CN201184906Y - Test system for avalanche breakdown voltage overload point - Google Patents
Test system for avalanche breakdown voltage overload point Download PDFInfo
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- CN201184906Y CN201184906Y CN 200820020201 CN200820020201U CN201184906Y CN 201184906 Y CN201184906 Y CN 201184906Y CN 200820020201 CN200820020201 CN 200820020201 CN 200820020201 U CN200820020201 U CN 200820020201U CN 201184906 Y CN201184906 Y CN 201184906Y
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Abstract
The utility model discloses an avalanche breakdown voltage overload point test system which comprises an element module and a boost circuit module. The boost circuit module carries out the boost of the voltage of an input pin of the element module, the avalanche breakdown voltage overload point test system is characterized in that, the test system further comprises a voltage detection module and a control detection module; wherein, an input end of the voltage detection module receives an output signal of the boost circuit module, a first output end thereof outputs a feedback signal to the input end of the control detection module; the control detection module receives the feedback signal which is output by the voltage detection module, carries out the detection processing of the feedback signal, judges whether an overload point is achieved or not and simultaneously outputs a voltage signal of the pin to the boost circuit module. The avalanche breakdown voltage overload point test system can solve the technical problems that a manual test element in the prior art has larger error, lower efficiency, easy damage of the element when in avalanche breakdown voltage overload point.
Description
Technical field
The utility model relates to a kind of system that component parameter is tested, and specifically, relates to a kind of system that components and parts avalanche breakdown voltage overload point is tested.
Background technology
The avalanche breakdown voltage overload point is a very important parameter of optical component, if be applied to the avalanche breakdown voltage overload point that magnitude of voltage on the components and parts surpasses these components and parts, will influence the performance of components and parts, can damage components and parts when serious.At first when using components and parts, the avalanche breakdown voltage overload point that adopts element producer to provide usually.Later stage finds that in use the parameter value that element producer provides is entirely accurate not, therefore often adopts the manual test method to measure components and parts avalanche breakdown voltage overload point.But because the manual test method is open-loop test, depend on tester's experience level and measuring technology ability to a great extent, the human factor that produces error in the test process is more, causes the test result error bigger, and testing efficiency is lower.And the manual test method only pays attention to testing whether reaching overload point, and the dynamics of effectively protecting when components and parts are met or exceeded overload point is limited, so the spoilage of components and parts is higher in the manual test process.
Summary of the invention
Manual test components and parts avalanche breakdown voltage overload point time error is big in the prior art, efficient is low and components and parts damage the technical matters of damaging easily in order to solve for the utility model, a kind of avalanche breakdown voltage overload point test macro is provided, can carry out closed loop to the avalanche breakdown voltage overload point of components and parts and detect automatically, improve testing efficiency.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of avalanche breakdown voltage overload point test macro, comprise component module and booster circuit module, described booster circuit module is boosted to the voltage of component module input pin, it is characterized in that, described test macro also comprises voltage detection module and control detection module; Wherein, described voltage detection module input end receives the output signal of booster circuit module, and its first output terminal output feedback signal is to the input end of described control detection module; Described control detection module receives the feedback signal of voltage detection module output, feedback signal is detected processing, and judge whether to reach overload point, and the output pin voltage signal is to the booster circuit module simultaneously.
During for the solution overtension components and parts are carried out the technical matters of power-off protection, described test macro also comprises energy supply control module; Described energy supply control module input end receives the control signal of control detection module output, and its output terminal is connected with component module power end, booster circuit modular power source end and voltage detection module power end respectively.
Further, comprise a power switch chip in the described energy supply control module, the Enable Pin of described chip is connected with the control signal output ends of control detection module.
Again further, described control detection module comprises primary processor and signal transceiver, and described signal transceiver receives the feedback signal of voltage detection module output, and this signal is transferred to primary processor; Primary processor is handled back output corresponding results signal to signal, and by signal transceiver described consequential signal is transferred to energy supply control module; Described primary processor and signal transceiver carry out communication by the communication interface circuit.
Above-mentioned communication interface circuit comprises a RS232 changes the I2C interface module; Wherein, the RXD pin of described module is connected with the RXD pin with the TXD pin of described primary processor respectively with the TXD pin, and its SCL pin is connected with the SDA pin is corresponding with the SCL pin of signal transceiver respectively with the SDA pin.By the reliable communicating between RS232 commentaries on classics I2C interface module realization primary processor and the signal transceiver.
Again further, described booster circuit module output pulse signal is to signal transceiver, and described primary processor judges whether to reach overload point according to described pulse signal.
