We found this circuit in an old documentation. It can be elaborated based on modern components. The double transistor can be replaced by a matched pair.
Found in a 90s Popular Electronics, this circuit is interspersed between the filter and the...
This is the simplest function that triggers the load if the level of the input signal is 1. In...
This non-inverting AC amplifier was found in the February 1990 issue of Radio Electronics...