Temperature self-adaptive current source and optical module

An adaptive and current source technology, applied in the field of optical communication, can solve the problems of increased power consumption of optical modules, decreased communication quality, and shortened lifespan, achieving the effects of reducing power consumption, saving manpower and time, and optimizing high-temperature performance

Pending Publication Date: 2018-08-31
BOWEI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] What the present invention aims to solve is the problem that high temperature leads to increased power consumption of optical modules, shortened lifespan, and decreased or even interrupted communication quality

Method used

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  • Temperature self-adaptive current source and optical module
  • Temperature self-adaptive current source and optical module
  • Temperature self-adaptive current source and optical module

Examples

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Effect test

Embodiment 1

[0045] This embodiment provides a temperature adaptive current source, figure 1 is the circuit diagram of the temperature adaptive current source, the temperature adaptive current source includes a proportional current source, a thermistor R NTC , a power supply terminal, an input terminal IPD and an output terminal IMPD.

[0046] Specifically, the proportional current source includes a reference current branch and an output current branch, and the thermistor R NTC connected in series in the reference current branch or in series in the output current branch; one end of the reference current branch is connected to the input terminal IPD and is adapted to receive the feedback current I from the optical component PD , one end of the output current branch is connected to the output terminal IMPD and is suitable for outputting the sampling current I to the driver chip of the optical component MPD , the sampling current I MPD It is positively correlated with temperature, that is,...

Embodiment 2

[0054] This embodiment provides a temperature adaptive current source, image 3 is the circuit diagram of the temperature adaptive current source. Compared with the temperature adaptive current source provided in Embodiment 1, the difference is that the thermistor R PTC in series with the reference current branch, and the thermistor R PTC A thermistor with a positive temperature coefficient.

[0055] In this embodiment, the thermistor R PTC connected in series between the power supply terminal and one end of the second resistor R2, that is, one end of the second resistor R2 passes through the thermistor R PTC Connect the power supply terminal. Of course, the thermistor R PTC It can also be connected in series between the other end of the second resistor R2 and the emitter of the second PNP transistor Q2, that is, the other end of the second resistor R2 passes through the thermistor R PTC connected to the emitter of the second PNP transistor Q2, as Figure 4 shown.

[0...

Embodiment 3

[0060] This embodiment provides a temperature adaptive current source, Figure 5 is the circuit diagram of the temperature adaptive current source. Compared with the temperature adaptive current source provided in Embodiment 1, the difference is that: the power supply terminal is grounded, the output current branch includes a first resistor R1 and a first NPN transistor Q1, and the reference current branch includes a second Resistor R2 and the second NPN transistor Q2.

[0061] Specifically, one end of the first resistor R1 is used as the other end of the output current branch, that is, one end of the first resistor R1 is connected to the power supply end, and the other end of the first resistor R1 is connected to the first An emitter of an NPN transistor Q1, the base of the first NPN transistor Q1 is connected to the base of the second NPN transistor Q2 and the collector of the second NPN transistor Q2, and the collector of the first NPN transistor Q1 The electrode is used ...

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Abstract

The invention discloses a temperature self-adaptive current source and an optical module. The temperature self-adaptive current source comprises a proportional current source, a thermistor, a power supply end, an input end and an output end, wherein the proportional current source comprises a reference current branch and a output current branch; the thermistor is connected in the reference currentbranch or the output current branch in series; one end of the reference current branch is connected with the input end and suitable for receiving feedback current from the optical module, one end ofthe output current branch is connected with the output end and suitable for outputting sampling current to a drive chip of the optical module, the sampling current and temperature are in positive correlation, and the other end of the reference current branch and the other end of the output current branch are connected with the power supply end. By means of the temperature self-adaptive current source and the optical module, the problems of power consumption increase, shortened service life and communication outage of the optical module due to high temperatures can be solved.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a temperature adaptive current source and an optical module. Background technique [0002] Currently widely used optical modules, the bias current output by the driver chip basically adopts the closed-loop driving mode of automatic optical power control (APC, Automatic Power Control) for the laser diode (LD, LaserDiode), that is, the driver chip is configured at room temperature, so that The laser diode emits optical power at a certain value. A general optical assembly, such as a bi-directional optical sub-assembly (BOSA, Bi-directional Optical Sub-Assembly), is provided not only with a laser diode, but also with a backlight diode (MPD, Monitor Photodiode). The backlight diode is used to monitor the emitted light power of the laser diode, and converts the emitted light signal into a current signal for the driver chip to inform the driver chip of the actual emitted ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/567
CPCG05F1/567
Inventor 蔡舒宏李汝虎
Owner BOWEI TECH
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