RSSI (Received Signal Strength Indicator) acquisition and protection circuit and monitoring system of Combo optical module
By using a processor-controlled dual-channel RSSI acquisition and protection circuit, combined with a single-pole double-throw switch and a dual-channel operational amplifier chip, the space occupation and cost issues of the Combo optical module monitoring circuit are solved, and high-precision optical power monitoring is achieved.
Patent Information
- Application Number
- CN202520464630.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-03-17
AI Technical Summary
Existing Combo optical module monitoring circuits suffer from the problem of large component space requirements and high cost when maintaining high precision.
The RSSI data acquisition and protection circuit employs a processor, a dual-channel hold module, and a dual-channel sampling module. It includes a single-pole double-throw switch, resistors, filter capacitors, and a dual-channel operational amplifier chip. The processor controls the single-pole double-throw switch to charge and discharge, enabling high-precision monitoring of the uplink optical power signals of the two paths.
It achieves a highly integrated circuit design, saves PCB layout space, reduces deployment costs, and improves the accuracy and stability of optical power monitoring.
Smart Images
Figure CN223872289U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of optical monitoring integrated circuit technology, specifically relating to an RSSI acquisition and protection circuit and monitoring system for a Combo optical module. Background Technology
[0002] With the application of GPON (Gigabit-Capable PON) technology, 100 Mbps broadband has become widespread in my country. The leap from 100 Mbps to 1 Gbps requires XG(S)-PON modules to maintain compatibility with the previous generation of GPON while also achieving bandwidth improvements. Module manufacturers have introduced Combo modules, which integrate XG(S)-PON and GPON into a single module.
[0003] In optical communication systems, to ensure the reliability and stability of transmission and reception, and to avoid bit errors caused by excessive or insufficient received optical power, it is necessary to monitor the received optical power of the optical module in real time.
[0004] In the Combo module, it is necessary to monitor the receiving power of both channels in real time. Therefore, two RSSI (Received Signal Strength Indication) sample-and-hold circuits are required inside the module to monitor the uplink optical power of the GPON and XG(S)PON ends respectively.
[0005] Existing monitoring circuits suffer from drawbacks such as large component footprint and relatively high cost when maintaining high precision. Utility Model Content
[0006] The purpose of this invention is to provide an RSSI acquisition and protection circuit and monitoring system for a Combo optical module, in order to solve the problems of existing monitoring circuits having large component space requirements and relatively high costs when maintaining high precision.
[0007] To achieve the above objectives, the present invention adopts the following technical solution:
[0008] In a first aspect, this utility model provides an RSSI sampling and holding circuit for a Combo optical module, comprising: a processor, a dual-channel holding module, and a dual-channel sampling module;
[0009] The processor's charge / discharge control terminal is electrically connected to the charge / discharge controlled terminal of the dual-channel sampling module.
[0010] The signal output terminal of the dual-channel sampling module is electrically connected to the signal input terminal of the dual-channel holding module; the signal input terminal of the dual-channel sampling module is used to acquire the two uplink optical power signals output by the Combo optical module.
[0011] The signal output terminal of the dual-channel hold module is electrically connected to the signal sampling terminal of the processor. The dual-channel hold module is used to hold and amplify the two uplink optical power signals acquired by the dual-channel sampling module, respectively.
[0012] Preferably, the dual-channel sampling module includes: a single-pole double-throw switch, a first resistor, and a second resistor;
[0013] The first end of the first resistor is electrically connected to the first channel input terminal of the single-pole double-throw switch; the first end of the second resistor is electrically connected to the second channel input terminal of the single-pole double-throw switch.
[0014] The second terminals of both the first resistor and the second resistor are grounded;
[0015] The first end of the first resistor and the first end of the second resistor are used as the signal input terminals of the dual-channel sampling module; the single-pole double-throw switch includes a first channel output terminal and a second channel output terminal, and the first channel output terminal and the second channel output terminal of the single-pole double-throw switch are used as the signal output terminals of the dual-channel sampling module.
