This 9-bit DAC circuit was found in the RCA CMOS integrated circuits manual of the 1970s. The circuit operates at 15 V and consumes between 70 and 200 mW. The currents at each outlet are approximately 400 uA.
This circuit uses an old National Semiconductor operational amplifier, but it can be implemented with...
In this circuit the regulation is made from a circuit in the LED cathode. The configuration is...
For the component values used in thisf this circuit, the frequency can be adjusted between 740 Hz and...