The figure shows how to implement limiters with silicon diodes. The reaper cuts off the peaks of a signal and can function as noise limiter or amplitude limiter of a signal.
The circuit shown is from the National Semiconductor's Linear Applications Handbook. The CI is not...
This circuit is from the Linear Circuits Application of Texas Instruments, using an operational amplifier...
Found in an RF Design from the 90's this circuit is intended for crystals of less than 1 MHz....