专利内容由知识产权出版社提供
专利名称：Apparatus for driving electric load发明人：Hiroshi Imai,Yoshiki Koyama,Shunji Mase申请号：US09384223申请日：19990827公开号：US06184663B2公开日：20010206
专利附图：
摘要：An apparatus for driving an electric load includes a switch device interposed in acurrent feed path from a direct-current power source to the electric load. A sensingresistor connected in series with the switch device operates for detecting a load currentas a voltage value. The load current flows into the electric load via the switch device. A
signal generation device operates for generating a trapezoidal wave signal in response toexternally applied commands to turn on and turn off the electric load. The trapezoidalwave signal gradually varies from a first predetermined voltage to a second
predetermined voltage when the electric load starts to be turned on. The trapezoidalwave signal gradually varies from the second predetermined voltage to the firstpredetermined voltage when the electric load starts to be turned off. A control deviceoperates for comparing the trapezoidal wave signal generated by the signal generationdevice and the voltage value provided by the sensing resistor, and for controlling theswitch device in response to a result of the comparing so that the load current will vary inaccordance with the trapezoidal wave signal.
代理机构：Pillsbury Madison & Sutro LLP
更多信息请下载全文后查看