CN114006348A - Single-row carrier photoelectric detector bias voltage protection circuit - Google Patents
Single-row carrier photoelectric detector bias voltage protection circuit Download PDFInfo
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- CN114006348A CN114006348A CN202111472545.9A CN202111472545A CN114006348A CN 114006348 A CN114006348 A CN 114006348A CN 202111472545 A CN202111472545 A CN 202111472545A CN 114006348 A CN114006348 A CN 114006348A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
- H02H3/207—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage also responsive to under-voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
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Abstract
The invention discloses a single-row carrier photoelectric detector bias protection circuit, which comprises a direct current power supply unit, a voltage stabilizing unit and a voltage output adjusting unit, wherein the direct current power supply unit is connected with the voltage stabilizing unit; the input end of the voltage stabilizing unit is connected with the direct current supply unit, the output end of the voltage stabilizing unit is connected with the input end of the voltage output adjusting unit, and the output end of the voltage output adjusting unit is connected with the single-row carrier photoelectric detector. The single-row carrier photoelectric detector bias voltage protection circuit provided by the invention can output stable, low-noise and low-ripple bias voltage while monitoring the working photocurrent of the single-row carrier photoelectric detector in real time, and realize fine adjustment of the bias voltage from 0 to a typical value, has simple realization mode and low cost, protects the single-row carrier photoelectric detector bias voltage, avoids damage to a tube core caused by voltage overshoot, and prolongs the service life.
Description
Technical Field
The invention relates to the technical field of photoelectric communication of an optical module circuit, in particular to a single-row carrier photoelectric detector bias voltage protection circuit.
Background
Due to the structural particularity of the single-row Carrier photodetector (UTC-PD), only electrons are used as active carriers, so that the single-row Carrier photodetector has the characteristics of high speed, high responsivity, high saturation output and the like, is widely applied to ultra-high speed optical receivers, optical switches, transmitters, high speed measurement systems, millimeter wave or submillimeter wave generators and the like, and becomes a key device in the current photoelectronic field.
However, proper and high quality reverse bias voltage is important to ensure proper operation of the UTC-PD. The magnitude of the bias voltage directly determines the output power and the working bandwidth of the UTC-PD, and the stable and low-noise working voltage enables the UTC-PD to still have good performance output under a long-time working state. Also, real-time monitoring of the output photocurrent of the UTC-PD is necessary, and excessive current can cause performance degradation and even burn out of the probe die. The preparation process of UTC-PD is very demanding and expensive, and effective safe bias protection and real-time monitoring of UTC-PD is therefore essential. At present, the common method for applying the bias voltage by the UTC-PD is mainly that a simple direct-current power supply directly supplies power, the bias voltage obtained by the method is not stable enough, and the ripple noise is large.
Disclosure of Invention
The invention aims to provide a single-row carrier photoelectric detector bias voltage protection circuit, which realizes the beneficial effects of outputting stable, low-noise and low-ripple bias voltage while monitoring the working photocurrent of the single-row carrier photoelectric detector in real time, realizing the fine adjustment of the change of the bias voltage from 0 to a typical bias voltage value, protecting the single-row carrier photoelectric detector bias voltage, avoiding damage to a tube core caused by voltage overshoot and prolonging the service life.
The technical scheme adopted by the invention is as follows:
a single-row carrier photoelectric detector bias protection circuit comprises a direct current power supply unit, a voltage stabilizing unit and a voltage output adjusting unit; the input end of the voltage stabilizing unit is connected with the direct current supply unit, the output end of the voltage stabilizing unit is connected with the input end of the voltage output adjusting unit, and the output end of the voltage output adjusting unit is connected with the single-row carrier photoelectric detector.
Further, the direct current supply unit transmits the working voltage to the voltage stabilizing unit, and simultaneously monitors the working photocurrent of the single-row carrier photoelectric detector.
Further, the voltage stabilizing unit comprises a low dropout linear voltage stabilizing circuit, a regulating resistor R1 and a regulating resistor R2; a first port of the low dropout linear voltage regulator circuit is used as an input end of the voltage stabilizing unit and is connected with the direct current power supply unit, a second port of the low dropout linear voltage regulator circuit is used as an output end of the voltage stabilizing unit and is connected with an input end of the voltage output regulating unit, meanwhile, a second port of the low dropout linear voltage regulator circuit is used as a middle end of the voltage stabilizing unit and is connected with an input end of the regulating resistor R1, an output end of the regulating resistor R1 is connected with an input end of the regulating resistor R2, an output end of the regulating resistor R1 is connected with a third port of the low dropout linear voltage regulator circuit, and an output end of the regulating resistor R2 is grounded; when the low dropout linear voltage regulator circuit works, the low dropout linear voltage regulator circuit outputs a bias voltage value V1, the bias voltage value V1 is divided by the regulating resistor R1 and the regulating resistor R2 to obtain a feedback voltage V2, the feedback voltage V2 is sent into the low dropout linear voltage regulator circuit through a third port of the low dropout linear voltage regulator circuit, the low dropout linear voltage regulator circuit internally comprises a reference circuit, a comparison and judgment circuit and a voltage regulation circuit, the comparison and judgment circuit judges the voltage of the feedback voltage V2 and the reference circuit, and if the feedback voltage V2 is greater than or less than the voltage of the reference circuit, the comparison and judgment circuit controls the voltage regulation circuit to regulate the bias voltage value V1 to obtain a typical bias voltage value.
