30 MHz Amplifier (CB5939E)

This low noise circuit was obtained from a 1980s US RF publication. Transistors used are uncommon today and the gain is 19 dB..

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Inverter Comparator with hysteresis (CB5080E)
This circuit was obtained in an old American manual. The circuit is valid for any operational. The...
Logic Control with Relays (CB4182E)
This two-relay circuit gives drive logic that is clear when analyzing the circuit. In the original...
Photodiode Detector (CB1588E )
This circuit, suggested by Philips Components (1980), uses a fast voltage comparator and requires...