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Example for small signal noise in code model OTA

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Holger Vogt 2026-04-25 17:14:58 +02:00
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examples/xspice/noise/ota_noise_test1.cir Normal file
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* noise analysis with analogue code model
aota inn 0 out newota
*.model newota ota (gm=1 rout=1e12 rin=1Meg en=31n enk=100 in_noise=100u ink=10k incm=0 incmk=2k noise_programmatic=TRUE)
*.model newota ota (gm=1m rout=1e12 rin=1Meg en=31n enk=100 noise_programmatic=TRUE)
*.model newota ota (gm=1m rout=1e12 rin=1Meg in_noise=2p ink=500 incm=0 incmk=500 noise_programmatic=TRUE)
.model newota ota (gm=1m rout=1e12 rin=1Meg en=31n enk=100 in_noise=20p ink=2k incm=0 incmk=2k noise_programmatic=TRUE)
Vin in 0 dc 0 ac 1 sin (0 2 1.5k)
Rsource in inn 10k
Rout out 0 1
.control
*tran 1u 10m
*plot out
noise v(out) Vin dec 10 1 10MEG
print inoise_total onoise_total
display
setplot noise1
display
plot loglog inoise_spectrum
plot loglog onoise_spectrum
.endc
.end