[0016] Preferably, the dual-channel sampling module further includes: a first filter capacitor and a second filter capacitor;
[0017] The first terminal of the first filter capacitor is electrically connected to the first terminal of the first resistor, and the first terminal of the second filter capacitor is electrically connected to the first terminal of the second resistor; the second terminals of both the first filter capacitor and the second filter capacitor are grounded.
[0018] Preferably, the dual-channel holding module includes: a dual-channel operational amplifier chip, a first holding capacitor, and a second holding capacitor;
[0019] The first terminal of the first holding capacitor is electrically connected to the first channel input terminal of the dual-channel operational amplifier chip; the first terminal of the second holding capacitor is electrically connected to the second channel input terminal of the dual-channel operational amplifier chip.
[0020] The second terminals of both the first holding capacitor and the second holding capacitor are grounded.
[0021] The first channel input terminal and the second channel input terminal of the dual-channel operational amplifier chip are used as the signal input terminals of the dual-channel hold module; the first channel input terminal of the dual-channel operational amplifier chip is electrically connected to the first channel output terminal of the single-pole double-throw switch, and the second channel input terminal of the dual-channel operational amplifier chip is electrically connected to the second channel output terminal of the single-pole double-throw switch;
[0022] The first channel output terminal and the second channel output terminal of the dual-channel operational amplifier chip are used as the signal output terminals of the dual-channel hold module and are electrically connected to the signal sampling terminal of the processor.
[0023] Preferably, the dual-channel operational amplifier chip includes two operational amplifiers.
[0024] Preferably, the single-pole double-throw switch further includes a first channel switching terminal, a second channel switching terminal, a first channel discharge terminal, and a second channel discharge terminal, wherein the first channel switching terminal and the second channel switching terminal of the single-pole double-throw switch are used as the charge and discharge controlled terminals of the dual-channel sampling module and are electrically connected to the charge and discharge control terminal of the processor.
[0025] Both the first channel discharge terminal and the second channel discharge terminal of the single-pole double-throw switch are electrically connected to the processor.
[0026] The processor is used to control the connection and disconnection between the first channel output terminal of the single-pole double-throw switch and the first channel input terminal and the first channel discharge terminal of the single-pole double-throw switch, respectively; and to control the connection and disconnection between the second channel output terminal of the single-pole double-throw switch and the second channel input terminal and the second channel discharge terminal of the single-pole double-throw switch, respectively.
[0027] When the first channel output terminal of the single-pole double-throw switch is connected to the first channel discharge terminal of the single-pole double-throw switch, the first holding capacitor is discharged; when the second channel output terminal of the single-pole double-throw switch is connected to the second channel discharge terminal of the single-pole double-throw switch, the second holding capacitor is discharged.
[0028] Secondly, this utility model provides a monitoring system for a Combo optical module, the monitoring system comprising:
[0029] RSSI data acquisition and protection circuit of Combo optical module;
[0030] The processor of the RSSI acquisition and protection circuit of the Combo optical module is connected to the host computer for communication.
[0031] Preferably, the processor is an STM32 microcontroller.
[0032] Beneficial effects:
[0033] 1. The RSSI sampling and holding circuit of this utility model mainly consists of a processor, a dual-channel holding module and a dual-channel sampling module, which has high integration and saves PCB layout space;
[0034] 2. The charging and discharging control terminal of the processor of this utility model is electrically connected to the charging and discharging controlled terminal of the dual-channel sampling module. Therefore, the dual-channel holding module can be discharged to release the uplink optical power signal held in the dual-channel holding module and improve the sampling accuracy.
[0035] 3. The monitoring system of the Combo optical module of this utility model has the advantage of low deployment cost. Attached Figure Description
[0036] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:
[0037] Figure 1 This is a block diagram of the RSSI data acquisition and protection circuit of the Combo optical module provided in one embodiment of this utility model;
[0038] Figure 2 This is a schematic diagram of a dual-channel sampling module provided in one embodiment of this utility model;
[0039] Figure 3 This is a schematic diagram of a dual-channel holding module provided in one embodiment of this utility model;
[0040] Figure 4 This is a schematic diagram of the RSSI data acquisition and protection circuit of the Combo optical module provided in one embodiment of this utility model;
[0041] Figure 5 This is a block diagram of a monitoring system for a Combo optical module provided in one embodiment of this utility model;
[0042] Explanation of reference numerals in the attached figures:
[0043] U1, Single-pole double-throw switch; R1, First resistor; R2, Second resistor; C1, First filter capacitor; C2, Second filter capacitor; U2, Dual-channel operational amplifier chip; C3, First holding capacitor; C4, Second holding capacitor. Detailed Implementation
[0044] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.
