Direct Output Coupling Amplifier (CB6202E)

This power step drains just 3.5 mA from the battery and can provide good playback on a 4-ohm speaker. The circuit is from an 80's documentation.

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Multi Loop Alarm (CB6414E)
We found this circuit in a Popular Electronics of the 90s. The circuit can be easily mounted...
Delayed Turn-On and Off Gate (CB124E)
Different delays for the rise time and fall time of the output signal when compared with the input...
Larger Current CMOS Doubler (CB4634E)
In this circuit, the current capacity doubles, but is still of the order of microamps. The...