Electric power conversion systems – Current conversion – Using semiconductor-type converter
Patent
1989-09-14
1990-07-10
Wong, Peter S.
Electric power conversion systems
Current conversion
Using semiconductor-type converter
307261, 328 26, 323316, G01R 1922, G08C 1300
Patent
active
049410806
ABSTRACT:
A full wave rectifier circuit comprising a differential amplifier which drives a rectifier stage via a driver stage and to which negative feedback is applied. A signal current to be rectified is applied to an input of the differential amplifier. This current flows directly to the output of the rectifier stage during one half-cycle and is applied to said rectifier stage via a first current mirror during the other half-cycle. The supply current of this current mirror together with the supply current of the driver stage are delivered by a current source. A reduction of the voltage offset is obtained in that the current source is a controllable current source, which is controlled by a current derived from the output current of the first current mirror in such a way that the supply current of the current mirror corresponds to the varition in the current from the current source caused by the control action.
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Franzblau Bernard
U.S. Philips Corporation
Wong Peter S.
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