Institute Newton C. Braga

Circuit Bench

FM stages with tunnel diode (CB22545E)
This FM receiver input circuit with tunnel diodes was found in documentation from 1952. The...
Audio Compressor (CB4103E)
We find this circuit in an old American documentation. It can provide a 25 dB compression in a...
Automotive Voltage Regulator (CB1442E )
This circuit is from 1977 documentation, and high current equivalent transistor must be used. The...