This circuit is from an American 1964 documentation. Transistors of the time are used, but modern equivalents can be employed.
This dual operational circuit of the time was found in an American 1980s documentation. The...
Using two common operationals, such as 741, this circuit serves as a medium control in an...
The purpose of this 1-transistor amplifier is to allow the use of a milliammeter in an application...