Chrysler Corporation

Abbas T Sabbah

Patrick D Dean

A pulse width dimming system responsive to low frequency pulse width modulated signals of various duty cycles employs a single charging capacitor in a charge pump circuit to develop voltage signals for controlling current through a field effect transistor used to control dimming of the intensity of lamps in a vehicle instrument panel.

Vehicle instrument panel lamps, pulse width dimmer system therefor

A pulse width dimming system responsive to low frequency pulse width modulated signals of various duty cycles employs a single charging capacitor in a charge pump circuit connected between a voltage source and the output of an FET for developing voltage pulse signals for controlling current through a field effect transistor used to control the intensity of lamps in a vehicle instrument panel.

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Sterling Heights, MI, United States of America

Abbas T Sabbah