EBK PRINCIPLES OF ELECTRIC CIRCUITS
10th Edition
ISBN: 9780134880068
Author: Buchla
Publisher: VST
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Chapter 6, Problem 21RP
The amplifier in one channel of a stereo system as shown in Figure 6-41 drives two speakers. If the maximum voltage to the speakers is 15 V, how much power must the amplifier be able to deliver to the speakers?
FIGURE 6-41
If the amplifier can produce a maximum of 18 V, what is the maximum total power to the speakers?
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6) For each independent source in this circuit calculate
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In this experiment, we are going to use a 2N3904 BJT. Examine the data sheet for this device
carefully. In particular, make a note of the current gain (identified by hFE).
1. Obtain the curve trace for a "Darlington Pair" of Bipolar Junction Transistors. A Darlington
Pair consists of two transistors with the first BJT driving the base terminal of the second
transistor as shown in Figure 1 below.
A. Set up the primary sweep voltages for V1 the same as shown in the lecture notes (see
the Darlington pair IV curve).
B. Set up the secondary sweep currents for 11 to be an order of magnitude smaller than
for the single BJT. In the Sweep Type box choose linear and enter the following 3
values: Start Value: 0, End Value: 8u and Increment: 1u (see lecture notes).
C. Describe the primary differences you observe between the single BJT Curve Trace and
that of the Darlington Pair. Discuss what might cause each difference.
Q1
11
Q2
V1
Q2N3904
Figure 1. A Darlington Pair of 2N3904 transistors in a…
2. Using the IV plots shown in Fig. 3 (and found in the reintroduction to PSpice) design a BJT
biasing circuit that results in the following parameters: VCE = 2 Vand ig = 40 μA. We
also require the power supply to be fixed at 5 Volts (this is where the load line intercepts
the iB =ic = 0 line). You may use the circuit shown in Example 1. Note that all resistor
values in Example 1 must be recalculated. Your solution for the base to ground and base
to collector resistors may not be unique.
Chapter 6 Solutions
EBK PRINCIPLES OF ELECTRIC CIRCUITS
Ch. 6 - Five resistors are positioned on a protoboard as...Ch. 6 - How would you connect all of the resistors in...Ch. 6 - If a third branch is added to the circuit in...Ch. 6 - Determine IT and I2 if a fourth branch is added to...Ch. 6 - How much current will an ammeter measure when it...Ch. 6 - When the brake lights are applied, the total...Ch. 6 - If a 33 resistor is connected in parallel in...Ch. 6 - Calculate the total resistance connected to the...Ch. 6 - If two of the speakers are removed, what is the...Ch. 6 - The basic circuit for a rear window defroster can...
Ch. 6 - If you need to obtain a total resistance of 130 ,...Ch. 6 - Sometimes a direct measurement of resistance is...Ch. 6 - Determine the current through RL in Figure 6-0...Ch. 6 - Figure 6-35 Determine the current through each...Ch. 6 - Determine the total amount of power in the...Ch. 6 - The amplifier in one channel of a stereo system as...Ch. 6 - In Figure 6-51, there is a total current of 31.09...Ch. 6 - Your ohmmeter indicates 9.6 k between pin 2 and...Ch. 6 - A 330 resistor, a 270 resistor, and a 68 ...Ch. 6 - Refer to Figure 6-83 If R7 opens, the resistance...Ch. 6 - Determine whether or not all the resistors in...Ch. 6 - The following currents are measured in the same...Ch. 6 - There is a total of 500 mA of current into five...Ch. 6 - In the circuit of Figure 6-65, determine the...Ch. 6 - The electrical circuit in a room has a ceiling...Ch. 6 - The following resistors are connected in parallel:...Ch. 6 - What is the total current in each circuit of...Ch. 6 - Find the values of the unspecified quantities...Ch. 6 - What is the current through each resistor in...Ch. 6 - Determine all of the resistor values in Figure...
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