Data converter with minimum phase fir filter and method for calculating filter coefficients.

摘要

A data converter employs at least one minimum phase FIR filter (132,160,230,240 or 252), and includes an analog-to-digital converter (220) for converting an incoming analog signal into a plurality of digital signal samples, followed by a minimum phase FIR filter to filter the digital signal samples. Alternatively, the data converter includes a digital-to-analog converter (170) preceded by a minimum phase FIR filter to filter a plurality of digital signal samples that are converted into an analog signal by the digital-to-analog converter. The data converter may include both an analog-to-digital converter (220) and a digital-to-analog converter (170). In a preferred embodiment, the minimum phase FIR filter (132,160,230,240 or 252) is an optimum minimum phase FIR filter. A method for precisely calculating the filter coefficients of an optimum minimum phase FIR filter is also disclosed.