This circuit was found in a 1965 Radio Shack documentation. The transistors are from that time. The circuit can be implemented with current transistors and lower voltage supply.
This circuit was suggested by Signetics in 1980s documentation. The circuit makes use of the...
This circuit was suggested by Texas Instruments in a 1980s documentation. The transistor must be...
We find this circuit in an American 1980s documentation. It can be applied to any operational...