〈TOP〉

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With the rapid advances in technology, the operation frequency of the   microprocessor is increasing rapidly. In wireless communication system, the wide bandwidth technique proposed future trends.In the thesis we proposed take high-speed wireless communications as the research topic.

First, a Colpitts oscillator which is used to the automotive radar is introduced. Its oscillator frequency and start condition are different from the traditional ones. We derivate and simulate this oscillator to prove that it can operate in high frequency and be easy to oscillate.

The second part describes a current-reused quadrature VCO with a frequency doubler to achieve the high-frequency and low-power characteristics. The crcuit is fabricated in TSMC 0.18um CMOS process, and the power consumption is 6.7mW under a 1.8-V supply voltage. At 1-MHz offset from a 5-GHz carrier of the oscillator and a 9.94-GHz carrier of the frequency multiplier, the measured phase noises are -126.96 dBc/Hz and -118.38 dBc/Hz respectively.
   
Finally, to solve the problem of insufficient resolution in a high-speed frequency synthesizer, a high-speed and dual-modulus prescaler is presented. This architecture can not only apply to high-speed frequency synthesis but also suppress quantization noise in the delta-sigma modulator based frequency synthesizers. Moreover, the proposed circuit can solve the spike in the prescaler. The chip output frequencies are 11GHz and 22GHz on the main tone and the double tone respectively. The phase noise at 1MHz offset are about -106.72dBc/Hz and -89.75dBc/Hz. It dissipates 28mW with 1.8-V supply, and the total area is 1.19×1.6mm2

Reference ( 86 ) 〈TOP〉

[1]D.B.Lesson,“A simple model of feedback oscillator noise spectrum,”in Proc.IEEE,vol.54,pp.329-330,Feb.1996
連結：
[2]J.J.Rreal,A.A.Abidi,“Physical Processes of Phase Noise in Differential LC Oscillators,”IEEE Custom Integrated Circuits Conference,2000
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[3]T.H.Lee,A.Hajimiri,“Oscillator Phase Noise:A Tutorial ”IEEE J.Solid-StateCircuits,vol.35,pp.326-336,March 2000
連結：
[4]D.Ham,A.Hajimiri,“Cocept and methods in Optimization of Integrated LC VCOs”IEEE J.Solid-State Circuits,vol.36,June 2001
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[5] J. Yuan and C. Svensson, “Fast CMOS nonbinary divider and counter,” Electronics Letters, pp. 1222-1223, June 1993.
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Times Cited (2) 〈TOP〉

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