Title:
パルス幅変調信号生成回路
Document Type and Number:
Japanese Patent JP5488074
Kind Code:
B2
Abstract:
A triangular wave generator in a pulse width modulation signal generator to generate a triangular wave signal and a pair of pulse signals. The first pulse signal is pulsed for a given duration of time when the triangular wave signal reaches a minimum limit thereof. The second pulse signal is pulsed for a given duration of time when the triangular wave signal reaches a maximum limit thereof. The voltage comparator generates a first pulse width modulation signal by comparing the triangular wave signal with an externally supplied direct current signal. The wave shaping circuit generates a second pulse width modulation signal by removing chattering components occurring immediately after rising and falling edges of the first pulse width modulation signal with a masking signal generated based on the first and second pulse signals and the first pulse width modulation signal.
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Inventors:
Yasuo Ueda
Application Number:
JP2010056918A
Publication Date:
May 14, 2014
Filing Date:
March 15, 2010
Export Citation:
Assignee:
株式会社リコー
International Classes:
H03K7/08; H03F3/217
Domestic Patent References:
| JP1197989A | ||||
| JP2003110412A |
Attorney, Agent or Firm:
Hideo Takino