搜尋結果
Wireless LAN (WLAN) channels are frequently accessed using IEEE 802.11 protocols. The 802.11 standard provides several radio frequency bands for use in Wi-Fi communications, each divided into a multitude of channels numbered at 5 MHz spacing (except in the 45/60 GHz band, where they are 0.54/1.08/2.16 GHz apart) between the centre frequency of the channel.
Hong Kong [d] is a special administrative region of the People's Republic of China. With 7.4 million residents of various nationalities [e] in a 1,104-square-kilometre (426 sq mi) territory, Hong Kong is one of the most densely populated territories in the world. Hong Kong was established as a colony of the British Empire after the Qing dynasty ...
- Schematic Symbol
- Analog Voltmeter
- Amplified Voltmeter
- Digital Voltmeter
- See Also
- External Links
In circuit diagrams, a voltmeter is represented by the letter Vin a circle, with two emerging lines representing the two points of measurement.
A moving coil galvanometer can be used as a voltmeter by inserting a resistor in serieswith the instrument. The galvanometer has a coil of fine wire suspended in a strong magnetic field. When an electric current is applied, the interaction of the magnetic field of the coil and of the stationary magnet creates a torque, tending to make the coil rota...
The sensitivity and input resistance of a voltmeter can be increased if the current required to deflect the meter pointer is supplied by an amplifier and power supply instead of by the circuit under test. The electronic amplifier between input and meter gives two benefits; a rugged moving coil instrument can be used, since its sensitivity need not ...
A digital voltmeter (DVM) measures an unknown input voltage by converting the voltage to a digital value and then displays the voltage in numeric form. DVMs are usually designed around a special type of analog-to-digital converter called an integrating converter. DVM measurement accuracy is affected by many factors, including temperature, input imp...
DC Metering Circuits chapter from Lessons In Electric Circuits Vol 1 DC free ebook and Lessons In Electric Circuitsseries.
Semiconductor. Industry. Nanoelectronics. v. t. e. A semiconductor is a material that has an electrical conductivity value falling between that of a conductor, such as copper, and an insulator, such as glass. Its resistivity generally falls as its temperature rises; metals behave in the opposite way. [1]
Tencent Holdings Ltd. (Chinese: 腾讯; pinyin: Téngxùn) is a Chinese multinational technology conglomerate and holding company headquartered in Shenzhen. It is one of the highest grossing multimedia companies in the world based on revenue. It is also the world's largest company in the video game industry based on its equity investments ...
Fùshìkāng. Bopomofo. ㄈㄨˋㄕˋㄎㄤ. Hon Hai Precision Industry Co. Ltd., trading as Hon Hai Technology Group in China and Taiwan, and as Foxconn internationally, is a Taiwanese multinational electronics contract manufacturer established in 1974 with headquarters in Tucheng District, New Taipei City, Taiwan. In 2021, the company's ...
AMD. Advanced Micro Devices, Inc. ( AMD) is an American multinational corporation and semiconductor company based in Santa Clara, California, that develops computer processors and related technologies for business and consumer markets. AMD's main products include microprocessors, motherboard chipsets, embedded processors and graphics processors ...
