CN201499153U - Slow start circuit and optical module comprising same - Google Patents
Slow start circuit and optical module comprising same Download PDFInfo
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- CN201499153U CN201499153U CN2009203090076U CN200920309007U CN201499153U CN 201499153 U CN201499153 U CN 201499153U CN 2009203090076 U CN2009203090076 U CN 2009203090076U CN 200920309007 U CN200920309007 U CN 200920309007U CN 201499153 U CN201499153 U CN 201499153U
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Abstract
The utility model discloses a slow start circuit and an optical module comprising same, wherein the slow start circuit consists of a power input terminal and a load output terminal, and further comprises a controllable switch circuit and a switch control circuit, a switching channel of the controllable switch circuit is connected in series between the power input terminal and the load output terminal for controlling the output of the controllable switch circuit. The slow circuit has simple structure and easy realization, is applied in the optical module to eliminate surge current generated in the process of hot plug, and realizes the slow start of the optical module.
Description
Technical field
The utility model relates to the optical communication technique field, particularly a kind of soft-start circuit that is applied to optical module.
Background technology
At present, at optical communication field, in order to be beneficial to installation, maintenance and upgrade of network apparatus, to be tending towards miniaturization gradually, can to plug as the optical module of optical communication system core component.In optical module hot plug moment, can produce surge current, it is bigger several times and even tens times than system running current.Surge current meeting severe contamination supply network influences the normal operation of equipment; Also can damage components and parts such as power supply magnetic bead, fuse, electromagnetic interface filter, rectifier bridge, filter capacitor even printed circuit board (PCB).Though the dominance of can't see surge current sometimes and being caused is damaged, the recessiveness that it caused is damaged the reliability that has reduced equipment, and this is der Hammer feelings more.The input characteristics of power supply improves its reliability when improving the optical module hot plug, reduces the pollution to power supply, must be limited surge current.The method of conventional limited surge current exists that power consumption is big, the secondary surge and because of circuit is complicated can't be in the inner shortcoming that realizes of optical module.
Summary of the invention
The purpose of this utility model is to provide a kind of circuit structure soft-start circuit simple, that realize easily, so that be applied in the surge current that produces when eliminating the optical module hot plug in the optical module, realizes the slow startup of optical module.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of soft-start circuit, have power input terminal and load lead-out terminal, it is characterized in that, also comprise gate-controlled switch circuit and ON-OFF control circuit, the switch ways of described gate-controlled switch circuit is connected between described power input terminal and the described load lead-out terminal; Described ON-OFF control circuit is connected between the control terminal of described power input terminal and described gate-controlled switch circuit, in order to control the output of described gate-controlled switch circuit.
According to soft-start circuit described in the utility model, described gate-controlled switch circuit comprises a P channel MOS tube, and described ON-OFF control circuit comprises a charging capacitor and a current-limiting resistance; The charging terminal of described charging capacitor connects the source electrode of described P channel MOS tube on the one hand, connects described power input terminal on the other hand; Another terminal of described charging capacitor connects the grid of described P channel MOS tube on the one hand, on the other hand by described current-limiting resistance ground connection; The drain electrode of described P channel MOS tube connects described load lead-out terminal.
The utility model also provides a kind of optical module, comprise soft-start circuit, described soft-start circuit has power input terminal and load lead-out terminal, it is characterized in that, described soft-start circuit also comprises gate-controlled switch circuit and ON-OFF control circuit, and the switch ways of described gate-controlled switch circuit is connected between described power input terminal and the described load lead-out terminal; Described ON-OFF control circuit is connected between the control terminal of described power input terminal and described gate-controlled switch circuit, in order to control the output of described gate-controlled switch circuit.
According to optical module described in the utility model, described gate-controlled switch circuit comprises a P channel MOS tube, and described ON-OFF control circuit comprises a charging capacitor and a current-limiting resistance; The charging terminal of described charging capacitor connects the source electrode of described P channel MOS tube on the one hand, connects described power input terminal on the other hand; Another terminal of described charging capacitor connects the grid of described P channel MOS tube on the one hand, on the other hand by described current-limiting resistance ground connection; The drain electrode of described P channel MOS tube connects described load lead-out terminal.
According to optical module described in the utility model, described power input terminal connects the golden finger power pin of described optical module.
Compared with prior art, advantage of the present utility model and good effect are: gate-controlled switch circuit and ON-OFF control circuit are set in soft-start circuit, output by ON-OFF control circuit control gate-controlled switch circuit, make that the starting current of soft-start circuit is less, no matter be that heavy load or capacitive load all only produce very little starting current, thereby improved the useful life of components and parts, guaranteed the stability of product quality better.Described soft-start circuit is simple, realize easily, cost is low, portability is strong, is specially adapted to the optical module of miniaturization, hot plug.
Description of drawings
Fig. 1 is the circuit theory diagrams of an embodiment of the utility model soft-start circuit.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
See also the circuit theory diagrams of the embodiment of the utility model soft-start circuit shown in Fig. 1.
