TECH 158 - Digital Electronics - Digital-to-Analog Converter - Analog-to-Digital Converter - Engineering Assignment Help

Assignment Task :

OBJECTIVES:

• Understand the operation of a successive-approximation ADC and an R/2R ladder DAC

• Build an R/2R ladder DAC and test it with a 4-bit binary counter 

Design and build a successive-approximation ADC using an R/2R DAC

You prepare for conversion by resetting the successive-approximation register (SAR) to zero. Conversion is done by testing each bit of the SAR: set a bit HIGH; convert the resulting digital number stored in the SAR to analog using a DAC; compare its analog output with the analog input (Vin) that is to be converted to digital. Conversion is complete when all bits of the SAR are tested. Detailed procedure is as follows:

1. Reset SAR to zero.

2. Test one bit of SAR at a time by setting it HIGH, starting from D7 (MSB)

3)    DAC converts the SAR content to analog (Vout)

4. Comparator compares V+ (Vout) with V- (Vin) and produces a HIGH output when V+ ≥ V-.

5. Modify the logic state of the bit being tested depending on the comparison result:

• If the result = 0, then Vin is smaller (that is, if the digital value in the SAR is too large). Thus, clear the bit;

• else leave the bit set at 1; 

• once properly modified, you are done with this bit. You DO NOT change this bit again.

This Engineering Assignment has been solved by our Engineering  Experts at onlineassignmentbank. Our Assignment Writing Experts are efficient to provide a fresh solution to this question. We are serving more than 10000+ Students in Australia, UK & US by helping them to score HD in their academics. Our Experts are well trained to follow all marking rubrics & referencing style.

Be it a used or new solution, the quality of the work submitted by our assignment experts remains unhampered. You may continue to expect the same or even better quality with the used and new assignment solution files respectively. There’s one thing to be noticed that you could choose one between the two and acquire an HD either way. You could choose a new assignment solution file to get yourself an exclusive, plagiarism (with free Turnitin file), expert quality assignment or order an old solution file that was considered worthy of the highest distinction.