Electronic Devices - Power Amplifiers - Discussion
Discussion Forum : Power Amplifiers - General Questions (Q.No. 7)
7.
Refer to this figure. The dc voltage on the collector, VC, is
Discussion:
4 comments Page 1 of 1.
Myr Magara said:
2 years ago
@Migs.
An important assumption is that Ib is approx 0 or negligible.
An important assumption is that Ib is approx 0 or negligible.
Frank Asigbi said:
4 years ago
According to me, the formula is;
VB =(R2/(R1+R2))*VCC.
VB =(R2/(R1+R2))*VCC.
Migs said:
6 years ago
1.
VB = (R1/(R1+R2))*VCC
VB = (10K/(47K+10K))*12
VB = 2.105V
2.
VE = VB - VBE
VE = 2.105V - 0.7V
VE = 1.405V
3.
IE = VE/RE
IE = 1.405/1K
IE = 1.405mA
4.
IC = IE
IC = 1.405mA
5.
VC = VCC - IC*RC
VC = 12 - (1.405mA)(4.7K)
VC = 5.3965V = 5.4V
VB = (R1/(R1+R2))*VCC
VB = (10K/(47K+10K))*12
VB = 2.105V
2.
VE = VB - VBE
VE = 2.105V - 0.7V
VE = 1.405V
3.
IE = VE/RE
IE = 1.405/1K
IE = 1.405mA
4.
IC = IE
IC = 1.405mA
5.
VC = VCC - IC*RC
VC = 12 - (1.405mA)(4.7K)
VC = 5.3965V = 5.4V
(4)
Kaz said:
9 years ago
The figure is not displaying. How could we refer?
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