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 1. Course project - Development of A 900 MHz am transceiver | Компас
Introduction 4
1.About 900 MHz transmitters and receivers 5
1.1About 900 MHz transmitters and receivers 5
1.2Schematic diagram 6
2.Parsing the transmitter 11
2.1Transmitter details 11
2.2Transmitter design 13
2.3Setting up the transmitter 15
3.Variants of the transmitter 19
3.1Variants of the transmitter 19
4.Additionally 22
Conclusion 24
List of references 25
Transceivers also allow various stations to receive and transmit data in a network environment. In fact, they work according to the radio station's algorithm. Modern organizations use these devices to connect to a network of computers, converting a stream of some parallel data sent over the computer bus into a data stream that is already sequential. In this form, they can already be transmitted over the cable that connects computers to the network.
Transceivers are very convenient to connect and then use. It is enough to embed them in the network adapter card or mount them on the cable as a separate unit. For example, a GLS-lh-sm transceiver can transmit a signal over optical lines at a distance of five hundred meters to ten kilometers. Moreover, this model has an extended temperature range (plug) of operation. As you can see, it has a lot of advantages. This means that it is currently an ideal solution for building a network.
There are also optical transceivers that convert the signal to the external transport medium from the network device environment (internal electrical). This new feature makes it possible to build a network with data transmission. The optical model is represented by several modules. These are X2, XENPAK, XFP, SFP. They are optimized to work with various data transfer protocols. Such a transceiver can be either built into a network device or removable.
The rapid development of microelectronics is one of the most striking signs of the beginning of the XXI century. It is difficult to name a sphere of human activity that would not be affected by progress in the development of electronic components and ultra-large integrated circuits. Its results include the processes of mutual penetration and integration of previously clearly delineated areas of application of electronic technology. A striking example of such integration is the combination of computer technology, television, mobile telephony, and the Internet in devices called Smart background and Smart TV, where the smart prefix is translated as "smart".
The development and implementation of ultra-large integrated circuits based on bulk transistors allows the user to programmatically build a complete digital system on a single VLSI chip.
The reduction of topological standards in the manufacture of VLSI from 100 to 14-22 nm at present and to 5-10 nm in the future can be considered as the beginning and formation of a new direction in the development of microelectronics called nanoelectronics.
Based on the achievements of micro-and nanocircuit technology, the hardware of a number of modern computers, complexes and automated control systems has been developed. Together with software, they form the basis of information technologies used in various areas of the national economy, including production and archiving.H] and automated delivery of radio and television programs to consumers.
Дата добавления: 26.03.2021
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2. СВ Crushing and screening plant | АutoCad
velocity pressure in 50 years in this area is 0.80KN/m, and the ground roughness is B. The seismic fortification category of the engineering construction is Class C. The seismic intensity is seven degrees. The design earthquake of the site is in the first group with the venue category of II. The indoor ±0.000 of the project is equivalent to absolute elevation of 403m. Ⅱ. Design of building foundation 1. fk=200kPa is determined tentatively as the characteristic value of foundation bearing capacity. The base should be located on the stable layer, and should exceed local maximum frozen depth.
The single foundation under column is used for the project.
When starting to dig foundation trench, stability of slope should be paid more attention to. When non-natural step-slope excavation starts, the encasing of foundation trench should be specially designed, and the original break ground should not be changed. Unless, the parts disturbed should have the treatment of C15 rubble and concrete pouring in order to get to the designed elevation; the design, construction and supervisor parties should agree if using other method, mechanical digging should follow relevant regulations, 200mm thickness of soil layer should be reserved for hand excavation.
Before foundation construction, drill exploration and trench inspection should be conducted. If the earth quality does not conform to geology report, construction, design, and supervisor parties should have a joint consultation to discuss the treatment method.
100mm thickness, C15 concrete mat layer should be set under concrete foundation slab (except the noted ones), the width around the mat layer of the base is 100mm wider than that of the base.
Both sides of backfill should be at the same time after foundation construction, the backfill located under the base and equipment foundation, ground, wash apron foundation, step foundation must be tamped layer by layer, the thickness of each layer is no more than 300mm, pressure coefficient should be 0.94 or above.
Water cement ratio should be controlled strictly during construction, Strengthen maintenance and take reasonable construction process.
1.General data
2.Table of contents
3.Plan at elevation.0.000-7.200
4.Plan at El.+5.100, section a-a
5.Plan of foundations
6.The Foundation of SJ-1(1)
7.The Foundation of SJ-1(2)
8.The Foundation of the SJ-2(2)
9.The Foundation of the SJ-2(2)
10.Building construction site crushers
11.Design of vibrating screen and conveyor 107
12.Design of a belt conveyor 105
13.Design of a belt conveyor 106
14.Design of a belt conveyor 108
15.Metal structures of service platforms
Дата добавления: 18.08.2017
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