This circuit is from the 1982 SGS Linear Circuits Manual. The circuit provides currents from 35 mA to 1.5 mA set at P1 and Vref voltages at 26 V set at P2.
This audio step operates directly with the 110 V mains voltage rectified and reduced. The output...
Found in Radio Electronics from the 90s, this circuit uses components from that time. However, it...
The author of this 1995 article called it PWM, but it is really a switched source. The circuit...