Embedded Systems Conference
Home    Bloggers    Blogs    Article Archives    Messages    About Us   
Tw  |  Fb  |  In  |  Rss

ADC Guide, Part 1: the ideal analog/digital converter

50%
50%
SunitaT0
SunitaT0
3/19/2013 1:29:33 PM
User Rank
Master
1LSB vs resolution
Sachin and Akshay, thanks for the detail description on the ADC.
1LSB is equal to VFs / 2^N, it stands to reason that better accuracy (lower error) can be realized if we use a higher resolution and/or use a smaller input voltage. The problem with higher resolution (more bits) is the cost. Also, the smaller LSB means it is difficult to find a really small signal as it becomes lost in the noise, reducing SNR performance of the converter. The problem with reducing the input voltage is a loss of input dynamic range. Again, we also can lose a small signal in the noise, causing a loss of SNR performance.

One suggestion, it will be great help if you can add all the links of the previous posts on ADC guides in your upcoming posts (like "Related posts").

50%
50%
amrutah
amrutah
3/19/2013 2:27:13 PM
User Rank
Master
Re: 1LSB vs resolution
@sunitaT: To add to your point, "the smaller LSB means it is difficult to find a really small signal as it becomes lost in the noise...". 

Higher resolution will lead to many constraints on the quantiser, the offset of the quantiser will become comparable.  The memory requirements will increase.  Do you see any further complexities???

50%
50%
Brad Albing
Brad Albing
3/19/2013 4:57:21 PM
User Rank
Blogger
Re: 1LSB vs resolution
I'll try to get those links added. But in the meantime, use the search function (upper right) and search on either of the authors' names or "ADC Guide" - that should point you to the other posts.

50%
50%
amrutah
amrutah
3/19/2013 2:26:23 PM
User Rank
Master
links to all parts...
I agree with SunitaT, if the links to all the parts of the ADC series 1-13 and further are available at one place then it will be helpful.

50%
50%
Brad Albing
Brad Albing
3/19/2013 4:58:23 PM
User Rank
Blogger
Re: links to all parts...
I'm working on it!

50%
50%
latest blogs
As an engineer, eventually you will have to insert an equation into your written work or presentation. This can be a struggle as equation editors are not always the friendliest. However, there is good news. The equation editor in Word has improved immensely (I am using version 2010 here). In this blog we look at how to insert an equation into a Word document. As a bonus, there is information on how to insert an equation into a web page with an html code generator website.
Wait a minute. Let’s see if I understand this. (Here I’m channeling you, the puzzled reader, after you’ve grabbed me in the coffee break of a Filter Wizard lecture morning). The frequency of the nth harmonic of a sinusoid is n times that of the fundamental. The nth harmonic distortion is defined as the ratio of the amplitude of the nth harmonic to the amplitude of the fundamental. So the 1st harmonic distortion is… the ratio of the amplitude of the fundamental to the amplitude of the fundamental and that’s… unity. I. Do. Not. Understand.
Single-ended signals are very common, but increasingly signal paths are being converted to differential signals as part of the signal chain. The benefits of differential signaling are particularly appealing with low supply voltage systems and for driving analog-to-digital converters (ADCs).
If you spend any time at all looking at alternative energy sources such as wind power and solar energy, you'll quickly discover one inconvenient truth: alternative energy production is both highly unpredictable and uncorrelated to energy demand.
When Radio Shack announced that they were closing stores, unfortunately the one in Cupertino (De Anza Blvd.) was one of them.
flash poll
educational resources
 
follow Planet Analog on Twitter
Planet Analog Twitter Feed
like us on facebook
our partners
Planet Analog
About Us     Contact Us     Help     Register     Twitter     Facebook     RSS