Echo curiosity : Amplifier / Transistor

Have you thought of how a happy function like marriage, party, or a play would have been without an amplifier? Boring, nope? Well, this question has been bothering me until I ended opening a rocking amplifier (with permission of father, lolz) to solve the curious questions rising in my mind – How was it possible?

What is an amplifier?

First let’s understand what is an amplifier? “An amplifier, electronic amplifier or amp is an electronic device that can increase the power of a signal. An amplifier uses electric power from a power supply to increase the amplitude of a signal.” (Wikipedia)

So, on opening the speaker I found that there is one electronic circuitry with many other components. Just to mention that, at that time I was in my second semester Diploma and was only familiar with one of the electronic key component named “Transistor”.

The discovery was that I was elated to finally understand that its main role in circuitry or in amplifier, the mixer is to increase the signal to certain level with the help of many of the supporting components like resistors, capacitors, diode etc. Let’s have a look about transistors and its role in technology development.

Transistors and its role in technology development –

A short presentation about transistors and it’s role in technology development.

In 1906, the eccentric American inventor Lee De Forest developed a triode in a vacuum TUBEStube.

  • Drawbacks :
    • High cost
    • Generate large amount of heat
    • High failure rate
    • High voltage is required to operate vacuum tubes
    • Consumes large power
    • Huge in size



The first practically implemented device was a point-contact transistor invented in December 1947 by American physicists John Bardeen, Walter Brattain, and William Shockley at Bell Laboratories.



It solved all the drawbacks of Vacuum Tubes. Most important feature is that can be combined in the millions on one cheap die to make an integrated circuit, whereas tubes are limited to at most three functional units per glass bulb.





  •   As an amplifier
  • As a switch
  • In integrated Circuit



In 1959, Dawon Kahng and Martin M. (John) Atalla at Bell Labs invented the metal–oxide–semiconductor field-effect transistor (MOSFET) as an offshoot to the patented FET design.

MOSFET which has become the most commonly used three terminal devices brought revolution in the world of electronic circuits. Without MOSFET, the design of integrated circuits would have been impossible today.

With the help of Scaling Integration Technology first microprocessor was built by Intel in 1971 named P4004 in which MOSFETs are better for high-power applications because they can switch faster than normal transistor.

No. Of Transistor are 2,300  on single chip of silicon wafer.P4004

Check out the transistor’s count in whole processor journey. The list of processors is also available with their timeline.


Qualcomm Snapdragon Processor


Qualcomm made a big deal of the fact that this SoC (System on Chip) is smaller than a one cent coin. Well, that’s exactly what the 10nm process achieves. Qualcomm says the 835 is 35% smaller than the 820, but contains over 3 billion transistors.

It is highly featured Mobile Processor in current market & used in below mentioned phones.

  • Samsung Galaxy S8 and S8 Plus
  • Xiaomi Mi 6
  • Sony Xperia XZ Premium
  • HTC U11
  • OnePlus 5
  • ZTE Nubia Z17
  • Sharp Aquos R

Upcoming Nokia Series

  • Nokia P1
  • Nokia 8
  • Nokia 9

The Snapdragon 835 is visibly smaller than its predecessor (left).


Today’s all technology bases is gift of an Electronics Semiconductors device Transistor.



Check out these videos to understand how transistors work:

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