This two-tone decoder has a bandwidth of 24%. The circuit is from a 1994 Electronics Now. The components without the value determine the recognized frequency.
The circuit is of the Motorola Linear Databook of 1990. The power source must be symmetrical and the...
We found this circuit in a 1967 RCA SCR manual. The circuit uses components from the era. The...
The transistors of this circuit may be the BC548 or BC549 and its power supply can be performed...