Upsampling requires a lowpass filter after increasing the data rate, and downsampling requires a lowpass filter before decimation.
12.
Stacks of capacitive grids make a lowpass filter with a sharp frequency cutoff above which transmission is almost zero.
13.
A built in mismatch protection of the final stage is included and band switched lowpass filters provide the necessary interference protection.
14.
The type of filter required is a lowpass filter, and in this application it is called an anti-aliasing filter.
15.
It can be removed by a lowpass filter, such as the radio's speaker, which cannot vibrate at such a high frequency.
16.
By shifting the frequency of the reference beam, the lowpass filter becomes a bandpass filter centered at the detuning frequency, and selective narrowband detection and imaging can be performed.
17.
The lowpass filters pass the difference ( i . e . baseband ) frequency while rejecting the sum frequency image, resulting in a complex baseband representation of the original signal.
18.
This reduces the data rate to 66 kbit / s ( half that of LP2 ), partly by using joint stereo coding and a lowpass filter around 13.5 kHz.
19.
The Whittaker Shannon interpolation formula is mathematically equivalent to an ideal lowpass filter whose input is a sequence of Dirac delta functions that are modulated ( multiplied ) by the sample values.
20.
Typically, the geometric mean is used in systems based on certain transformations of lowpass filter designs, where the frequency response is constructed to be symmetric on a logarithmic frequency scale.
