公开(公告)号：US20040160311A1

公开(公告)日：2004-08-19

申请号：US10782550

申请日：2004-02-18

Applicant: STMicroelectronics S.A.

Inventor： William Orlando ,  Jean Nicolai

IPC: H03D003/24

CPC classification number: G06F21/725 ,  G06F21/10 ,  G06F2221/2135 ,  G06F2221/2137

Abstract: An electronic circuit comprising a first counter clocked by a clock signal provided to have a first period and provided by an oscillator external to the circuit, and comprising a second counter clocked with a second period by an oscillator internal to the circuit, the second counter being reset each time the content of the first counter is a multiple of a first predetermined value, and a means for activating an alert signal when the second counter reaches a second predetermined value such that the product of the second predetermined value by the second period is greater than the product of the first predetermined value by the first period.

Abstract translation: 一种电子电路，包括由提供为具有第一周期并由电路外部的振荡器提供的时钟信号时钟的第一计数器，并且包括由电路内部的振荡器以第二周期计时的第二计数器，第二计数器 每当第一计数器的内容是第一预定值的倍数时复位，以及用于当第二计数器达到第二预定值时激活警报信号的装置，使得第二预定值乘第二周期的乘积更大 比第一个预定值乘以第一个周期的乘积。