This circuit was found in a1980s Motorola documentation. The integrated circuit is from that time. The frequency depends on the crystal.
This oscillator with FET was found in Popular Electronics from the 90s. This traditional...
This low-power circuit was found in the March 1990 issue of Radio Electronics magazine. It...
This circuit found in a 1964 US publication reverses the signal level by providing 9 to 0 V...