DIFFERENTIAL AMPLIFIER WITH HIGH AMPLIFICATION RATIO Russian patent published in 2011 - IPC H03F3/45 H03F1/32 

FIELD: electricity.

SUBSTANCE: differential amplifier comprises an inlet differential cascade (DC) (1) with the first (2) and the second (3) current outlets, the first outlet transistor (T) (4), the base of which is connected to the first (2) current outlet of DC (1) and the first outlet of a load dipole (5), the first current-stabilising dipole (CSD) (6), connected to an emitter of T (4), a power supply voltage source (PSVS) (7). The circuit includes the first and second additional outlet T (8), T (9), the emitter T (8) is connected with the emitter T (4), a collector of which is connected to the PSVS (7) via the first additional dipole (10) and is connected to the base T (9), the emitter of which is connected to the second outlet of the load dipole (5), and via the second additional dipole (11) is connected to the base T (8) and the device outlet, besides the collector T (9) is connected to the PSVS (7).

EFFECT: increasing amplification ratio 8-10 times by voltage while arranging a load dipole as a comparatively low-resistance resistor.

4 cl, 7 dwg