Question about sigma-delta modulator design

[princerock]

What is the relationship between quantizer levels and signal to quantization noise ratio(SQNR)?

To increase quantizer levels we need to add more comparators, is this correct?

 

[ronron]

Hi,

This is detailed in the following paper:
PM Aziz, HV Sorensen and J. Van Der Spiegel, "An overview of sigma-delta
converters," IEEE Signal Processing Magazine, Vol.13, No.1, Jan. 1996

 

[sunking]

relationship between quantizer levels and signal to quantization noise ratio(SQNR):
incease the one bit quantizer level, the SNR will increase 6dB


More quantizer levels, more comparators of course, but it also depond on you circuit design too.[/quote]