I would like to implement a 4th order sallen-key hp filter with two gain stages to filter/amplify an ultrasonic signal at 200kHz. The filter-incoming signal level rises continously and I need high gain particulary on the first few incoming periods which means that at a high gain later (in time) incoming signal-periods, at a high signal level, will force the op amp to go into saturation. This from the signal processing point of view is not a problem but I wonder if it would harm the op amps (OP2365) if they are forced to saturation in continous operation over years?
Saturation of the outptu stage will not have any negative consequences on the OpAmp (OPA2365) long term operation. Care needs to be taken to insure that out
Thanks, very useful info! But is your post finished, seems like it is cutt off after the first line " Care needs to be taken to insure that out .... " Is there something that you wanted to point to in addition?
Sorry for that. It was supose to be:
Care needs to be taken to insure that output current doesnot excede nominal value. In other words the load resistance as well as feedback resistor needs to be account as efective load to the OpAmp output.
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