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common diode detection

  1. 2011/08/15(月) 16:11:20|
  2. 精彩美文|
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 3rd, alloy diode   In the N germanium or on the silicon monocrystal chip, through metal and so on alloy indium, aluminum methods manufactures PN to tie forms. The forward loss of voltage is small, is suitable for the big electric current rectification. When its PN ties is reverse the electrostatic capacity to be big, therefore is not suitable for the high frequency detection and the high frequency rectification.


  4th, proliferation diode voltage modulation
  In the high temperature P foreign gas, heats up the N germanium or the silicon monocrystal chip, causes the monocrystal chip surface to turn P, by this law PN knot. Because PN ties the forward loss of voltage to be small, is suitable for the big electric current rectification. Recently, used the big electric current rectifier's mainstream already from the silicon alloy shift to the silicon proliferation.


  5th, floor diode   PN ties although the manufacture method is the same with the proliferation, but, only retains PN to tie and the essential part, uses the drugs perish the nonessential part. Its surplus part then presents the releasing face shape, therefore acquires fame. The initial period production's floor, is makes to the semiconducting material use diffusion process. Therefore, is also called this kind of floor proliferates the floor. Regarding this type, the product model which as if big electric current rectification uses are very few, but the undercurrent switch uses the product model are actually many.

 
6th, plane diode


  In the semiconductor monocrystal chip (is mainly N silicon monocrystal chip) on, proliferates the P impurity, using the silicon chip surface oxide film's shielding effect, only selectively proliferates the PN knot which on the N silicon monocrystal chip a part forms. Therefore, does not need to adjust PN to tie the area the drugs corrosive action. Because the semiconductor surface is manufactured smoothly, therefore acquires fame. And, PN union surface, because of by oxide film cover, therefore recognizes for is the stability is good and life long type. At first, regarding the semiconducting material which uses is uses the extension law to form, therefore outside is called the plane the Yanping face shape. Speaking of the plane diode, as if uses the model which uses in the big electric current rectification to be very few, but makes the model which the undercurrent switch uses to be many. The electric appliance
  7th, alloy diffusion diode


  It is the alloy one kind. The alloy material is easily the material which proliferates. The material which manufactures with difficulty through mixes ingeniously matches the impurity, can cross the proliferation together with the alloy, so that was already forming PN ties obtains the impurity the appropriate density distribution. This law is suitable for the manufacture high sensitivity varactor.  


 8th, extension diode   Makes the diode which with the extension face length's process PN ties forms. When manufacture needs the very excellent technology. Because can control the impurity at will the different density distribution, therefore is suitable in the manufacture high sensitivity varactor.


 1st, the detection uses the diode   Speaking of the principle, takes out the modulation signal from the input signal is the detection, (100mA) is usually smaller than by commutated current's size as the demarcation line the output current 100mA calls the detection. A germanium material contact, the operating frequency may reach 400MHz, the forward voltage drop is small, the junction capacitance is small,hotel interior design the efficiency of rectification is high, the frequency characteristic is good, is 2AP. The similarity touches the diode which such detection uses, besides uses in the common diode detection, but can also use in restricting, electric circuits and so on clipping, modulation, mixing, switch. Also has for the frequency modulation detection special-purpose characteristic uniformity good two diode assembly.   2nd, the rectification uses the diode


  The rectification diode's internal structure is a PN knot, the contour seal has the metal shell to seal, the plastic package and the glass packaging and so on many kinds of forms. Its tube size along with electric valve's parameter, but different. The rectification diode mainly uses in the leveling circuit, using diode's single item electrical conductivity, becomes the alternating current the direct current. Is big as a result of electric valve's forward current, therefore rectification diode many for surface contact diode, ties the area to be big, the junction capacitance is big, but the operating frequency is low. the 2CP series shell uses in the undercurrent rectification.


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