COMPLEMENTARY PUSH-PULL CASCODE DIFFERENTIAL AMPLIFIER Russian patent published in 2009 - IPC H03F3/45 H03F3/26 

FIELD: radio engineering.

SUBSTANCE: invention relates to radio engineering and communication hardware, and serves to amplify analog signals. Proposed device comprises first (1) and second (2) input p-n-p common-base transistors (T) with their emitters connected, via appropriate first (3) and second (4) current stabilising dipoles (DP), to bus (5) of positive power supply (PS). It comprises also first (8) and second (9) input n-p-n common base transistors with their emitters connected, via appropriate third (10) and fourth (11) DP, with bus (12) of negative PS, first (15) output p-n-p T with emitter connected with PS bus (5) via fifth (16) DP, while its base is connected to collectors of T (2) and T (9). It includes second (17) output n-p-n T with its emitter connected with PS bus (12) via sixth DP (18) and its base connected to T base (15). Third (19) output n-p-n T has its base connected to T emitter (15). Fourth (20) output p-n-p T has its base connected with T emitter (17), and its emitter connected with that of T (19) and output (21) of CDA. Proposed circuit comprises additionally first (23) n-p-n and second (24) p-n-p additional transistors. Emitter of transistor T (23) is connected with collector T (1). Collector T (23) is connected with bases of T (1) and T (2), while base of T (23) is connected to emitter of T (15). Emitter of T (24) is connected with collector T (8). Collector T (24) is connected with integrated bases T (8) and T (9). Base T (24) is connected with emitter T (17). Note here that seventh DP (22) represents a resistor connected in between emitters T (23) and T (24).

EFFECT: increased coefficient of attenuation of input in-phase signals provided for due to automatic setting of static mode without using standard sources of reference current.

2 cl, 14 dwg