Dynatron full name should be semiconductor dynatron, also call ambipolar model dynatron of transistor, crystal, it is a kind of semiconductor device that controls electric current. Its action is a faint signal enlarge becomes the telegraphic number with larger amplitude, also can use as without contact switch. Crystal dynatron, it is semiconductor basic one of yuan of parts of an apparatus, have voltaic enlarge effect, it is the core component of electronic circuit. Dynatron is in a semiconductor base piece on make the PN ties with two very close apart, two PN knot distributes whole semiconductor into 3 parts, intermediate part is base area, two side part is emissive area and market cable division, arrange means to have PNP and NPN two kinds.

 

How to discern dynatron type, discern an E (blast off extremely) , B (base) , C (collector) 3 electrode?

 

① judges the type of base B and dynatron with avometer of type of pressing with a finger: Block avometer ohm buy “Rx100” or “Rx1k” part, assume first of dynatron some very ＂ base ＂ , receive black list pen on the base of hypothesis, red list the pen is received early or late in the others two extremely on, the resistance that if be measured twice,gets is very little (or reach thousands of Europe for hundreds of Europe about) , the base that assumes is correct, and the dynatron that be measured is NPN canal; Alexandrine, the resistance that if be measured twice,gets is very great (reach a few Europe for thousands of Europe about) , the base that assumes is correct, and the dynatron that be measured is PNP canal. If measure gotten resistance twice,be one big one small, the base of original hypothesis is wrong, must assume another electrode is “ base ” afresh at this moment, repeat afore-mentioned tests again.

 

C of ② judgement collector and blast off extremely E: Still block ohm of avometer of type of pressing with a finger buy “Rx100” or “Rx1k” part, with NPN the canal is exemple, receive black list pen on the collector C of hypothesis, red watch pen receives hypothesis blast off extremely on E, hold B and C with the hand extremely (cannot make B, C is contacted directly) , pass human body, be equivalent to be being received between B, C slant buy resistor, numerate the block value that the place that express a head shows, receive two watches pen instead next measure again. If measure gotten block to be worth for the first time smaller than the 2nd, the specification holds water suppose formerly, the electricity that because of the resistance between C, E small specification carries avometer is big, slant buy is normal.

 

③ measures diode to block with digital avometer (HFE) : When using, affirm transistor type first, the dynatron that inserts foot of E of the pipe that be measured, B, c3 correspondence of face plate of digital type avometer respectively next inserts Kong Zhong, right now dial can show the approximation of HFE.