This is a precision half-wave rectifier, suggested by Texas Instruments. Diodes are commonly used, and resistors can have signal values. The power supply must be symmetrical.
This circuit was obtained in a 1978 publication, but it can be assembled with current components like...
This circuit was obtained in a 1977 magazine, but it can still be assembled with BC548...
We found this circuit in Popular Electronics from 1992. Time is given by C1. The circuit provides an...