Filter circuit with switchable finite impulse response and infinite impulse response filter characteristics
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United States of America Patent
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Feb 7, 1995
Grant Date -
N/A
app pub date -
Nov 18, 1993
filing date -
Nov 18, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A filter which can operate as a digital filter of the finite impulse response type or the infinite impulse response type using one circuit. The signal to be filtered is multiplied and added using a first calculation circuit and a second calculation circuit. The outputs of the calculation circuits are added using addition circuits. Either the output of the addition circuit or the input of the first calculation circuit is applied by a switching element to the first calculation circuit.
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