The operational amplifier used in this circuit is uncommon nowadays. We obtained this circuit from documentation from the 1980s, but it can be adapted to use more modern equivalents.
Found in Popular Electronics from March 1957, this circuit is based on transistors from the time....
The voltage gain of this circuit found in the 1982 SGS Linear Integrated Circuits manual is 10...
This circuit, found in an English publication in 1982, has an inverted sequential effect, as the...