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Design Method in Optimization Differential LCVCO! M' _: R- k g+ R; r$ s
MAN J ia-han,ZHAOKun" W3 Q# L* [7 M7 f; @1 U) ~' F
( Institute of Microelectronic of Chinese Academy of Sciences, Beijing 1 00 0 29 , China)
% q0 t% D0 S/ QAbstract:A n analysis of tw o fam ous oscillator phase- noise m odules derives the relations betw een phasen
. D9 ^! l- L) k: P; T! X- J0 Loise and circuit param eters. A nd hen ce, a design strategy to optim ize the phase noise of V C O , such as1 E& i: q) l8 r" k$ v
designing high Q inductor, adjusting tail current and sizing the dim ensions of nM O S and pM O S, is presented.2 w0 \ F8 Z7 `' T
A 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 f5 {- a5 @( `
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 O, d. ?# I* X' H: x8 x' \7 C
m eth od is valid.% \" c9 h2 y- w* o. T
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[ 本帖最後由 sjhor 於 2007-5-17 10:26 PM 編輯 ] |
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