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Design Method in Optimization Differential LCVCO& t. q& n+ R' F& w7 J
MAN J ia-han,ZHAOKun4 S: n/ n5 g4 t2 g" [% m7 j% @
( Institute of Microelectronic of Chinese Academy of Sciences, Beijing 1 00 0 29 , China)
$ A4 T1 ]' L# eAbstract:A n analysis of tw o fam ous oscillator phase- noise m odules derives the relations betw een phasen9 E; |* H; R& h& j& `) }
oise and circuit param eters. A nd hen ce, a design strategy to optim ize the phase noise of V C O , such as
1 {# H1 B8 D8 Y; C& {, Z/ O* B9 L: Idesigning high Q inductor, adjusting tail current and sizing the dim ensions of nM O S and pM O S, is presented.
# E8 Z) M6 Z7 X) nA 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
" ~% d' {0 v* f- `" ^( W. O# @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 the' C/ R; R' q, Y* g& K5 i' g/ v
m eth od is valid.
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[ 本帖最後由 sjhor 於 2007-5-17 10:26 PM 編輯 ] |
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