High impedance amplifier (CB7449E)

Suitable for the use with sensors, this circuit from National Semiconductor appears in other points of this section coming from other sources.

Alarm with NO and NC Sensors (CB4806E)
Radio Electronics magazine published in a 90's issue this simple alarm that can use any general...
Low Side Current Sensor LT2050HV (CB5235E)
This circuit is from the 2005 Linear Technology Application Manual. The circuit must be powered by 5...
5 W Darlington Amplifier (CB6177E)
We found this circuit in a 1969 General Electric documentation. The circuit uses transistors of the...