Patent ID: 7924959

Claim:
A data conversion method, comprising: acquiring samples of low frequency signal components of an applied analog signal at a first data conversion rate and samples of high frequency signal components of the applied analog signal at a second data conversion rate that is higher than the first data conversion rate; and processing the acquired samples of the low frequency signal components of the applied analog signal and the acquired samples of the high frequency signal components of the applied analog signal to provide an output signal that represents the applied analog signal over a frequency range that includes the low frequency signal components and the high frequency signal components of the applied analog signal, wherein processing the acquired samples of the low frequency signal components of the applied analog signal includes applying a first correction filter to the acquired samples of the low frequency signal components to provide a first signal, and wherein processing the acquired samples of the high frequency signal components of the applied analog signal includes applying a second correction filter to the acquired samples of the high frequency signal components to provide a second signal and summing the first signal and the second signal to provide the output signal, wherein applying the first correction filter includes measuring a first impulse response to an impulse signal applied to a data conversion system input with a first data converter, synthesizing a first finite impulse response filter based on the measured first impulse response, and establishing the first correction filter by a ratio of a frequency response of the first finite impulse response filter to a Fourier Transform of the measured first impulse response.