Datasheet of This amplifier uses a pair of complementary transistors at the output and can provide 1 W of audio at a load of 3-ohm. Higher impedance speakers can be used. The circuit is from an English publication from 1986 and TR1 can be a | BC548. The supply can be done with voltages from 9 to 18 V. The trimpot adjusts the resting current, which must be in the order of 20 mA.
This circuit, from a 1997 documentation, is based on a pair of Motorola MC14026 dedicated...
This circuit is from a 1977 RCA manual of integrated circuits. The company no longer exists, and...
The figure shows a simple way to obtain a negative voltage from a common source configuration. The circuit is...
