3 V buffer (CB7142E)

This 3 V rail to rail buffer was found in a National Semiconductor documentation. The gain is unit.

Battery Low Indicator (CB4796E)
This circuit triggers the LED when the monitored battery voltage drops below 9 V for 12 V...
Instrumentation Amplifier (CB7825E)
Suggested by National Semiconductor, this circuit can be applied to almost any operational...
Doubler Crystal Oscillator (CB20664E)
This circuit was found in Radio Electronics from the 90s. The circuit can generate signals up to...