This Intersil circuit was found in a 1980s documentation. Operational are of the time, but current equivalents can be experienced. The graph with the circuit performance is given next to the diagram.
In the figure we have an improved version of the previous version (CB3913E) with the use of a...
This high selectivity circuit for single tone decoding was found in 1970s documentation. The coil...
The indicated circuit generates frequencies in a range from approximately 500 Hz to over 5 kHz...