Public telephone operators and new independent wireless operators through- out the world are deploying wireless access in an effort to drastically reduce delivery costs in the most expensive part of the network?the local loop. Available radio technology enables both existing and new entrants to access subscribers in a rapid manner and deliver their basic telephony products and broadband-enhanced services.
標簽： Transmission Handbooks Systems Design
上傳時間： 2020-06-01
上傳用戶：shancjb
The planarization technology of Chemical-Mechanical-Polishing (CMP), used for the manufacturing of multi- level metal interconnects for high-density Integrated Circuits (IC), is also readily adaptable as an enabling technology in MicroElectroMechanical Systems (MEMS) fabrication, particularly polysilicon surface micromachining. CMP not only eases the design and manufacturability of MEMS devices by eliminating several photolithographic and film issues generated by severe topography, but also enables far greater flexibility with process complexity and associated designs. T
標簽： mechanical polishing Chemical
上傳時間： 2020-06-06
上傳用戶：shancjb
Radio frequency identifi cation (RFID) technology is a wireless communication technology that enables users to uniquely identify tagged objects or people. RFID is rapidly becoming a cost-effective technology. This is in large part due to the efforts of Wal-Mart and the Department of Defense (DoD) to incorporate RFID technology into their supply chains. In 2003, with the aim of enabling pallet-level tracking of inventory, Wal-Mart issued an RFID mandate requiring its top suppliers to begin tagging pallets and cases, with Electronic Product Code (EPC) labels. The DoD quickly followed suit and issued the same mandate to its top 100 suppliers. This drive to incorporate RFID technology into their supply chains is motivated by the increased ship- ping, receiving and stocking effi ciency and the decreased costs of labor, storage, and product loss that pallet-level visibility of inventory can offer.
標簽： A_Guide_to_Radio_Frequency_IDenti fication RFID
上傳時間： 2020-06-08
上傳用戶：shancjb
Internet of Things (IoT) [26] is a new networking paradigm for cyber-physical systems that allow physical objects to collect and exchange data. In the IoT, physical objects and cyber-agents can be sensed and controlled remotely across existing network infrastructure, which enables the integration between the physical world and computer-based systems and therefore extends the Internet into the real world. IoT can find numerous applications in smart housing, environmental monitoring, medical and health care systems, agriculture, transportation, etc. Because of its significant application potential, IoT has attracted a lot of attention from both academic research and industrial development.
標簽： Technologies Internet Things RFID for of
上傳時間： 2020-06-08
上傳用戶：shancjb
Radio frequency identification (RFID) and Wireless sensor networks (WSN) are the two key wireless technologies that have diversified applications in the present and the upcoming systems in this area. RFID is a wireless automated recognition technology which is primarily used to recognize objects or to follow their posi- tion without providing any sign about the physical form of the substance. On the other hand, WSN not only offers information about the state of the substance and environment but also enables multi-hop wireless communications.
標簽： Architecture Integrated RFID-WSN
上傳時間： 2020-06-08
上傳用戶：shancjb
Of the various applications that satellites have been used for, one of the most promising is that of global positioning. Made possible by Global Navigation Satellite Systems, global positioning enables any user to know his or her exact position on Earth. Nowadays, the only fully functioning system is the American Global Positioning System (GPS). However, the European system, known as Galileo, is expected to be operative in 2012.
上傳時間： 2020-06-09
上傳用戶：shancjb
This reference design describes the design of a 3-phase AC induction vector control drive with position encoder coupled to the motor shaft. It is based on Motorola’s DSP56F805 dedicated motor control device. AC induction motors, which contain a cage, are very popular in variable speed drives. They are simple, rugged, inexpensive and available at all power ratings. Progress in the field of power electronics and microelectronics enables the application of induction motors for high-performance drives, where traditionally only DC motors were applied. Thanks to sophisticated control methods, AC induction drives offer the same control capabilities as high performance four-quadrant DC drives.
標簽： Reference Designer Manual Phase DRM 023 AC
上傳時間： 2020-06-10
上傳用戶：shancjb
SCB10H series pressure elements are high performance absolute pressure sensors. The sensors are based on Murata's proven capacitive 3D-MEMS technology. They enable exceptional possibility for OEM customers to integrate pressure measurement function in an optimal way into their products. SCB10H series elements can be designed to match the application specific pressure range. It is a bare capacitive sensor element that enables optimized application specific package and electronics design.
標簽： 傳感器
上傳時間： 2022-03-03
上傳用戶：
The GL823K integrates a high speed 8051 microprocessor and a high efficiency hardware engine for the best data transfer performance between USB and flash card interfaces. Its pin assignment design fits to card sockets to provide easier PCB layout. Inside the chip, it integrates 5V to 3.3V regulator, 3.3V to 1.8V regulator and power MOSFETs and it enables the function of on-chip clock source (OCCS) which means no external 12MHz XTAL is needed and that effectively reduces the total BOM cost.
上傳時間： 2022-04-27
上傳用戶：qdxqdxqdxqdx
RX-8801 SA Features built-in 32.768 kHz DTCXO, High Stability Supports l'C-Bus's high speed mode (400 kHz)Alarm interrupt function for day, date, hour, and minute settings Fixed-cycle timer interrupt function Time update interrupt function32.768 kHz output with OE function Auto correction of leap years Wide interface voltage range: 2.2 V to 5.5 V Wide time-keeping voltage range:1.8 V to 5.5 V Low current consumption: 0.84A/3V (Typ.)is an IC bus interface-compliant real-time clock which includes a 32.768 kHz DTCXO In addition to providing a calendar (year, month, date, day, hour, minute, second) function and a clock counter function, this module provides an abundance of other functions including an alarm function, fixed-cycle timer unction, time update interrupt function, and 32.768 kHz output function.The devices in this module are fabricated via a C-MOS process for low current consumption, which enables ong-term battery back-up.
上傳時間： 2022-06-17
上傳用戶：
