2007-11-04 01:37:46 · 3 answers · asked by Ahmed A 1 in Science & Mathematics ➔ Physics
A conventional common-emitter transistor circuit amplifies both voltage and current. The signal is applied to the base, and base current is amplified. The output signal voltage is the product of the amplified signal current and the collector load resistance.
The ref. explains basics of a transistor's internal functioning and describes simple amplifier circuits.
2007-11-04 01:59:35 · answer #1 · answered by kirchwey 7 · 1⤊ 0⤋
As a result of a "current transfer function, beta," a small change in current at the base input of a transistor results in a large change in collector current at the output of the transistor. The results is both a current and voltage amplification when measured across load resistors.
Av = Eo / Ein, and = (Ic x Rc) / (Ib x Rin)
2007-11-04 04:01:00 · answer #2 · answered by Bob D1 7 · 0⤊ 0⤋
There are two types of semiconductor, p type and n type
A transistor is a sandwich of one type of semiconductor
(the meat) in between two of the other type of semiconductors (the bread)
If a small alternating current travels through the meat, then a large alternating current (which is an exact amplified version of the current through the meat) will flow through the sandwich from one piece of bread, through the meat, to the other piece of bread
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2007-11-04 02:03:11 · answer #3 · answered by The Wolf 6 · 0⤊ 0⤋