Invention Application
- Patent Title: VOL UP-SHIFTING LEVEL SHIFTERS
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Application No.: US12871343Application Date: 2010-08-30
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Publication No.: US20120050930A1Publication Date: 2012-03-01
- Inventor: Chan-Hong CHERN , Fu-Lung HSUEH , Yuwen SWEI , Chih-Chang LIN
- Applicant: Chan-Hong CHERN , Fu-Lung HSUEH , Yuwen SWEI , Chih-Chang LIN
- Applicant Address: TW Hsin-Chu
- Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
- Current Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
- Current Assignee Address: TW Hsin-Chu
- Main IPC: H02H9/04
- IPC: H02H9/04 ; H03L5/00

Abstract:
A representative level-shifter comprises a dynamically biased current source circuit that receives a first voltage, a first and a second unidirectional current-conducting devices, a first and a second pull-down devices, and a pull-up device. The first and second unidirectional current-conducting devices are coupled to the dynamically biased current source circuit. A voltage output of the level-shifter is located at a first node that is located between the current-constant circuit and the second unidirectional current-conducting device. The first and second pull-down devices are coupled to the first and second unidirectional current-conducting devices, respectively. The pull-up device receives a second voltage and is coupled to the dynamically biased current source circuit and the first unidirectional current-conducting device. The pull-up device is configured to dynamically bias the dynamically biased current source circuit such that a voltage drop of the second unidirectional current-conducting device is output at the voltage output responsive to the pull-up device outputting the second voltage to the dynamically biased current source circuit, the first pull-down device being non-conducting and the second pull-down device being conducting.
Public/Granted literature
- US08207775B2 VOL up-shifting level shifters Public/Granted day:2012-06-26
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