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What is the chopper stabilization ?

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amitbhaiji

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Chopper stabilization!

what is it chopper stabilization. and how it take care of Flicker noise and offsetr voltage in diffrential amp.

Amit
 

Re: Chopper stabilization!

The concept is failry simple:

you modulate the input signal at slightly higher frequency than DC (so offset does not count anymore and flicker noise impact is highly reduced). At this frequency the amplifier gain is still high, then, you demodulate the signal at the output.

nathan
 

Re: Chopper stabilization!

Nathan,
Can you pls elaborate on the same. How exactly do we the modulation (up-conversion) and demodulation in the device.
Lets us consider the case of the opam in the ADC then how we are going to take care of the offset voltage using the chopper stabilization so that the harmonic distortion in the the ADC is less.
Will this upconverter and downconverter will not add some nonlinerity to our circuit are we not shifting the proble for one domain to other.
Can you tell me various method to reduce the offset voltage.

Amit
 

Re: Chopper stabilization!

Crunch of points..plus i am new member to this forum...cannot download the doc.
Amit
 

Re: Chopper stabilization!

Wait few days then you can download for free from Mirror site.

nathan
 

Re: Chopper stabilization!

What is this mirror site...and how to download from there....

Amit
 

Re: Chopper stabilization!

Just look at the attachement form ... there is a "Free mirror" label below the word "Download". But it works after few days the posting date.

nathan
 

Chopper stabilization!

Have anyone tried using this technique and successfully simulated it using Cadence? Really appreciate any help. Thanks
 

Chopper stabilization!

thanks for the paper
 

Chopper stabilization!

I really need this paper but i dont have enough points.Cld anyone tell me how 2 earn the points?
 

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