Power supply noise cancelling circuit and power supply noise cancelling method
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United States of America Patent
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Jan 19, 2016
Grant Date -
Sep 17, 2015
app pub date -
Mar 13, 2015
filing date -
Mar 14, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
According to an embodiment, a power supply noise cancelling circuit includes a generator, a first multiplier, a subtractor and a digital-to-analog converter. The generator generates a sine wave signal. The first multiplier multiplies a digital input signal by a digital signal based on the sine wave signal to generate a first digital product signal. The subtractor subtracts a digital signal based on the first digital product signal from the digital input signal to generate a digital difference signal. The digital-to-analog converter performs a digital-to-analog conversion on the digital difference signal to obtain an analog output signal.
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