Further, the voltage output regulating unit is a potentiometer R3, a first port of the potentiometer R3 is used as an input end of the voltage output regulating unit and is connected with an output end of the voltage stabilizing unit, a second port of the potentiometer R3 is used as an output end of the voltage output regulating unit and is connected with the single-row carrier photodetector, and a third port of the potentiometer R3 is grounded; in operation, the output terminal bias voltage value is varied between 0 and a typical bias voltage value by adjusting the resistance value of the second port of the potentiometer R3.
The invention has the beneficial effects that: the single-row carrier photoelectric detector bias voltage protection circuit provided by the invention can output stable, low-noise and low-ripple bias voltage while monitoring the working photocurrent of the single-row carrier photoelectric detector in real time, and can realize fine adjustment of the change of the bias voltage from 0 to a typical bias voltage value.
Drawings
FIG. 1 is a schematic diagram of a single-row carrier photodetector bias protection circuit according to the present invention;
FIG. 2 is a circuit of an embodiment of the circuit of the present invention.
Detailed Description
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, a single-row carrier photodetector bias protection circuit includes a dc power supply unit, a voltage stabilization unit and a voltage output adjustment unit; the input end of the voltage stabilizing unit is connected with the direct current supply unit, the output end of the voltage stabilizing unit is connected with the input end of the voltage output adjusting unit, and the output end of the voltage output adjusting unit is connected with the single-row carrier photoelectric detector.
And the direct current power supply unit transmits the working voltage to the voltage stabilizing unit and simultaneously monitors the working photocurrent of the single-row carrier photoelectric detector.
The voltage stabilizing unit comprises a low-dropout linear voltage stabilizing circuit, a regulating resistor R1 and a regulating resistor R2; a first port of the low dropout linear voltage regulator circuit is used as an input end of the voltage stabilizing unit and is connected with the direct current power supply unit, a second port of the low dropout linear voltage regulator circuit is used as an output end of the voltage stabilizing unit and is connected with an input end of the voltage output regulating unit, meanwhile, a second port of the low dropout linear voltage regulator circuit is used as a middle end of the voltage stabilizing unit and is connected with an input end of the regulating resistor R1, an output end of the regulating resistor R1 is connected with an input end of the regulating resistor R2, an output end of the regulating resistor R1 is connected with a third port of the low dropout linear voltage regulator circuit, and an output end of the regulating resistor R2 is grounded; when the low dropout linear voltage regulator circuit works, the low dropout linear voltage regulator circuit outputs a bias voltage value V1, the bias voltage value V1 is divided by the regulating resistor R1 and the regulating resistor R2 to obtain a feedback voltage V2, the feedback voltage V2 is sent into the low dropout linear voltage regulator circuit through a third port of the low dropout linear voltage regulator circuit, the low dropout linear voltage regulator circuit internally comprises a reference circuit, a comparison and judgment circuit and a voltage regulation circuit, the comparison and judgment circuit judges the voltage of the feedback voltage V2 and the reference circuit, and if the feedback voltage V2 is greater than or less than the voltage of the reference circuit, the comparison and judgment circuit controls the voltage regulation circuit to regulate the bias voltage value V1 to obtain a typical bias voltage value.
The voltage output regulating unit is a potentiometer R3, a first port of the potentiometer R3 is used as an input end of the voltage output regulating unit and is connected with an output end of the voltage stabilizing unit, a second port of the potentiometer R3 is used as an output end of the voltage output regulating unit and is connected with the single-row carrier photodetector, and a third port of the potentiometer R3 is grounded; in operation, the output terminal bias voltage value is varied between 0 and a typical bias voltage value by adjusting the resistance value of the second port of the potentiometer R3.
Examples
Referring to fig. 2, Vdd is connected to a precision dc source meter as a dc power supply unit of the circuit of this embodiment, and the precision dc source meter monitors the photocurrent of the single-row carrier photodetector during normal operation in real time; the bias voltage value Vpd output by the low dropout linear regulator IC1 is divided by the regulating resistor R4 and the regulating resistor R5 to obtain the external feedback voltage V3, the external feedback voltage V3 is input to the voltage feedback interface ADJ of the low dropout linear regulator IC1, the comparison and judgment circuit in the low dropout linear regulator IC1 compares and judges the voltage of the external feedback voltage V3 and the voltage of the internal reference circuit of the low dropout linear regulator IC1, if the external feedback voltage V3 is greater than or less than the voltage of the reference circuit inside the low dropout linear voltage regulator IC1, the comparison and judgment circuit controls a voltage regulation circuit in the low dropout linear voltage regulator circuit IC1 to finely regulate the output bias voltage value Vpd, and the regulated low dropout linear voltage regulator circuit IC1 fed back by the closed loop outputs a stable typical bias voltage value Vpd required by the normal operation of the single-row carrier photodetector; the typical bias voltage value Vpd enters a voltage output adjusting unit after being filtered by capacitors C2, C3 and C4, the voltage output adjusting unit in the embodiment adopts a high-precision and high-resolution trimming potentiometer R6 with the model of 3269W-1-503GLF, the fine adjustment of the bias voltage value of a Vo end from 0 to the typical bias voltage value is realized by adjusting the tap position of the potentiometer R6, the Vo end is connected to a single-row carrier photoelectric detector, and the bias voltage working state of the photoelectric detector can be conveniently and accurately set and monitored.
