Method of regulating a target system using a frequency...

Details Method of regulating a target system using a frequency... Method of regulating a target system using a frequency...

2006-09-05

2006-09-05

Picard, Leo (Department: 2125)

Data processing: generic control systems or specific application

Generic control system, apparatus or process

Having specific error signal generation

C700S040000, C700S042000, C318S610000

Reexamination Certificate

active

07103425

ABSTRACT:
A method of regulating a target system generates a plurality of digital signals which define a reference pulse train with a frequency dependent upon a reference signal. A target system to be regulated (such as a transport speed of a paper transport assembly in a printer) has an output in the form of a plurality of digital signals defining a feedback pulse train having a frequency. The frequency of the reference pulse train is compared with the frequency of the feedback pulse train. A control signal is generated dependent upon the frequency comparison, and is provided as an input to the target system.

REFERENCES:
patent: 4494509 (1985-01-01), Long
patent: 5212434 (1993-05-01), Hsieh
patent: 6043695 (2000-03-01), O'Sullivan
Jung-Chien Li and Guan-Chyun Hsieh “A Phase/Frequency-Locked Controller for Stepping Servo Control Systems” IEEE Transactions on Industrial Electronics, vol. 39,No. 2, Apr. 1992, pp. 112-119.
Motorola MC4344/MC4044 Phase Frequency Detector brochure, pp. 6-20-6-37.

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