Invention Grant
- Patent Title: Digital PLL with automatic clock alignment
- Patent Title (中): 数字PLL与自动时钟对齐
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Application No.: US13164096Application Date: 2011-06-20
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Publication No.: US08373472B2Publication Date: 2013-02-12
- Inventor: Edwin Thaller , Stefano Marsili , Giuseppe Li Puma
- Applicant: Edwin Thaller , Stefano Marsili , Giuseppe Li Puma
- Applicant Address: DE Neubiberg
- Assignee: Intel Mobile Communications GmbH
- Current Assignee: Intel Mobile Communications GmbH
- Current Assignee Address: DE Neubiberg
- Agency: Eschweller & Associates, LLC
- Main IPC: H03L7/06
- IPC: H03L7/06

Abstract:
One embodiment of the present invention relates to a digital phase locked loop (ADPLL) configured to generate a plurality of time-aligned output clock signals having different frequency values. The ADPLL comprises a digital controlled oscillator configured to generate a variable clock signal that is separated into two signal paths operating according to two separate clock domains. A first signal path is configured to generate a feedback signal that synchronizes the variable clock signal with a reference signal. A second signal path comprises a clock divider circuit configured to synchronously divide the variable clock signal to automatically generate a plurality of time-aligned output clock signals having different frequencies. A clock aligner monitors a phase difference between the variable clock signal and one of the plurality of time-aligned output clock signals and generates a control signal that causes a programmable delay line to automatically time-align the output clock signals with the variable clock signal.
Public/Granted literature
- US20120319749A1 DIGITAL PLL WITH AUTOMATIC CLOCK ALIGNMENT Public/Granted day:2012-12-20
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