Current sensing synchronous rectifier apparatus

Details Current sensing synchronous rectifier apparatus Current sensing synchronous rectifier apparatus

1991-02-11

1992-03-17

Stephan, Steven L.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

330 51, H02M 7217

Patent

active

050974033

ABSTRACT:
A current-sensing rectifier for current rectification and measurement applications is described. The current-sensing rectifier comprises a current-sensing device for rectifying the current in a selected circuit branch and an active-sense comparison circuit to measure the sense current provided by the current-sensing device. The current-sensing device and active measurement circuit are operated such that the current-sensing device rectifies the current of a selected circuit branch. No negative voltage supplies are required for rectification or for the measurement of the branch current. Further embodiments of the present invention include sample-and-hold circuits which sample the value of the rectified current during an ON-period of operation and maintain the sampled value during a subsequent OFF-period.

REFERENCES:
patent: 4543534 (1985-09-01), Seki et al.
patent: 4654568 (1987-03-01), Monsmann

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