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Electrostatic discharge protector circuit

An electrostatic discharge protection and circuit technology, applied in emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, circuit devices, etc., can solve problems such as destroying power saving mode and short circuit

Inactive Publication Date: 2003-03-19
MACRONIX INT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above voltage sequence will increase the difficulty of IC design, such as figure 2 As shown, during the power saving mode, when the voltage source Vcci independently stops inputting to save power, the current input from the voltage source Vcco will pass through the ESD protection circuit 205 (eg image 3 shown) flows to the voltage source Vcci, so the voltage source Vcci also has a voltage input, so if the voltage sequence is disturbed by noise, the current may flow from a voltage input line to a power saving line, causing a short circuit or destroying the power saving mode the goal of

Method used

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Embodiment Construction

[0027] The ESD protection circuit according to the preferred embodiment of the present invention will be described below with reference to the related drawings, wherein the same components will be described with the same reference numerals.

[0028] refer to Figure 4 As shown, the ESD protection circuit 4 according to the preferred embodiment of the present invention includes a resistive element 41 , a capacitive element 42 and a PMOS element 43 . In this embodiment, one end of the resistance element 41 is electrically connected to a voltage source Vcc, one end of the capacitance element 42 is electrically connected to the other end of the resistance element 41, and the other end of the capacitance element 42 is grounded, and the PMOS element 43 is a four-terminal element. It includes a gate 431, a first electrode 432, a second electrode 433 and a base 434, the gate 431 of the PMOS element 43 is electrically connected between the resistance element 41 and the capacitance elemen...

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Abstract

The electrostatic discharge protector circuit includes one resistor element, one capacitor element and one PMOS device. The resistor element and the capacitor element are connected serially between the power source and the ground; the PMOS device has grid connected to the joint between the resistor element and the capacitor element and base connected to its first electrode and power source; and the RC time constant of the resistor element and the capacitor element is 0.1-10 microsecond to distinguish the electrostatic voltage and working voltage. The present invention also provides one multiple electrostatic discharge protector circuit with separate power sources and one electrostatic discharge protector circuit assembly.

Description

technical field [0001] The invention relates to an electrostatic discharge protection circuit, in particular to an electrostatic discharge protection circuit with multiple separate voltage sources capable of distinguishing working voltage and electrostatic voltage according to the rising time of the voltage. technical background [0002] Electrostatic protection is one of the important areas in integrated circuits. Since static electricity is usually accompanied by a considerable voltage (maybe tens of thousands of volts), it is known to use an electrostatic discharge (ESD) protection circuit to protect the chip from being damaged by static electricity. [0003] In addition, logic judgments are often included in the chip, which requires multiple voltage sources to operate, and the voltage sources are of different voltage values. For example, a microprocessor chip may include magnetic core logic, which operates at 2.5 volts. Actuation, and the voltag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/00
Inventor 刘孟煌赖纯祥苏醒卢道政
Owner MACRONIX INT CO LTD
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