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.
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...