2024 No Nonsense Extra Class License Study Guide (ePub)

Description

NOTE: This is the 2024 version of the No Nonsense Extra Class License Study Guide. This study guide is for tests given after July 1, 2024.

The “No Nonsense” series of amateur radio license study guides has become famous for helping people pass the tests. Written in a simple, easy-to-understand style, this study guide will help you upgrade to Amateur Extra Class in no time. I guarantee it! If this book doesn’t help you pass the test, I’ll give you your money back.

Here’s a sample of the text:

Calculating the gain and output voltage of an op amp circuit is relatively straightforward. The gain is simply RF/Rin. In the op amp circuit shown in Figure E7-3, Rin = R1. The output voltage of a circuit is then the input voltage times the gain.

QUESTION: What magnitude of voltage gain can be expected from the circuit in Figure E73 when R1 is 10 ohms and RF is 470 ohms? (E7G07)
ANSWER: 47

If R1 is 10 ohms and RF is 470 ohms, the gain is 470/10, or 47.

While the gain of an ideal operational amplifier does not vary with frequency, op amps in the real world do have a finite bandwidth. Some modern op amps can be used at high frequencies, but many of the older ones can’t be used at frequencies above a couple of MHz. To find out if you can use an op amp at the frequency of your signals, check out the gain-bandwidth specification. The gain-bandwidth specification is the frequency at which the open-loop gain of the amplifier equals one.

QUESTION: How does the gain of an ideal operational amplifier vary with frequency? (E7G08)
ANSWER: It does not vary with frequency

QUESTION: What is the gain-bandwidth of an operational amplifier? (E7G06)
ANSWER: The frequency at which the open-loop gain of the amplifier equals one

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