Find the answer (in Volts) to Question 2 in the attached image where: VCC = 47 Volts, RC = 4.1 kOhms, RE = 2.1 kOhms, VBE(sat) = 0.6 Volts, VCE(sat) = 0.2 Volts and A = 1.0 Volts.   Provide your answer rounded to 2 decimal places.

Introductory Circuit Analysis (13th Edition)
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ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
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Find the answer (in Volts) to Question 2 in the attached image where:

VCC = 47 Volts, RC = 4.1 kOhms, RE = 2.1 kOhms,

VBE(sat) = 0.6 Volts, VCE(sat) = 0.2 Volts and

A = 1.0 Volts.

 

Provide your answer rounded to 2 decimal places.

Questions 1 - 3
Consider the circuit shown in Figure 1 where Vcc is a fixed voltage. The voltage
at the base of the transistor, v (t), is a time varying waveform described by
(1).
v (t) = Vß + v₂ (t)
Where VB is a DC offset and v (t) is a time varying, purely AC signal.
Suppose the amplitude of v, (t) is A and we make the following assumptions:
• The capacitor C is sufficiently large so that it can be considered to be a
short circuit at the signal frequencies
• Rc and RE are known
• R» Rc
• UBE=UBE (sat)
• ß» 1 in the active region
• VBE(sat) and VCE(sat) are known
UB
Vcc
ww
Rc
C
RE
علیه
R
(1)
Figure 1: Circuit for Questions 1 3.
-
Question 2
In addition to the assumptions outlined above, assume that Vcc is known.
1. Find the minimum value of VB required to ensure that the transistor re-
mains in the active region at all times.
Transcribed Image Text:Questions 1 - 3 Consider the circuit shown in Figure 1 where Vcc is a fixed voltage. The voltage at the base of the transistor, v (t), is a time varying waveform described by (1). v (t) = Vß + v₂ (t) Where VB is a DC offset and v (t) is a time varying, purely AC signal. Suppose the amplitude of v, (t) is A and we make the following assumptions: • The capacitor C is sufficiently large so that it can be considered to be a short circuit at the signal frequencies • Rc and RE are known • R» Rc • UBE=UBE (sat) • ß» 1 in the active region • VBE(sat) and VCE(sat) are known UB Vcc ww Rc C RE علیه R (1) Figure 1: Circuit for Questions 1 3. - Question 2 In addition to the assumptions outlined above, assume that Vcc is known. 1. Find the minimum value of VB required to ensure that the transistor re- mains in the active region at all times.
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