Self-biasing JFET circuit (CB25563E)

This JFET amplification stage was found in the April 1993 issue of Electronics Now. The input impedance is 10 Megohms.

Sensors with Piezoelectric Coaxial Cables (ART337bE)
An interesting type of sensor for specific applications is the sensor formed by piezoelectric...
HeNe LASER power supply (CB9444E)
This circuit is from Radio Electronics from the 90s. It supplies a voltage between 800 V and 2 000...
Doppler Alarm (CB11609E)
This circuit was obtained in a 1989 publication and is quite simple to assemble, but critical in...