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IIR Cascade Filter with I.C. PtByPt (Not in Base Package)

LabVIEW 8.5 Help
August 2007

NI Part Number:
371361D-01

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Filters x using the cascade form of the IIR filter specified by the IIR Filter Cluster.

This VI is similar to the IIR Cascade Filter with I.C. VI.

initialize, when TRUE, initializes the internal state of the VI.
x is the input signal to filter.
IIR Filter Cluster contains the cascaded form of IIR filter coefficients. This cluster is the output from one of the IIR coefficient design VIs: Butterworth Coefficients, Bessel Coefficients, Chebyshev Coefficients, Elliptic Coefficients, or Inv Chebyshev Coefficients.
filter structure selects IIR second-order or fourth-order filter stages.
Reverse Coefficients is the reverse coefficients of the IIR cascade filter.
Forward Coefficients is the forward coefficients of the IIR cascade filter.
Initial Condition contains the initial internal filter state. The Initial Condition array should be the same size as the Reverse Coefficients array in the IIR Filter Cluster. If this array is not the correct size, such as if the array is empty, the array resizes internally and initializes to zero before the IIR filtering operation.
Filtered x contains the result of filtering the input sequence x by convolution.
Final Condition contains the final, internal filter states, which Initial Condition can pass to the next call to the IIR Cascade Filter with I.C. PtByPt VI to filter samples continuously.
error returns any error or warning from the VI. You can wire error to the Error Cluster From Error Code VI to convert the error code or warning into an error cluster.

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