This power inverter or voltage inverter generates high voltage from 24V and 5V supplies. We found it in an old American documentation. Transformer and MOSFET are according to the desired power.
This circuit was found in a 1992 publication, using an operational amplifier not very common...
This is a amplifier for XTAL high impedance earphones or piezoelectric types. Current drain is...
This circuit is from the LM111 manual of the 1980s. The component no longer exists, but...