See attached figure.
This is a simple floating resonator driven by current sources.
I expect voltage swing centered at 0volt both for p0 and n0 nodes.
But Cadence Spectre give no swing at n0 and twice swing at p0.
While Agilent ADS on RFDE give voltage swing centered at 0volt both for p0 and n0 nodes I expect.
Why Cadence Spectre give such results ?
This is true for Tran, Shooting-PSS and HB-PSS in Cadence Spectre.
The followings are netlist I used.
Quote:// Generated for: spectre
// Generated on: Nov 20 14:05:23 2008
// Design library name: Test
// Design cell name: Aho_Cadence_Spectre
// Design view name: schematic
simulator lang=spectre
global 0
// Library name: Test
// Cell name: Aho_Cadence_Spectre
// View name: schematic
L0 (net021 net028) inductor l=7.7m
R1 (net028 n0) resistor r=150/2
R0 (p0 net021) resistor r=150/2
I1 (n0 0) isource type=sine freq=134.2K ampl=40u pacmag=1 mag=1
I0 (0 p0) isource type=sine freq=134.2K ampl=40u pacmag=1 mag=1
C0 (p0 n0) capacitor c=5.2p
C1 (p0 n0) capacitor c=178p
simulatorOptions options reltol=1e-3 vabstol=1e-6 iabstol=1e-12 temp=27 \
tnom=27 scalem=1.0 scale=1.0 gmin=1e-12 rforce=1 maxnotes=5 maxwarns=5 \
digits=5 cols=80 pivrel=1e-3 sensfile="../psf/sens.output" \
checklimitdest=psf
dcOp dc write="spectre.dc" maxiters=150 maxsteps=10000 annotate=status
dcOpInfo info what=oppoint where=rawfile
pss pss flexbalance=yes fund=134.2K harms=3 errpreset=moderate
+ tstab=0 method=gear2only relref=alllocal maxperiods=200
+ annotate=status outputtype=freq maxiters=15 restart=no
designParamVals info what=parameters where=rawfile
saveOptions options save=allpub
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Unreasonable Results of Cadence Spectre (Read 6893 times)