tr_model_student_report

tr_model_student_report - Faster Adder Design Northwest...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Faster Adder Design Northwest Digital Corporation May 8, 2003 Prepared by: Prepared for: Katie Kimmel Ryan Phillips Assistant Design Engineer Executive Director Research and Development, Product Development Microelectronics Division
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
I. Summary Sales of the NW741 16-bit Binary Adder have dropped 67% in the last four months. Our clients demand a faster and more efficient adder. They are turning to Digital Devices Inc. and their new DD2 Reduced Delay Adder. The DD2’s 412 ns delay is more than six times faster than the NW741’s 2.56 μ s delay. We need a new adder that can compete with the DD2. The development team’s objective was to design a 16-bit adder with a delay of less than 1 μ s and a production cost of less than $13.00. If we replace the serial adder design of the NW741 with a carry look-ahead design, we will reduce the delay from 2.56 μ s to 142 ns. The carry look-ahead design uses 16 one-bit full adders rather than the single full adder the serial adder uses, and it pre-calculates carry bits. Because of this, the adder can begin adding bits without waiting for the sum of the prior bits to be calculated. This greatly reduces the delay time. We can produce the 16-bit carry look-ahead adder for $10.70 per chip, an $8.00 increase from the production cost of the NW741. The adder is nearly three times faster than the DD2 and we can sell the carry look-head for the same price as the DD2. Because the components of the carry look-ahead are similar to those of the serial adder, many of the NW741s can be taken apart and used in the ripple-carry adders. This will save Northwest Digital almost $1681.54 in component cost. If we do not redesign our binary adders they will quickly become obsolete and we will continue to lose business and revenue. If we bounce back quickly, we may become leading supplier of digital binary adders once again. It is important to redesign our 16-bit adders immediately if our company is to have a secure and successful future. 2
Background image of page 2
II. Introduction Two years ago, Northwest Digital Corporation developed the NW741 16-bit binary adder for mass production and marketing. The Product Development Department wanted a device that matched market demand for a cheap, compact 16-bit adder. The adder had to correctly calculate and output the sum of two 16-bit binary inputs and provide for a one-bit carry output in the case of overflow. The adder had to cost less than $4.00 per chip and the circuit’s size had to be less than 25 mm x 25 mm so that we could package it in a 1cm x 1cm chip.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/22/2010 for the course ECH 152B taught by Professor Kim during the Spring '10 term at UC Davis.

Page1 / 7

tr_model_student_report - Faster Adder Design Northwest...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online