CASCODE DIFFERENTIAL AMPLIFIER Russian patent published in 2009 - IPC H03F3/45 

FIELD: physics.

SUBSTANCE: cascode differential amplifier comprises inlet parallel-balance cascade (1), current inlets of which (2) and (3) are connected to emitters of the first (4) and second (5) outlet transistors and via current-stabilising resistors (6) and (7) are connected to bus of supply source (8), the first (9) source of reference current connected by collectors of the first (4) outlet transistor and base of auxiliary transistor (10), emitter of which is connected to bases of the first (4) and second (5) outlet transistors and the first outlet of auxiliary two-terminal device (11), the second (12) source of reference current connected to collector of the second (5) outlet transistor and base of inlet transistor (13) of outlet emitter repeater. The second outlet of auxiliary two-terminal device (11) is connected to inlet (14) of additional current mirror (15), outlet of which (16) is connected to emitter of inlet transistor (13) of outlet emitter repeater.

EFFECT: reduced voltage of zero shift.

5 dwg