Browse Prior Art Database

REAL TIME INTERRUPT

IP.com Disclosure Number: IPCOM000024766D
Original Publication Date: 1981-Dec-31
Included in the Prior Art Database: 2004-Apr-03
Document File: 2 page(s) / 43K

Publishing Venue

Xerox Disclosure Journal

Abstract

A copier controller using a microprocessor incorporates an interrupt which occurs when the AC line voltage passes through zero voltage. During the interrupt, all controller output latches are updated. All electromagnetic components within the machine can be either switched on or off when the AC line voltage is zero.

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XEROX DISCLOSURE JOURNAL

REAL TIME INTERRUPT Proposed Lawrence P. Lavery Classification

U.S. CI. 355/14R Int. CI. G03g 15/00

A copier controller using a microprocessor incorporates an interrupt which occurs when the AC line voltage passes through zero voltage. During the interrupt, all controller output latches are updated. All electromagnetic components within the machine can be either switched on or off when the AC line voltage is zero.

There are two main advantages to this design: (1) switching components are not stressed with high in rush currents. This reduced stress level improves the reliability of these components and (2) RF noise emitted by the machine, both conducted and radiated, is reduced. Reduced noise emission also enhances controls reliability.

Volume 6 Number 6 November/December 1981 385

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     XEROX DISCLOSURE JOURNAL Volume 6 Number 6 November/December 1981

386

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