Invention Grant
- Patent Title: Techniques for phase adjustment
- Patent Title (中): 相位调整技术
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Application No.: US12729114Application Date: 2010-03-22
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Publication No.: US08149038B1Publication Date: 2012-04-03
- Inventor: Chiakang Sung , John Henry Bui , Khai Nguyen , Bonnie I. Wang , Xiaobao Wang
- Applicant: Chiakang Sung , John Henry Bui , Khai Nguyen , Bonnie I. Wang , Xiaobao Wang
- Applicant Address: US CA San Jose
- Assignee: Altera Corporation
- Current Assignee: Altera Corporation
- Current Assignee Address: US CA San Jose
- Agent Steven J. Cahill
- Main IPC: H03H11/16
- IPC: H03H11/16

Abstract:
A dynamic phase alignment circuit includes a phase generator circuit having delay-locked loop circuits that generate periodic output signals. Each of the delay-locked loop circuits generates one of the periodic output signals in response to at least two periodic input signals. A multiplexer circuit selects a selected periodic signal from among the periodic input signals and the periodic output signals based on select signals. A phase detection circuit compares a phase of the selected periodic signal to a data signal to generate a phase detection signal. A control logic circuit generates the select signals. The control logic circuit adjusts the select signals based on changes in the phase detection signal to cause the multiplexer circuit to adjust the phase of the selected periodic signal.
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