The invention adopts low-cost separation components to realize the bias voltage protection of the single-row carrier photoelectric detector, outputs stable, low-noise and low-ripple bias voltage while monitoring the working photocurrent of the single-row carrier photoelectric detector in real time, realizes the fine adjustment of the change of the bias voltage from 0 to a typical bias voltage value, has simple realization mode and low cost, protects the bias voltage of the single-row carrier photoelectric detector, avoids the damage to a die caused by voltage overshoot, and prolongs the service life.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A single-row carrier photoelectric detector bias protection circuit is characterized by comprising a direct current power supply unit, a voltage stabilizing unit and a voltage output adjusting unit; the input end of the voltage stabilizing unit is connected with the direct current supply unit, the output end of the voltage stabilizing unit is connected with the input end of the voltage output adjusting unit, and the output end of the voltage output adjusting unit is connected with the single-row carrier photoelectric detector.
2. The bias protection circuit of claim 1, wherein the dc supply unit supplies an operating voltage to the voltage regulator unit while monitoring an operating photocurrent of the single-row carrier photodetector.
3. The single-row carrier photodetector bias protection circuit of claim 1, wherein said voltage regulation unit comprises a low dropout linear voltage regulation circuit, a regulation resistor R1 and a regulation resistor R2; a first port of the low dropout linear voltage regulator circuit is used as an input end of the voltage stabilizing unit and is connected with the direct current power supply unit, a second port of the low dropout linear voltage regulator circuit is used as an output end of the voltage stabilizing unit and is connected with an input end of the voltage output regulating unit, meanwhile, a second port of the low dropout linear voltage regulator circuit is used as a middle end of the voltage stabilizing unit and is connected with an input end of the regulating resistor R1, an output end of the regulating resistor R1 is connected with an input end of the regulating resistor R2, an output end of the regulating resistor R1 is connected with a third port of the low dropout linear voltage regulator circuit, and an output end of the regulating resistor R2 is grounded; when the low dropout linear voltage regulator circuit works, the low dropout linear voltage regulator circuit outputs a bias voltage value V1, the bias voltage value V1 is divided by the regulating resistor R1 and the regulating resistor R2 to obtain a feedback voltage V2, the feedback voltage V2 is sent into the low dropout linear voltage regulator circuit through a third port of the low dropout linear voltage regulator circuit, the low dropout linear voltage regulator circuit internally comprises a reference circuit, a comparison and judgment circuit and a voltage regulation circuit, the comparison and judgment circuit judges the voltage of the feedback voltage V2 and the reference circuit, and if the feedback voltage V2 is greater than or less than the voltage of the reference circuit, the comparison and judgment circuit controls the voltage regulation circuit to regulate the bias voltage value V1 to obtain a typical bias voltage value.
4. The single-row carrier photodetector bias protection circuit of claim 3, wherein said voltage output regulation unit is a potentiometer R3, a first port of said potentiometer R3 is connected as an input of said voltage output regulation unit to an output of said voltage regulation unit, a second port of said potentiometer R3 is connected as an output of said voltage output regulation unit to a single-row carrier photodetector, and a third port of said potentiometer R3 is connected to ground; in operation, the output terminal bias voltage value is varied between 0 and a typical bias voltage value by adjusting the resistance value of the second port of the potentiometer R3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111472545.9A CN114006348A (en) | 2021-12-06 | 2021-12-06 | Single-row carrier photoelectric detector bias voltage protection circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111472545.9A CN114006348A (en) | 2021-12-06 | 2021-12-06 | Single-row carrier photoelectric detector bias voltage protection circuit |
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| CN213600900U (en) * | 2020-10-20 | 2021-07-02 | 山西大学 | Novel bias voltage photoelectric detector with flexible output mode |
| CN214591154U (en) * | 2021-03-30 | 2021-11-02 | 杭州柔谷科技有限公司 | Bias voltage circuit, photoelectric detection module and oxygen partial pressure sensor |
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2021
- 2021-12-06 CN CN202111472545.9A patent/CN114006348A/en active Pending
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| CN104345018A (en) * | 2014-06-04 | 2015-02-11 | 秦少平 | Detector-array-based fluid particle measuring instrument |
| CN105786071A (en) * | 2014-12-24 | 2016-07-20 | 联芯科技有限公司 | Low-dropout linear voltage stabilizing circuit and low-dropout linear voltage stabilizing device |
| CN105355704A (en) * | 2015-12-01 | 2016-02-24 | 天津飞讯伟业科技有限公司 | Symmetrical double-PIN balance photoelectric detector |
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Application publication date: 20220201 |