low-pass filter


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Related to low-pass filter: high-pass filter, LPF

low-pass filter

[′lō ‚pas ′fil·tər]
(electricity)
A filter that transmits alternating currents below a given cutoff frequency and substantially attenuates all other currents.

low-pass filter

A filter that blocks high frequencies and allows lower frequencies to pass through. Such filters are used in devices such as POTS splitters that direct phone and DSL signals to different lines. Contrast with high-pass filter.
References in periodicals archive ?
Substituting (2) into (1), the transfer function of (1 + [beta]) order fractional low-pass filter is derived as
To compare with the adaptive filtering method, the raw signal is low-pass filtered at a cut-off frequency of 0.125 Hz.
Based on the transfer function in (3), it is possible to create a block diagram of a desired fractional-order low-pass filter. A block diagram can be then easily transformed into a circuit scheme of the proposed filter in dependence on used active elements.
Sanyal, "Compact sharp cutoff wide stopband low-pass filter using defected ground structure and spurline," Microwave and Optical Technology Letters, vol.
Denoising indexes of the three algorithms are shown in Table 3, where LPF stands for the low-pass filter and NIO indicates that the noise reduction method bases on normalized index optimization mentioned above.
Similarly, a new variable [x.sub.3d] is obtained by a first-order low-pass filter as follows:
Second, the raw RTLS signal of each tag is filtered to remove the impulse noise, using either a median filter or an adaptive low-pass filter. Third, measurements are corrected by a constraint propagation procedure in order to satisfy the following constraints: human anatomic constraints enforcing expected distances between joints and human motion constraints enforcing acceleration and velocity limits.
Nikon has really put an effort with this DSLR, it includes a 24.2 megapixel DX-format CMOS sensor without an optical low-pass filter and the Nikon's latest EXPEED 4 image processing system.
The image to be sharpened is first processed by a Gaussian low-pass filter to get a blurred image, and then the Sobel operator is applied to find the edges in the image as well as the gradient of the pixel to be processed.
To verify the obtained result (12), the special simulation was performed with various low-pass filter passbands: 500 Hz, 1000 Hz, and 1500 Hz.
A detailed design procedure starting from a normalized low-pass filter circuit model to a microstrip dual-band dual-mode square patch bandpass filter design layout will be demonstrated by employing successive frequency transformations and circuit conversions.