CN214101383U - Low-cost error code test circuit for automatic test of optical module - Google Patents
Low-cost error code test circuit for automatic test of optical module Download PDFInfo
- Publication number
- CN214101383U CN214101383U CN202023215132.6U CN202023215132U CN214101383U CN 214101383 U CN214101383 U CN 214101383U CN 202023215132 U CN202023215132 U CN 202023215132U CN 214101383 U CN214101383 U CN 214101383U
- Authority
- CN
- China
- Prior art keywords
- converter
- error code
- optical module
- test
- port
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
A low-cost error code test circuit for automatic test of an optical module comprises two DC-DC converters, the two DC-DC converters are respectively a first DC-DC converter and a second DC-DC converter, input ports of the first DC-DC converter and the second DC-DC converter are both connected with an input voltage Vcc, an output port of the first DC-DC converter is connected with a power supply port of the optical module, an output port of the second DC-DC converter is connected with a power supply port of the error code meter, wherein the error code meter and an optical module golden finger connector are designed on the same PCB, the golden finger connector of the optical module is connected with a high-speed signal of the error code meter through differential wiring of the PCB, so that the purchase cost of a coaxial cable can be saved, and test errors and instability brought by the coaxial cable connector can be eliminated, the whole error code instrument can be placed in a high-temperature and low-temperature test environment, so that the connection is simple and the operation is convenient.
Description
Technical Field
The utility model relates to an automatic test equipment field, concretely relates to a low-cost error code test circuit for automatic test of optical module.
Background
With the technical development of internet, big data and cloud computing, the usage amount of the optical module is larger and larger, and the optical module also has the trend of high speed and multiple channels. For example, a 400G optical module includes 8 TX channels and 8 RX channels, and if it is desired to test the optical module, at least 32 high-speed coaxial cables are required to build a complete transceiving test station on a conventional test board. This presents a challenge to the stability and cost of the test station.
SUMMERY OF THE UTILITY MODEL
In view of technical defect and the technical drawback that exist among the prior art, the embodiment of the utility model provides a overcome above-mentioned problem or solve a low-cost error code test circuit for optical module automated test of above-mentioned problem at least partially, concrete scheme is as follows:
a low-cost error code test circuit for automatic test of optical module comprises a DC-DC converter, an optical module and an error code meter, wherein the number of the DC-DC converters is two, and the two DC-DC converters are respectively a first DC-DC converter and a second DC-DC converter, the input ports of the first and second DC-DC converters are each connected to an input voltage Vcc, the output port of the first DC-DC converter is connected to the power supply port of the optical module, the output port of the second DC-DC converter is connected with the power supply port of the error code meter, the golden finger connector of the optical module is electrically connected with the high-speed signal test port of the error code meter through PCB differential wiring, the DC-DC converter, the optical module, the golden finger connector and the error code meter are printed on the same PCB.
Furthermore, the error code test circuit also comprises a blocking capacitor, and the blocking capacitor is connected in series with the PCB differential wiring.
Further, the DAC port of the error detector is electrically connected with the FB feedback port of the first DC-DC converter for outputting a control signal to the first DC-DC converter.
Further, the error code test circuit further comprises a power supply bias control circuit, the power supply bias control circuit comprises a resistor R1, a resistor R2 and a capacitor C1, a DAC port of the error code meter is electrically connected with the FB feedback port of the first DC-DC converter through the resistor R2, one end of the resistor R1 and one end of the capacitor C1 are grounded, and the other end of the resistor R1 and the other end of the capacitor C1 are electrically connected with the FB feedback port of the first DC-DC converter.
Further, the first DC-DC converter is composed of a first ISL8215M single-channel DC-DC step-down power chip and its peripheral circuits, and the second DC-DC converter is composed of a second ISL8215M single-channel DC-DC step-down power chip and its peripheral circuits.
Further, the error code instrument comprises a DSP mathematical signal processing unit and an MCU microprocessor, wherein the DSP mathematical signal processing unit is electrically connected with the MCU microprocessor, a power supply port of the MCU microprocessor is electrically connected with an output port of the second DC-DC converter, and a high-speed signal testing port of the DSP mathematical signal processing unit is electrically connected with the golden finger connector of the optical module through a PCB differential wiring.
Further, the DSP mathematical signal processing unit consists of an IN015050-MB02 chip and peripheral circuits thereof, and the MCU microprocessing unit consists of an ADuCM320 chip and peripheral circuits thereof.
Furthermore, the error code test circuit further comprises a current test unit, and the current test unit is connected in series to a connection line between the optical module and the first DC-DC converter.
Further, the current test unit is composed of a MAX9634 current detection chip and peripheral circuits thereof.
The utility model discloses following beneficial effect has:
the utility model provides a pair of a low-cost error code test circuit for automatic test of optical module, with error code appearance and optical module golden finger connector design at same piece PCB board, the golden finger connector of optical module passes through PCB difference with the high-speed signal of error code appearance and walks line connection, coaxial cable's purchase cost both can be saved like this, test error and instability that coaxial cable connector brought can be eliminated again, still can put into high low temperature test environment with the error code appearance complete machine, connect simply, convenient operation.
