Relationship between ELD and OSR?

[ken_cn]

Dear All,

Could you please tell me what's the relationship between OSR and ELD in continous-time sigma-delta
ADC? And why lower OSR is more sensitive to ELD?

Thanks a lot!

best,
Ken

 

[pancho_hideboo]

Higher OSR results lower quatization noise level at feedback.
So effect due to ELD can be alleviated.

See pp.213-215 of the following.
https://www.amazon.com/gp/reader/0471465852/ref=sib_dp_pt#reader-link

BTW, it seems that 2nd edition of this book is published this year.

 

[erikl]

See pp.213-215 of the following.
https://www.amazon.com/gp/reader/0471465852/ref=sib_dp_pt#reader-link

Of all pages, just these aren't available via the Search Inside This Book service, unfortunately :sad:

 

[pancho_hideboo]

Of all pages, just these aren't available via the Search Inside This Book service, unfortunately :sad:

I don't know.
**broken link removed**

 

[erikl]

Thank you. Now I've noticed the book is publicly available via this web location.

 

[pancho_hideboo]

Now I've noticed the book is publicly available via this web location.

I don't think it is publicity.
The web location is "*.cn".

 

[erikl]

I don't think it is publicity.
The web location is "*.cn".

Never fear: you can get it from western universities, too.

 

[ken_cn]

Higher OSR results lower quatization noise level at feedback.
So effect due to ELD can be alleviated.

See pp.213-215 of the following.
https://www.amazon.com/gp/reader/0471465852/ref=sib_dp_pt#reader-link

BTW, it seems that 2nd edition of this book is published this year.

Hi pancho_hideboo:

Thanks a lot! Dose it mean that the feedback signal traces the input signal more rapidly in a DSM with higher OSR, which leads to lower error?

best,
Ken

 

[pancho_hideboo]

Dose it mean that the feedback signal traces the input signal more rapidly in a DSM with higher OSR, which leads to lower error?

No.
Narrower width of DAC results smaller quantized noise.

See book I refered.