Invention Grant
- Patent Title: MIGFET circuit with ESD protection
- Patent Title (中): MIGFET电路具有ESD保护
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Application No.: US11971591Application Date: 2008-01-09
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Publication No.: US07817387B2Publication Date: 2010-10-19
- Inventor: Michael G. Khazhinsky , Leo Mathew , James W. Miller
- Applicant: Michael G. Khazhinsky , Leo Mathew , James W. Miller
- Applicant Address: US TX Austin
- Assignee: Freescale Semiconductor, Inc.
- Current Assignee: Freescale Semiconductor, Inc.
- Current Assignee Address: US TX Austin
- Agent James L. Clingan, Jr.; Ranjeev Singh
- Main IPC: H02H9/00
- IPC: H02H9/00 ; H01L23/62

Abstract:
An electrostatic discharge (ESD) protected circuit is coupled to a power supply voltage rail and includes a multiple independent gate field effect transistor (MIGFET), a pre-driver, and a hot gate bias circuit. The MIGFET has a source/drain path coupled between an output pad and the power supply voltage rail and has a first gate terminal and a second gate terminal. The pre-driver circuit has an output. The hot gate bias circuit is coupled to the first gate terminal of the MIGFET, and the output of the pre-driver circuit is coupled to the second gate terminal of the MIGFET. The hot gate bias circuit is configured to apply a bias voltage to the first gate terminal of the MIGFET during an ESD event that increases the breakdown voltage of the MIGFET so as to better withstand the ESD event.
Public/Granted literature
- US20090174973A1 MIGFET CIRCUIT WITH ESD PROTECTION Public/Granted day:2009-07-09
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