Field effect provides circuit graph sign

   Say the appearance that provides to field effect is afraid I need not stick a graph, pursue medium in circuit it is commonly used

  Express, because the tectonic principle about it compares abstraction, we are the use that popularization tells it, be not told more so, the sort that because ask to differ according to use occasion,does is various, characteristic endless also identical; we are commonly used in Mpn is to serve as the electronic-controlled switch of power source power supply to use commonly, so need is compared through electric current big, it is to use a more special kind of production method to make so will increase model field effect is in charge of (MOS) , its circuit graph symbol:

   See you carefully can discover, these two graphs have a difference it seems that, was opposite, this is canal of effect of two kinds of different buildup field actually, the first that calls N raceway groove to increase model field effect canal, the 2nd that calls P raceway groove to increase model field effect canal, their action is just contrary. Had said in front, field effect canal is switch of the pilot that use phone, so we are told first how to use it to become of switch, from inside the graph we can see it also has 3 feet like dynatron, these 3 feet are called grid respectively (G) , source pole (S) and leakage extremely (D) , mpn sticks a component sketch map mediumly is this appearance:

  1 foot is grid, this grid is control pole, add in grid electrify is pressed and do not add electrify pressing to control 2 feet and of 3 feet be interlinked with do not be interlinked, of N raceway groove, electrify is added to press in grid 2 feet and 3 feet with respect to electrify, take out voltage closes, and of P raceway groove just contrary, electrify pressing is added to close in grid (high potential) , take out voltage (low potential) was interlinked!