关键词: pre equalization, post equalization, frequency response, sinx/x, sinc function, interpolation, Nyquist, image frequency, reconstruction filter, FIR, roll-off
Abstract: Digital-to-analog converters (DACs) convert digital data to analog voltage or current in applications such as instrumentation and wireless communications. A DAC's output frequency generally ranges from DC to less than fS/2, where fS is the input-updating frequency. The output frequency response for most DACs, however, rolls off according to the sin(x)/x (sinc) frequency-response envelope.
Equalizing Techniques Flatten DAC Frequency Response.pdf 
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