Fast high precision discrete-time analog finite impulse response filter
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United States of America Patent
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Oct 8, 1996
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N/A
app pub date -
Dec 21, 1994
filing date -
Mar 31, 1994
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Abstract
A high precision fast finite impulse response (FIR) filter which periodically samples an analog input signal and holds a sequentially-replaced number of the resulting discrete-time analog values in fixed storage cells while each value is being multiplied by a number of digital weights. The discrete-time analog values are not passed through delay devices and therefore do not degrade. The weights are stored in a memory or shift register and supplied to the multipliers in a repeating sequence. A predetermined number of the weights are set to zero to increase the setup time of the analog multipliers thereby increasing the precision without slowing the clocking frequency.
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