在"英语"词典里automatic frequency control}的意思

在英语中AUTOMATIC FREQUENCY CONTROL的发音

automatic frequency control

AUTOMATIC FREQUENCY CONTROL在英语中的意思是什么？

自动频率控制

Automatic frequency control

在无线电设备中，自动频率控制，也称为自动微调，是一种自动保持谐振电路调谐到输入无线电信号频率的方法或电路。 它主要用于无线电接收机，以将接收机调谐到所需站的频率。 在无线电通信中，需要AFC，因为在接收机的带通频率被调谐到发射机的频率之后，两个频率可能会分开，中断接收。 这可能是由于控制不良的发射机频率引起的，但是最常见的原因是由于电子元件的值的热或机械漂移，接收机的中心带通频率的漂移。 假设接收机几乎被调谐到期望的频率，则接收机中的AFC电路产生与接收机失谐程度成比例的误差电压。 然后将该误差电压反馈到调谐电路，使得调谐误差降低。 在大多数频率调制检测器中，这种类型的误差电压很容易获得。 见负反馈。

In radio equipment, Automatic Frequency Control, also called Automatic Fine Tuning, is a method or circuit to automatically keep a resonant circuit tuned to the frequency of an incoming radio signal. It is primarily used in radio receivers to keep the receiver tuned to the frequency of the desired station. In radio communication, AFC is needed because, after the bandpass frequency of a receiver is tuned to the frequency of a transmitter, the two frequencies may drift apart, interrupting the reception. This can be caused by a poorly controlled transmitter frequency, but the most common cause is drift of the center bandpass frequency of the receiver, due to thermal or mechanical drift in the values of the electronic components. Assuming that a receiver is nearly tuned to the desired frequency, the AFC circuit in the receiver develops an error voltage proportional to the degree to which the receiver is mistuned. This error voltage is then fed back to the tuning circuit in such a way that the tuning error is reduced. In most frequency modulation detectors, an error voltage of this type is easily available. See Negative feedback.

在英语 词典里automatic frequency control的定义

字典中的自动频率控制的定义是无线电或电视接收机中的系统，通过该系统可以精确地维持输入信号的调谐AFC。

AUTOMATIC FREQUENCY CONTROL的翻译

通过我们的英语多语言翻译器,找到automatic frequency control的25种语言翻译

该章节所呈现的将automatic frequency control由 英语向其他语言的翻译是通过自动统计翻译获得的；在英语中基本的翻译单位是单词«automatic frequency control»。

• 翻译者英语 - 中文: 自动频率控制
• 翻译者英语 - 西班牙语: control automático de frecuencia
• 英语: automatic frequency control
• 翻译者英语 - 印地语: स्वत: आवृत्ति नियंत्रण
• 翻译者英语 - 阿拉伯语: تردد مراقبة التلقائي
• 翻译者英语 - 俄语: автоматическое управление частотой
• 翻译者英语 - 葡萄牙语: controle de freqüência automática
• 翻译者英语 - 孟加拉语: স্বয়ংক্রিয় ফ্রিকোয়েন্সি নিয়ন্ত্রণ
• 翻译者英语 - 法语: commande automatique de fréquence
• 翻译者英语 - 马来语: Kawalan kekerapan automatik
• 翻译者英语 - 德语: automatische Frequenzsteuerung
• 翻译者英语 - 日语: 自動周波数制御
• 翻译者英语 - 韩语: 자동 주파수 제어
• 翻译者英语 - 印尼爪哇语: Kontrol frekuensi otomatis
• 翻译者英语 - 越南语: Kiểm soát tần số tự động
• 翻译者英语 - 泰米尔语: தானியங்கி அதிர்வெண் கட்டுப்பாடு
• 翻译者英语 - 马拉地语: स्वयंचलित वारंवारता नियंत्रण
• 翻译者英语 - 土耳其语: Otomatik frekans kontrolü
• 翻译者英语 - 意大利语: controllo automatico della frequenza
• 翻译者英语 - 波兰语: automatyczna regulacja częstotliwości
• 翻译者英语 - 乌克兰语: автоматичне керування частотою
• 翻译者英语 - 罗马尼亚语: control automat de frecvență
• 翻译者英语 - 希腊语: αυτόματης ρύθμισης συχνότητας
• 翻译者英语 - 布尔语(南非荷兰语): outomatiese frekwensie beheer
• 翻译者英语 - 瑞典语: automatisk frekvensstyrning
• 翻译者英语 - 挪威语: automatisk frekvenskontroll

与 «AUTOMATIC FREQUENCY CONTROL»相关的英语书籍

在以下的参考文献中发现automatic frequency control的用法。与automatic frequency control相关的书籍以及同一来源的简短摘要提供其在 英语文献中的使用情境。

CONTROL ENGINEERING: THEORY AND PRACTICE

Automatic frequency control in the radio communication system is also another example of a closed-loop control system. Figure 1.5 shows a schematic diagram of a superheterodyne receiver with the automatic frequency control system. Here  ...

