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Re: Long term stability of matched resistors?

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Hi Peter,

> Just ordinary metal film types like vishay CCF55
> (http://www.vishay.com/docs/31015/ccf55.pdf)

schau mal auf Seite 2 im eben zitierten Datenblatt unter Performance. Da 
stehts:
Je nach Umgebungseinfluß darf sich der Widerstandswert signifikant 
(Jeweils um 0,5%) verändern

In der Praxis werden abgeglichene Widerstände fast immer nah beieinander 
montiert (alleine schon wegen der thermischen Drift), da sollte dann 
auch bei beiden Widerständen ähnliches passieren. Aber wenn man sich 
darauf verlassen soll, dann sollte man wenigstens ein paar Testreihen 
aus verschiedenen Chargen testen.

Wenn es aber ohnehin Geld kostet, die Teile zu selektieren, dann ist es 
billiger gleich entsprechend eng tolerierte Widerstände zu kaufen.

So long

Marte

Sorry about the german writing here, but it is much easier for Peter an 
me ;-)

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Long term stability of matched resistors? "Peter Heitzer" <peter.heitzer@rz.uni-regensburg.de> - 2017-02-13 09:33 +0000
  Re: Long term stability of matched resistors? Phil Allison <pallison49@gmail.com> - 2017-02-13 03:10 -0800
    Re: Long term stability of matched resistors? "Peter Heitzer" <peter.heitzer@rz.uni-regensburg.de> - 2017-02-13 15:27 +0000
  Re: Long term stability of matched resistors? Chris Jones <lugnut808@spam.yahoo.com> - 2017-02-14 00:02 +1100
  Re: Long term stability of matched resistors? Steve Goldstein <sgoldHAM@alum.mit.edu> - 2017-02-13 08:30 -0500
  Re: Long term stability of matched resistors? Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> - 2017-02-13 08:55 -0500
  Re: Long term stability of matched resistors? John Larkin <jjlarkin@highlandtechnology.com> - 2017-02-13 08:43 -0800
    Re: Long term stability of matched resistors? "Peter Heitzer" <peter.heitzer@rz.uni-regensburg.de> - 2017-02-13 17:22 +0000
      Re: Long term stability of matched resistors? John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-02-13 10:23 -0800
      Re: Long term stability of matched resistors? Marte Schwarz <marte.schwarz@gmx.de> - 2017-02-14 20:02 +0100
        Re: Long term stability of matched resistors? John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-02-14 11:16 -0800
          Re: Long term stability of matched resistors? Marte Schwarz <marte.schwarz@gmx.de> - 2017-02-14 22:45 +0100
            Re: Long term stability of matched resistors? John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-02-14 14:52 -0800
              Re: Long term stability of matched resistors? Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-02-14 15:13 -0800
                Re: Long term stability of matched resistors? George Herold <gherold@teachspin.com> - 2017-02-14 16:35 -0800
                Re: Long term stability of matched resistors? Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-02-14 16:47 -0800
                Re: Long term stability of matched resistors? George Herold <gherold@teachspin.com> - 2017-02-14 17:29 -0800
                Re: Long term stability of matched resistors? Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-02-14 17:45 -0800
                Re: Long term stability of matched resistors? George Herold <gherold@teachspin.com> - 2017-02-14 18:17 -0800
                Re: Long term stability of matched resistors? John Larkin <jjlarkin@highlandtechnology.com> - 2017-02-14 18:37 -0800
              Re: Long term stability of matched resistors? Marte Schwarz <marte.schwarz@gmx.de> - 2017-02-15 09:48 +0100
                Re: Long term stability of matched resistors? George Herold <gherold@teachspin.com> - 2017-02-15 07:12 -0800
                Re: Long term stability of matched resistors? bill.sloman@ieee.org - 2017-02-15 20:15 -0800
                Re: Long term stability of matched resistors? John Larkin <jjlarkin@highlandtechnology.com> - 2017-02-15 20:28 -0800
                Re: Long term stability of matched resistors? George Herold <gherold@teachspin.com> - 2017-02-16 06:32 -0800
                Re: Long term stability of matched resistors? John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-02-16 09:56 -0800
                Re: Long term stability of matched resistors? Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-02-16 11:08 -0800
                Re: Long term stability of matched resistors? bill.sloman@ieee.org - 2017-02-16 18:10 -0800
                Re: Long term stability of matched resistors? jack4747@gmail.com - 2017-02-16 02:19 -0800
                Re: Long term stability of matched resistors? Jasen Betts <jasen@xnet.co.nz> - 2017-02-18 09:50 +0000
  Re: Long term stability of matched resistors? "Peter Heitzer" <peter.heitzer@rz.uni-regensburg.de> - 2017-02-16 09:26 +0000
    Re: Long term stability of matched resistors? jack4747@gmail.com - 2017-02-16 02:22 -0800
      Re: Long term stability of matched resistors? "Peter Heitzer" <peter.heitzer@rz.uni-regensburg.de> - 2017-02-16 16:04 +0000
        Re: Long term stability of matched resistors? jack4747@gmail.com - 2017-02-16 08:19 -0800

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