This low power circuit for the FM band was found in a spy book from the 90s. The tunnel diode is not an easy component to obtain and the power can be supplied with a single button cell.
This two-tone decoder has a bandwidth of 24%. The circuit is from a 1994 Electronics Now. The...
This circuit was found in documentation from the 90s, being indicated for the deflection of...
This circuit decodes a two-bit value into four outputs (one of four). The circuit must be powered by...