Described soft-start circuit includes the P channel MOS tube M that constitutes the gate-controlled switch circuit, and the charging capacitor C1 and the current-limiting resistance R1 that constitute ON-OFF control circuit.
The charging terminal of described charging capacitor C1 connects the source electrode of described P channel MOS tube M on the one hand, connects power supply by power input terminal a on the other hand.Another terminal of described charging capacitor C1 connects the grid of described P channel MOS tube M on the one hand, on the other hand by current-limiting resistance R1 ground connection.
The drain electrode of described P channel MOS tube M connects load lead-out terminal b by inductance L 1, and then connects load by described load lead-out terminal b.
The operation principle of foregoing circuit is: at powered on moment, because the charging process of charging capacitor C1 causes the grid of P channel MOS tube M and the voltage V between the source electrode
GSChange, thereby make P channel MOS tube M slowly open its conducting channel, cause its drain current ID to increase gradually, avoid occurring surge current, realize the slow startup of circuit.Adjust the appearance value of charging capacitor C1 and/or the resistance of current-limiting resistance R1, can change the charging interval, thereby start-up time is delayed in control.
When the soft-start circuit of described embodiment is applied in the hot plug optical module, described soft-start circuit can be arranged on optical module inside, described power input terminal a connects the golden finger power pin of optical module, introduces external power source; Load lead-out terminal b then directly connects the power input of inner each components and parts of optical module and circuit module, for the optical module operate as normal provides power supply.
According to technical scheme provided by the utility model and embodiment, those skilled in the art can know, described gate-controlled switch circuit also can the N-channel MOS pipe or components and parts such as transistor except that the P channel MOS tube that can adopt embodiment one; And ON-OFF control circuit charging capacitor and the current-limiting resistance, also can adopt other circuit structures in adopting embodiment one, as long as can realize the gate-controlled switch circuit is exported the slow startup of controlling, realize circuit.
Certainly; the above only is a kind of preferred implementation of the present utility model; should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (5)
1. soft-start circuit, have power input terminal and load lead-out terminal, it is characterized in that, also comprise gate-controlled switch circuit and ON-OFF control circuit, the switch ways of described gate-controlled switch circuit is connected between described power input terminal and the described load lead-out terminal; Described ON-OFF control circuit is connected between the control terminal of described power input terminal and described gate-controlled switch circuit, in order to control the output of described gate-controlled switch circuit.
2. soft-start circuit according to claim 1 is characterized in that, described gate-controlled switch circuit comprises a P channel MOS tube, and described ON-OFF control circuit comprises a charging capacitor and a current-limiting resistance; The charging terminal of described charging capacitor connects the source electrode of described P channel MOS tube on the one hand, connects described power input terminal on the other hand; Another terminal of described charging capacitor connects the grid of described P channel MOS tube on the one hand, on the other hand by described current-limiting resistance ground connection; The drain electrode of described P channel MOS tube connects described load lead-out terminal.
3. optical module, comprise soft-start circuit, described soft-start circuit has power input terminal and load lead-out terminal, it is characterized in that, described soft-start circuit also comprises gate-controlled switch circuit and ON-OFF control circuit, and the switch ways of described gate-controlled switch circuit is connected between described power input terminal and the described load lead-out terminal; Described ON-OFF control circuit is connected between the control terminal of described power input terminal and described gate-controlled switch circuit, in order to control the output of described gate-controlled switch circuit.
4. optical module according to claim 3 is characterized in that, described gate-controlled switch circuit comprises a P channel MOS tube, and described ON-OFF control circuit comprises a charging capacitor and a current-limiting resistance; The charging terminal of described charging capacitor connects the source electrode of described P channel MOS tube on the one hand, connects described power input terminal on the other hand; Another terminal of described charging capacitor connects the grid of described P channel MOS tube on the one hand, on the other hand by described current-limiting resistance ground connection; The drain electrode of described P channel MOS tube connects described load lead-out terminal.
