A network of elements used to attenuate all frequencies below a predetermined frequency. Frequencies above the cutoff point pass without any effect. also see: AKA: Antonym: Source: http://www.the12volt.com/glossary/glossary.asp
When a low-level transducer signal is superimposed on a large dc output voltage, a high-pass filter might be useful. This attenuates (removes) low frequencies. Using a cut-off frequency of, say, 4 Hz, will eliminate the dc voltage which has a frequency of zero. A high-pass filter will remove "drift". This can be a particular problem with biological and chemical signals, but not usually with modern electronic signals. See Issue 8 of our newsletter for more information.