Found in Popular Electronics from the 90s, this circuit mutes a scanner's speaker in the absence of a voice signal, thus eliminating the hiss.
This circuit was found in the July 1992 issue of Radio Electronics magazine. The circuit has a...
This circuit was found in a 1999 British magazine (ETI). It is a device that receives the signal...
We found this circuit in a 2005 Linear Technology manual. The circuit makes use of the LT6101 and...