High speed analog-to-digital converter and digital-to-analog converter
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United States of America Patent
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Nov 5, 2002
Grant Date -
N/A
app pub date -
Dec 20, 1999
filing date -
Dec 21, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A high speed analog-to-digital converter, for converting an analog input signal (u(t)) with a maximum frequency (F.sub.max) to a digital output signal (x(n)) with an output sampling rate (F.sub.s) at least double the maximum frequency (F.sub.max), comprises a plurality of analog narrowband filters (F.sub.0 -F.sub.M-1) for filtering the analog input signal (u(t)) to produce a corresponding plurality of narrowband signals (X.sub.0 -X.sub.M-1), which is supplied to a corresponding plurality of analog-to-digital converter units (AD.sub.0 -AD.sub.M-1). The converter also comprises sampling and summing circuitry for sampling the outputs of the analog-to-digital converter units sequentially at the predetermined sampling rate (Fs) and summing the resulting sampled signals to produce the digital output signal (x(n)).
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