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