Abstract
Digital power amplifier is a will input analog audio signals or PCM digital information transform into PWM or PDM pulse signal, and then use the pulse signal PWM or PDM to control the power switch device links/broken audio power amplifier, also called switch amplifier. It has high efficiency, small volume, low distortion advantages. Digital power amplifier including pulse width modulation (PWM) and output level two parts. The traditional sampling processing operation is very complex and hardware realization cost is high, as well as difficult. This paper will analyze the midpoint sampling and give it a simulation. This algorithm does not have multiply and divide operations, only including addition and subtraction , greatly reduced the hardware consumption. It accords with today's low cost and low power development trend.
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