Control apparatus for automotive generator

Electricity: single generator systems – Automatic control of generator or driving means – Voltage of generator or circuit supplied

Reexamination Certificate

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Details

C322S017000, C322S014000, C322S029000, C322S007000, C322S009000

Reexamination Certificate

active

07034508

ABSTRACT:
An A/D conversion device includes a counter for counting a clock signal fed from a clock signal generator, a D/A converter for converting a digital output of the counter into an analog value, a comparator for comparing an analog output of the D/A converter and an analog field current detection value fed from a current detecting resistor and outputting a result of comparison, and an up/down control circuit for switching the counter between count-up and count-down operations according to the result of comparison output from the comparator. The output of the counter is transmitted as a digital field current detection value to an external control unit which is an ECU of a vehicle via a communication interface.

REFERENCES:
patent: 3820009 (1974-06-01), Itoh et al.
patent: 5734239 (1998-03-01), Turner
patent: 6486639 (2002-11-01), Montret et al.
patent: 6794854 (2004-09-01), Nakatsu et al.
patent: 6819007 (2004-11-01), Fukaya
patent: 2002-281792 (2002-09-01), None

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