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sigma delta A/D interview questions

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delta-sigma dead band

Hello,

I'm going for a job interview and a big part will be questions on delta-sigma A/D converters. I am wanting to prepare and would appreciate some feedback as to what might be asked.
BTW, it will be telephone interview at first.

cheers,

Ps I am familiar with the basic principle, i.e. noise shaping, quantization noise, oversampling.......but am looking for questions regarding the implementation of SD converts.....what architectures, nonlinearities, error sources......
 

data converters interview questions

"what is your SDM architecture?"
 

sigma.delta pros and cons

- In a 2nd order sigma-delta modulator, what is the main tradeoff that determines the feedback coefficients?

- In a first order sigma-delta modulator, what is the relationship between quantization error, integrator DC gain and input signal level?
 
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    kuaiyu

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interview questions on sigma delta

1) What is dead band zone and how can you reduce that ?

2) What are the pros and cons of higher order SD architecture ?

3) What is the lowest allowable quantizer gain ?

4) What is the relationship between OSR and SQNR ?

5) What kind of filters are suitable for single bit stream SD and why ?

6) What is ditering...how does it affects the SNR of the signal ?

You want more...dont forget to click helped button :)

Added after 8 minutes:

1) Whst is Lee's rule and how is it used to make the SD stable ?

2) How do you reduced the relationship between quantization error and input signal ?

3) What parameters characterized
a) oversampling converters
b) Nyquist converters

4) What are the different data converters performance metrics ?
 
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    svensl

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    kuaiyu

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