myatham
Member level 3
Hi All,
We are using one voltage reference 2.5V to bias two AC-Coupled non-inverting amplifiers with gains 4 and 50. But, i could see that output is oscillating. Vref is found to be overshooting to a value of 3.6V from 2.5V. I am suspecting it is operational amplifier stability issue. But, if i provide external reference voltage 2.5V from APLAB power supply, there is no oscillation found. This issue is observed only with Gun diode input which is in the range of 1mV. Please suggest here how to overcome this stability issue.
Thanks in Advance!
We are using one voltage reference 2.5V to bias two AC-Coupled non-inverting amplifiers with gains 4 and 50. But, i could see that output is oscillating. Vref is found to be overshooting to a value of 3.6V from 2.5V. I am suspecting it is operational amplifier stability issue. But, if i provide external reference voltage 2.5V from APLAB power supply, there is no oscillation found. This issue is observed only with Gun diode input which is in the range of 1mV. Please suggest here how to overcome this stability issue.
Thanks in Advance!