Both the operational amplifier and the diodes admit equivalents in this circuit suggested by National Semiconductor. The power source must be symmetrical, and the circuit curve resembles an ideal diode.
May 2017 - Microchip LAN8710A and LAN8710Ai integrated circuits, low-power, high-performance...
This circuit of 1965 documentation makes use of a tunnel diode to retard a pulse without...
This circuit was found in the 1972 RCA Power Transistor Databook. Transistors can be replaced by...