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Browse Prior Art Database

A METHOD FOR CONTINUOUS DUTY-CYCLE MEASUREMENT

IP.com Disclosure Number: IPCOM000014230D
Original Publication Date: 1999-Dec-01
Included in the Prior Art Database: 2003-Jun-19

Publishing Venue

IBM

Related People

Authors:
Bob Faust Bill Beebe Joel Goodwin Michael Barenys

Abstract

Microcontrollers are self-contained computer chips that can read external signals and states, and transmit commands and information. They are embedded in devices large and small for the purpose of human interface, data gathering, and automatic control. Reading, processing, and displaying state or status information is one of many important roles for embedded controllers, as they are called. Embedded controllers are usually very limited in the amount of on-board random access memory (ram) they contain. Ram is the memory used for variable and computational data. A PROBLEM An embedded controller application continuously sampled a number of signal lines to determine the percentage of time each line was active. Another name for this time percentage is "duty-cycle".