This driver for audio signals using the TAA435 integrated circuit was found in Philips 1968 documentation. The integrated circuit is difficult to obtain today.
This circuit was found in a 1989 documentation and was intended to be part of a presence...
Found in a 1960 Mullard transistor manual, this circuit uses components from the time....
This MOSFET amplifier operating in the VHF range was found in an old American telecommunications...