Rodent
发表于 2025-3-23 13:01:58
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interference
发表于 2025-3-23 16:37:06
Electrical Noise“hum” in an audio signal are typical electrical noise manifestations. Noise mainly affects receiving systems, where it sets the minimum signal level that it is possible to recover before it becomes swamped by the noise. We note that amplifying a signal already mixed with noise does not help the sign
gorgeous
发表于 2025-3-23 18:24:36
Radio Receiver Architecturea very creative manner. The inner structure of signal waveforms (such as a voice, for example) is revealed by Fourier transformations, which enables us to design appropriate filters and amplifiers. By using Fourier theory we are able to both synthesize and decompose waveforms that are continuous (i.
无聊的人
发表于 2025-3-23 23:55:51
Electrical Resonancepotential forms. In the absence of friction (i.e. energy dissipation), a pendulum would oscillate forever. Similarly, after two ideal electrical elements capable of storing energy (a capacitor and an inductor) are connected in parallel then the total initial energy of the system bounces back and for
灯丝
发表于 2025-3-24 04:54:25
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STENT
发表于 2025-3-24 06:40:04
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钝剑
发表于 2025-3-24 10:39:54
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殖民地
发表于 2025-3-24 16:18:53
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Fortuitous
发表于 2025-3-24 19:04:15
Modulationor instance, while listening to a steady single-tone signal with constant amplitude and frequency coming out of a speaker, we merely receive the simplest message that conveys information only about the existence of the signal source and nothing else. If the source is turned off, then we cannot even
不能仁慈
发表于 2025-3-25 00:43:16
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