Formulas for 4.1-4.7

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18 Terms

1
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IE = IC + IB

IE = (β + 1)IB

IE = ?

2
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βdc = IC / IB

βdc =

3
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hfe

βdc is sometimes referred to as ___

4
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βac = ΔIC/ ΔIB

βac =

5
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αdc = IC / IE

αdc =

6
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αac = ΔIC / ΔIE

αac =

7
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α = β / β + 1

α =

8
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β = α / α - 1

β =

9
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IC = βIB

IC =

10
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VCE = VCB + VBE

VCE=

11
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IC (sat) = VCC / RC

IC (sat) =

12
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Zi = βre

Zi = RB II Bre

Zi =

13
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Zo = RC

Zo = Rc II ro

Zo =

14
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Av = - RC / re

Av =

15
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re = 26mV / IE

re =

16
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use approx. analysis which is:
Vb = (R2/R1+R2)VCC

if Bre > or equal to 10R2, then

17
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use exact analysis which is:
Vb = Eth - IBRth

Rth = 1/(1/R1 + 1/R2)

if Bre < 10R2, then

18
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approx. equal to IE

IC is alway