公开(公告)号：US20020079933A1

公开(公告)日：2002-06-27

申请号：US10034969

申请日：2001-12-21

Applicant: STMicroelectronics S.A.

Inventor： Hubert Degoirat ,  Mathieu Lisart

IPC: H03K005/153

CPC classification number: G01R19/1659 ,  G01R19/16519

Abstract: The disclosure relates to detectors of the level of supply voltage in an integrated circuit. The disclosed detector is designed to detect the crossing of low levels of supply voltage. It comprises a first arm to define a first reference voltage and a second arm to define a second reference voltage, these two reference voltages varying differently as a function of the supply voltage and their curves of variation intersecting for a value of the supply voltage located close to a desired threshold. A comparator receives the two reference voltages. The first arm has a resistive divider bridge, an intermediate connector of which constitutes the first reference voltage. The second arm comprises a resistor series-connected with a native P type MOS transistor, the point of junction of this resistor and this transistor constituting the second reference voltage. A non-linear element may be parallel-connected to the resistor which constitutes the first reference voltage.

Abstract translation: 本公开涉及集成电路中电源电压电平的检测器。 所公开的检测器被设计为检测低电平电平的交叉。 它包括第一臂以限定第一参考电压和第二臂以限定第二参考电压，这两个参考电压作为电源电压的函数而变化，并且它们的变化曲线与位于关闭处的电源电压的值相交 达到期望的阈值。 比较器接收两个参考电压。 第一臂具有电阻分压器桥，其中间连接器构成第一参考电压。 第二臂包括与天然P型MOS晶体管串联连接的电阻器，该电阻器的该结点与该晶体管构成第二参考电压。 非线性元件可以并联连接到构成第一参考电压的电阻器。