Drawings
Fig. 1 is a schematic diagram of a low-cost error code test circuit for an optical module automation test provided in an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a first DC-DC converter according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a second DC-DC converter according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram illustrating a DAC port of an error code analyzer outputting a control signal to an FB feedback port of a first DC-DC converter according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a high-speed signal testing port signal of the error code detector provided in the embodiment of the present invention;
fig. 6 is a schematic circuit diagram of an MCU microprocessor according to an embodiment of the present invention;
fig. 7 is a signal schematic diagram of the golden finger connector according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1, a low-cost error code testing circuit for automated testing of an optical module according to an embodiment of the present invention includes a DC-DC converter, an optical module and an error code detector, wherein the number of the DC-DC converters is two, and the two DC-DC converters are respectively a first DC-DC converter and a second DC-DC converter, the input ports of the first and second DC-DC converters are each connected to an input voltage Vcc, the output port of the first DC-DC converter is connected to the power supply port of the optical module, the output port of the second DC-DC converter is connected with the power supply port of the error code meter, the golden finger connector of the optical module is electrically connected with the high-speed signal test port of the error code meter through PCB differential wiring, the DC-DC converter, the optical module, the golden finger connector and the error code meter are printed on the same PCB.
The error code testing circuit further comprises a blocking capacitor, the blocking capacitor is connected in series with the differential wiring of the PCB, and in order to meet the protocol requirements, the blocking capacitor is encapsulated by 0201, and is blocked by a capacitor of 0.1uF, so that the signal line meets 100 ohms of differential impedance, and the DAC port of the error code meter is further electrically connected with the FB feedback port of the first DC-DC converter, so as to output a control signal to the first DC-DC converter, as shown in fig. 4.
The utility model provides a pair of a low-cost error code test circuit for automatic test of optical module, with error code appearance and optical module golden finger connector design at same piece PCB board, the golden finger connector of optical module passes through PCB difference with the high-speed signal of error code appearance and walks line connection, coaxial cable's purchase cost both can be saved like this, test error and instability that coaxial cable connector brought can be eliminated again, still can put into high low temperature test environment with the error code appearance complete machine, connect simply, convenient operation.
As shown in fig. 2-3, the first DC-DC converter is composed of a first ISL8215M single-channel DC-DC buck power chip and its peripheral circuits, and the second DC-DC converter is composed of a second ISL8215M single-channel DC-DC buck power chip and its peripheral circuits.
This the utility model discloses a 12V-DC power supply utilizes two DC-DC converters to change voltage into two mutually noninterfere 3.3V on the board to separately the power supply of error code appearance and the power supply of optical module. Meanwhile, by using thevenin voltage theorem, a voltage V _ M _ CTRL is output through a DAC of the error code instrument MCU, so that the voltage VOUT applied to the optical module by the first DC-DC converter is controlled, and a voltage bias test is performed, where a specific circuit is shown in fig. 4. The voltage is calculated as follows:
generally, when R1 is 9.53K and R2 is 100K, the relationship between the power bias and V _ M _ CTRL is shown in the following table:
| VOUT(V) | V_CTRL(V) |
| 3.135 | 1.027 |
| 3.3 | 0.645 |
| 3.465 | 0.263 |
the error code instrument comprises a DSP (digital signal processor) mathematical signal processing unit and an MCU (microprogrammed control unit) microprocessor, wherein the DSP mathematical signal processing unit is electrically connected with the MCU microprocessor, a power supply port of the MCU microprocessor is electrically connected with an output port of a second DC-DC (direct current-direct current) converter, a high-speed signal testing port of the DSP mathematical signal processing unit is electrically connected with a golden finger connector of an optical module through PCB (printed circuit board) differential wiring, the DSP mathematical signal processing unit consists of an IN015050-MB02 chip and a peripheral circuit thereof, and the MCU microprocessor consists of an ADuCM320 chip and a peripheral circuit thereof; the schematic circuit diagram of the MCU microprocessor is shown in fig. 6, the schematic signal diagram of the high-speed signal testing port is shown in fig. 5, and the schematic signal diagram of the gold finger connector is shown in fig. 7.
The error code test circuit also comprises a current test unit which is connected in series on a connecting line between the optical module and the first DC-DC converter, the current test unit consists of a MAX9634 current detection chip and a peripheral circuit thereof, and the current flowing through the optical module is detected by using the MAX9634 current detection chip, so that the power consumption of the optical module during working can be known.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (9)
1. A low-cost error code test circuit for the automatic test of an optical module is characterized by comprising a DC-DC converter, the optical module and an error code meter, wherein the number of the DC-DC converters is two, and the two DC-DC converters are respectively a first DC-DC converter and a second DC-DC converter, the input ports of the first and second DC-DC converters are each connected to an input voltage Vcc, the output port of the first DC-DC converter is connected to the power supply port of the optical module, the output port of the second DC-DC converter is connected with the power supply port of the error code meter, the golden finger connector of the optical module is electrically connected with the high-speed signal test port of the error code meter through PCB differential wiring, the DC-DC converter, the optical module, the golden finger connector and the error code meter are printed on the same PCB.
