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...iscTheorems.htm#G7 |archivedate=2012-03-21 }}</ref> and certain transistor amplifiers at high frequencies.<ref name = "sandiego">{{cite web|url=http://home.sandi ...his role: a person and a [[potentiometer]] in a [[Potentiometer (measuring instrument)#Constant current potentiometer|potentiometric null-balance meter]], an ele ...

...ments or voices more (or less) prominent, enhance particular aspects of an instrument's tone, or combat [[Audio feedback|feedback]] (howling) in a [[public addre ...the original performance picked up by a [[microphone]]. [[amplifier|Audio amplifiers]] have long had filters or controls to modify their frequency response. The ...

...volume and tone, a [[switch]] to select between different pickups (if the instrument has more than one), and the output [[Phone connector (audio)|socket]]. Ther ...ough their size can prove problematic as they're designed for use in audio amplifiers and consequently have working voltages in excess of 500 V, far higher than ...

...xpansion of the universe, the 400-800&nbsp;MHz operating band of the HIRAX instrument corresponds to [[redshift]]ed 21-cm emission from <math>0.8 < z < 2.5</math == Instrument == ...

...e-Domain Reflectometer MTDR1.jpg|thumb|A [[time-domain reflectometer]]; an instrument used to locate the position of faults on lines from the time taken for a re ...ave when only passive elements are involved (but see [[negative resistance#Amplifiers|negative resistance amplifier]] for an example where this condition does no ...

[[Category:Instrument amplifiers]] ...

...cost, isolation or size. The current value may be directly displayed by an instrument, or converted to digital form for use by a monitoring or control system. ...n measured current and the rest of the measurement circuit. However, these amplifiers are expensive and can also limit the bandwidth, accuracy and thermal drift ...

...ular devices are test connection blocks, used for testing and isolation of instrument transformer circuits.]] ...inconvenient high voltages are required for the circuits, and vacuum tube amplifiers had difficulty with incorrect operation due to noise disturbances. ...

...to the same frequency as the transmitter, analogously to tuning a musical instrument to resonance with another. This is the system used in all modern radio. ...howls in the speaker. The oscillations were caused by [[feedback]] in the amplifiers; one major feedback path was the [[capacitance]] between the plate and grid ...