This circuit was found in a 1967 General Electric manual. It is intended for the control of high voltage Nixie pipes used at the time. SCRs may be equivalent.
This is the basic configuration of an operational amplifier sample & hold circuit. The FET and...
The integrated circuit 4136 consists of operational amplifiers of type 741 in the same enclosure and...
We find this circuit in a 1987 publication. It makes use of comparators constructed around the 741...