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Design >> Analog Design >> add random noise into ADC input
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Message started by fangjh on Jul 12^th, 2005, 11:20pm

Title: add random noise into ADC input
Post by fangjh on Jul 12^th, 2005, 11:20pm

When ADC oversample and decimation, the DC and slow-moving cann't benefit,to slove the problem adding a bandlimit noise, this noise can be using linear serial feedback registers to do, but I have no paper about this(linear serial feedback ....), can you help me, or give me some advice? thanks

Title: Re: add random noise into ADC input
Post by fangjh on Jul 13^th, 2005, 7:06pm

please help me!

Title: Re: add random noise into ADC input
Post by fangjh on Jul 14^th, 2005, 8:36pm

some question:
1) The dither noise is ramdom, and the fs/2k<f<fs/2, at last the noise can be filter by low pass filter, why limit the noise ampplitude between -0.5LSB and +0.5LSB!