Quick limiter with zener (CB8245E)

This symmetrical limiter or reaper circuit is based on a zener diode. Voltage drop across common diodes should be considered.

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Power Voltage Follower with the 741 (CB11885E)
With this configuration we have a voltage follower, amplifier with unit gain, in which the output...
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This circuit is from the Linear Circuits Application of Texas Instruments, using an operational amplifier...
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This amplifier, suggested by National Semiconductor (Now Texas Instruments), has high input...