Transcription of AN-256Circuitry for Inexpensive Relative Humidity …
{{id}} {{{paragraph}}}
Example: confidence
AN-256Circuitry for Inexpensive Relative Humidity …
ApplicationReportSNOA720B August1981 ,humidityis ,albeithighlyaccurate,arenotobviousandte ndtobeexpensiveandcomplex(SeeBox).Accura tehumiditymeasurementis vitaltoa numberofdiverseareas,includingfoodproces sing,paperandlumberproduction, , August1981 RevisedMay2013AN-256 CircuitryforInexpensiveRelativeHumidityM easurementSubmitDocumentationFeedbackCop yright 1981 2013, ,thesensordescribedbytheresponsecurve(Fi gure1) isinexpensiveandprovidesa furtherconsiderationin signalconditioningis ,it hasa C a chemicallytreatedstyrenecopolymerthathas a atitssurface,timeresponseis reasonablyrapidandis blockdiagramoftheconceptchosentoinstrume ntthesensorappearsin Figure2. Anamplitudestabilizedsquarewavethatis symmetricalaboutzerovoltsis usedtoprovidea precisionalternatingcurrentthroughthesen sor,satisfyingtherequirementfora fedintoa currentsensitive(forexample,theinputis atvirtualground)logarithmicamplifier, scaled,rectifiedandfilteredtoprovidea 40%is compensatedbybreakpointtechniquesin Figure3.
Circuitry for Inexpensive Relative Humidity Measurement www.ti.com The other 1/2 of A2 is used to compensate the sensor departure from logarithmic conformity below 40%
Tags:
Information
Domain:
Source:
Link to this page:
Please notify us if you found a problem with this document: