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Article #14814Re: 0-38mV ==> 4-20mA Conversion
From: RICHARD O. WHITE
Date: Thu, 19 Nov 1992 18:18
Date: Thu, 19 Nov 1992 18:18
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1643 bytes
In article <jtaylor.5.722100058@dseg.ti.com>, jtaylor@dseg.ti.com (Jeff Taylor) writes: >Can anyone suggest the best method (or design) to convert a 0 to 38 mV >pressure transducer signal to a 4 to 20 mA signal that I can send down >1000' of cable? I'm aware of the Burr Brown current transmitter devices, >but am seeking a simple op-amp solution. The BB chips need a much larger >voltage span as input. > >Thanks, > >Jeff : JTAYLOR@DSEG.TI.COM > Try 1-800-872-9436 OMEGA technical assistance.... nice outfit they carry exactly what you want at reasonable prices.. also ask for their books or call 800-222-2665 hotline pressure-strain book has applications sections and product line data I'm not assocated or a rep.... just a satisfied customer.... there are analog ckts avaible by Ti or Motorla ect if you wish to design your own.. but why reinvent the wheel... they went through the stability-noise-freq problems already.. second thought voltage -> freg converter might be a little better.... analog devices, intersil, might be a source .. I believe they have datat aqua. chips with front end gain to give 1000 to 1 v-f & f-v conversion... 1000' is a long antenna ..... hope this helps..... --
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Path: arc1-ca.pugleaf.net!sparky!uunet!zaphod.mps.ohio-state.edu!darwin.sura.net!wupost!ukma!cs.widener.edu!dsinc!netnews.upenn.edu!netnews.cc.lehigh.edu!ns1.cc.lehigh.edu!row0 From: row0@ns1.cc.lehigh.edu (RICHARD O. WHITE) Newsgroups: sci.electronics Subject: Re: 0-38mV ==> 4-20mA Conversion Message-ID: <1992Nov19.181855.63992@ns1.cc.lehigh.edu> Date: 19 Nov 92 18:18:55 GMT Organization: Lehigh University Lines: 30