COMPLEMENTARY DIFFERENTIAL AMPLIFIER Russian patent published in 2008 - IPC H03F3/45 

FIELD: radio engineering and communications, possible use in various micro-electronic devices for amplification and transformation of analog signals with low power voltage.

SUBSTANCE: complementary differential amplifier contains input differential cascade (1) on n-p-n transistors (2) and (3), bases of which are connected to first (4) and second (5) inputs of complementary differential amplifier, collectors are connected to first group of outputs (6) and (7) of complementary differential amplifier, and emitters are connected to collector of output transistor (8) of support current supply (9), where emitter of transistor (8) is connected to bus (10) of negative power supply, base is connected to base of transistor (11) of support current supply (9) and connected to current-stabilizing dipole (12), and emitter of transistor (11) is connected to bus of negative power supply. And also contains second input differential cascade (13) on p-n-p transistors (14) and (15), collectors of which are connected to second group of outputs (16) and (17) of complementary differential amplifier, and emitters are connected to collector of transistor (18) of second supporting current supply (19), base is connected to base of second transistor (21) of supporting current supply (19) and connected to second current-stabilizing dipole (22). Introduced also are p-n-p transistor (23) and n-p-n transistor (24), collector of transistor (23) is connected to current-stabilizing dipole (22), which is connected to base of transistor (18) through circuit for matching static potential (25), and base of transistor (23) is connected to emitters of transistors (2) and (3) of differential cascade (1). Collector of transistor (24) is connected to current-stabilizing dipole (12), which is connected to base of transistor (8) through second circuit for matching static potential (26), and base of transistor (24) is connected to emitters of transistors (14) and (15) of differential cascade (13).

EFFECT: increased coefficient of weakening of input cophased signal.

3 cl, 9 dwg