Comments on: Sigma delta modulation http://www.dsplog.com/2007/04/03/sigma-delta-modulation/ Signal Processing for Communication Fri, 10 Feb 2012 01:03:15 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Krishna Sankar http://www.dsplog.com/2007/04/03/sigma-delta-modulation/#comment-56449 Krishna Sankar Thu, 26 May 2011 00:16:24 +0000 http://www.dsplog.com/2007/04/03/sigma-delta-modulation/#comment-56449 @sudarshan: Let's discuss in the comment section. More people can track the conversation, if needed @sudarshan: Let’s discuss in the comment section. More people can track the conversation, if needed

]]> By: sudarshan http://www.dsplog.com/2007/04/03/sigma-delta-modulation/#comment-56418 sudarshan Wed, 25 May 2011 18:02:51 +0000 http://www.dsplog.com/2007/04/03/sigma-delta-modulation/#comment-56418 hii, nice to meet you. i am working on sigma delta adc can you send a mail to this id, see you soon. we shall discuss there ..! thanks hii,

nice to meet you.
i am working on sigma delta adc
can you send a mail to this id,
see you soon. we shall discuss there ..!
thanks

]]> By: Krishna http://www.dsplog.com/2007/04/03/sigma-delta-modulation/#comment-205 Krishna Wed, 23 Apr 2008 02:42:29 +0000 http://www.dsplog.com/2007/04/03/sigma-delta-modulation/#comment-205 @Yahia: I have worked only on zero-IF radios till date. So, I do not know enough to comment. I recall reading about bandpass sampling wherein the spectral replicas at the integer multiples of sampling frequency is used for down conversion. Is the non-IQ sampling an advanced version of bandpass sampling? If you have any pointers, it will be helpful. Thanks. @Yahia: I have worked only on zero-IF radios till date. So, I do not know enough to comment.

I recall reading about bandpass sampling wherein the spectral replicas at the integer multiples of sampling frequency is used for down conversion.

Is the non-IQ sampling an advanced version of bandpass sampling? If you have any pointers, it will be helpful. Thanks.

]]> By: Yahia http://www.dsplog.com/2007/04/03/sigma-delta-modulation/#comment-200 Yahia Tue, 22 Apr 2008 22:04:07 +0000 http://www.dsplog.com/2007/04/03/sigma-delta-modulation/#comment-200 I would like to add a comment on ADC sampling for IF signals. I used to think that there is a pereference to choose fs=4IF since that will lead to an efficient mixer implementation (no multiplier is needed). However, I have read recently about non IQ sampling which perfers that fs=(M/N)IF to avoid the IF harmonics to fall on the IF signal. Between these two opinions, which one is really used in industry? I would like to add a comment on ADC sampling for IF signals.

I used to think that there is a pereference to choose fs=4IF since that will lead to an efficient mixer implementation (no multiplier is needed).
However, I have read recently about non IQ sampling which perfers that fs=(M/N)IF to avoid the IF harmonics to fall on the IF signal.

Between these two opinions, which one is really used in industry?

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