| 摘要 |
FIELD: radio engineering, communication.SUBSTANCE: precision operational amplifier comprises: an input parallel-balancing stage, the first and second antiphase current outputs of which are connected to a first power supply bus through corresponding first and second current-stabilising two-terminal elements, first and second auxiliary transistors, the collectors of which are combined and connected to a second power supply bus through a third current-stabilising two-terminal element and coupled to the common source circuit of the input parallel-balancing stage, the base of the first auxiliary transistor is connected to the first current output of the input parallel-balancing stage, the base of the transistor is connected to the second current output of the input parallel-balancing stage, a first output transistor, the base of which is connected to the first current output of the input parallel-balancing stage, and the collector is connected to an input current mirror, which is matched with the second power supply bus.EFFECT: high attenuation factor of the input in-phase signal.2 cl, 14 dwg |
