Institute Newton C. Braga

Circuit Bench

RIAA Equalization (CB6317E)
The operational amplifier used on this 1968 circuit is not common today. However, the setting can be...
FET Crystal Oscillator II (CB19849E)
This configuration reaches a few tens of megahertz depending on the crystal and the FET....
Tremolo (CB23893E)
This optically coupled circuit was found in the February 1968 Radio Electronics magazine. The...