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Old 22nd January 2011, 06:32 PM   #1
arupg is offline arupg  Latvia
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Default Offset Nulling for BUF03 Buffer


I plan to use an AD/PMI BUF03AJ/883 Buffer in the Input section of a High-Pass Alignment Filter to drive the filter with very Low impedance so that its Q is strictly maintained.

The BUF03 has Trim offset adj using Pins 1 & 5. A +ve supply with a 5k trimmer is to be used as per the suggested circuit. Could members kindly outline

How to null the offset of the BUF03 and what all needs to be done to achieve this?

Thanks in advance!

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Old 22nd January 2011, 09:17 PM   #2
Nisbeth is offline Nisbeth  Denmark
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Unless I am missing something:

1) Build circuit as per schematic
2) Short input and connect meter across output
3) Power up circuit
4) Adjust trimpot for 0V DC-offset
5) Leave circuit to warm up and mnitor offset as circuit warms up
6) Readjust offset if necessary

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Old 23rd January 2011, 04:48 AM   #3
arupg is offline arupg  Latvia
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@ Nisbeth


Thank you so much!
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