• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print

Home > Ordnance Documents and other related manuals > > Figure 71. Size Comparison of Electron Tubes and Semiconductors
Semiconductor Competiton
Energy Bands

Electronic Principles
Page Navigation
  102    103    104    105    106  107  108    109    110    111    112  

ELECTRONIC PRINCIPLES - OD1647 - LESSON 1/TASK 2
FIGURE 71. SIZE COMPARISONS OF ELECTRON TUBES AND
SEMICONDUCTORS.
solid­state devices may require no more than 20 watts of power.
However, the same number of tubes would require several
kilowatts of power.
For high­power applications, it is a different story; tubes have
the upper hand. The high­power electron tube has no equivalent
in any semiconductor device. This is because a tube can be
designed to operate with over a thousand volts applied to its
plate, whereas the maximum allowable voltage for a transistor is
limited to about 200 volts (usually 50 volts or less). A tube
can also handle thousands of watts of power. The maximum power
output for transistors generally ranges from 30 milliwatts to
slightly over l00 watts.
When it comes to ruggedness and life expectancy, the tube is
still in the competition. Design and functional requirements
usually dictate the choice of devices. However, semiconductor
devices are rugged and long­lived. They can be constructed to
withstand impacts that would completely shatter an ordinary
electron tube. Although some specially
106






Western Governors University

< Previous Page
Index ^
Next Page >

Privacy Statement
Press Release
Contact

© Copyright Integrated Publishing, Inc.. All Rights Reserved. Design by Strategico.