Output-limiter


Posted on Feb 13, 2013

HA-5190 is rated for ±5 V output swing, and saturates at ±7 V. As with most op amps, recovery from output saturation is slow compared to the amplifier`s normal response time. Some form of limiting, either of the input signal or in the feedback path, is desirable if saturation might occur.


Output-limiter
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The circuit illustrates a feedback limiter, where gain is reduced ifthe output exceeds ± ( Vz + 21j-). A 5-V zener with a sharp knee characteristic is recommended.




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