Micro Power Schmitt Trigger (CB25139E)

Using a CA3030, this circuit was found in the May 1988 Radio Electronics magazine. The power supply must be symmetrical.

| Clique na imagem para ampliar |

Cascode RF Amplifier (CB9173E)
This amplifier with two FETs in direct coupling (cascode) was found in a 90s Popular Electronics. The...
Proximity alarm (CB8486E)
This circuit, which is present in other points of this website, was found in a 90s Hands On...
Stable preamplifier for Microphone (CB12462E)
This microphone preamp found in a 1995 documentation offers stable microphone operation. The...