BROADBAND DIFFERENTIAL OPERATIONAL AMPLIFIER Russian patent published in 2007 - IPC H03F3/45 

FIELD: radio engineering and communications.

SUBSTANCE: proposed broadband differential operational amplifier has first and second push-pull signal emitter followers 1 and 2 with low-resistance potential outputs 3, 4 and low-rating resistor 5 between them, first antiphase current outputs 6 and 7 matched with bus of positive power supply 8, second antiphase current inputs 9 and 10 matched with bus of negative power supply 1, as well as output adder 12 of signals arriving from first antiphase current inputs 6, 7 and 9, 10, respectively, of input push-pull signal emitter followers 1 and 2. Auxiliary resistor 20 is inserted between potential output 3 of first signal input push-pull emitter follower 1 and common bus.

EFFECT: passband independence on gain variations.

6 cl, 16 dwg