Simple Output-limiter Circuit Diagram

Simple Output-limiter Circuit Diagram 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. 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. 

Simple Output-limiter Circuit Diagram