Atmel Corporation
One Chip AM/FM Radio with Audio Power Amplifier
Philips Electronics
Interface and noise suppression circuit for FM receivers
Philips Electronics
Signal-sources switch
Philips Electronics
1 to 4 W audio power amplifier
Philips Electronics
13.7 V, proportional-control triac triggering circuit
Siemens AG
AF POWER AMPLIFIER IC WITH THERMAL SHUTDOWN
Philips Electronics
2 to 6 W audio power amplifier