Invention Grant
- Patent Title: Electrostatic discharge circuit and method
- Patent Title (中): 静电放电电路及方法
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Application No.: US12332651Application Date: 2008-12-11
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Publication No.: US08238067B2Publication Date: 2012-08-07
- Inventor: Oleg Drapkin , Grigori Temkin , Peter Bade
- Applicant: Oleg Drapkin , Grigori Temkin , Peter Bade
- Applicant Address: CA Markham, Ontario
- Assignee: ATI Technologies ULC
- Current Assignee: ATI Technologies ULC
- Current Assignee Address: CA Markham, Ontario
- Agency: Faegre Baker Daniels LLP
- Main IPC: H02H9/00
- IPC: H02H9/00

Abstract:
A method and integrated circuit renders a shunt structure non-conductive during a power up event or noise event for and in addition, during an electrostatic discharge event, keeps the shunt structure conductive for a period of time to discharge electrostatic energy through the shunt structure. In one example, a shunt structure, such as a transistor, is interposed between a power node and a ground node. Circuitry is operative during a power up event or noise event, to render the shunt structure non-conductive for a period of time during the power up event or during the noise event (when power is applied). Second circuit is operative, during an electrostatic discharge event, to keep the shunt structure conductive for a period of time to discharge electrostatic energy through the shunt structure. In one example, a plurality of resistor/capacitors (RC) circuits are utilized wherein the RC circuits have different time constants. In addition, an ESD feedback circuit is employed in conjunction with control logic to suitably control the ESD control logic during an ESD event. Circuitry is also used during a power up event to render the shunt structure non-conductive.
Public/Granted literature
- US20100149701A1 ELECTROSTATIC DISCHARGE CIRCUIT AND METHOD Public/Granted day:2010-06-17
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