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 is from a book of transistors from 1954. The transistors are from the time and the...
This circuit generates an FM signal of 4.7 or 10.7 MHz for audio signals on analog TV or FM, with...
Found in a 1969 documentation on neon lamps, it actually takes advantage of the durability of the neon...