| 摘要 |
FIELD: physics.SUBSTANCE: invention relates to electronic engineering and specifically to microwave phase changers on semiconductor devices. The active phase changer, made on SiGe semiconductor devices and including wide-band quadrature polyphase filter, consists of series-connected sections built on RC passive circuits, and facilitating generation of two orthogonally phase-shifted quadrature signals, an analogue differential adder having Gilbert cells, an amplifier and an adder, a digital signal unit configured to control each Gilbert cell, a matching link and a converter unit for converting the differential signal into a unipolar signal; also, at the output of the quadrature polyphase filter there are four emitter followers which facilitate matching with the circuit of the analogue differential adder.EFFECT: high reliability of the device.2 cl, 5 dwg |
