Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Current driver
Patent
1997-12-03
1999-08-10
Cunningham, Terry D.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Current driver
327309, H03B 100
Patent
active
059364408
ABSTRACT:
An inductive load driving apparatus for controlling current supplied from a battery to an inductor such as a generator field coil is composed of a first N-channel MOSFET switching element connected between a high-side terminal of the inductor and a high-side terminal of the battery, a second N-channel MOSFET switching element connected in parallel with the inductive load and a protection circuit having a back-flow current detecting element turning off the second N-channel MOSFET switching element when the inductor does not generate back-flow current. The second N-channel MOSFET switching element is turned on when the first N-channel MOSFET switching element is turned off and turned off when the first switching element is turned on. The first and second N-channel MOSFET switching elements are disposed integrally with each other on a semiconductor chip.
REFERENCES:
patent: 4831322 (1989-05-01), Mashino et al.
patent: 5075568 (1991-12-01), Bilotti et al.
patent: 5541806 (1996-07-01), Hoffman
Asada Tadatoshi
Kanazawa Wakako
Uematsu Tadashi
Cunningham Terry D.
Denso Corporation
Zweizig Jeffrey
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