July 2012
Beginner
576 pages
9h 46m
English
Content preview from Complete Electronics Self-Teaching Guide with Projects
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Self-Test
These questions test your understanding of the concepts and equations presented in this chapter. Use a separate sheet of paper for your diagrams or calculations. Compare your answers with the answers provided following the test.
1. What are the three sections necessary in an oscillator?_____
2. What is the difference between positive and negative feedback?_____
3. What type of feedback is required in an oscillator?_____
4. What is the formula for the frequency of an oscillator?_____
5. Draw the circuit for a Colpitts oscillator.
6. Draw the circuit for a Hartley oscillator.
7. Draw the circuit for an Armstrong oscillator.
8. Problems 27–30 give a design procedure for oscillators. How well do the circuits in problem 35 fulfill the criteria for that procedure? In other words, check the values of Vf, AV (for a common emitter amplifier), C1/C2 ratio, RC/Z ratio, and the frequency.
A. _____
B. _____
C. _____
D. _____
9. For the circuit shown in Figure 9.38, calculate the values of C1, C2, CC, and CB for an oscillator with an output frequency of 10 kHz using a 100 mH coil.
Answers to Self-Test
If your answers do not agree with those provided here, review the problems indicated in parentheses before you go on to Chapter 10.
| 1. | An amplifier, feedback, and a resonant load. | (problem 1) |
| 2. | Positive feedback is “in phase” with the input, and negative feedback is “out of phase” with the input. | (problems 2–3) |
| 3. | Positive feedback. | (problem 3) |
| 4. | (problem 11) ... |
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.