DIFFERENTIAL AMPLIFIER WITH HIGH-FREQUENCY COMPENSATION Russian patent published in 2011 - IPC H03F1/42 H03F3/45 

FIELD: electricity.

SUBSTANCE: differential amplifier (DA) includes the first (1) and the second (2) input transistors (T) the emitters of which are connected through the first (3) current-stabilising bipole (CB) to the first (4) bus of power supplies (PS), the first (5) resistor of collector load, the first output of which is connected to output (6) of DA, collector of the second (2) input T and collector of the first (7) auxiliary T, the second (8) CB connected between emitter of the first T (7) and the first (4) bus of PS; at that, collector of the first (1) input T is connected to the second (9) bus of PS. The second output of resistor of collector load (5) is connected to the second (9) bus of PS through the first (10) additional resistor and connected to emitter of the first T (7) through the first (11) balancing capacitor; at that, base of the first T (7) is connected to the first (12) circuit of setup of its static mode.

EFFECT: increasing amplification coefficient in the range of medium frequencies till level the possibility of excluding additional cascades of A (amplifier) in some cases, and reducing common energy consumption in comparison to multi-cascade A.

5 cl, 14 dwg