DIFFERENTIAL OPERATIONAL AMPLIFIER WITH PARAPHASE OUTPUT Russian patent published in 2014 - IPC H03F3/34 

FIELD: radio engineering, communication.

SUBSTANCE: amplifier includes third and fourth input transistors, emitters of which are connected to emitters of first and second input transistors, wherein the base of the third input transistor is connected to the base of the first input transistor, the base of the fourth input transistor is connected to the base of the second input transistor, collectors of the third and fourth input transistors are connected to the bus of a second power supply, emitters of the first and second input transistors are connected to emitters of the first and second additional transistors, the collector of the first additional transistor is connected to the collector of the first input transistor, the collector of the second additional transistor is connected to the collector of the second input transistor, wherein the first auxiliary output of the device is connected to bases of the first and second additional transistors through a first feedback resistor, and the second auxiliary output of the device is connected to bases of the first and second additional transistors through a second feedback resistor.

EFFECT: high stability of the output static in-phase voltage of the differential operational amplifier with a zero input in-phase signal.

2 cl, 7 dwg