Warning: Use of undefined constant referer - assumed 'referer' (this will throw an Error in a future version of PHP) in /usr/home/essaywo/public_html/essays on line 102

Warning: Use of undefined constant host - assumed 'host' (this will throw an Error in a future version of PHP) in /usr/home/essaywo/public_html/essays on line 105

Warning: Cannot modify header information - headers already sent by (output started at /usr/home/essaywo/public_html/essays:102) in /usr/home/essaywo/public_html/essays on line 106

Warning: Cannot modify header information - headers already sent by (output started at /usr/home/essaywo/public_html/essays:102) in /usr/home/essaywo/public_html/essays on line 109
Digital Block For A Function Generator - College Paper

Digital Block For A Function Generator


The Digital Block is the heart of this digitally controlled function generator. Symmetry and frequency variation is direct result of the design of this block. In this design the emphasis was on simplicity and some target specifications at the top of the frequency variation were compromised in order to achieve greater simplicity. This design achieves 28 frequencies in the range of 100Hz to 100kHz. Whilst the 17 frequencies from the range 100Hz to 10kHz are symmetry variable in five steps from 0.1 to 0.5. The last eight frequencies only managed to achieve symmetry variations 0.5 and 0.25. This is due to some limiting factors that will be discussed later. The table of achievable frequencies ...

Want to read the rest of this paper?
Join Essayworld today to view this entire essay
and over 50,000 other term papers

the control module, counter module, filter control module and 8-bit D/A. The D/A chosen is the DAC0801LCN. It’s specifications can be found in the appendix. The layout of this design is shown below.










The interconnections will be discussed later but the thickness of the lines indicates the number of bits in the bus lines.
As the name suggests the control module takes user inputs, processes them and sends them out to the respective modules. The functionality module generates the count, varying between 0 to 255 in 256 steps or in 64 steps. The 8-bit D/A changes this count into a wave and the filter selector module selects which filter in the filter block to pass the signal through.
While extensive testing has been done on the functionality module, the control module and filter selector module are relatively simple and have not been tested due to the inability to do so. The control module consists primarily of switches and ROM’s while the filter selection module ...

Get instant access to over 50,000 essays.
Write better papers. Get better grades.


Already a member? Login


Symmetry: This employs the circular switch. 8 different symmetries are provided. Consequently, a 3-bit ADC is used. The provided symmetries and their binary is as follows:

000: 8/16 | 001: 9/16 | 010: 10/16 | 011: 11/16 | 100: 12/16 | 101: 13/16 | 110: 14/16 | 111: 15/16 |
Amplitude: This also utilizes the circular switch. This control signal is fed straight through to a multiplexer in the amplifier block. We are providing 16 different amplitudes. Therefore, a 4-bit ADC is used. The amplitudes and their corresponding binary is as follows:

0000: 10mV |0001: 20mV |0010: 40mV |0011: 60mV |
0100: 80mV |0101: 0.1V ...

Succeed in your coursework without stepping into a library.
Get access to a growing library of notes, book reports,
and research papers in 2 minutes or less.


CITE THIS PAGE:

Digital Block For A Function Generator. (2006, August 10). Retrieved December 23, 2024, from http://www.essayworld.com/essays/Digital-Block-For-A-Function-Generator/50514
"Digital Block For A Function Generator." Essayworld.com. Essayworld.com, 10 Aug. 2006. Web. 23 Dec. 2024. <http://www.essayworld.com/essays/Digital-Block-For-A-Function-Generator/50514>
"Digital Block For A Function Generator." Essayworld.com. August 10, 2006. Accessed December 23, 2024. http://www.essayworld.com/essays/Digital-Block-For-A-Function-Generator/50514.
"Digital Block For A Function Generator." Essayworld.com. August 10, 2006. Accessed December 23, 2024. http://www.essayworld.com/essays/Digital-Block-For-A-Function-Generator/50514.
JOIN NOW
Join today and get instant access to this and 50,000+ other essays


PAPER DETAILS
Added: 8/10/2006 09:26:57 AM
Category: Technology
Type: Premium Paper
Words: 2356
Pages: 9

Save | Report

SHARE THIS PAPER

SAVED ESSAYS
Save and find your favorite essays easier

SIMILAR ESSAYS
» Digital Block For A Fucntion Ge...
» What Is ISDN?
Copyright | Cancel | Contact Us

Copyright © 2024 Essayworld. All rights reserved