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DOUBLE QUADRATURE WITH ADAPTIVE PHASE SHIFT FOR IMPROVED PHASE REFERENCE PERFORMANCE
DOUBLE QUADRATURE WITH ADAPTIVE PHASE SHIFT FOR IMPROVED PHASE REFERENCE PERFORMANCE
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机译:具有自适应相移的双正交可改善相参考性能
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摘要
A method for correcting a timing error in a test and measurement instrument. The method includes receiving a clock signal at each of four samplers. The first clock signal is sampled at the first sampler at a first phase, the second clock signal is sampled at the second sampler at a second phase that is 90 degrees offset from the first phase, the third clock signal is sampled at the third sampler at a third phase that is 45 degrees offset from the first phase, and the fourth clock signal is sampled at the fourth sampler at a fourth phase that is 90 degrees offset from the third phase. Each of the outputs from the samplers are digitized and a timing correction is calculated based on the digitized outputs from the digitized outputs.
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