Found in a 1970 documentation, this circuit makes use of 741 operational amplifiers that are common today. Note that the power supply must be symmetrical.
This is the conventional configuration of an astable multivibrator with operational, found in a...
This 1969 Electronics World power supply has 5 V to power digital circuits and a 170 V output for...
The Texas TL783 integrated circuit is a three-terminal high voltage regulator with a wide range of...