Note that all capacitors are large so that their impedance is negligible at signal frequencies of interest. npn equations active Ic Ise VBE/VT = IB = (Is/B)eVB VBE/VT IE = (Is/α)еVB VBE/VT Ic=ẞIB_IС = αIE B α α = B = B+1 1-α Ic α Im Υπ re To= VT 9m Im 550 VA 4. BJT amplifier == The transistor in the circuit below has ẞ 100 and VBE = 0.7 V in forward bias. Ignore the Early effect and use VT = 25 mV. Determine values for Rc and RE so that the transcon- ductance is 9m 80 m¹ and the amplifier gain is A = 100. What is the purpose of the capacitor connected to the base? = Vsig + 9 V 9 V 100 k RC RE H Vout
Note that all capacitors are large so that their impedance is negligible at signal frequencies of interest. npn equations active Ic Ise VBE/VT = IB = (Is/B)eVB VBE/VT IE = (Is/α)еVB VBE/VT Ic=ẞIB_IС = αIE B α α = B = B+1 1-α Ic α Im Υπ re To= VT 9m Im 550 VA 4. BJT amplifier == The transistor in the circuit below has ẞ 100 and VBE = 0.7 V in forward bias. Ignore the Early effect and use VT = 25 mV. Determine values for Rc and RE so that the transcon- ductance is 9m 80 m¹ and the amplifier gain is A = 100. What is the purpose of the capacitor connected to the base? = Vsig + 9 V 9 V 100 k RC RE H Vout
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
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i need help insolving the following question please

Transcribed Image Text:Note that all capacitors are large so that their impedance is negligible at signal frequencies
of interest.
npn equations
active Ic Ise
VBE/VT
=
IB = (Is/B)eVB
VBE/VT
IE = (Is/α)еVB
VBE/VT
Ic=ẞIB_IС = αIE
B
α
α =
B =
B+1
1-α
Ic
α
Im
Υπ
re
To=
VT
9m
Im
550
VA

Transcribed Image Text:4. BJT amplifier
==
The transistor in the circuit below has ẞ 100 and VBE = 0.7 V in forward bias. Ignore the
Early effect and use VT = 25 mV. Determine values for Rc and RE so that the transcon-
ductance is 9m
80 m¹ and the amplifier gain is A = 100. What is the purpose of the
capacitor connected to the base?
=
Vsig
+ 9 V
9 V
100 k
RC
RE
H
Vout
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