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.
This circuit was found in a Hands On Electronics from the 90s. The microphone is a small 75-ohm...
This JFET amplifier stage was found in the Encyclopedia of Electronic Circuits Volume 5 from 1995....
To obtain more output power from an operational amplifier, we can use a transistor, as shown in...