Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

sigma delta A/D interview questions

Status
Not open for further replies.
S

svensl

Full Member level 1
Full Member level 1
Joined
Mar 25, 2005
Messages
99
Helped
1
Reputation
2
Reaction score
0
Trophy points
1,286
Activity points
2,202
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?
 
  • Like
Reactions: kuaiyu

    K

    kuaiyu

    Points: 2
    Helpful Answer Positive Rating
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 ?
 
  • Like
Reactions: kuaiyu

    S

    svensl

    Points: 2
    Helpful Answer Positive Rating
    K

    kuaiyu

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top