A BJT has values of IE=12mA and IB = 600 mA(micro). What is the exact value of beta?

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A BJT has values of IE=12mA and IB = 600 mA(micro). What is the exact value of beta?

2007-12-19 18:49:11 · 2 answers · asked by random Q 2 in Science & Mathematics ➔ Engineering

2 answers

Beta is Ic/Ib, where Ic is the collector current. The emitter current Ie is the sum of the base and collector current, so

Ie = Ib + Ic

Ic = Ie - Ib

Beta = Ic/Ib = (Ie - Ib)/Ib = Ie/Ib - 1

Ie = 12mA, Ib = 0.6mA, so Ie/Ib = 20 and beta = 20 -1 = 19

2007-12-19 18:53:38 · answer #1 · answered by gp4rts 7 · 0⤊ 0⤋

it doesnt have any value its pants

2007-12-20 02:51:38 · answer #2 · answered by caz 3 · 0⤊ 1⤋