Precision differential amplifier (CB20907E)

This circuit has a 60 dB gain and a bandwidth of 68 MHz. We find it in Maxim's documentation.

Undervoltage indicator (CB9131E)
Found in National Semiconductor documentation from the 1980s, this circuit uses an operational...
2M voltmeter (CB22051E)
This basic voltmeter circuit has an input resistance of 2 M. The instrument is 100 uA and the...
Residential Alarm (CB9884E)
This simple alarm using only transistors was found in a 1990 publication. It can be powered by D...