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.
This circuit can serve as a basis for a digital mixer or simply for a noiseless switch of audio...
This traditional mixer configuration with a high input impedance was found in a 90’s Popular...
This medium wave radio works with any general purpose NPN transistor. The diode must be made of...