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Pnp Transistor
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PNP Transistor
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( ¦pē¦en¦pē tran′zis·tər ) (electronics) A junction transistor having an n-type base between a p-type emitter and a p-type collector.
･ A PNP bipolar transistor is a semiconductor device with three terminals, or sections, referred to as... ･ A PNP transistor is formed from three layers of doped semiconductor regions. P stands for positive, and... ･ Diodes are composed of ...
"P" is for Positive and "N" is for Negative So basically put a PNP Transistor Would use N to Switch P, in the name "PNP" or "NPN" the first character is for the polarity of the Collector-pin, the seco...
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The PNP transistor increases the current to enough to drive the relay. The signal to the transistor would not be able to drive relay without the PNP to boost it.
http://answers.yahoo.com/question/index?qid=20081207060...
Hey there, Think of it this way: "P" is for Positive and "N" is for Negative So basically put a PNP Transistor Would use N to Switch P, in the name "PNP" or "NPN" the first character is for the polari...
http://wiki.answers.com/Q/When_a_pnp_transistor_is_conn...
It can be converted by using an NPN/PNP Conversion Connector below. The connector, however, is not applicable to all models of Photomicrosensors. Be sure to check the items to find which Photomicrosensors are applicable.
http://www.ia.omron.com/support/faq/answer/50/faq01304/...
Digikey's parametric search says there are 447 PNP transistors with Ic of 3.5A or better (and up to 60A...) Parametric searches let you search through a database based on parameters rather than on strings. VERY useful. Start at http://www.d...
http://www.instructables.com/community/Do_they_make_PNP...
The same h parameter model is used for npn and pnp transistors because gain is gain. It does not matter if you are using a negative or a positive system. So long as you are consistent in your calculations, you will get the correct results. ...
http://wiki.answers.com/Q/Why_same_h_parameter_model_is...
There are at least two reasons. First, PNP transistors can have lower noise figures since the majority carriers in the base are electrons, not holes like in an NPN. Low noise designs will often use a PNP input stage. Second, there are tim...
http://answers.yahoo.com/question/index?qid=20080521123...
if the arrow of emitter terminal is outwards is called npn transistor otherwise if the arrow of the emitter terminal of a transistor is inwards is called pnp transistor
http://wiki.answers.com/Q/How_do_you_identify_a_pnp_or_...