Sawtooth wave generating circuit and switch mode power supply device having the same
    61.
    发明授权
    Sawtooth wave generating circuit and switch mode power supply device having the same 有权
    锯齿波发生电路和开关模式电源装置具有相同的功能

    公开(公告)号:US08890586B2

    公开(公告)日:2014-11-18

    申请号:US12489877

    申请日:2009-06-23

    申请人: Kyu-Young Chung

    发明人: Kyu-Young Chung

    IPC分类号: H03K4/06 H03K4/50

    CPC分类号: H03K4/50

    摘要: A sawtooth wave generating circuit that outputs a sawtooth wave signal after calibration and a switch mode power supply device including the sawtooth wave generating circuit is disclosed. The sawtooth wave generating circuit includes a capacitor, a calibration circuit, a charging circuit, discharging circuit and a control unit. The calibration circuit feedbacks a sawtooth wave signal, generates a plurality of voltage signals based on the sawtooth wave signal, and selects one of the voltage signals to generate a calibration output signal. Therefore, the sawtooth wave generating circuit generates a stable sawtooth wave signal regardless of operating conditions.

    摘要翻译: 公开了一种在校准后输出锯齿波信号的锯齿波发生电路和包括锯齿波产生电路的开关模式电源装置。 锯齿波发生电路包括电容器,校准电路,充电电路,放电电路和控制单元。 校准电路反馈锯齿波信号,基于锯齿波信号产生多个电压信号,并选择一个电压信号以产生校准输出信号。 因此,无论工作条件如何,锯齿波发生电路产生稳定的锯齿波信号。