This circuit was found in a 90s EDN. In it we have the use of LEDs and diodes to stabilize the supply voltage of a CMOS load.
The circuit shown is a documentation on 80's tunnel diodes. The frequency depends on the delay line...
This circuit generates excellent sinusoidal signals and has the frequency adjusted by VR1 which is...
This circuit was adapted from an Italian publication that no longer exists. This is “Onda Quadra”...