This switched or switched regulator was suggested by Texas Instruments in one of its application manuals. The circuit converts 5 V input to 12 V output with a current up to 75 mA.
In the figure below we have two triggers made with the LM3900 transconductance operational...
The trigger signal for this circuit is an audio tone. Tones up to close to 100 kHz can be used. The...
Found in an American documentation from the 90's, this 1.5 A power supply provides 1.5 to 22 V of...