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Method used for eliminating return channels and based on schmitt trigger

A Schmitt trigger, oscilloscope technology, applied in the pulse generation, electrical components, generating electrical pulses and other directions, can solve the problem of E1 signal return channel and other problems, and achieve the effect of eliminating bit errors

Active Publication Date: 2013-05-08
FENGHUO COMM SCI & TECH CO LTD
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  • Claims
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Problems solved by technology

[0008] Aiming at the defects existing in the prior art, the purpose of the present invention is to provide a method based on the Schmitt trigger to eliminate the ditch, to solve the problem that the E1 signal generates a ditch near the threshold level, so as to obtain a one-time judgment result , so that the E1 business can realize error-free transmission

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  • Method used for eliminating return channels and based on schmitt trigger
  • Method used for eliminating return channels and based on schmitt trigger
  • Method used for eliminating return channels and based on schmitt trigger

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0023] The invention is based on the method of Schmitt trigger to eliminate the return ditch, which is realized by the E1 protection terminal board of ASON equipment, and the device with Schmitt trigger can be used as the receiving end of the signal, and the hysteresis voltage is selected by the Schmitt trigger , the Schmitt trigger can be built with a circuit, or a CPLD (Complex Programmable Logic Device) chip integrated with a Schmitt trigger can be selected. For a standard Schmitt trigger, the high and low level judgment is not a threshold voltage, but a positive threshold voltage (VTH) and a negative threshold voltage (VTL). When the input signal is rising from low level, the output changes to high level only when the input voltage is greater than VTH; when the input signal is falling from high level, only when the input voltage is less th...

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Abstract

The invention provides a method used for eliminating return channels and based on a schmitt trigger, and relates to signal waveform return channel elimination in automatically switched optical network (ASON) equipment. The method includes that S1, input signals are measured through an oscillometer, the position and the amplitude of a signal return channel are determined; and S2, a hysteresis voltage is chosen, and the fact that the amplitude of the return channel does not cross two sides of the hysteresis voltage at the same time is guaranteed. The method resolves the problem that return channels are produced close to a threshold level of an E1 signal, therefore judgment results are obtained at a time, and E1 business achieves non-error-code transmission.

Description

technical field [0001] The invention relates to the elimination of signal waveform backgroove in ASON (Automatically Switched Optical Network, Automatically Switched Optical Network) equipment, specifically a method for eliminating backgroove based on a Schmidt trigger. Background technique [0002] In the existing communication network, there are still a large number of mobile base stations using the E1 interface; in addition, due to the particularity of the power network and other private networks, point-to-point transmission communication is mostly used, and a large number of E1 interfaces are used, so ASON equipment requires multiple E1 services interface. [0003] In the application scenarios of dedicated networks such as power grids, E1 signals need to implement point-to-multipoint, that is, one transmitter drives multiple receivers. According to the signal integrity (Signal integrity) theory, it is necessary to use a daisy chain (Daisy chain) topology. , and parallel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K3/3565
Inventor 段毅华颖
Owner FENGHUO COMM SCI & TECH CO LTD
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