5. according to claim 3 or 4 described optical modules, it is characterized in that described power input terminal connects the golden finger power pin of described optical module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203090076U CN201499153U (en) | 2009-08-27 | 2009-08-27 | Slow start circuit and optical module comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203090076U CN201499153U (en) | 2009-08-27 | 2009-08-27 | Slow start circuit and optical module comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201499153U true CN201499153U (en) | 2010-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009203090076U Expired - Lifetime CN201499153U (en) | 2009-08-27 | 2009-08-27 | Slow start circuit and optical module comprising same |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101888272A (en) * | 2010-06-17 | 2010-11-17 | 青岛海信宽带多媒体技术有限公司 | Passive optical module |
| CN102305963A (en) * | 2011-07-29 | 2012-01-04 | 索尔思光电（成都）有限公司 | SFP (Small Form-Factor Pluggable Transceiver) optical module electrifying circuit |
| CN104348082A (en) * | 2013-08-08 | 2015-02-11 | 深圳新飞通光电子技术有限公司 | TEC (Thermo Electric Cooler) starting circuit of electro-absorption modulated laser |
| CN104393862A (en) * | 2014-12-08 | 2015-03-04 | 深圳市航盛电子股份有限公司 | Miller capacitance characteristic based car power supply starting circuit |
| CN104702257A (en) * | 2015-03-11 | 2015-06-10 | 上海新微技术研发中心有限公司 | Power-on protection circuit and electronic equipment |
| CN106129980A (en) * | 2016-06-30 | 2016-11-16 | 山东超越数控电子有限公司 | A kind of hot-swappable circuit with Power Limitation function |
| CN107391414A (en) * | 2017-07-24 | 2017-11-24 | 青岛海信宽带多媒体技术有限公司 | A kind of signal input circuit and hot-pluggable optical module |
| CN108055028A (en) * | 2018-02-02 | 2018-05-18 | 深圳市欧深特信息技术有限公司 | A kind of delay startup controllable power switch of multi-functional unification |
| CN111092546A (en) * | 2019-12-26 | 2020-05-01 | 杭州电子科技大学 | Surge suppression slow starting circuit for supporting hot plugging |
| CN112350288A (en) * | 2019-08-09 | 2021-02-09 | 亚德诺半导体国际无限责任公司 | Communication terminal for hot-plug controller |
| CN113328419A (en) * | 2021-07-29 | 2021-08-31 | 深圳市迅特通信技术股份有限公司 | Surge current control circuit of pluggable module and pluggable module |
| CN115826163A (en) * | 2023-02-16 | 2023-03-21 | 绍兴中科通信设备有限公司 | Circuit structure for preventing light leakage of SFP-DD optical module and optical module |
-
2009
- 2009-08-27 CN CN2009203090076U patent/CN201499153U/en not_active Expired - Lifetime
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101888272A (en) * | 2010-06-17 | 2010-11-17 | 青岛海信宽带多媒体技术有限公司 | Passive optical module |
| CN101888272B (en) * | 2010-06-17 | 2013-03-27 | 青岛海信宽带多媒体技术有限公司 | Passive optical module |
| CN102305963A (en) * | 2011-07-29 | 2012-01-04 | 索尔思光电（成都）有限公司 | SFP (Small Form-Factor Pluggable Transceiver) optical module electrifying circuit |
| CN102305963B (en) * | 2011-07-29 | 2014-04-09 | 索尔思光电（成都）有限公司 | SFP (Small Form-Factor Pluggable Transceiver) optical module electrifying circuit |
| CN104348082A (en) * | 2013-08-08 | 2015-02-11 | 深圳新飞通光电子技术有限公司 | TEC (Thermo Electric Cooler) starting circuit of electro-absorption modulated laser |
| CN104393862A (en) * | 2014-12-08 | 2015-03-04 | 深圳市航盛电子股份有限公司 | Miller capacitance characteristic based car power supply starting circuit |
| CN104702257B (en) * | 2015-03-11 | 2017-08-04 | 上海新微技术研发中心有限公司 | Power-on protection circuit and electronic equipment |
| CN104702257A (en) * | 2015-03-11 | 2015-06-10 | 上海新微技术研发中心有限公司 | Power-on protection circuit and electronic equipment |
| CN106129980A (en) * | 2016-06-30 | 2016-11-16 | 山东超越数控电子有限公司 | A kind of hot-swappable circuit with Power Limitation function |
| CN107391414A (en) * | 2017-07-24 | 2017-11-24 | 青岛海信宽带多媒体技术有限公司 | A kind of signal input circuit and hot-pluggable optical module |
| CN107391414B (en) * | 2017-07-24 | 2019-09-20 | 青岛海信宽带多媒体技术有限公司 | A kind of signal input circuit and hot-pluggable optical module |
| CN108055028A (en) * | 2018-02-02 | 2018-05-18 | 深圳市欧深特信息技术有限公司 | A kind of delay startup controllable power switch of multi-functional unification |
| CN112350288A (en) * | 2019-08-09 | 2021-02-09 | 亚德诺半导体国际无限责任公司 | Communication terminal for hot-plug controller |
| US11474581B2 (en) | 2019-08-09 | 2022-10-18 | Analog Devices International Unlimited Company | Communication terminal for hot-swap controllers |
| CN112350288B (en) * | 2019-08-09 | 2024-03-12 | 亚德诺半导体国际无限责任公司 | Communication terminal for hot plug controller |
| CN111092546A (en) * | 2019-12-26 | 2020-05-01 | 杭州电子科技大学 | Surge suppression slow starting circuit for supporting hot plugging |
| CN113328419A (en) * | 2021-07-29 | 2021-08-31 | 深圳市迅特通信技术股份有限公司 | Surge current control circuit of pluggable module and pluggable module |
| CN115826163A (en) * | 2023-02-16 | 2023-03-21 | 绍兴中科通信设备有限公司 | Circuit structure for preventing light leakage of SFP-DD optical module and optical module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100602 |