Invention Grant
- Patent Title: Level shifter with output spike reduction
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Application No.: US12460442Application Date: 2009-07-17
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Publication No.: US08174303B2Publication Date: 2012-05-08
- Inventor: Tae Youn Kim , Robert Mark Englekirk , Dylan J. Kelly
- Applicant: Tae Youn Kim , Robert Mark Englekirk , Dylan J. Kelly
- Applicant Address: US CA San Diego
- Assignee: Peregreine Semiconductor Corporation
- Current Assignee: Peregreine Semiconductor Corporation
- Current Assignee Address: US CA San Diego
- Agency: Jaquez & Associates
- Agent Martin J. Jaquez, Esq.; William C. Boling, Esq.
- Main IPC: H03L5/00
- IPC: H03L5/00

Abstract:
A level shifter, or method, producing a final output from a driver supplied by a high-side source driver providing VDD or common, and a low-side source driver providing common or VSS. A delay is introduced to prevent a source driver output at common from beginning to transition toward a supply rail until a delaying source driver at a rail begins transitioning toward common. The level shifter may be single-ended or differential, and the delaying source driver may be coupled to the same final output driver as is the delayed source driver, or may be coupled to a different final output driver. The level shifter may have a second level shifter front end stage, which may have high-side and low-side intermediate source driver outputs coupled by a capacitor, and/or may couple one of the supplies to all intermediate source drivers via a common impedance or current limit Zs.
Public/Granted literature
- US09030248B2 Level shifter with output spike reduction Public/Granted day:2015-05-12
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