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用transmission gate 模擬電阻約40k7 l: e8 N9 N. j% ~/ y
(附上HSPICE)
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Mrn vi vdd vo gnd nch5 l=3u w=1u
) E5 v3 d0 l+ c5 G" fMrp vi gnd vo vdd pch5 l=3u w=1u 3 H5 f4 F2 c5 d$ X
# g# L* l$ e, d+ E vi vi gnd dc 3.7v9 b6 v4 n+ Q7 t
vdd vdd gnd dc 5v
* u0 N" h: p3 d.op
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.dc vi 0 5 0.01
& [$ b6 d h% `# y2 N% x7 p/ W.print |(Mrp)|(Mrn)rp=par('1/lx8(Mrp)')rn=par('1/lx8(Mrn)')
; n8 P* a2 N' T! M# S+req=par('1/(lx8(Mrp)+lx8(Mrn))')
" m$ ^% }) C: I; z( N.end
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5 N1 X* ?# N$ T7 n3 I$ {& Q+ G p- _************************
2 C$ `- v* X# V! G9 o: l+ T! q問題是VI灌3.7時,發現MRN會進入截止區5 I0 y! R. v# Z. l s" r- e. w
但....模擬圖還是顯示R=40K,請問這種T.R電阻還可以用嗎?還是兩個MOS都要在SAT區? |
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