发明名称 |
SPREAD SPECTRUM CLOCK SIGNAL GENERATION SYSTEM AND METHOD |
摘要 |
<p>A system and method for generating a clock signal having spread spectrum modulation. The method involves generating a clock signal by generating edge positions for edges of the clock signal from a digital representation of a timing for each edge to impart spread spectrum modulation to the clock signal. A programmable modulator is provided that generates digital values representing edge positions for edges of a clock signal based on at least one of a time-varying period value and a time-varying duty-cycle value. The programmable modulator may comprise a first circuit, called a period modulation circuit, that generates a time-varying digital period value, and a second circuit, called a duty-cycle modulation circuit, that generates a time-varying digital duty-cycle value. The time-varying period values and time-varying duty cycle values are processed to produce a digital edge position value that specifies an edge position for a clock signal. The programmable modulator is coupled to an arbitrary waveform synthesizer that generates timing for edges of the clock signal based on the edge position values. A variety of modulations can be imposed on the clock signal using these techniques, including triangle wave modulation, near-triangle modulation, random and pseudo-random modulation.</p> |
申请公布号 |
WO2006044586(A2) |
申请公布日期 |
2006.04.27 |
申请号 |
WO2005US36918 |
申请日期 |
2005.10.12 |
申请人 |
TIMELAB CORPORATION;CARLEY, ADAM, L.;ALLEN, DANIEL, J. |
发明人 |
CARLEY, ADAM, L.;ALLEN, DANIEL, J. |
分类号 |
H04B1/69 |
主分类号 |
H04B1/69 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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