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Automatic pulse with regulating method and device

A technology of wide adjustment and automatic arteries, which is applied in the field of telecommunications, can solve the problems of reducing system performance indicators and affecting the effect of system pulse width adjustment, and achieves the effects of high control precision, high receiving sensitivity and jitter tolerance, and easy implementation

Inactive Publication Date: 2008-11-26
HUAWEI TECH CO LTD
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to provide a pulse width adjustment method and device for automatically recovering a signal with a changed pulse width, so as to solve the problem that the received signal pulse width changes in the prior art, thereby affecting the pulse width adjustment effect of the system and reducing the system's pulse width adjustment effect. The problem with performance indicators

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  • Automatic pulse with regulating method and device
  • Automatic pulse with regulating method and device
  • Automatic pulse with regulating method and device

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Embodiment Construction

[0018] Below according to accompanying drawing and embodiment the present invention will be described in further detail:

[0019] In the present invention, when the optical signal is received, the signal after the input photoelectric conversion is limited and amplified by the limiting amplifier A, and the output signal is fed back to the input terminal as the reference voltage of the operational amplifier A after doing difference and proportional integral operation , the output signal of the limiting amplifier A is post-processed by the operational amplifier B, and the limiting amplifier A and the above-mentioned differential and proportional integral circuit form a negative feedback closed-loop control system.

[0020] Such as figure 2 As shown, the input signal comes from the single-ended output of the receiver, is AC-coupled to the limiting amplifier A, and a fixed bias voltage is added. For AC coupling, this bias voltage must be added. If an appropriate bias voltage is no...

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Abstract

A method for automatically adjusting pulse width and a device relating to the electric communication technology characterizes that an amplifier limits and amplifies signals after photoelectric conversion when receiving optical signals, the reference voltage of the said limiting amplifier is generated and fed back to the input after testing and processing its output signals to be sent to the back stage so as to form a closed loop control system to realize automatic regulation, the input end of its receiving signal is added with a fixed bias voltage, two output signals of the said amplifier are fed back to its input after difference and PI process.

Description

technical field [0001] The invention relates to electric communication technology, in particular to an automatic pulse width adjustment method and device. Background technique [0002] In the optical network environment, the main photoelectric conversion of the receiving part and the pre-amplification of the signal, the limiting amplification of the post-stage and the processing of the post-stage, such as figure 1 As shown, most of the received signals are transmitted through long-distance and multi-stage optical amplification, which has a poor signal-to-noise ratio, and the signal will be distorted due to dispersion and nonlinearity, so the processing of received signals is very critical. Using Limiting amplification can adjust the pulse width of the received signal. Limiting amplification is to perform linear amplification when the amplitude of the input signal is less than a certain value, and to perform nonlinear amplification when the amplitude of the input signal is gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/16H03G11/00H03G5/00
Inventor 王玉金关晓龙李长春
Owner HUAWEI TECH CO LTD