Title:
PWM CONTROL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2004/109901
Kind Code:
A1
Abstract:
A PWM control system includes: PWM basic wave generation means (12) for forming a PWM basic wave by dividing a basic frequency signal; PWM cycle setting means (22) for setting a PWM cycle according to the PWM basic wave; duty ratio formation means (24) for forming a duty ratio within the PWM cycle (N/M: N ≤ M, wherein M is the largest clock number); and PWM control signal output means for outputting the PWM control signal having the duty ratio to a load drive circuit.
Inventors:
TAKEUCHI KESATOSHI (JP)
Application Number:
PCT/JP2004/007602
Publication Date:
December 16, 2004
Filing Date:
June 02, 2004
Export Citation:
Assignee:
SEIKO EPSON CORP (JP)
TAKEUCHI KESATOSHI (JP)
TAKEUCHI KESATOSHI (JP)
International Classes:
H02M7/48; H03K7/08; (IPC1-7): H02M7/48
Foreign References:
| JP2002017089A | 2002-01-18 | |||
| JP2000066702A | 2000-03-03 | |||
| JPS6074972A | 1985-04-27 |
Other References:
See also references of EP 1630944A4
Attorney, Agent or Firm:
Inaba, Yoshiyuki (Roppongi Hills Mori Tower 6-10-1, Roppongi, Minato-k, Tokyo 23, JP)
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