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how the delta sigma output is converter to binary form

Started by cmos_189 June 29, 2005
hello
the output of the delta sigma modulator is a series of pulses of 1 and -1
so how does the final output is in the binary(bcd form) form.
what is the role of the integrator in the delta sigma modulator
how does the integrator remove quantization noise



		
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cmos_189 wrote:
> hello > the output of the delta sigma modulator is a series of pulses of 1 and -1 > so how does the final output is in the binary(bcd form) form.
The output of the modulator is low-pass filtered.
> what is the role of the integrator in the delta sigma modulator > how does the integrator remove quantization noise >
The integrator does not remove quantization noise, it just shapes the noise spectrum to put the noise power at as high a frequency as possible. Its the low-pass filter that actually gets rid of the noise. -- ------------------------------------------- Tim Wescott Wescott Design Services http://www.wescottdesign.com