2. The low-cost error code test circuit for optical module automation test as claimed in claim 1, wherein the error code test circuit further comprises a blocking capacitor, and the blocking capacitor is connected in series to the PCB differential trace.
3. The low-cost error code test circuit for automated testing of optical modules according to claim 1, wherein the DAC port of the error code tester is further electrically connected to the FB feedback port of the first DC-DC converter for outputting the control signal to the first DC-DC converter.
4. The low-cost error code test circuit for the automatic test of the optical module as claimed in claim 3, wherein the error code test circuit further comprises a power bias control circuit, the power bias control circuit comprises a resistor R1, a resistor R2 and a capacitor C1, the DAC port of the error code meter is electrically connected to the FB feedback port of the first DC-DC converter through the resistor R2, one end of the resistor R1 and the capacitor C1 is grounded, and the other end of the resistor R1 and the capacitor C1 is electrically connected to the FB feedback port of the first DC-DC converter.
5. The low-cost error code test circuit for optical module automation test as claimed in claim 3, wherein the first DC-DC converter is composed of a first ISL8215M single channel DC-DC buck power chip and its peripheral circuits, and the second DC-DC converter is composed of a second ISL8215M single channel DC-DC buck power chip and its peripheral circuits.
6. The circuit of claim 1, wherein the error tester comprises a DSP mathematical signal processing unit and an MCU microprocessor, the DSP mathematical signal processing unit is electrically connected to the MCU microprocessor, a power supply port of the MCU microprocessor is electrically connected to an output port of the second DC-DC converter, and a high-speed signal testing port of the DSP mathematical signal processing unit is electrically connected to the gold finger connector of the optical module via a PCB differential trace.
7. The low-cost error code test circuit for the automatic test of the optical module as claimed IN claim 6, wherein the DSP mathematical signal processing unit is composed of an IN015050-MB02 chip and peripheral circuits thereof, and the MCU microprocessing is composed of an ADuCM320 chip and peripheral circuits thereof.
8. The circuit of claim 6, further comprising a current test unit connected in series to the connection line between the optical module and the first DC-DC converter.
9. The circuit of claim 8, wherein the current test unit comprises a MAX9634 current detection chip and its peripheral circuits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023215132.6U CN214101383U (en) | 2020-12-28 | 2020-12-28 | Low-cost error code test circuit for automatic test of optical module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023215132.6U CN214101383U (en) | 2020-12-28 | 2020-12-28 | Low-cost error code test circuit for automatic test of optical module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214101383U true CN214101383U (en) | 2021-08-31 |
Family
ID=77433817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023215132.6U Active CN214101383U (en) | 2020-12-28 | 2020-12-28 | Low-cost error code test circuit for automatic test of optical module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214101383U (en) |
-
2020
- 2020-12-28 CN CN202023215132.6U patent/CN214101383U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN212008827U (en) | Calibration device and automatic test equipment | |
| CN109828872A (en) | Signal-testing apparatus and method | |
| CN203025340U (en) | Test fixture detecting system | |
| CN102346464A (en) | 0-20mA or 4-20mA direct current analog quantity output device | |
| CN106291321B (en) | L abWindows/CVI-based plasma power supply circuit automatic test platform and method | |
| CN214101383U (en) | Low-cost error code test circuit for automatic test of optical module | |
| CN212258965U (en) | Automatic test system of radio frequency module | |
| CN212905201U (en) | Automatic power consumption test circuit of electronic product | |
| CN210720650U (en) | Circuit testing device | |
| CN110456210A (en) | 1553B network-bus trouble point checking method, apparatus and system | |
| CN116545393A (en) | Precise output amplifying circuit, load detection circuit and device using circuit | |
| CN218099530U (en) | Fuel cell voltage detection device and detection system | |
| CN105446258B (en) | Communication equipment comprehensive detection platform based on cpci bus transmission | |
| CN211785771U (en) | Current sampling circuit and fan driving system | |
| CN214540463U (en) | Relay board for switching and detecting multiple paths of signals | |
| CN210465605U (en) | Multifunctional circuit board fault intelligent detection system | |
| CN202217012U (en) | Microcurrent detection module | |
| CN220544853U (en) | Voltage conversion PCB board | |
| CN215986249U (en) | Voltage and waveform measuring device | |
| CN218350444U (en) | Single event effect measurement and control system of universal level conversion chip | |
| CN220273865U (en) | Audio testing device | |
| CN113009223A (en) | Impedance measuring method | |
| CN216209536U (en) | Test system, intelligent module and smart machine | |
| CN203054121U (en) | Current calibration system for sinusoidal AC motor protector | |
| CN220872584U (en) | Test adapter suitable for three-terminal voltage stabilizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |