Electronics Fundamentals: Circuits, Devices & Applications
8th Edition
ISBN: 9780135072950
Author: Thomas L. Floyd, David Buchla
Publisher: Prentice Hall
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Chapter 17, Problem 9P
Determine
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Question 2
A transistor is used as a switch and the waveforms are shown in Figure 2. The parameters are
Vcc = 225 V, VBE(sat) = 3 V, IB = 8 A, VCE(sat) = 2 V, Ics = 90 A, td = 0.5 µs, tr = 1 µs, ts = 3 µs, tƒ
= 2 μs, and f
10 kHz. The duty cycle is k 50%. The collector- emitter leakage current is
ICEO = 2 mA. Determine the power loss due to the collector current:
=
=
=
(a) during turn-on ton = td + tr
VCE
Vcc
(b) during conduction period tn
V CE(sat)
0
toff"
ton
Ics
0.9 Ics
(c) during turn-off toff = ts + tf
(d) during off-time tot
(e) the total average power losses PT
ICEO
0
IBS
0
Figure 2
V BE(sat)
0
主
*
td
tr
In
Is
If
to
iB
VBE
T= 1/fs
Question 1:
The beta (B) of the bipolar transistor shown in Figure 1 varies from 12 to 60. The load resistance
is Rc = 5. The dc supply voltage is VCC = 40 V and the input voltage to the base circuit is
VB = 5 V. If VCE(sat) = 1.2 V, VBE(sat) = 1.6 V, and RB = 0.8 2, calculate:
(a) the overdrive factor ODF.
(b) the forced ẞ
(c) the power loss in the transistor PT.
IB
VB
RB
+
V BE
RC
Vcc'
Ic
+
IE
Figure 1
VCE
I need help in creating a matlab code to find the currents
Chapter 17 Solutions
Electronics Fundamentals: Circuits, Devices & Applications
Ch. 17 - In a bipolar transistor, if the base-emitter...Ch. 17 - When a transistor is saturated. an increase in...Ch. 17 - Prob. 3TFQCh. 17 - The power gain of a CC amplifier is the same as...Ch. 17 - A class B amplifier is more efficient than a class...Ch. 17 - A JFET is always operated with the gate-source...Ch. 17 - Prob. 7TFQCh. 17 - The transconductance of a FET is the ratio of ac...Ch. 17 - Prob. 9TFQCh. 17 - The input to a feedback oscillator is only the...
Ch. 17 - The n-type regions in an npn bipolar junction...Ch. 17 - The n-region in a pnp transistor is the base...Ch. 17 - Prob. 3STCh. 17 - Prob. 4STCh. 17 - Prob. 5STCh. 17 - Alpha () is the ratio of collector current to...Ch. 17 - If the beta of a certain transistor operating in...Ch. 17 - If the base current of a transistor operating in...Ch. 17 - Prob. 9STCh. 17 - When the gate-to-source voltage of an n-channel...Ch. 17 - When a negative gate-to-source voltage is applied...Ch. 17 - Prob. 12STCh. 17 - If the capacitor from emitter to ground in a CE...Ch. 17 - When the collector resistor in a CE amplifier is...Ch. 17 - The input resistance of a CE amplifier is affected...Ch. 17 - The output signal of a CE amplifier is always in...Ch. 17 - The output signal of a common-collector amplifier...Ch. 17 - The largest theoretical voltage gain obtainable...Ch. 17 - In a class A amplifier, the output signal is...Ch. 17 - A class A amplifier conducts for 90 of input cycle...Ch. 17 - Prob. 21STCh. 17 - Feedback oscillators operate on the principle of...Ch. 17 - What is the value of IC for IE=5.34mA and IB=475A?Ch. 17 - Prob. 2PCh. 17 - Prob. 3PCh. 17 - In a certain transistor circuit, the base current...Ch. 17 - Find IB,IE, and in Figure 17-70 given that DC=0.98...Ch. 17 - The transistor in Figure 17-70 is replaced with...Ch. 17 - Prob. 7PCh. 17 - Prob. 8PCh. 17 - Determine IB,IC, and VC in Figure 17-72.Ch. 17 - For the circuit in Figure 17-73, find VB,VE,IE,IC,...Ch. 17 - In Figure 17-73, what is VCE? What are the Q-point...Ch. 17 - A transistor amplifier has a voltage gain of 50....Ch. 17 - To achieve an output of 10 V with an input of300...Ch. 17 - A 50 mV signal is applied to the base of a...Ch. 17 - Determine the voltage gain for Figure 17-74.Ch. 17 - Determine each of the dc voltages, VB,VC, and VE,...Ch. 17 - Determine the following dc values for the...Ch. 17 - Determine the following ac values for the...Ch. 17 - The amplifier in Figure 17-76 has a variable gain...Ch. 17 - If a load resistance of 600 is placed on the...Ch. 17 - Determine the voltage gain for the...Ch. 17 - What is the total input resistance in Figure...Ch. 17 - A load resistance is capacitively coupled in the...Ch. 17 - Prob. 24PCh. 17 - Determine the maximum peak output voltage and peak...Ch. 17 - The efficiency of a certain class B push-pull...Ch. 17 - Prob. 27PCh. 17 - The transistor in Figure 17-80 has a DC of 150....Ch. 17 - The VGS of ap-channel JFET is increased from 1 V...Ch. 17 - Why must the gate-to-source voltage of an...Ch. 17 - Draw the schematic symbols for n-channel and...Ch. 17 - Explain why both types of MOSFETs have an...Ch. 17 - In what mode is an n-channel D-MOSFET operating...Ch. 17 - A certain E-MOSFET has a VGS(th)=3V. What is the...Ch. 17 - For each circuit in Figure 17-81, determine VDS...Ch. 17 - Prob. 36PCh. 17 - Each E-MOSFET in Figure 17-83 has a VGS(th) of +5...Ch. 17 - Prob. 38PCh. 17 - Find the gain of each amplifier in Figure 17-85.Ch. 17 - Determine the gain of each amplifier in Figure...Ch. 17 - If the voltage gain of the amplifier portion of a...Ch. 17 - Generally describe the change required to the...Ch. 17 - Prob. 43PCh. 17 - Prob. 44PCh. 17 - Prob. 47PCh. 17 - Prob. 48PCh. 17 - Prob. 49PCh. 17 - Prob. 50PCh. 17 - Prob. 51PCh. 17 - Prob. 52PCh. 17 - Open file P17-53. Determine if the circuit is...
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