electronics

electronics

1. electronic signals and semiconductors

   • is a varying electric current that represent information
     • semiconductors divice
       • is a tronic divice use of semiconductor
       • n type
         • adding an extra element to the electron sillicon
       • p type
         • adding an element with fewer electrons
   • analog signals
     • es an electric current that is varied smoothly to represent information
   • digital signals
     • pulse s of current used to represent information
   • transitors
     • has 2 uses eathier amplifies an electronic signal or switches current on and off
       • is a combination of tree layers of semiconductors
   • diodes
     • shows in figure 3 allows current in one direction only
       • is a combination of n type of semiconductors
   • integrate sircuit
     • is a thin slice of semiconductor that contains many doids

2. electronic communication

   • telephones
     • transmitter
       • is a divice that transfer from one from to another
     • reciver
       • a divice that uses a speaker to transform an electronic signal into sound
     • speaker
       • is a dialin mecanism
   • sound recording
     • can be reproduced usinng an analog divice
       • like cd
       • dj reproductors
   • radio
     • voices or music on an am or fm radio station
       • transmission
         • action of transmit
       • reception
         • it recives electromagnetic waves from radio station
   • television
     • is the transmision of images using electromagnetic waves
       • transmission
         • it transmit images and sound
         • reception
           • it recive video and audio signals

3. computer

   • is an electronic divece that stores process and retrivers information
     • binary sistem
       • is a series of number 1 and 0
     • bits and bytes
       • each 1 or 0 in the binary system is called a bit short for binary digit
   • computer hardware
     • are physical parts that allow reciven store and present information
     • memory
       • computer store information in their memories the 2 types of memory of a computer are external and internal
   • computer soft ware
     • is a set of instruction that directs the computer hardcware to perform operations stored information
       • operating system
         • is a set of basic instruction that keep a computer running
       • aplication software
         • is a type of aolication system
   • computers network
     • allows people in different location to share information and software
       • internet
         • is a global network that links millions of computers in bussines schools