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专利名称：PWM SIGNAL OUTPUT CIRCUIT发明人：Takashi Ogawa申请号：US13617484申请日：20120914
公开号：US20130113401A1公开日：20130509
专利附图：
摘要：A PWM-signal-output circuit includes a detecting unit to detect time periodsduring which a speed signal with logic level changing alternately and having a periodcorresponding to a motor-rotation speed is at one and the other logic levels; a
generating unit configured to, when the logic level of the speed signal changes, generate
a signal to increase and thereafter decrease a current flowing through a motor coil withina first time period detected by the detecting unit, in a second time period occurring afterthe first time period; and a second generating unit configured to, when the first timeperiod has elapsed after a change in the logic level of the speed signal but before asubsequent change in the logic level thereof in the second time period, generate thesignal from when the first time period has elapsed until when the logic level thereofchanges.
申请人：Takashi Ogawa
地址：Gifu-ken JP
国籍：JP
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