I have built an op amp impedance gyrator to apmplify the signal from an IR photo diode at around 5 KHz.
The circuit is very simple, but it self-oscilates if the supply voltage is lower than 9.5 volt. At higher Vcc it performs very well. But occasionally Vcc drops below 9.5 and the oscillation is there again.
Any ideas?
The op amp is a TL062 as I need it to be low power. It is close to the upper frequency limit but goes OK.
The circuit is very simple, but it self-oscilates if the supply voltage is lower than 9.5 volt. At higher Vcc it performs very well. But occasionally Vcc drops below 9.5 and the oscillation is there again.
Any ideas?
The op amp is a TL062 as I need it to be low power. It is close to the upper frequency limit but goes OK.