SFP (Small Form-Factor Pluggable Transceiver) optical module electrifying circuit

A technology of optical modules and circuits, which is applied in optical fiber transmission, electromagnetic transceivers, optical waveguide coupling, etc., and can solve problems such as system power supply circuit damage
CN102305963BActive Publication Date: 2014-04-09SOURCE PHOTONICS CHENGDU
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
SOURCE PHOTONICS CHENGDU
Publication Date
2014-04-09

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Abstract

The invention discloses an SFP (Small Form-Factor Pluggable Transceiver) optical module electrifying circuit comprising an MOS (Metal Oxide Semiconductor) switch group, wherein the MOS switch group comprises two MOS switches; the S end of each MOS switch is connected with VCCIN; the G end of each MOS switch is earthed by a resistor; a capacitor is connected in series between the G end and the S end; and the D end of each switch is connected with output VCCOUT. According to the electrifying circuit disclosed by the invention, the damage of surge current in the electrifying process of the SFP optical module on a system can be effectively lowered, and parameters are regulated as required so that the electrifying times of the power supply of the optical module transmitting and receiving end circuit are respectively controlled.
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Description

technical field

[0001] The invention relates to an SFP optical module in the field of optical communication, in particular to a power-on circuit suitable for the SFP optical module. Background technique

[0002] With the development of optical communication technology, optical modules have been widely used in communication systems, and hot-swappable (SFP) optical modules have always been dominant due to the convenience of replacing them without powering down the system board during system use. status. However, during the power-on process of the SFP optical module, the generated surge current has great damage to the system power supply system, and even causes damage to the system power supply system.

[0003] The surge current of the SPF optical module is mainly generated by two parts of the current of the optical module, one of which is the transient change of the power supply voltage during power-on. The impedance characteristics of capacitors for different frequencies ar...

Claims

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