Re: OPA657 oscillates with no input,but works with the input
- From: "Vitaliy" <m.vitaliy@xxxxxxxxx>
- Date: 14 Jun 2006 13:45:44 -0700
When I increased Rf the problem went away. However, this reduced my BW.
I obviously want to keep BW and gain the same (without using RCR
trick, I want to save it for later improvement in BW). Does anyone know
the workaround this problem?
Vitaliy
Vitaliy wrote:
I am using OPA657 as transimpedance amplifier. I have the photodetector
as the input.
When there is no input from the laser (even if the photodetectors are
closed with no light coming in) the output of the opamp oscillates
between -5 and +5V. Does anyone know why that is or what could the
problem be? The circuit is working and producing reasonable output when
the laser gives the signal. The exact same circuit with OPA655 does not
have this problem. I am using all SMD components.
Thanks,
Vitaliy
.
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