Power supply noise cancelling circuit and power supply noise cancelling method

摘要

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.

主权项

1. A power supply noise cancelling circuit, comprising:
a generator that generates a sine wave signal; a first multiplier that multiplies a digital input signal by a digital signal based on the sine wave signal to generate a first digital product signal; a subtractor that subtracts a digital signal based on the first digital product signal from the digital input signal to generate a digital difference signal; and a digital-to-analog converter that performs a digital-to-analog conversion on the digital difference signal to obtain an analog output signal.