DFD Build CIC Filter VI

Digital Filter Design VIs and Functions

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Owning Palette: Multirate Utilities VIs

Installed With: Digital Filter Design Toolkit

Creates a cascaded integrator comb (CIC) filter.

Examples

Place on the block diagram

Find on the Functions palette

filtering mode specifies the processing mode of the filter that this VI creates.

0	No Rate Change—Does not change the sampling frequency of a signal.
1	Interpolation—Increases the sampling frequency of a signal to a higher sampling frequency that differs from the original frequency by an integer value. Interpolation also is known as up-sampling.
2	Decimation (default)—Reduces the sampling frequency of a signal to a lower sampling frequency that differs from the original frequency by an integer value. Decimation also is known as down-sampling.

filter type specifies the type of filter that this VI creates.

0	Lowpass (default)
1	Highpass

# stages specifies the number of stages in the CIC filter.

factor specifies the sampling frequency conversion factor of the CIC filter.

differential delay specifies the differential delay of the CIC filter in samples. The valid values include 1 and 2. The default is 1.

error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node.

	status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE.
	code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.
	source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.

CIC filter out returns a new CIC multirate filter.

error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error.

	status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.
	code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code.
	source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

Examples

Refer to the following VIs for examples of using the DFD Build CIC Filter VI:

CIC Filter Design VI: labview\examples\Digital Filter Design\Floating-Point Filters\Multirate
Open example Browse related examples
Generate LabVIEW FPGA Code for Moving Average Filter VI: labview\examples\Digital Filter Design\Fixed-Point Filters\Multirate
Open example Browse related examples
Create Multirate Filter VI: labview\examples\Digital Filter Design\Getting Started\Design Filters
Open example Browse related examples

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