engrMunna
Advanced Member level 4
Hi,
I am using cadence virtuso and spectre. I have a closed loop circuit, which employs an op-amp in the loop. for the time being I am modeling the op-amp by a Voltage Controled Voltage Source (VCVS), with a high gain. For the VCVS , you can set its gain parameter and its maximum and minimum output voltage. When I don't put any limit on the max,min of the output voltages of the VCVC, the circuit works fine and the the output of the opamp is what it should be. The output is well within the range of the power supplies. But when I put the limit on output voltage equal to supply rails, it doesnt work. Any clues?
I am using cadence virtuso and spectre. I have a closed loop circuit, which employs an op-amp in the loop. for the time being I am modeling the op-amp by a Voltage Controled Voltage Source (VCVS), with a high gain. For the VCVS , you can set its gain parameter and its maximum and minimum output voltage. When I don't put any limit on the max,min of the output voltages of the VCVC, the circuit works fine and the the output of the opamp is what it should be. The output is well within the range of the power supplies. But when I put the limit on output voltage equal to supply rails, it doesnt work. Any clues?