Application Of Electronics

Communication And Entertainment
Used in Telephony,Radio Broadcasting, TV communication and so on . Important for the development of a country

Line communication
Telephony
Telegraphy 
Telex
Teleprinters
Wireless communication
Radio Broadcasting
TV broadcasting
Facsimile
Satellite
Internet
Audio Systems
PA systems
Stereo Amplifiers
Record Players
Tape recorders


Defense Applications
Radar
Guided Missiles
Coded Communication

Industrial Application
Automatic Control Systems
Heating And Welding Systems
Computers
Medical Sciences
X-rays
Electron Microscope
Electrocardiogram
Electro therapy
Instrumentation
Precision measuring instruments
eg: VTVM,CRO,frequency counters,pH meters , strain gauge etc

What Is Switched Mode Power Supply(SMPS)

With the advancement in the field of electronics the need of dc  supplies increased .It was NASA in 1960 made SMPS.Subsequently due to it's  light weight and compact size SMPS became popular .Now 70%-80% of production of power supplies is SMPS

There is a phase controlled rectifier to give a dc voltage .But why we use SMPS?.The ripples in DC should be minimum for better rectification.So filtering of ac must be efficient,therefore the filtering circuit must be a large /bulky LC filter.

SMPS works on principle of DC chopping.The output is varied by varying the duty cycle of chopper by PWM or FM technique .The circuit configuration are of four types,Fly back,push pull,half bridge and full bridge

For SMPS inverter PWM technique is used.The output is converted to dc by a diode rectifier .As inverter is allowed to operate at higher frequency.The ripples on dc can be filtered out by small L&C components.For power transistors chopping frequency is limited to 40KHZ  ,power MOSFET 200KHZ .As frequency high low size needed .

What is Electronics?

We all know about the word electronics.Here in this blog I'm giving a detailed study of electronics.

The word electronics is derived from electron mechanics which means study of behavior of electrons under different condition of externally applied fields.

 

The institution of radio engineers(IRE) has given a standard definition for electronics.It is the field of science and engineering which deals with electron devices and their utilization.Here electronic device is a device in which conduction takes place by movement of electron through a vacuum,a gas or a semiconductor .

We shall study in the next post that follow how electronic device function,and how they can be used in our daily life.