low pass filter


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Related to low pass filter: Band pass filter, High pass filter

low pass filter

(electronics, graphics)
A filter that attenuates high frequency components of a signal.

In image processing, a low pass filter might be used to remove noise from an image.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)
References in periodicals archive ?
3) Amplifier Stage 1: After passing through the low pass filter, the input then passes through amplifier stage 1.
Low Pass Filter. Single and cascaded dumbbell shaped DGSs were used with microstrip line and T-junction of microstrip line to design a low pass filter [12].
By using low pass filter with watershed, the algorithm helped in meticulous detection of tumor in different MRI slices of brain.
Furthermore, to demonstrate the operation of the OTA, a basic low pass filter is employed.
The gm[C.sub.f] filter is a first order low pass filter. It is designed separately for each application as the inductor specifications are determined resistance [R.sub.f] are variable.
In [1, 5], the procedure of deriving the band-pass filter equivalent to the low pass filter has been thoroughly explained.
H(s) =-1/[s.sub.3] + [2s.sup.2] + 2s + 1, now transform it to the digital low pass filter. Solution: the denominator F(s) = [s.sup.3] + [2s.sup.2] + 2s + 1 can be known from H (s),Translate F (s) for -1 unit., and therefore, [c.sub.0] = 1 [c.sub.1] = 5 [c.sub.2] = 9 [c.sub.3] = 6 ([c.sub.i](i = 0,1,2,3,)) [b.sub.i] = [2.sub.i] So, [b.sub.0] = [c.sub.3] = 6 [b.sub.1] = [2c.sub.2] = 18 [b.sub.2] = [4c.sub.1] = 20 [b.sub.3] = [8c.sub.0] = 8 And then get the center polynome F'(x), F'(x) = [6x.sup.3] + [18x.sup.2] + 20x + 8 translate the F (x) for -1 unit, and as a result, get the digital filter H(Z)'s denominator polynome F(Z).
Even with the introduction of Qi hyper-chaotic systems to the encryption process, there was successfully attack to the process of encryption by power spectrum and low pass filter method.
TECHNOLOGY AND FABRICATION OF MEMS TUNABLE LOW PASS FILTER
The flow diagram shown in figure 2 is missing a low pass filter between the RF antennae stage and the local oscillator stage.
The high pass filter provides us so called DWT detail coefficients while approximation coefficients are provided by the low pass filter. Therefore, because of down sampling, the total number of coefficients after the first step is the same as the number of the input samples.
The USB-controlled, programmable USBPGF-S1 is a single-channel, signal-conditioning instrumentation amplifier and low pass filter. Configurable for various applications, it is available in a range of filter characteristics.

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