Invention Grant
US08773297B2 System and method for pulse width modulation digital-to-analog converter 有权
脉宽调制数模转换器的系统和方法

System and method for pulse width modulation digital-to-analog converter
Abstract:
A system and method is disclosed for a digital to analog converter which includes an interpolation filter to up-sample a digital signal, a noise shaping modulator to suppress in-band quantization errors due to digital pulse width modulation and truncation errors, and a hybrid finite impulse response filter/digital to analog converter coupled to a reconstruction filter which outputs the analog signal. The hybrid finite impulse response filter/digital to analog converter uses N-taps implemented digitally and N-tap weights implemented in analog using switched capacitors.
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