黄瓜
发表于 2025-3-23 10:00:06
,Die Bewegung der Luft in Folge Erwärmung,nal energy lost in the oscillatory system. To carry out the regeneration, a negative damping must be introduced into the resonator, which is tuned to the signal frequency, in one way or another. We will assume that negative damping is introduced into the resonator by some two-terminal device with negative conductivity.
Exclaim
发表于 2025-3-23 15:56:18
https://doi.org/10.1007/978-3-642-91530-7ired frequency and phase characteristics of the receivers, for example, to tune the receiving device to a given frequency or adjust its operating frequency within certain limits, adjust the selective properties of the receiver and set certain phase relationships during signal reception.
Absenteeism
发表于 2025-3-23 19:04:20
https://doi.org/10.1007/978-981-19-6215-8Selective Amplifiers; Digital Radio Devices; Noise Ratios; Pulse Diode Detectors; Automatic Gain Control
绊住
发表于 2025-3-24 00:25:44
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初次登台
发表于 2025-3-24 02:25:38
,Die Bewegung der Luft in Folge Erwärmung,The set of interconnected subsystems designed to detect and convert electromagnetic waves in order to extract the information contained in them is called a receiving system.
engrave
发表于 2025-3-24 06:39:29
https://doi.org/10.1007/978-3-662-33190-3Fluctuation noise acting in receiver circuits can be external or internal in origin. The former include cosmic noises, atmospheric noises, quantum noises of the signal and background illumination, and the latter include the EMF and currents arising in the receiver elements due to the chaotic movement of various carriers of electric charges.
Endoscope
发表于 2025-3-24 11:03:14
https://doi.org/10.1007/978-3-662-33190-3 of a radio receiver is a set of elements, located between the antenna and the input of the first stage of the receiver.
审问
发表于 2025-3-24 15:47:19
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Banquet
发表于 2025-3-24 19:53:19
https://doi.org/10.1007/978-3-662-33190-3A frequency converter in radio receivers is a device that transfers the spectrum of a radio signal from one region of the frequency range to another. In this case, the type and parameters of modulation of the converted signal remain unchanged.
Evacuate
发表于 2025-3-25 01:21:22
https://doi.org/10.1007/978-3-642-91530-7The detectors are designed to convert modulated radio signals into voltages (or currents) that change according to the modulation law. Depending on the modulated signal parameter, amplitude, frequency and phase detectors are distinguished.