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.

Advantages:

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







Related Discussions:- Comparison with vacuum tubes, Assignment Help, Ask Question on Comparison with vacuum tubes, Get Answer, Expert's Help, Comparison with vacuum tubes Discussions

Write discussion on Comparison with vacuum tubes
Your posts are moderated
Related Questions
Phenomenon - Fet operation: For either improvement- or depletion-mode devices, at drain-to-source voltages very much less than gate-to-source voltages, changing the gate volta

(a) Consider the circuit of the noninverting amplifier in Figure, including an ideal op amp. Obtain an expression for the voltage gain of the overall circuit. (b) Let R i = 10

Execution Unit receives program instruction codes and data from BIU, implements these instructions and store the result in general registers.


recent trends in power system

Meter Field Testing and Installation Practices Here, we discuss the installation, commissioning and field testing of meters. Energy Meters - Installation and Commissionin

8 bit  data to memory This form  of the  instruction is used to  copy 8 bit  data directly  to the memory  location pointed  by register pair HL.  The instruction  format is

A step-down transformer has primary turns Np = 100; secondary turns Ns = 10; primary winding resistanceRp = 100 ?; secondary winding resistance Rs = 2 ?. Assume that there is no l

Buck Boost Converter The output  of buck boost  regulator may be  less than  or greater than the  input  voltage. Since  the polarity of output  voltage  is opposite  to that

Q. ADMM (digital multimeter) reads true rms values of current. If the peak value of each of the following periodic current waves is 5 A, find the meter reading for: (a) a sine wave