The TAA300 integrated circuit is not common today. In fact, the circuit shown is from a Dutch Philips documentation from 1969. The output is 8 ohm speaker and 9 V power supply.
We found this circuit that protects speakers against current surges that occur when the amplifier is...
Found in a 70’s documentation, this circuit can operate with signals up to 10 MHz. The operational...
This circuit consists of a voltage regulator for 6 V batteries with a very low voltage drop. The...