This ultra-low distortion driver was found in 80's Analog Devices documentation. The circuit has a THD of -115 dB under load of 600 ohms at 20 kHz.
This well-known siren configuration using complementary transistors is from a 1980s documentation. The...
This circuit was found in an old American magazine and could make use of more modern components...
This circuit is from the Philips integrated circuits manual of 1990. It is intended for magnetic...