The gain of this amplifier is given by the components indicated in the formulas next to the diagram. The power supply must be symmetrical and equivalent operational amplifiers can be used.
We found this circuit in an old documentation from the 70s. Its purpose is to indicate the...
This simple thermostat circuit was found in the September 1976 issue of Radio Electronics...
This 6-transistor transistor radio is a RCA product from the 1960s. The circuit is powered by a 9...