Invention Grant
US08115519B2 Phase accumulator generating reference phase for phase coherent direct digital synthesis outputs
有权
相位累加器产生相位相干直接数字合成输出的参考相位
- Patent Title: Phase accumulator generating reference phase for phase coherent direct digital synthesis outputs
- Patent Title (中): 相位累加器产生相位相干直接数字合成输出的参考相位
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Application No.: US12704840Application Date: 2010-02-12
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Publication No.: US08115519B2Publication Date: 2012-02-14
- Inventor: Steven E. Turner
- Applicant: Steven E. Turner
- Applicant Address: US NH Nashua
- Assignee: BAE Systems Information and Electronic Systems Integration Inc.
- Current Assignee: BAE Systems Information and Electronic Systems Integration Inc.
- Current Assignee Address: US NH Nashua
- Agency: Finch & Maloney, PLLC
- Agent Neil F. Maloney
- Main IPC: H03B21/00
- IPC: H03B21/00
Abstract:
A phase accumulator generates phase data for a direct digital synthesis (DDS) device based on a reference phase to provide analog sinusoidal outputs that are locked to the reference phase and thus phase coherent. The frequency of a sinusoidal DDS output may be controlled by changing a frequency control word (FCW) provided to the phase accumulator without affecting the incrementing reference phase. The sinusoidal DDS output is based on a multiple of the FCW and the reference phase and thus remains locked to the reference phase, providing phase coherency even when the FCW changes to change the frequency.
Public/Granted literature
- US20110199127A1 Phase Accumulator Generating Reference Phase for Phase Coherent Direct Digital Synthesis Outputs Public/Granted day:2011-08-18
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