What's the advantage of using pga in sigma-delta modulator?

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gingerjiang

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hi all,

there is a pga(programmable gain amplifier) in front of sigma-delta modulator.
who will tell that the advantages of using pga?

thanks advanced!
 

Re: pga in modulator

renwl said:
increase the dynamic range.
Click to expand...

can you explain it in detail?
thanks a lot
 

pga in modulator

little signal can be amplified to large signal for later processing. larger signal can be adjusted too.

so you can process a larger dynamic range.
 

    gingerjiang

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