about offset cancelling in comparator

• Aug 2, 2004

• #1

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icfb

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how to implement offset cancellling in comparator or AMP?
Anybody have some good circuits?
thanks!

 

• Aug 2, 2004

• #2

R

rauol

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8) you can trim the offset using a potentiometer from the ofset pin.
which op amp are u using

 

• Aug 2, 2004

• #3

papyaki

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Hi,

See this app note from maxim : h**p://www.maxim-ic.com/appnotes.cfm/appnote_number/803


* = t

 

• Aug 3, 2004

• #4

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sunking

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You can use chopped method to cancel the offset

 

• Aug 4, 2004

• #5

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piao

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you can refer to Razavi's principle of Data conversion. there are something about offset cancellation.

 

• Aug 6, 2004

• #6

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icfb

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hi sunking,
how to use chopped method ? Please tell me.
thank you

sunking said:

You can use chopped method to cancel the offset

Click to expand...

 

• Aug 6, 2004

• #7

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icfb

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hi piao,
could you offer me the file?
thank you

piao said:

you can refer to Razavi's principle of Data conversion. there are something about offset cancellation.

Click to expand...

 

• Aug 6, 2004

• #8

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sunking

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Message is unavailable.

 

• Nov 25, 2004

• #9

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colonel

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piao said:

you can refer to Razavi's principle of Data conversion. there are something about offset cancellation.

Click to expand...

can I find this book on this site ? thanks

 

• Nov 29, 2004

• #10

leo_o2

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You can design a circuit to increase or decrease output current at the output stage of comparator step by step till the offset is cancelled. Then the circuit burned some trimming cell bits to record the result.

 

• Dec 2, 2004

• #11

M

Markie

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hi, I have know a good network that "h**p://www.edacafe.com"

then you can seach for chopper,

a PHD thesis will give you a lot of knowledge about it.

Or IEEE will help you.

I am also interested with chopper. ^$^

 

• Dec 2, 2004

• #12

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zmliu

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you can downlaod this book by Razavi on EBOOK section in this EDAboard.

 

• Dec 8, 2004

• #13

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yyliang

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to use a chopper amp or view the page 464 of CMOS Analog Circuit Design by P.E.Allen and Holberg.

 

• Dec 8, 2004

• #14

O

okawa

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chopping or SC are very wide used methods in offset cancellation ,and both of the two metods are dynamic .Is there any other method in offset cancellation? Now i am trying an offset cancellation method without capacitor. I tried several methods but they were very unstable.

 

• Dec 8, 2004

• #15

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cetc1525

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can you put a picture on this site?

 

• Dec 12, 2004

• #16

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Autozeroing techniques about comparator
CDS,CHS about Opamp