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Design Method in Optimization Differential LCVCO* e( W9 p( a7 P
MAN J ia-han,ZHAOKun2 h7 p$ ~7 \- Q/ e6 ]) x6 z, p! h
( Institute of Microelectronic of Chinese Academy of Sciences, Beijing 1 00 0 29 , China)* C( `# z7 Q% K* J9 V
Abstract:A n analysis of tw o fam ous oscillator phase- noise m odules derives the relations betw een phasen
0 i' M: J* H0 K2 ioise and circuit param eters. A nd hen ce, a design strategy to optim ize the phase noise of V C O , such as+ f5 h" r0 I; I* l( L* O
designing high Q inductor, adjusting tail current and sizing the dim ensions of nM O S and pM O S, is presented.
: ]5 e5 ?+ J9 f& W0 mA 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
5 Z+ F) b& E) x: `, D0 Hdescribes 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
9 N$ U, N% t* b2 q _m eth od is valid.
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) W- S9 ? m" I6 Z* U4 Z[ 本帖最後由 sjhor 於 2007-5-17 10:26 PM 編輯 ] |
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