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    • 1. 发明授权
    • Method of and circuit for brown-out detection
    • 欠压检测方法和电路
    • US08786297B2
    • 2014-07-22
    • US13264150
    • 2009-04-28
    • Joel TurchiKarel PtacekRadim Mlcousek
    • Joel TurchiKarel PtacekRadim Mlcousek
    • G01R31/00G01R19/165
    • G01R19/16538
    • A circuit and method for detecting a brown-out condition and providing a feed-forward transfer function in a power supply circuit. A comparison circuit is coupled to a delay element through a latch. A second delay element is connected between the first delay element and an input of the latch. The output of the first delay element is connected to a clamping circuit via a logic circuit. A first voltage is compared with a reference voltage to generate a comparison voltage, which is transmitted through the latch and the first delay element. The comparison voltage is monitored at an output of the first delay element. A brown-out condition occurs if the comparison voltage being monitored at the output of the first delay element results from the first voltage being less than the reference voltage.
    • 一种用于检测欠压状态并在电源电路中提供前馈传递功能的电路和方法。 比较电路通过锁存器耦合到延迟元件。 第二延迟元件连接在第一延迟元件和锁存器的输入端之间。 第一延迟元件的输出通过逻辑电路连接到钳位电路。 将第一电压与参考电压进行比较,以产生通过锁存器和第一延迟元件传输的比较电压。 在第一延迟元件的输出处监视比较电压。 如果在第一延迟元件的输出处监视的比较电压由第一电压小于参考电压导致,则出现欠压条件。