A 1394 repeater
A repeater, physical layer circuit technology, applied in the field of information communication, can solve the problems of failing to meet communication requirements, shortening transmission distance, and excessive loss, and achieve the effect of increasing testability and flexibility
Active Publication Date: 2017-06-27
西安翔腾微电子科技有限公司
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Problems solved by technology
Under normal temperature (25°C) agreement requirements that the loss is not greater than 6dB, taking 22# line as an example, the loss is 5.4533dB at 23 meters, and the loss of the signal exceeding 23 meters will exceed the standard, which cannot meet the communication requirements
[0003] Therefore, the existing 1394 bus connection method cannot meet the long-distance 1394 signal transmission
With the continuous development of technology, the transmission rate of 1394 has also been greatly increased. High-speed data transmission will inevitably shorten the transmission distance, and it cannot meet the communication requirements of long-distance transmission.
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[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are all It belongs to the protection scope of the present invention.
[0019] The 1394 repeater includes a bus interface, which includes signal isolation, rate mode selection, connectors, and test interfaces; at least two repeater function units, with the same number of test equipment interfaces as the repeater function units, are used to communicate to the repeater function. The unit provides a power supply circuit for stable power supply. The relay function unit includes a physical layer circuit, a clock circuit, a reset circuit and a signal trans...
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The invention belongs to information communication technology, and relates to a 1394 repeater. The design method of the 1394 repeater includes the design of a 1394 bus interface, a physical layer circuit, a power supply circuit, a reset circuit, a clock circuit, and a housing; the 1394 bus interface includes Signal isolation, speed mode selection, connectors, test interfaces. The physical layer includes device selection and circuit design; the power circuit includes input power filtering, output protection, and isolation. The 1394 repeater provides the bus signal relay function, which realizes the effective transmission of high speed and long distance.
Description
technical field [0001] The invention belongs to information communication technology, and relates to a 1394 repeater. Background technique [0002] At present, the 1394 signal cable adopts four-core coaxial cable and integrates two pairs of differential lines. Under the condition that the loss is not more than 6dB in the normal temperature (25℃) protocol, taking the 22# line as an example, the loss is 5.4533dB at 23 meters, and the signal loss exceeds the standard when the signal exceeds 23 meters, which cannot meet the communication requirements. [0003] Therefore, the existing 1394 bus connection method cannot meet the long-distance 1394 signal transmission. With the continuous development of technology, the transmission rate of 1394 has also been greatly improved. High-speed data transmission will inevitably shorten the transmission distance, and it is even more unable to meet the communication requirements of long-distance transmission. SUMMARY OF THE INVENTION [0...
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IPC IPC(8): H04B3/46H04B3/04
Inventor 田泽杨峰辛永利赵彬邵刚唐超
Owner 西安翔腾微电子科技有限公司