Institute Newton C. Braga

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Circuit Bench

Transistor Audio Amplifier (CB920E)
This circuit was found in old publication from 1958. The circuit uses germanium transistor, common in...
Third Order Asymmetrical Butterworth Filter (CB5110E)
This asymmetrical crossover filter was obtained from an 80s integrated circuit manual. The...
Mixer with the 741 (CB4893E)
This circuit was originally designed for communications applications. We found it in a 1980s...