Analogue to digital converter, Basic Computer Science

Analogue to digital converter:

In an ADC a range of input values must correspond to a unique digital word.  The type of code used depends on the system but here only binary coding will be considered. 

Consider an analogue signal, which can take on any value between 0 and 7 volts.  For any particular voltage there is a corresponding binary code word. For example, using 3-bit words, the voltage analogue value between 4 and 5 volts would be represented in binary code by the word 100, which would change to 101, when the analogue value passed through 5 volts. 

Figure shows digital representation of an analogue input signals.

14_analog to digital converter.png

The levels at which the code changes are known as quantisation levels, and the intervals between them as quantisation intervals.  In the example given in Figure 5.3.3, the quantisation levels are 0, 1, 2, 3, 4, 5, 6 and 7 volts, and the quantisation interval is 1 volt. 

Using a 3-bit word gives 23 = 8 different quantisation levels.  With a 4-bit word we would have 24 = 16 quantisation levels with 0.5 volt quantisation intervals giving improved resolution over the same range of input voltage. 

Thus the more bits available the greater the resolution for a given range of analogue signal input.  It can be seen from the above that an ADC using an n-bit word would have a resolution of one part in 2n.  

 

Posted Date: 9/13/2012 8:09:54 AM | Location : United States







Related Discussions:- Analogue to digital converter, Assignment Help, Ask Question on Analogue to digital converter, Get Answer, Expert's Help, Analogue to digital converter Discussions

Write discussion on Analogue to digital converter
Your posts are moderated
Related Questions
Create an implementation of the Ordered Associative Array API using left-leaning red-black trees. Illustrate the use of the API by refactoring your WordBench as a client of Ordered

What''s a resource based view of Apple Corporation?

create a flowchart showing average score for the 3 quizzes assume that there are 3 sections each having 5 students the only valid number to be entered is 1-100 for the quizzes shou

two characteristics og CISC architecture?

#to determine whether given year is leap year or not

Q: HOW DO YOU CODE -- WITHOUT USING ARRAYS OR SPLIT FUNCTIONS -- TO SEPARATE COMMA SEPARATE NUMBER VALUES AND THEN SUM TO TOTAL? I.E., USING SUBSTRING AND INDEXOF. I''ve been try

Algorithm : Once a problem has been defined precisely, a procedure or process must be designed to produce the required output from the given input. Since a computer is a machine t

QUESTION (a) How VoIP Works and how VoIP helps today's business? (b) What is a signaling protocol? Explain about SIP components and their key benefits (c) What is IPTV? L

How would you format while loops to fufill my project write up?

What constitutes ERP? ERP typically comprises a client server architecture, fourth generation language, RDBMS and graphical user interface in an open systems environment. It