2010-11-27 17:36:03 +01:00
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* simple sample & hold, transient noise
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* switch control
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* PULSE(V1 V2 TD TR TF PW PER)
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vgate1 ga1 0 dc 0 pulse (0 1 0 10n 10n 90n 200n)
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Switch1 1 2 ga1 0 smodel1
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* noisy input
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* rms value white, time step, exponent < 2, rms value 1/f
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vin 1 0 dc 0 trnoise 0.1m 0.2n 1 0.1m
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*vin 1 0 dc 0 trnoise 0.1m 0.2n 0 0.1m
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* output
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c2 2 0 10p
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* second S&H
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vgate2 ga2 0 dc 0 pulse (0 1 140n 10n 10n 30n 200n)
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*Buffer EXXXXXXX N+ N- NC+ NC- VALUE
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e1 4 0 2 0 1
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Switch2 4 3 ga2 0 smodel2
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c3 3 0 10p
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.option itl1=500 gmin=1e-15 itl4=10 acct
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.model smodel1 sw vt=0.5 ron=100
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.model smodel2 sw vt=0.5 ron=100
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.tran 0.4n 100u
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.control
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unset ngdebug
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set filetype=ascii
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rusage
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run
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rusage all
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write noi_test.out v(1)
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plot v(2) v(3) xlimit 4u 5u
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plot v(ga1) v(ga2) xlimit 4u 5u
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linearize
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*rms v(1)
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fft v(3)
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plot mag(v(3)) loglog xlimit 1e4 1e8 ylimit 1e-10 1e-4
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setplot tran1
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linearize
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psd 101 v(3)
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2017-09-02 10:25:31 +02:00
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plot mag(v(3)) xlimit 0 3e7 ylabel V^2/Hz
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2010-11-27 17:36:03 +01:00
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.endc
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.end
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