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Inkwaterman
Joined: 28 Apr 2004
Posts: 31
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 05 Jan 2005 8:57 High precision variable resistance |
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Hi to everybody !
I need to change the gain on a instrumental amplifier from a microcontroller.
I used an INA118 and a PIC's family micrcontroller.
For change the gain I must change the value of one resistance.
Somebody know a High precision variable resistance usable from a PIC ?
Thx
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ee_wmkab
Joined: 08 May 2004
Posts: 19
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| 05 Jan 2005 11:31 Re: High precision variable resistance |
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You can use some digital potentialmeter for the changing the close loop gain in you application. They are availible in Farnell.
OR
You can also use the transistor pluse 1% resistor to implement this varbile gain control.
BR
Keith
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Inkwaterman
Joined: 28 Apr 2004
Posts: 31
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| 05 Jan 2005 15:13 Re: High precision variable resistance |
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| ee_wmkab wrote: |
You can also use the transistor pluse 1% resistor to implement this varbile gain control.
BR
Keith |
I Am interesting on this solution but I have not understood as it function. You could makes to see an example me?
Thanks
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