Micropower amplifier (CB7461E)

This amplifier was found in an Electronics Now from the 90s. The FETs are part of a CD4007CB.

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Power CMOS Shield (CB19763E)
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Garage Warning (CB6041E)
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Humidity and Rain Alarm (CB17475E)
This simple humidity alarm circuit includes a timed warning oscillator whose time is set to R4....