DIFFERENTIAL OPERATIONAL AMPLIFIER WITH PARAPHASE OUTPUT Russian patent published in 2011 - IPC H03F3/45 H03F3/34 

FIELD: electricity.

SUBSTANCE: differential amplifier (DA) comprises the first (1) and the second (2) input transistors (T), bases of which are connected to inputs (3) and (4) of the device, the first (5) current-stabilising dipole connected between a combined emitter of the first (1) and the second (2) input T and a bus of the first (6) source of supply (SS), the first (7) and the second (8) output T, collectors of which are connected to the bus of the second (9) SS, emitters are connected with according paraphase outputs (10), (11) of the device and are connected to each other via two serially connected the first (12) and the second (13) resistors of the feedback circuit, the first (14) dipole of the collector load connected between the base of the first (7) output T and the bus of the second (9) SS, the second (15) dipole of the collector load connected between the base of the second (8) output T and the bus of the second (9) SS. The circuit includes the first (16), the second (17) and third (18) additional T, combined emitters of which via the first (19) auxiliary dipole are connected to the bus of the first (6) SS, the base of the first (16) additional T is connected with the source of potentials voltage shift (20), combined bases of the second (17) and third (18) additional T are connected with a common unit of serially connected first (12) and second (13) feedback resistors, the collector of the second (17) additional T is connected to the base of the first (7) output T, the collector of the third (18) additional T is connected to the base of the second (8) output T, besides, the emitters of the first (7) and second (8) output T are connected to the bus of the first (6) SS via according the first (21) and the second (22) auxiliary dipoles.

EFFECT: creation of conditions, at which the output static cophased voltage of the differential amplifier will have high stability and zero value.

3 cl, 6 dwg