Automatic Gain Control Circuit

The automatic gain control circuit AGC provides a signal with less harmonics and additional amplification, between certain limits. As a result, it eliminates those intensity differences, annoying, and of speech music, which sometimes appear on radio and television. Field effect Continue reading

Class A Preamplifier Circuit

This class A preamplifier has been designed in a symmetrical structure. In the input differential stages we’ve used the dual transistors T1 and T2. Polarisation correction is essential because of the amplification differences and is assured with T12. P2 brings Continue reading

Car Audio Amplifier TDA1557Q TDA1553Q

This stereo audio amplifier is for car purpose and can deliver up to 2 x 22W using a single TDA1557Q or TDA1553Q IC from Philips. TDA1557Q TDA1553Q datasheet Incoming search terms:Ic Tda1557Q circuit diagramtda1557 amplifier circuittda1557 amplifier diagramtda1557q circuit