ELECTRONICS

ELECTRONICS

1. WHAT IS ELECTRONICS? is the use of electric current to control and communicate , and rocess information

2. WHAT IS ELECTRONIC SIGNALS ? is a varying elctric current that represent information

   • TYPES OF ELECTRIC SIGNAL : ANALOG SIGNALS , DIGITAL SIGNALDS
     • ANALOGS SIGNAL
       • DIGITAL SIGNALS

3. SEMICUNDUCTROS

   • IS A MATERIAL THAT CONDUCTOR CURRENT BETTER THAN INSOLATOR CONDUCTS CURRENT ONLY UNDER CERTAIN CONDITIONS
     • N-YYPES SEMICUNDUCTORS
       • P-TYPES SEMICUNDUCTORS
       • • THE TWO TYPES OF SEMUCONDUCTORS CAN BE COMBINE IN DIFFERENT WAYS TO MAKE
           • DIODES , TRANSISTORS , AND INTEGRATES CIRCUITS
             • DIODES: an electronic component that consist of an N.-Type and a P- types semiconductor together is a diode
             • transistors when a layer of ne type of semiconductor is sandwich between two layer of the other type of structure of a transitor .
             • INTEGRATES CIRCUITS : individual electronic components can be combined into larger groups, called itegrated circuits , to increase their usefullness .

4. ELECTRONIC COMMUNICATION

   • IN A TELEPHONE , SOUND IS TRASORMED INTO A ELECTRONIC SIGNAL THAT IS TRANSMITTED AND THEN TRANSFORMED BACK
     • • RADIO : VOCES OR MUSIC ON AN AM or FM radio station are electonic signals carried by an electromagnetic wave
         • amplitude modulation (AM)
           • carrier wave
           • ampliude moduation (FM)
     • transmit
     • • electronic signal from anpother telephone are recieved and transformed into sound waves
         • sound waves from this telephone are transformed into electronic signals and transmitted
   • COMPUTER

5. COMPUTER HARDWARD: includes a central processing unit , input , device and memory storage devices

   • central precessing unit : the central processing unit, or CPU, serves as the brain of the computer
   • input and output device a evice that feed data to CPU output force : the force exerted on a object by a machine
   • SOFT WORD : is a set of instructions that directs the computer hardware to perform operation on stored information
     • 1823 : THE DIFFERENCE ENGINE , 1890 CENSUS COUNTING MACHINE , 1946 ENIAC , 1974 PERSONAL COMPUTERS , 2000 PERSONAL DATA ASISTANT

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