Again further, described voltage detection module comprises a current detecting chip, described current detecting chip input end receives the output signal of booster circuit module, its first output terminal is converted to current signal voltage signal and transfers to the control detection module by output conversion circuit, its second output terminal is connected with the input pin of component module, and the voltage signal after the booster circuit module is boosted exports component module to.
Preferably, described output conversion circuit is the circuit that resistance and electric capacity are formed in parallel.
Further, the resistance value of choose reasonable booster circuit module can be adjusted to the scope of boosting of booster circuit module 40V～60V or two gears of 50V～70V, to satisfy the demand of the different components and parts avalanche breakdown voltage overload points of test.
Compared with prior art, advantage of the present utility model and good effect are:
1, by in test macro, increasing voltage detection module and control detection module, components and parts are monitored leg signal to transfer to the control detection module as feedback signal and detects processing, according to the voltage that detects result controlling parts input pin, both realized the automatic measuring ability of overload point, testing process with overload point becomes a closed loop testing process simultaneously, improve detection efficiency, reduced test error again.
2, by increasing energy supply control module; power supply according to output signal controlling parts module, booster circuit module and the voltage detection module of control detection module; can when appearring in test macro, unsafe condition cut off the power supply of module automatically; protect each module, especially components and parts effectively, prevent to burn because of overvoltage.
3, by the pulse signal of booster circuit module and the feedback signal of voltage detection module are input to the judgement of carrying out overload point in the control detection module simultaneously, the detection mode variation has further improved the security performance of testing process.
4, the normal feedback signal that whether receives according to the primary processor in the control detection module can detect total system at any time and whether be in normal connection duty in testing process, realized the function of the automatic debugging of system running state.
Description of drawings
Fig. 1 is the theory diagram of the utility model overload point test macro;
Fig. 2 is the theory diagram of control detection module among Fig. 1;
Fig. 3 is the circuit diagram of control detection module among embodiment of the utility model;
Fig. 4 is the circuit diagram of energy supply control module among the embodiment;
Fig. 5 is the circuit diagram of booster circuit module among the embodiment;
Fig. 6 is the circuit diagram of voltage detection module among the embodiment;
Fig. 7 is the circuit diagram of BOSA installed module among the embodiment.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
Referring to illustrated in figures 1 and 2, the utility model avalanche breakdown voltage overload point test macro control detection module, booster circuit module, voltage detection module, energy supply control module and component module.The control detection module is handled the signal of booster circuit module and voltage detection module feedback according to the various performance parameters of the components and parts of having stored in the module, and output is applied to the voltage signal of components and parts input pin according to result.The booster circuit module is boosted the voltage of control detection module output, obtains corresponding high voltage, and is input to the input pin of component module by voltage detection module; The booster circuit module is also exported a pulse signal and is transferred out the control detection module as feedback signal simultaneously, as the foundation that judges whether to reach overload point.Voltage detection module detects the variation of component module voltage, and voltage signal processed is transferred to the control detection module as feedback signal, as the foundation that judges whether to reach overload point.In addition, the power end of booster circuit module, component module and voltage detection module is connected with energy supply control module respectively, and control detection module output control signal is controlled the energy supply control module duty.If be applied to overtension on the components and parts, during near precarious position, the control detection module output signal is to energy supply control module, cuts off the power supply of module such as components and parts, prevents the damage that overtension causes components and parts.
The control detection module comprises primary processor and signal transceiver, and primary processor and signal transceiver carry out the transmission of signal by the communication interface circuit.Signal transceiver is responsible for receiving feedback signals, and feedback signal is transferred to primary processor; Receive primary processor control signals transmitted and pin voltage signal simultaneously, and this signal is sent.Primary processor is controlled components and parts input pin voltage by man-machine interface as the control core cell of whole test system, detects whether to reach the avalanche breakdown voltage overload point, and detects the duty of whole test system.
Embodiment one: Fig. 3 utilizes described circuit diagram can the avalanche breakdown voltage overload point of bidirectional transmit-receive assembly BOSA be detected to the circuit structure diagram that Figure 7 shows that an embodiment of the utility model.
Wherein, Fig. 3 is the circuit diagram of control detection module section among the embodiment one.Among the figure, U1 is a signal transceiver, and U1 carries out communication by communication interface circuit T1 and primary processor, and comprising a RS232 among the communication interface circuit T1 changes the I2C interface module, can realize the conversion of signals of RS232 and I2C bus, guarantee the reliable communicating between primary processor and the signal transceiver.
