Broadband Balanced Mixer MC1556G (CB14563E)

We found this circuit in Motorola's Linear Databook in 1990. The integrated circuit used is no longer common today.

Tunnel Diode 50 MHz converter (CB20241E)
This converter converts signals from the 50 MHz band to the AM band, making it possible to receive...
RIAA Preamplifier (CB19519E)
This circuit from the 1980s uses an operational amplifier that is uncommon today. The circuit can...
Infrared Remote Control (CB4896E)
We find this circuit in an American 1980s documentation. Integrated circuits are uncommon today as...