Found in a 90’s 73 magazine for radio amateurs, this circuit provides a few milliamps of output with -15 V from a 3 V input, when the consumption will be 10 mA.
This is an improvement on the previous circuit with a preamplification stage. The circuit is from...
This circuit was found in a Texas Instruments handbook about operational amplifier. It has a very...
This circuit was found in an American publication from 1965. The circuit uses components from that...