Figure 4 shows that the circuit diagram of energy supply control module part among the embodiment one.Wherein, U2 is a power switch chip, and its output can be boost module, component module and voltage detection module working power is provided.
Fig. 5 is the circuit diagram of booster circuit module section among the embodiment one.Among the figure, U3 is the chip that boosts, and the voltage that is applied on the components and parts input pin can be boosted.
Figure 6 shows that the circuit diagram of voltage detection module part among the embodiment one.Among the figure, U4 is a current detecting chip, and the feedback current of its first output terminal OUT output converts corresponding feedback voltage signal to by the parallel circuit of resistance R 21 and capacitor C 50, and its second output terminal REF is connected with the input pin 1 of BOSA.
Figure 7 shows that the circuit diagram of BOSA installed module.
The concrete course of work of embodiment one entire circuit is as follows:
U1 receives control information from primary processor by SDA pin and SCL pin, and the Enable Pin EN by D3 pin control U2 enables then, output pin VOUT output U3, the U4 of U2 and the operating voltage of BOSA module.
U1 receives the data message that boosts from primary processor by SDA pin and SCL pin, because input voltage and its output voltage of U3 be inversely proportional to, and the BOSA input pin voltage that obtain increasing by U3, the U3 input voltage should reduce.So U1 is according to the data message that boosts of primary processor, the corresponding step-down signal of output is to the FB pin of U3 on output pin DAC1.Then, on the output pin CS-of U3, produce corresponding high voltage.This high voltage signal at first flows into the BIAS input pin of U4, transfers to the input pin 1 of BOSA module then by the REF pin of U4.The output pin OUT output feedback current signal of U4, this current signal converts corresponding feedback voltage signal to by the parallel circuit of resistance R 21 and capacitor C 50, described feedback voltage signal transfers to the outer monitoring pin MON1 of U1, and this feedback voltage signal also is a monitoring voltage signal.U1 transfers to primary processor with the feedback voltage signal of MON1 by T1.If feedback voltage signal information is normal, continue to reduce the voltage of DAC1 pin output, the voltage that feeds back until the OUT pin from U4 reaches predetermined magnitude of voltage.Described magnitude of voltage is determined by the resistance value of resistance R 46, R44, R13, R5 and R50 in the circuit, and predetermined maximum voltage value is the avalanche breakdown voltage overload point of BOSA device.If when reaching predetermined magnitude of voltage, system still is under the normal operating conditions, show that the BOSA device of testing at present is qualified device.
If in the process of boosting, the constant or unexpected change of voltage of the OUT pin of U3 feedback is big, and then the pin EN of the pin D3 control U2 by U1 closes, and the pin VOUT that makes U2 is output services voltage not.
In addition, U3 is in the output HIGH voltage signal, also by the pin D1 of pin CL output feedback pulse signal to U1.U1 transfers to primary processor with the feedback pulse signal of pin D1 by T1, and primary processor judges whether the CL pin overload signal occurs.When overload signal appearred in the CL pin, expression had reached overload point, otherwise can continue to increase gradually the voltage of the input pin of BOSA, promptly continued to reduce the voltage of DAC1 pin output.
Whether system reaches in the process of overload point in whole test, if primary processor does not receive rational feedback signal, then can the judgement system be in improper duty, whether open circuit, realize the automatic spell-checking facility of system by man-machine interface alert check system.
The scope of boosting of booster circuit module is determined according to the resistance of resistance R 2, R13, R23, R44 and R50, resistance by choose reasonable resistance, the scope of boosting of booster circuit module can be adjusted to 40V～60V and two gears of 50V～70V, can satisfy the testing requirement of different components and parts avalanche breakdown voltage overload points.
Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection domain of the present utility model.
Claims (10)
1, a kind of avalanche breakdown voltage overload point test macro, comprise component module and booster circuit module, described booster circuit module is boosted to the voltage of component module input pin, it is characterized in that, described test macro also comprises voltage detection module and control detection module; Wherein, described voltage detection module input end receives the output signal of booster circuit module, and its first output terminal output feedback signal is to the input end of described control detection module; Described control detection module receives the feedback signal of voltage detection module output, feedback signal is detected processing, and judge whether to reach overload point, and the output pin voltage signal is to the booster circuit module simultaneously.
2, voltage overload point test macro according to claim 1 is characterized in that, described test macro also comprises energy supply control module; Described energy supply control module input end receives the control signal of control detection module output, and its output terminal is connected with component module power end, booster circuit modular power source end and voltage detection module power end respectively.
3, voltage overload point test macro according to claim 2 is characterized in that, comprises a power switch chip in the described energy supply control module, and the Enable Pin of described chip is connected with the control signal output ends of control detection module.
