This high-impedance headphone circuit was found in a 1990s William Sheets. The power is low, but the high input impedance makes it useful for radio applications.
We found this circuit in an Australian documentation from 1991. The circuit is suitable for SMD...
This circuit must be powered by a symmetrical source and depending on the integrated circuit the...
This circuit was published in the July 1993 issue of Electronics Now magazine. It uses a sensor from...