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ideal opamp in ahdlib

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viperpaki007

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Hi,

Has anybody used ideal opamp from cadence ahdllib. I am trying to simulate it with Vsupply_p=1.2V, Vsupply_n=0V and Vref=600mV in unity gain configuration. However, for a sine wave input, output is just a constant dc voltage. I tried to change different parameter values but it did not work.
 

Show the circuit. Are you familiar with single-supply operation?
 

Simulation parameters
Vin =450mV p-p
Input voltage dc-offset =600mV
Ibias =1uA
Iinmax = 1mA
Rout =10 ohm
Rin =10M
Vinoffset =0V
Gain =708
Slewrate = 825MV /sec
Unity gain freq = 1.4GHz
Vref =600m
Vsupply_p =1.2V
Vsupply_n =0V
RL =100K
CL =100f


 

What is the purpose of Vref ?
 

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