Chapter 6
Video and Radio Frequency Amplifiers
LEARNING OBJECTIVES
Learning objectives serve as a preview of the information you are expected to learn in this chapter.
The comprehensive check-on-learning questions, found at the end of the chapter, are based on the
objectives. Upon completion of this chapter, you will be able to perform the following learning
objectives:
Define the term "bandwidth of an amplifier."
Determine the upper and lower frequency limits of an amplifier from a
frequency-response curve.
List two techniques used to increase the high-frequency response for a video
amplifier.
State one technique used to increase the low-frequency response of a video
amplifier.
Identify the purpose of various components on a schematic of a complete
typical video amplifier circuit.
State the purpose of a frequency-determining network in an RF amplifier.
State one method by which an RF amplifier can be neutralized.
Identify the purpose of various components on a schematic of a complete
typical RF amplifier.
INTRODUCTION TO VIDEO AND RADIO FREQUENCY AMPLIFIERS
6-1.
In this chapter you will be given information on the frequency response of
amplifiers as well as specific information on video and RF amplifiers. For all practical
purposes, all the general information you learned about audio amplifiers in chapter 5 will
apply to the video and RF amplifiers.
6-2.
You need to learn about video and RF amplifiers and understand these circuits
because you will probably be involved in working on equipment in which these circuits are
used. Many of the circuits shown in this chapter and chapter 7 are incomplete and would
not be used in actual equipment. For example, the complete biasing network may not be
shown. This is done so you can concentrate on the concepts being presented without being
overwhelmed by an abundance of circuit elements. The information that is presented in this
chapter is real, practical information about video and RF amplifiers. It is the kind of
information that you will use in working with these circuits. Engineering information (such
as design specifications) will not be presented because it is not needed to understand the
concepts that you need to perform the job of circuit analysis and repair.
23 June 2005
TC 9-62
6-1
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