Publication

Low-pass J filters. Suppression of neighbor peaks in heteronuclear relayed correlation spectra

Geoffrey Bodenhausen
1983
Journal Articles

Abstract

A procedure is described for the selective removal of NMR signals assocd. with coupling consts. (J) exceeding a lower limit Jmin. The procedure is called "low-pass J filtering" since it leaves signals assocd. with small J couplings essentially unaffected. The procedure is explained for the suppression of neighbor peaks in heteronuclear relayed correlation spectra. The efficiency of the technique is demonstrated by using the relayed spectra of glucose in an equilibrated mixt. of a and b anomers. [on SciFinder (R)]

Official source

https://infoscience.epfl.ch/entities/publication/d4de2c0b-39ea-44af-931c-30ee81ca3b8d

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Geoffrey Bodenhausen
1983
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/d4de2c0b-39ea-44af-931c-30ee81ca3b8d

About this result

Related concepts (11)

Low-pass filter

A low-pass filter is a filter that passes signals with a frequency lower than a selected cutoff frequency and attenuates signals with frequencies higher than the cutoff frequency. The exact frequency response of the filter depends on the filter design. The filter is sometimes called a high-cut filter, or treble-cut filter in audio applications. A low-pass filter is the complement of a high-pass filter. In optics, high-pass and low-pass may have different meanings, depending on whether referring to the frequency or wavelength of light, since these variables are inversely related.

High-pass filter

A high-pass filter (HPF) is an electronic filter that passes signals with a frequency higher than a certain cutoff frequency and attenuates signals with frequencies lower than the cutoff frequency. The amount of attenuation for each frequency depends on the filter design. A high-pass filter is usually modeled as a linear time-invariant system. It is sometimes called a low-cut filter or bass-cut filter in the context of audio engineering. High-pass filters have many uses, such as blocking DC from circuitry sensitive to non-zero average voltages or radio frequency devices.

All-pass filter

An all-pass filter is a signal processing filter that passes all frequencies equally in gain, but changes the phase relationship among various frequencies. Most types of filter reduce the amplitude (i.e. the magnitude) of the signal applied to it for some values of frequency, whereas the all-pass filter allows all frequencies through without changes in level. A common application in electronic music production is in the design of an effects unit known as a "phaser", where a number of all-pass filters are connected in sequence and the output mixed with the raw signal.