Differential amplification basic circuit

Published:2011/6/14 1:19:00 Author:Christina | Keyword: Differential amplification, basic circuit | From:SeekIC

The differential amplification basic circuit is as shown in the figure. It is composed of two single tube amplifier circuit with the same parameters. The resistances of RB11 and RB22 are the same, they are the current-limiting resistance of the input circuit; the resistances of RB21 and RB22 are the same, they are the biasing resistor; the resistances of Rc1 and RC2 are the same, they are the collector load resistor; R is the pressure equalizing resistance of the input port, it is also the under bias resistor. The signal is input from the base electrodes of VT1 and VT2, and the signal is output from the collectors of VT1 and VT2, so this circuit has two input ports and two input ports. The differential amplifier circuit has the high magnification to the differential mode signal, and it also has the strong inhibiting effect to the mode signal, so it solves the contradiction between the amplification and zero drift perfectly. Figure The differential amplification basic circuit



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