Voice Scrambler (CB22462E)

We found this circuit in a Popular Electronics from 1992. It consists of a voice scrambler used in telephone transmissions.

Multiplier with XR2208 (CB24544E)
This XR2208 application circuit was found in the April 1978 Radio Electronics magazine. The...
Frequency to voltage converter (CB6961E)
This circuit is from an old Elektor using components that are not currently common. The circuit is...
Current Sensor with AD Converter (CB5247E)
This 16-bit circuit was found in a 2005 Linear Technology application manual. The circuit uses...