This circuit uses an unusual operational amplifier nowadays and has a very low consumption. The number in parentheses corresponds to the second channel, for a stereo version.
This circuit generates an FM signal of 4.7 or 10.7 MHz for audio signals on analog TV or FM, with...
This simple test for general purpose NPN and PNP transistors was found in a 1974 publication....
This circuit from a Radio Electronics magazine from June 1969 already shows the use of the newly...