Undervoltage detector with the LM3900 (CB25172E)

The figure shows how to implement an undervoltage detector using a Norton amplifier and a zener diode as the main elements.

Parallel regulator (CB22266E)
This low current parallel or shunt type regulator was found in documentation from the 60's. The...
Current Monitor Circuit (CB12972E)
We show in the figure how to implement a current monitor circuit using only an operational...
Instrumentation Amplifier (CB21572E)
Using circuits from Analog Devices, this circuit does not need a symmetrical power supply. It is...