The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 24, 2007
Filed:
Jan. 10, 2006
Shigeru Furuki, Miyagi-ken, JP;
Shigeru Furuki, Miyagi-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A motor driving control device includes a motor, a switch unit that controls driving of the motor, a current detection resistor that outputs a detection voltage indicating a current of the motor, a comparator that compares the detection voltage with a target current value, an on signal generating unit that generates an on signal, a polarity of which is changed for each interval of predetermined time, and a control unit that has the comparator, a holding circuit receiving the on signal to change a circuit state. When a change in polarity of the on signal is detected, the holding circuit holds the circuit state such that the switch unit is turned on and a current is supplied to the motor. When the comparator detects that the current of the motor is increased to the target current value, the holding circuit holds the circuit state such that the switch unit is turned off.