General Purpose JFET Preamplifier (CB25568E)

Any JFET can be used in this circuit suggested by Electronics Now magazine, April 1993. The circuit has high output impedance.

Low Level Preamplifier (CB5002E)
This circuit was found in the Spanish magazine that no more existis Mundo Electrónico, in a...
External Shutdown Regulator (CB4857E)
A high level on the input of this circuit causes the trim voltage adjusted output voltage to drop to 1.2...
Adjustable Output Regulator (CB5872E)
This circuit is from old documentation, but the regulator may be 78xx series equivalent and the...