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Background of our topic.

Current d/a methods

Remember that there are many uses for D/A conversion, not just audio reproduction, so different methods are used for different practical applications. One of the most frequently used methods in industry is D/A converters that oversample or interpolate. Oversampling is where one samples a signal at a much higher frequency than is specified by the Nyquist rate. This means that it samples much more often than at twice the bandwidth of a signal. This oversampling usually result in effectively shifting the noise present in the important low frequencies into high frequencies which can then easily be low pass filtered. This results in D/A converters with high resolution and low cost. Another commonly used type, and the one that most closely reflects what we chose in our project, is a binary-weighted D/A converter. This type has more focus on hardware implications, rather than the software implications of the oversampling mentioned earlier. Binary-weighted D/A converters require components that take each of the bits entering the converter to a summing point where they add up to an accurate Vout value. The disadvantage to this method is that the D/A converter is inaccurate due to the individual tolerances of the components. A subcategory of this converter type is an R/2R ladder, that has resistor values of R and 2R for each of the input bit streams. This fixes the accuracy problem for low resolution converters since it is simple to find resistors of these R/2R values.

What is a beaglebone black?

The BeagleBone Black

The BeagleBone Black is a single-board embedded computer that is made with open source software and hardware for developmental purposes. For our project, we were provided a BeagleBone Black by the Department of Electrical and Computer Engineering at Rice University, but it is much cheaper than a full-fledged computer. Its processing power and storage space are much smaller, but if one plugged in an HDMI to a monitor and a USB to a keyboard, it can seem like a real computer running Linux. There are 46 total I/O pins but many of them are reserved for special uses, so only approximately 30 of them are general purpose I/O. With the processor speed and I/O count in mind, we chose our design to rely on using 8 pins and therefore 8 bits. Also note that the audio files we stored on the BeagleBone Black have exactly a 44.1kHz sampling rate.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
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Source:  OpenStax, Elec 301 projects fall 2014. OpenStax CNX. Jan 09, 2015 Download for free at http://legacy.cnx.org/content/col11734/1.2
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