Electricity: motive power systems – Positional servo systems – Pulse-width modulated power input to motor
Reexamination Certificate
2006-11-28
2006-11-28
Ip, Paul (Department: 2837)
Electricity: motive power systems
Positional servo systems
Pulse-width modulated power input to motor
C318S254100, C318S434000, C388S811000
Reexamination Certificate
active
07141950
ABSTRACT:
A system and method for bi-directional communication between a system controller and a fan controller: The system operates in two modes and there are two communication paths between the system controller and the fan controller. The first communication path provides a PWM signal the frequency of which indicates the mode in which the system is operating. During the first mode, the duty cycle of the PWM signal on the first signal path indicates the desired fan speed. In the first mode, the second communication path carries a conventional tachometer signal. In the second mode the second communication path operates as a bi-directional communications signal path between said system controller and said fan controller.
REFERENCES:
patent: 4328586 (1982-05-01), Hansen
patent: 5003457 (1991-03-01), Ikei et al.
patent: 5399926 (1995-03-01), Adams et al.
patent: 5617282 (1997-04-01), Rall et al.
patent: 5902180 (1999-05-01), Sunaga et al.
patent: 6381406 (2002-04-01), Smith et al.
patent: 6553076 (2003-04-01), Huang
patent: 6567476 (2003-05-01), Kohl et al.
patent: 6597972 (2003-07-01), Emberty et al.
patent: 2001/0031026 (2001-10-01), Kohl et al.
patent: 2002/0120367 (2002-08-01), Emberty et al.
patent: 2003/0143964 (2003-07-01), Otsuka et al.
patent: 2004/0139181 (2004-07-01), Baril et al.
patent: 2004/0158333 (2004-08-01), Ha et al.
patent: 2004/0243684 (2004-12-01), Ha et al.
Atmel;AVR442: PC Fan Control Using ATtiny 13; Sep. 2005; pp. 1-10.
Microchip Technology;Fan Control Function Pack Design Guide; Aug. 2005; pp. 1-8.
Zilog;Intelligent Fan Controller Solutions; Jun. 2005; pp. 1-2.
Cyth Systems;Engineering Solutions for Manufacturing and Research; 2004; pp. 1-3.
Miro Oljaca;Meet Demanding Specs of Control Systems; pp. 1-3.
Cypress Semiconductor Corp.
Ip Paul
Marger & Johnson & McCollom, P.C.
LandOfFree
Fan control utilizing bi-directional communication does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fan control utilizing bi-directional communication, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fan control utilizing bi-directional communication will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3641852