Title:
直流モータのモータ回転パルス生成回路およびその回路を用いた挟み込み検知装置
Document Type and Number:
Japanese Patent JP4244412
Kind Code:
B2
Abstract:
A device for determining a rotational number of an electric dc motor which drives a moving body of an automobile accessory such a sunroof, or a glass pane of a power window includes a switched capacitance filter for eliminating noise from the motor, a cutoff frequency of the switched capacitance filter being dependent on a clock input thereof; a pulse shaping circuit for generating a ripple pulse signal indicative of the rotational number of the motor by wave-shaping an output of the switched capacitance filter; and a pulse generating circuit providing an output pulse signal so as to establish a condition wherein the frequency of the ripple pulse signal is equalized to the cutoff frequency of the a switched capacitance filter.
Inventors:
Toshimitsu Oka
Aoki Koji
Hideyuki Kanie
Hitoshi Ishikawa
Aoki Koji
Hideyuki Kanie
Hitoshi Ishikawa
Application Number:
JP27839498A
Publication Date:
March 25, 2009
Filing Date:
September 30, 1998
Export Citation:
Assignee:
Aisin Seiki Co., Ltd.
International Classes:
B60J1/00; H03L7/00; B60J1/17; B60J7/057; G01P3/48; G01P3/483; H02P7/06
Domestic Patent References:
| JP567496U |