Invention Grant
- Patent Title: Common mode voltage level shifting and locking circuit
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Application No.: US16719998Application Date: 2019-12-19
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Publication No.: US10972079B2Publication Date: 2021-04-06
- Inventor: Wen-Wei Chen
- Applicant: IC Plus Corp.
- Applicant Address: TW Hsin-Chu
- Assignee: IC Plus Corp.
- Current Assignee: IC Plus Corp.
- Current Assignee Address: TW Hsin-Chu
- Agency: JCIPRNET
- Priority: TW108115302 20190502
- Main IPC: H03L5/00
- IPC: H03L5/00 ; H03K3/0233

Abstract:
A common mode voltage level shifting and locking circuit is provided. The common mode voltage level shifting and locking circuit includes an operational amplifier, a source follower, a first feedback circuit, and a second feedback circuit. The operational amplifier generates a first common mode voltage. The source follower shifts the first common mode voltage to generate a second common mode voltage. The first feedback circuit generates a first control signal according to the second common mode voltage. The operational amplifier adjusts the first common mode voltage according to the first control signal. The second feedback circuit generates a second control signal according to an external reference voltage provided by a next stage circuit. The source follower adjusts the second common mode voltage according to the second control signal such that the next stage circuit reaches a maximum input common mode range.
Public/Granted literature
- US20200350897A1 COMMON MODE VOLTAGE LEVEL SHIFTING AND LOCKING CIRCUIT Public/Granted day:2020-11-05
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