The Confidential Frequencies irratsaioaren saio berri bat!
The Confidential Frequencies 2014-5-9
The Confidential Frequencies irratsaioaren saio berri bat!
but blocks the DC bias voltage established by resistors R1 and R2 so that any preceding circuit is not affected by it. Q1 and Q2 form a differential amplifier (an amplifier that multiplies the differe, in an arrangement known as a long-tailed pair. This arrangement is used to conveniently allow the use of negative feedback, The input signal is coupled through capacitor C1 to the base of transistor Q1. The capacitor allows the AC signal to pass, which is fed from the output to Q2 via R7 and R8.