AD conversion control circuit and related arts

Details AD conversion control circuit and related arts AD conversion control circuit and related arts

2008-02-06

2010-12-14

Duda, Rina I (Department: 2837)

Electricity: motive power systems

Positional servo systems

Pulse-width modulated power input to motor

C318S811000, C318S569000, C318S600000

Reexamination Certificate

active

07852032

ABSTRACT:
A selector selects an analog signal group to be used for PWM control out of a plurality of analog signals output by a PWM controlled load. An AD converter AD converts the analog signal group and generates a digital signal group that becomes control data for duty ratio setting in a duty ratio setting register to provide the generated digital signal group to a control unit for controlling a PWM circuit. A duty ratio comparison circuit compares duty ratios set by the plurality of duty ratio setting registers. An AD conversion channel selection circuit controls an analog signal group selecting operation by the selector based on a comparison result of the duty ratio comparison circuit.

REFERENCES:
patent: 3648278 (1972-03-01), Miller
patent: 5349351 (1994-09-01), Obara et al.
patent: 5736948 (1998-04-01), Mitsuishi et al.
patent: 2003/0132086 (2003-07-01), Thompson
patent: 2004/0117676 (2004-06-01), Kobayashi et al.
patent: 2005/0219103 (2005-10-01), Ogawa
patent: 2006/0113938 (2006-06-01), Arai
patent: 2003-284374 (2003-10-01), None
patent: 2004-357450 (2004-12-01), None
The LSI Manual of MN103SA5K, Chapter 14, A/D Converter, pp. XIV-6-XIV-30 (Dec. 2004).

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