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Design Method in Optimization Differential LCVCO
' j, I( {5 n7 o5 b8 jMAN J ia-han,ZHAOKun% G* w% w) A( i8 V5 e' K
( Institute of Microelectronic of Chinese Academy of Sciences, Beijing 1 00 0 29 , China)3 {2 d6 y2 ]$ F! G
Abstract:A n analysis of tw o fam ous oscillator phase- noise m odules derives the relations betw een phasen
1 Y. u3 _3 d% J3 S$ poise and circuit param eters. A nd hen ce, a design strategy to optim ize the phase noise of V C O , such as
8 _- s8 F7 W0 ?' m# G# zdesigning high Q inductor, adjusting tail current and sizing the dim ensions of nM O S and pM O S, is presented.
) B7 }) o+ {! W! Q, z M9 EA t the end of th is paper, a 2.4G H z fully integrated V C O design is m entioned. T he sim ulation result. G& v! Z! {4 ~' `: n
describes that the phase noise of the V C O is - 120.4dB c/H z@ 600 kH z. T his result proves th at the5 \& q$ c. P( E% u6 c
m eth od is valid.
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- r5 N8 _* p% n$ G% A[ 本帖最後由 sjhor 於 2007-5-17 10:26 PM 編輯 ] |
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