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A Limiting Amplifier for Burst Mode Receivers

A limiting amplifier and burst mode technology, applied in the field of passive optical network, can solve problems such as signal detection errors, and achieve the effect of reducing the probability of errors, simple circuit structure and circuit implementation, and wide application.

Active Publication Date: 2019-12-20
CHENGDU GANIDE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem that the traditional BM-LA detection signal algorithm and circuit architecture are prone to errors in signal detection under the influence of noise and interference, and propose a limiting amplifier and its signal for burst mode receivers. Discrimination method, which can greatly reduce the probability of false detection of valid signals

Method used

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  • A Limiting Amplifier for Burst Mode Receivers
  • A Limiting Amplifier for Burst Mode Receivers
  • A Limiting Amplifier for Burst Mode Receivers

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Embodiment 1

[0034] An embodiment of the present invention provides a limiting amplifier for a burst mode receiver, such as Figure 4 As shown, it includes an amplifier module, a signal amplitude detector module, a signal period discrimination module, a signal detection logic generator module and an output driver module; the input terminal of the amplifier module is the input terminal of the entire limiting amplifier, and its output terminal is respectively connected to the signal amplitude The input end of the detector module and the input end of the output drive module are connected; the signal amplitude detector module, the signal period discrimination module and the signal detection logic generator module are connected in sequence; the output end of the signal detection logic generator module is connected to the output drive module. The JAM pin is connected; the output end of the output driver module is the output end of the entire limiting amplifier.

[0035] Among them, such as Fig...

Embodiment 2

[0061] An embodiment of the present invention provides a method for identifying a limiting amplifier signal for a burst mode receiver, such as Figure 10 shown, including the following steps:

[0062] S1. Use BM-LA to receive burst signals.

[0063] S2. Amplify the received burst signal through the amplifier module, and output the amplified burst signal to the signal amplitude detector module and the output driving module respectively.

[0064] S3. Detect the amplitude of the amplified burst signal through the signal amplitude detector module, and judge whether it is greater than the set threshold voltage, if so, enter step S4, otherwise return to step S1, and receive a new burst signal.

[0065] S4. Detect the period of the amplified burst signal through the signal period identification module, and judge whether it is within the preset time range, if so, enter step S5, otherwise return to step S1, and receive a new burst signal.

[0066] S5. Outputting a valid signal to the...

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Abstract

The invention discloses a limiting amplifier for a burst-mode receiver, and a signal discrimination method thereof. A signal period discrimination circuit is added into the burst-mode receiver BM-LA;noise and effective signals can be effectively discriminated by comparison of the periods of input signals; compared with the traditional method only for detecting the signal amplitude, the error probability of effective signal detection can be greatly reduced; simultaneously, because signal discrimination in the invention is carried out in a preamble period, signal detection only needs the 2TB duration; the time cost is very little; and thus, the limiting amplifier can be widely applied to a high-speed OLT burst-mode receiver.

Description

technical field [0001] The invention belongs to the technical field of passive optical network, and in particular relates to the design of a limiting amplifier for a burst mode receiver and a signal identification method thereof. Background technique [0002] The typical uplink transmission of passive optical network (PON) adopts time division multiple access (TDMA), such as figure 1 As shown, the optical signals sent by multiple optical network terminals (ONT) pass through the optical distribution network (ODN) and then the combined signal enters the optical line terminal (OLT), so it can be seen that the receiver at the OLT end works in burst mode. [0003] The circuit architecture of a typical OLT receiver, such as figure 2 As shown, the photodiode converts the received burst data optical signal into a photocurrent, which is sent to the burst mode transimpedance amplifier (BM-TIA), and its output is sent to the burst mode limiting amplifier (BM-LA). At the input end, B...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B10/69
CPCH04B10/693H04B10/695
Inventor 任军刘浩苏黎郑薇伍莲洪尹浩刘范宏刘盛富李蓝谭荣张磊
Owner CHENGDU GANIDE TECH