TWO-CYCLE CASCODE DIFFERENTIAL AMPLIFIER Russian patent published in 2008 - IPC H03F3/45 H03F3/26 

FIELD: radio engineering and communications, possible use as device for amplification of analog signals, in the structure of analog microchips of varying functional purposes (for example, in operational amplifiers).

SUBSTANCE: two-cycle cascode differential amplifier contains first and second differential cascades (1) and (6) based on n-p-n and p-n-p transistors respectively, bases of which are connected to inputs (2) and (3) of two-cycle cascode differential amplifier, and emitters are connected to collector of output transistor, of respectively first and second supplies of support current (4) and (7), which are matched, respectively, with bus (5) of negative and bus (8) of positive power supplies, bases of output p-n-p transistors (9) and (10) are combined and connected to positive supply of shifting voltage (11), bases of output n-p-n transistors (12) and 13 are combined and connected to negative shifting voltage supply (14), while emitters of transistors (9) and (10) through current-stabilizing dipoles (16) and (18) are respectively connected to bus (8) of power supply, and also to current outputs (15) and (17) of cascade (1), emitters of transistors (12) and (13) are connected respectively to first (19) and second (21) current outputs of cascade (6) and, respectively, through third (20) and fourth (22) current-stabilizing dipoles are connected to bus (5) of power supply, collectors of transistors (10) and (13) are connected to output (23) of two-cycle cascode differential amplifier. Collector of p-n-p transistor (9) is connected to base of output transistor of first (4) supporting current supply, and collector of first n-p-n transistor (12) is connected to base of output transistor of second supporting current supply (7).

EFFECT: increased coefficient of weakening of input cophased signals.

5 dwg