This regulator or voltage reference consists of a variable zener diode. We found it in the June 1984 issue of Radio Electronics magazine. The output current is low.
Suggested by Motorola documentation from the 1980s, this circuit can be implemented with...
This oscillator reaches 50 MHz with an overtone crystal. The circuit is from Electronics Now...
This modulator circuit for low intensity signals is from old documentation. The integrated circuit...