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Design Method in Optimization Differential LCVCO
1 R" k" k6 l( LMAN J ia-han,ZHAOKun' f! n' I! j: ~) f/ r
( Institute of Microelectronic of Chinese Academy of Sciences, Beijing 1 00 0 29 , China)
: v4 t* P# @2 HAbstract:A n analysis of tw o fam ous oscillator phase- noise m odules derives the relations betw een phasen
$ F1 |4 F* P+ q1 P# j6 Xoise and circuit param eters. A nd hen ce, a design strategy to optim ize the phase noise of V C O , such as
6 Y+ W" t/ _& a2 O" Ldesigning high Q inductor, adjusting tail current and sizing the dim ensions of nM O S and pM O S, is presented.
2 `1 L( l7 [! J5 S5 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 result1 s, {5 [3 X4 | A0 _0 M
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 the4 w8 R. {7 P# ~' w' O9 L
m eth od is valid.( i% O% b- K/ g1 S; O8 D0 l
- \1 l( w ?& G$ C$ w; {1 _5 Z9 U- z' g' x2 I" T
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* w4 w. T" L9 a% ][ 本帖最後由 sjhor 於 2007-5-17 10:26 PM 編輯 ] |
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