Transistor power circuit with preventive diode bridge

Details Transistor power circuit with preventive diode bridge Transistor power circuit with preventive diode bridge

1978-08-04

1980-06-24

Hix, L. T.

Electrical transmission or interconnection systems

Electromagnet or highly inductive systems

307246, 307257, 363 31, 363 56, H02M 748

Patent

active

042097118

ABSTRACT:
Chopped current is supplied to an inductive load from a DC source that is switched by a pair of transistors having stacked emitter-collector paths between terminals of the source. Bases of the transistors are driven so that current can be supplied to the load from the source through the emitter-collector path of a first of the transistors during a first interval while the emitter-collector path of a second of the transistors is cut off. Current can flow from the load through the emitter-collector path of the second transistor during a second interval while the emitter-collector path of the first transistor is cut off. A diode bridge circuit connected between the emitter-collector paths and to the load, as well as to a bias circuit for one of the transistors, prevents current flow through the emitter-collector path of the first transistors while the second transistor is conducting regardless of the tendency of the base drive for the transistors to render the transistors simultaneously into a conducting state.

REFERENCES:
patent: 3284641 (1966-11-01), St. John
patent: 3573501 (1971-04-01), Diehl
patent: 3796894 (1974-03-01), Marchetti et al.
patent: 4125814 (1978-11-01), Baker

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