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    • 26. 发明授权
    • Circuit and method for detecting a voltage change
    • 用于检测电压变化的电路和方法
    • US07859421B2
    • 2010-12-28
    • US12361259
    • 2009-01-28
    • Joerg BertholdChristian PachaArtur Wroblewski
    • Joerg BertholdChristian PachaArtur Wroblewski
    • G08B21/00H03B1/00H03B5/24H03K3/03
    • G01R19/16552
    • A circuit arrangement for detecting voltage changes, comprising supply terminals configured to apply a first potential and a second potential, a first oscillator and a second oscillator, which are operated with the first potential and the second potential, a voltage dependence of the frequency of the first oscillator differing from a voltage dependence of the frequency of the second oscillator, a first evaluation circuit configured to evaluate the frequency of the first oscillator and a second evaluation circuit configured to evaluate the frequency of the second oscillator, and a comparison circuit configured to compare a value based on the evaluated frequencies of the first oscillator and of the second oscillator with a predetermined threshold value, and to output a voltage change signal indicating an impermissible voltage change between the first potential and the second potential depending on the result of the comparison.
    • 一种用于检测电压变化的电路装置,包括被配置为施加第一电位和第二电位的电源端子,第一振荡器和第二振荡器,其以第一电位和第二电位运行,电压依赖性 第一振荡器与第二振荡器的频率的电压依赖性不同,被配置为评估第一振荡器的频率的第一评估电路和被配置为评估第二振荡器的频率的第二评估电路,以及配置为比较第二振荡器的比较电路 基于第一振荡器和具有预定阈值的第二振荡器的估计频率的值,并且根据比较结果输出表示第一电位和第二电位之间的不允许电压变化的电压变化信号。