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Flicker noise in CT current DAC

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chienchc

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This probably be a very stupid question but I really need somebody to help me out.

I am designing a CT current-steering DAC for audio band applicaion.
It seems flicker noise are not discussed or just viewed as "not important" among
the papers.

Why? As I do the AC noise simulation from 0 to 20KHz.
The flicker noise always dominates.
And why people usually just mention the thermal noise but flicker noise?
In audio band it's clearly a low-frequency application, isn't it?


Thanks!
 

I think Current steering DACs are used for high frequency applications, so they might neglect this noise
 

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    chienchc

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Hi,
In your simulation you have taken a bandwidth of 0 to 20KHz, where as the best audio bandwidth starts from 20Hz only and most of the audio signals are centered around 1KHz. Since the flicker noise is a 1/f noise, it may not be important for AC amplifiers for audio applications.
Regards,
Laktronics
 

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    chienchc

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