jimito13
Advanced Member level 1
Hi,i have designed a fully differential opamp.Let's say that my unity gain freq is x, after the open-loop simulations.When i close the loop with resistive feedback elements (R=100K at the feedback loop,R=10K at the input -- so closed loop gain to be 20dB) and i run ac analysis i notice at the bode diagram of the gain that the unity gain freq is much more under the x value...Below i show you my testbench.The vsin sources are set up as :
vsin for the plus input --> vdc=vdd/2 and ac magnitude=500mV
vsin for the minus input --> vdc=vdd/2 and ac magnitude=500mV and ac phase=180deg
Thanks in advance for any helpful answer.
vsin for the plus input --> vdc=vdd/2 and ac magnitude=500mV
vsin for the minus input --> vdc=vdd/2 and ac magnitude=500mV and ac phase=180deg
Thanks in advance for any helpful answer.