M. N. BANDYOPADHYAY, 2002

Modern Dictionary of Electronics

Similar to automatic frequency control. automatic focusing — A method of electrostatically focusing a television picture tube; the focusing anode is internally connected through a resistor to the cathode and thus requires no external focusing ...

Rudolf F. Graf, 1999

Newnes Dictionary of Electronics

This is necessary to ensure correct colour rendering in spite of variations in signal level at the receiver input. automatic contrast control See automatic gain control. automatic frequency control (AFC) A circuit in a receiver which ensures that ...

S W Amos, Roger Amos, 2002

Microtron: Development and Applications

Dependence of the average current of accelerated electrons on the magnitude of the magnetron anode current: a — with automatic frequency control, fc — without automatic frequency control. The automatic frequency control system normally ...

Yuri M. Tsipenyuk, 2001

Comprehensive Dictionary of Electrical Engineering, Second ...

The circuit is sometimes called the automatic frequency control. See also automatic frequency control (AFC). automatic focusing on an optical disk, the process in which the distance from the objective focal plane of the disk is continuously ...

Philip A. Laplante, 2005

Comprehensive Dictionary of Electrical Engineering

See also automatic frequency control (AFC). automatic focusing on an optical disk, the ... in focus. automatic frequency control (AFC) electronic circuitry used to keep the received signal properly placed within the desired IF frequency range.

Phillip A. Laplante, 1999

Monochrome and Colour Television

... 493 ADG (automatic degaussing) circuit, 509, 522 Adjacent channel interference, 154 Aeroplane flutter, 263 AFC (automatic frequency control) tuner, 576 AFC (automatic frequency control) horizontal, 312, 320 AFPC (automatic frequency ...

R.R. Gulati, 2007

Build Your Own Low-power Transmitters: Projects for the ...

The traditional analog slide rule dial has largely disappeared from the higher-end FM receivers, replaced by LCD or LED readouts. Therefore, the digitally tuned receiver has no need for fine-tuning or automatic frequency control and cannot ...

Rudolf F. Graf, William Sheets, 2001

Operation, Echo Box TS-488A/UP.

Refer to appropriate radar manual for corrective measures. 2-33. TRANSMITTER FREQUENCY PULLING OF RADAR WITH PPI INDICATOR. a. Turn off the automatic frequency control on the radar receiver. b. With the radar antenna stopped ...

Fundamentals of Single-sideband Communication

Automatic-gain-control circuits and automatic-frequency control squelch circuits have been omitted for the simplification. Automatic-gain-control circuits that operate with pilot or reduced carrier ssb signals are described in paragraph 62.

United States. Dept. of the Army, United States. Dept. of the Air Force, 1961

包含词语«AUTOMATIC FREQUENCY CONTROL»的新条目

找出国内和国际出版社所讨论的内容，以及词语automatic frequency control在以下新条目的上下文中是如何使用的。

Silicon Vision Announces Bluetooth Low Energy Radio IP SIG …

... Gain Control), AFC (Automatic Frequency Control), State Machine, 4-Wire SPI Interface, Automatic Calibrators for RF/Analog blocks, Bias and ... «Design and Reuse, 一月 15»

Using Sonobond's Ultrasonic Welding System to Weld Tin-Coated …

Sonobond equipment also includes features such as overload protection and automatic frequency control, and when fitted with an optional ... «Azom.com, 八月 14»

Renewed hope for EmDrive with NASA validation ... is this a …

Future test plans include the development of an automatic frequency control circuit. Test results indicate that the RF resonant cavity thruster ... «Next Big Future, 八月 14»

Phase-locked loop triumph

Arguably, the AFC (automatic frequency control) on an old-fashioned non-synthesised FM receiver is a rather elaborate PLL. A long time ago, ... «ElectronicsWeekly.com, 七月 14»

A Mod Solves Transmitter Troubles

It would open without warning, causing the exciter automatic frequency control to move the modulated oscillator to a new frequency and then ... «Radio World, 六月 11»

Microsoft Files Patent for Wireless Charging Pad

"A charging device as described herein can utilize a sensor-integrated resonating circuit with automatic frequency control to prove low-cost ... «eWeek, 二月 10»