HI , try this code : P1 1 ss port=1 z0=100 $ input port includes DC bias P2 8 dd port=2 z0=2k $ port doubles as pull-up resistor ** noise simulation .option sim_accuracy=10 .option POST .ac dec 50 1G 20G .LIN noisecalc=1 sparcalc=1 format=touchstone .PRINT S11(DB) S21(DB) S12(DB) S22(DB) NF .PROBE NFMIN G_AS K_STABILITY_FACTOR .probe .op .end After the simulation finish, check the results in *.lis file. good luck

Siamak Zargari

Thanks. Do you know where P1 and P2 should be in the OTA circuit?

I got an error as shown in the photo.

Like similar items in signal input and output port.

To resolve this error, try to reduce the step of simulation

Hi I need help in calculating noise for a current mirror circuit in HSpice

Which commands to use

Thanks

Hi I need help to insert noise in a digital circuit in HSpice.

Which commands to use.