Invention Grant
- Patent Title: Balanced level shifter with wide operation range
- Patent Title (中): 平衡电平转换器,工作范围宽
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Application No.: US13769406Application Date: 2013-02-18
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Publication No.: US08791743B1Publication Date: 2014-07-29
- Inventor: Bo Tang , Huaimin Li , Ajay Kumar Bhatia
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.
- Main IPC: H03L5/00
- IPC: H03L5/00

Abstract:
Embodiments of an apparatus are disclosed that may allow for the translation of signals from one power domain to another with well-balanced rise and fall times over a wide operational range. The apparatus may include an input buffer, a voltage shift circuit, and output circuit, and an output driver. The input buffer may be configured to generate a buffered version and delayed inverted version of an external signal at a first voltage level. The voltage shift circuit may be configured to generate two internal signals at a second voltage level dependent upon the output signals of the input buffer. The output circuit may be configured to generate two output driver signals at the second voltage level dependent upon the output signals of the voltage shift circuit. The output driver circuit may be configured to generate an output signal at the second voltage level dependent on the two output driver signals.
Public/Granted literature
- US20140232445A1 BALANCED LEVEL SHIFTER WITH WIDE OPERATION RANGE Public/Granted day:2014-08-21
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