LT123 Low Voltage Linear Regulator (CB4399E)

The circuit presented is from the 1993 Linear Technology Applications. The components used were common at the time.

Tunnel Diode Voltage Controlled Oscillator (CB13335E)
The circuit shown in the figure is from a 1976 publication. Equivalent tunnel diodes can be used....
Electronic Vibrator (CB20061E)
This 1975 circuit for automotive applications replaces the mechanical vibrator found in old cars...
Antenna Switch Using Diodes (CB4177E)
This circuit is intended to switch high frequency antennas using common diodes. The circuit is from...