Electrostatic discharge protection circuit
A technology for electrostatic discharge protection and circuits, applied in emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, circuits, etc., can solve problems such as large area and susceptibility to noise, and achieve small area , Avoid noise influence, the effect of small RC time constant
Active Publication Date: 2022-05-27
CHANGXIN MEMORY TECH INC
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Problems solved by technology
[0004] Based on this, it is necessary to provide an electrostatic discharge protection circuit for the problem that the electrostatic discharge protection circuit in the prior art has a large area and is easily affected by noise
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[0031] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the related drawings. Preferred embodiments of the present application are shown in the accompanying drawings. However, the application may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
[0032] It should be noted that when an element is referred to as being "connected" to another element, it can be directly connected to and integrated with the other element, or intervening elements may also be present. The terms "installed," "one end," "the other end," and similar expressions used herein are for illustrative purposes only.
[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technica...
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The invention relates to an electrostatic discharge protection circuit, comprising: a pulse detection unit, the first end of which is connected to the first voltage, the second end is connected to the second voltage, and the third end outputs a pulse detection signal; a delay unit, the first end of which is connected to the second voltage A voltage, the second terminal is connected to the second voltage, the third terminal is connected to the third terminal of the pulse detection unit, the fourth terminal outputs the first delayed signal, and the fifth terminal outputs the second delayed signal; the first terminal of the control unit is connected to the second A voltage, the second terminal is connected to the second voltage, the third terminal is connected to the fifth terminal of the delay unit, the fourth terminal is connected to the fourth terminal of the delay unit, and the fifth terminal outputs a control signal; the first terminal of the discharge unit is connected to the fifth terminal A voltage, the second terminal is connected to the second voltage, and the third terminal is connected to the fifth terminal of the control unit. The application has a small RC time constant on the premise of achieving the required electrostatic protection effect, and the electrostatic discharge protection circuit has a small area and does not occupy much design space.
Description
technical field [0001] The present application relates to the technical field of integrated circuits, and in particular, to an electrostatic discharge protection circuit. Background technique [0002] Now the semiconductor process is getting more and more advanced, the semiconductor devices are getting smaller and smaller, the junction depth is getting shallower and the oxide layer is getting thinner and thinner, and the reliability of semiconductor integrated circuits is facing increasing challenges, especially Electrostatic protection is becoming more and more important. According to statistics, the failure of many semiconductor products is caused by electrostatic damage. In order to better protect the integrated circuit from electrostatic damage, it is necessary to set an electrostatic discharge protection circuit to protect the integrated circuit. [0003] Conventional integrated circuit products are usually designed with electrostatic protection. Usually, all lead-out...
Claims
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IPC IPC(8): H01L27/02
CPCH01L27/0285H03K17/08104H02H3/046H01L27/0266H01L27/0288H02H9/045
Inventor 许杞安
Owner CHANGXIN MEMORY TECH INC