4, according to each described voltage overload point test macro of claim 1 to 3, it is characterized in that, described control detection module comprises primary processor and signal transceiver, and described signal transceiver receives the feedback signal of voltage detection module output, and this signal is transferred to primary processor; Primary processor is handled back output corresponding results signal to signal, and by signal transceiver described consequential signal is transferred to energy supply control module; Described primary processor and signal transceiver carry out communication by the communication interface circuit.
According to the described voltage overload point test macro of claim 4, it is characterized in that 5, described communication interface circuit comprises a RS232 changes the I2C interface module; Wherein, the RXD pin of described module is connected with the RXD pin with the TXD pin of described primary processor respectively with the TXD pin, and its SCL pin is connected with the SDA pin is corresponding with the SCL pin of signal transceiver respectively with the SDA pin.
6, voltage overload point test macro according to claim 4 is characterized in that, also output pulse signal is to signal transceiver for described booster circuit module, and described primary processor judges whether to reach overload point according to described pulse signal.
7, voltage overload point test macro according to claim 1, it is characterized in that, described voltage detection module comprises a current detecting chip, described current detecting chip input end receives the output signal of booster circuit module, and its first output terminal is converted to current signal voltage signal and transfers to the control detection module by output conversion circuit.
8, voltage overload point test macro according to claim 7 is characterized in that, described output conversion circuit is the circuit that resistance and electric capacity are formed in parallel.
9, according to claim 7 or 8 described voltage overload point test macros, it is characterized in that second output terminal of described current detecting chip is connected with the input pin of component module, exports voltage signal to component module.
10, voltage overload point test macro according to claim 1 is characterized in that, the scope of boosting of described booster circuit module is 40V～60V or 50V～70V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820020201 CN201184906Y (en) | 2008-04-02 | 2008-04-02 | Test system for avalanche breakdown voltage overload point |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200820020201 CN201184906Y (en) | 2008-04-02 | 2008-04-02 | Test system for avalanche breakdown voltage overload point |
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| CN201184906Y true CN201184906Y (en) | 2009-01-21 |
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| CN 200820020201 Expired - Lifetime CN201184906Y (en) | 2008-04-02 | 2008-04-02 | Test system for avalanche breakdown voltage overload point |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621459A (en) * | 2012-03-31 | 2012-08-01 | 上海宏力半导体制造有限公司 | Drain-source breakdown voltage test device and drain-source breakdown voltage test method |
| CN103389451A (en) * | 2013-07-24 | 2013-11-13 | 广东瑞谷光纤通信有限公司 | Testing method and testing device of avalanche photodiode |
| CN108896897A (en) * | 2018-05-24 | 2018-11-27 | 温州大学 | A kind of two end transit time device Steady-state Parameters measuring devices |
| CN111431613A (en) * | 2020-03-20 | 2020-07-17 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN114814517A (en) * | 2022-06-27 | 2022-07-29 | 杭州宇称电子技术有限公司 | Method for measuring SPAD single-point avalanche voltage in chip and application thereof |
-
2008
- 2008-04-02 CN CN 200820020201 patent/CN201184906Y/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102621459A (en) * | 2012-03-31 | 2012-08-01 | 上海宏力半导体制造有限公司 | Drain-source breakdown voltage test device and drain-source breakdown voltage test method |
| CN103389451A (en) * | 2013-07-24 | 2013-11-13 | 广东瑞谷光纤通信有限公司 | Testing method and testing device of avalanche photodiode |
| CN103389451B (en) * | 2013-07-24 | 2015-12-02 | 广东瑞谷光纤通信有限公司 | A kind of method of testing of avalanche photodide and proving installation |
| CN108896897A (en) * | 2018-05-24 | 2018-11-27 | 温州大学 | A kind of two end transit time device Steady-state Parameters measuring devices |
| CN108896897B (en) * | 2018-05-24 | 2019-08-30 | 温州大学 | A kind of two end transit time device Steady-state Parameters measuring devices |
| CN111431613A (en) * | 2020-03-20 | 2020-07-17 | 青岛海信宽带多媒体技术有限公司 | Optical module |
| CN114814517A (en) * | 2022-06-27 | 2022-07-29 | 杭州宇称电子技术有限公司 | Method for measuring SPAD single-point avalanche voltage in chip and application thereof |
| CN114814517B (en) * | 2022-06-27 | 2022-09-13 | 杭州宇称电子技术有限公司 | Method for measuring SPAD single-point avalanche voltage in chip and application thereof |
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Granted publication date: 20090121 |
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