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Chapter Resources
Chapter 9 - Shift Registers
Chapter Overview
A typical example of a shift
register at work is found within a calculator.
As you enter each digit on the keyboard, the numbers shift
to the left on the display. In other words, to enter the
number 268 you must do the following. First, you press and
release the 2 on the keyboard; a 2 appears at the extreme
right on the display. Next, you press and realease the 6
on the keyboard, causing the 2 to shift one place to the
left, allowing 6 to appear on the extreme right; 26 appears
on the display. Finally, you press and release the 8 on
the keyboard; 268 appears on the display.
This example shows two important characteristics
of a shift register:
- It is a temporary memory
and thus holds the numbers on the display (even if you
release the keyboard number) and
- It shifts the numbers to the left
on the display each time you press a new digit on the
keyboard.
These memory and
shifting characteristics make the shift
register extremely valuable in most digital electronic systems.
This chapter introduces you to shift registers and explains
their operations.
Practice Tests
Chapter Test
EWB (Electronics
Workbench) Files
EWB
textbook files for this chapter.
EWB
experiments manual files for all chapters.
EWB
troubleshooting files for this chapter.
Save the files above to your computer's
desktop. Find the file, double-click it and unzip to a convenient
location. You will need Electronics Workbench®, version
5 to use the files.
Chapter Assignments
Extend your learning
with additional assignments.
Chapter Links
www.fairchildsemiconductor.com
www.onelook.com
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