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System and method for routing asynchronous signals

An asynchronous signal and signal technology, applied in the direction of time division multiplexing system, multiplexing communication, electrical components, etc., can solve the problem that the safe clock multiplexer cannot switch the clock signal, etc.

Inactive Publication Date: 2012-05-16
THOMSON LICENSING SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, prior art secure clock multiplexers have some deficiencies
For example, a safe clock multiplexer will often not be able to switch to another clock signal if the currently selected clock signal cannot transition to a known clock state
Prior art secure clock multiplexers cannot tolerate these and other types of clock interruptions

Method used

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  • System and method for routing asynchronous signals
  • System and method for routing asynchronous signals
  • System and method for routing asynchronous signals

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Embodiment Construction

[0019] figure 1 A block diagram of the broadcast router 100 according to a preferred embodiment of the principles of the present invention is described. In a preferred embodiment, the router 100 includes at least one, and preferably a plurality of input modules 402 1 , 402 2 …402 x , Where x is an integer greater than zero, and at least one, and preferably multiple output modules 404 1 …404 y , Where y is an integer. Each input module, such as input module 402 1 , Including at least one, preferably multiple input cards 406 1 , 406 2 …406 z , Where z is an integer greater than zero. Each input card has at least one, preferably multiple input terminals, to receive signals for multiplexing into one output signal. Different input cards typically have different signal receiving capabilities to provide the function of receiving signals from multiple signal sources. Each input module such as input module 402 1 The expansion card 408 inside will enter the card 406 1 -406 z The output...

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Abstract

A router (100), for routing at least one input signal to at least one output, comprises at least one input module (4021-402x) and at least one output module (4041-404y). Each of the input and output modules includes at least one clock selector circuit (5001-500n) for selecting from among a first and second clock signal, and an oscillator signal, as a common output clock signal for the at least first router, based in part on whether at least one of the first and second clock signals has toggled. The clock selector circuit provides redundancy as well as distribution of clock signals among elements within each module.

Description

[0001] Cross reference of related applications [0002] In accordance with Section 119(e) of Title 35 of the United States Code, this application claims the US provisional patent application number 60 / 580,188 filed on June 16, 2004 and the US provisional application number 60 / 580,189 filed on June 16, 2004 The priority of these two applications is incorporated here. Technical field [0003] The present invention relates to routers, and more particularly to a broadcast router that transmits asynchronous signals along a path. Background technique [0004] The router includes a device that causes one or more signals appearing at the input of the router to be transmitted along a path to one or more output. The router used in the broadcasting industry mainly applies at least a first router part, which has a plurality of router modules (also called matrix cards) connected to at least one expansion module. The expansion module connects the chassis of the first router to one or more parts...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04J3/06
CPCH04J3/0688H04J3/06
Inventor 卡尔·克里斯坦森大卫·林恩·比斯威林恩·霍华德·阿布克尔兰德尔·杰奥瓦尼·雷尔东多
Owner THOMSON LICENSING SA