Solar radio (CB20485E)

This circuit is from a 1991 publication. The integrated circuit used is an integrated radio from that era.

Current monitor with digital output (CB7275E)
Found in Linear Technology documentation, this circuit drains only 70 uA of the monitored circuit....
Wien Bridge Oscillator with the LMV321 (CB4745E)
The LMV321 is a low voltage operational amplifier from ON Semiconductor. The following diagram,...
Moving scale DC voltmeter (CB7341E)
This circuit was found in an American publication in 1966. The circuit uses a general-purpose FET that...