SYN
发表于 2025-3-26 21:33:06
Ultrahigh Frequencies,l energy. The differences between low-frequency and ultrahigh-frequency electric waves do not appear abruptly at any particular frequency. Although barely perceptible, they start in the low megahertz range and increase with frequency until they are quite prominent above 100 MHz. Some of the derivati
PRE
发表于 2025-3-27 02:58:43
Sine Wave Oscillators,e or negative feedback at the emitter, or source, of those stages of amplification. This negative feedback reduced the amplification of the stage. Although there are other ways in which negative feedback can be obtained in circuits, we are not interested in negative feedback at this time.
诱骗
发表于 2025-3-27 08:19:48
Wave Shaping,sinusoidal and square waveforms were covered in the preceding chapters. This chapter deals with the methods used to modify the shapes of waveforms including clipping, clamping, differentiating, and integrating.
overhaul
发表于 2025-3-27 12:17:22
Radio and Television,l. This will be followed by a study of certain circuits used only in frequency modulation (FM) radio receivers. Selected circuits unique to television (TV) receivers will then be discussed. Since integrated circuits will be discussed in a later chapter, these circuits, to be studied now, are all composed of discrete components.
amphibian
发表于 2025-3-27 15:05:35
Thyristors,rolled recifier (SCR), light activated SCR (LASCR), silicon-controlled switch (SCS), and the TRIAC. In this chapter we will study two of these thyristors. A detailed study of the SCR will be followed by a brief study of the TRIAC.
上釉彩
发表于 2025-3-27 21:19:13
Rüdiger Hoffmann,Matthias Wolffltaneously. The use of dual-beam oscilloscopes permits one to do this. Another technique, usable with or without the above, is to photograph the waveforms, making multiple exposures on the same print. This technique was used with a dual-beam oscilloscope by the author in preparing the photographs of waveforms presented in this book.
大约冬季
发表于 2025-3-27 22:33:29
Nik Widmann,Stefan Kollarits,Florian Hiltived in the action. Thus they are called bipolar junction transistors or BJTs. There are two different kinds of bipolar junction transistors, . and .. Each of these devices is a single crystalline structure and is not composed of three separate crystals.
muscle-fibers
发表于 2025-3-28 04:16:34
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卷发
发表于 2025-3-28 08:40:34
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Parameter
发表于 2025-3-28 12:58:00
Square Wave Circuits,o be in either the cutoff state or saturation. When a transistor is saturated the maximum current is flowing because all of the available current carriers are being used. When a silicon bipolar junction transistor is saturated, the voltage across it, from emitter to collector, is about 0.3 V.