公开(公告)号：US20020195882A1

公开(公告)日：2002-12-26

申请号：US10236256

申请日：2002-09-04

Applicant: STMicroelectronics S.r.I.

Inventor： Filippo Marino

IPC: H02J009/00

CPC classification number: H02M1/32 ,  Y10T307/625 ,  Y10T307/826 ,  Y10T307/858 ,  Y10T307/865

Abstract: The method of a protection circuit includes a reference voltage source and at least one circuit which are connected together via a switch. A memory element is connected to the input of the circuit, downstream of the switch. The switch is temporarily opened by a control signal generated by a monostable circuit when detecting switching of power elements belonging to an electronic device embedding the protection circuit. When the switch is open, the memory element supplies the circuit with the reference voltage previously stored. In this way, switching of the power element that might cause noise on the reference voltage cannot disturb the circuit and thereby cannot cause a faulty operation of the latter.

Abstract translation: 保护电路的方法包括参考电压源和经由开关连接在一起的至少一个电路。 存储器元件连接到电路的输入端，在开关的下游。 当检测属于嵌入保护电路的电子设备的功率元件的切换时，开关由单稳电路产生的控制信号暂时打开。 当开关断开时，存储元件为电路提供预先存储的参考电压。 以这种方式，可能导致噪声的功率元件在参考电压上的切换不会干扰电路，从而不会导致电路的故障。