Ins and Outs

Discussion in 'General Electronics Chat' started by Metalmann, Nov 27, 2013.

  1. Metalmann

    Thread Starter Active Member

    Dec 8, 2012
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    I'm having trouble with some schematics, regarding the ins and outs.

    I'm posting a pic from Blah2222's thread.

    I don't see where the current/voltage enters, and exits.......:confused:


    Probably simple......but I'm stumped.:confused:

    Some schematics are pretty easy.
     
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  2. mcgyvr

    AAC Fanatic!

    Oct 15, 2009
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    Well the 2 circles (ref des V2 and V3) with the + and - are voltage sources..
    Obviously some of that schematic is missing too after the LT1492 IC
     
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  3. WBahn

    Moderator

    Mar 31, 2012
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    Enters and exits... what? The LT 1920? The circuit as a whole?

    Try to identify specific questions, such as "Where does the "+2.5V" that is shown in several places come from?"

    Otherwise we will be answering questions you don't have and not answering questions you do.
     
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  4. Jony130

    AAC Fanatic!

    Feb 17, 2009
    3,957
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    Input signal is represent by V2 AC voltage source. Input signals enters IN pin of a LT1920 (instrumentation amplifier). After the gain signal is present at the OUT pin.
    Next signal pass through high pass filter (C3, R10) and enters non inverting amplifier (U1).
    V3 is a 5V DC supply voltage. R3,R4 and voltage follower (U2) creates +2.5V reference voltage (virtual ground). Needed to proper bias op amp from single 5V supply voltage.
     
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  5. GopherT

    AAC Fanatic!

    Nov 23, 2012
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    3,756
    Described perfectly.
     
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