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    • 14. 发明专利
    • Output switching circuit
    • 输出开关电路
    • JP2012054626A
    • 2012-03-15
    • JP2010193164
    • 2010-08-31
    • Fujitsu Semiconductor Ltd富士通セミコンダクター株式会社
    • WAKII TAKESHIYOSHIOKA AKIHIOTO
    • H03F3/217
    • H02M3/158H02M3/1588H03K17/6872Y02B70/1466
    • PROBLEM TO BE SOLVED: To provide an output switching circuit that reduces the scale of an analog circuit as much as possible.SOLUTION: An output switching circuit 1 has: a switching circuit 30 having a first transistor 31 connected to a high power supply and a second transistor 32 connected to a low power supply, and that uses a connection node between the first and second transistors 31 and 32 as an output terminal 33; a comparison unit 10 that compares a feedback signal FB obtained by feeding an output signal Vo from the output terminal 33 back via a low-pass filter 40 with an input signal In to generate a comparison signal Vcomp; and a driving pulse generation unit 20 that generates first and second driving pulses Vp and Vn for driving the first and second transistors 31 and 32 depending on the comparison signal Vcomp.
    • 要解决的问题:提供尽可能减小模拟电路规模的输出开关电路。 解决方案:输出开关电路1具有:开关电路30,其具有连接到高电源的第一晶体管31和连接到低电源的第二晶体管32,并且其使用第一和第二 晶体管31和32作为输出端33; 比较单元10,其比较通过经由低通滤波器40将来自输出端子33的输出信号Vo反馈到输入信号In而获得的反馈信号FB,以产生比较信号Vcomp; 以及驱动脉冲生成单元20,其根据比较信号Vcomp产生用于驱动第一和第二晶体管31和32的第一和第二驱动脉冲Vp和Vn。 版权所有(C)2012,JPO&INPIT