BROADBAND AMPLIFIER Russian patent published in 2006 - IPC H03F1/42 H03F3/45 

FIELD: radio and communications engineering; miscellaneous microelectronic analog-signal amplifiers and converters.

SUBSTANCE: proposed broadband amplifier has differential stage built around transistors 3, 4 with main input 1 that functions as amplifier input and auxiliary input 2; emitters of these transistors are interconnected and collectors are coupled with load-circuit resistors 5, 6; it also has non-inverting current amplifier built around output transistor 7; differential-stage transistors 3, 4 have different polarities of conductivity and non-inverting current amplifier is provided in addition with input transistor 8 whose collector and base are integrated and connected to current supply 9 and to differential-stage auxiliary input 2, and its emitter is coupled with that of output transistor 7 having reverse polarity of conductivity whose collector is connected to differential-stage main input 1.

EFFECT: reduced input conductivity within broad frequency band and, hence, enhanced higher frequency limit.

1 cl, 4 dwg