Comparison with vacuum tubes, Electrical Engineering

Comparison with vacuum tubes:

Prior to the growth of transistors, vacuum (electron) tubes (or in the UK (United Kingdom) "thermionic valves" or just "valves") were the major active components in electronic equipment.


The main advantages that have permitted transistors to replace their vacuum tube predecessors in several applications are

  • Small size and minimal weight that permitting the development of miniaturized electronic devices.
  • Highly automated manufacturing processes that resultant in low per-unit cost.
  • Lower possible operating voltages, creating transistors appropriate for small, battery-powered applications.
  • No warm-up period for cathode heaters needed after power application.
  • Lower power dissipation and usually greater energy efficiency.
  • Higher reliability and bigger physical ruggedness.
  • Very long life. Some transistorized devices have been in service for much more than 50 years.
  • Complementary devices available that facilitating the design of complementary-symmetry circuits, something not possible with vacuum tubes.
  • Insensitivity to mechanical shock and vibration so avoiding the problem of microphonics in audio applications.
Posted Date: 1/10/2013 6:29:27 AM | Location : United States

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