[0045] Example 1
[0046] Figure 1 This is a block diagram of the RSSI data acquisition and protection circuit of a Combo optical module provided in one embodiment of this utility model. Figure 1 As shown, this embodiment provides an RSSI sampling and holding circuit for a Combo optical module, including: a processor, a dual-channel hold module, and a dual-channel sampling module; in this embodiment, the processor can be an STM32 series microcontroller;
[0047] The processor's charge / discharge control terminal is electrically connected to the charge / discharge controlled terminal of the dual-channel sampling module.
[0048] The signal output terminal of the dual-channel sampling module is electrically connected to the signal input terminal of the dual-channel holding module; the signal input terminal of the dual-channel sampling module is used to acquire the two uplink optical power signals output by the Combo optical module; that is, the signal input terminal of the dual-channel sampling module has two channels, one of which is connected to the GPON terminal of the Combo module and the other is connected to the XG(S)PON terminal of the Combo module, outputting the optical signal as a current signal for the dual-channel sampling module to acquire the signal;
[0049] The signal output terminal of the dual-channel hold module is electrically connected to the signal sampling terminal of the processor. The dual-channel hold module is used to hold and amplify the two uplink optical power signals acquired by the dual-channel sampling module, respectively.
[0050] The RSSI sampling and holding circuit of this invention mainly consists of a processor, a dual-channel holding module, and a dual-channel sampling module. It has high integration, saves PCB layout space, and can reduce costs.
[0051] In this embodiment, the dual-channel sampling module includes: a single-pole double-throw switch U1, a first resistor R1, and a second resistor R2;
[0052] The first end of the first resistor R1 is electrically connected to the first channel input terminal of the single-pole double-throw switch U1; the first end of the second resistor R2 is electrically connected to the second channel input terminal of the single-pole double-throw switch U1.
[0053] The second terminal of the first resistor R1 and the second terminal of the second resistor R2 are both grounded;
[0054] The first end of the first resistor R1 and the first end of the second resistor R2 are used as the signal input terminals of the dual-channel sampling module; the single-pole double-throw switch U1 includes a first channel output terminal and a second channel output terminal, and the first channel output terminal and the second channel output terminal of the single-pole double-throw switch U1 are used as the signal output terminals of the dual-channel sampling module.
[0055] In this embodiment, the single-pole double-throw switch U1 is a two-channel, low-loss type with fast opening and closing speed, such as... Figure 2 As shown, the single-pole double-throw switch U1 has 10 pins. The V+ pin is connected to the VCC power supply, the NO1 pin is the first channel input terminal of the single-pole double-throw switch U1, the NO2 pin is the second channel input terminal of the single-pole double-throw switch U1, the COM1 pin is the first channel output terminal of the single-pole double-throw switch U1, and the COM2 pin is the second channel output terminal of the single-pole double-throw switch U1.
[0056] In this embodiment, the optical signal is converted into a current signal. After the current signal is input to the signal input terminal, the first resistor R1 and the second resistor R2 can convert the current signal into a voltage signal. By analyzing the voltage signal, the power signals of the two optical signals can be monitored.
[0057] As a further optimization of this embodiment, such as Figure 2 As shown, the dual-channel sampling module further includes: a first filter capacitor C1 and a second filter capacitor C2;
[0058] The first terminal of the first filter capacitor C1 is electrically connected to the first terminal of the first resistor R1, and the first terminal of the second filter capacitor C2 is electrically connected to the first terminal of the second resistor R2; the second terminals of the first filter capacitor C1 and the second terminal of the second filter capacitor C2 are both grounded.
[0059] In this embodiment, the first filter capacitor C1 is used to filter the voltage signal of the first channel, and the second filter capacitor C2 is used to filter the voltage signal of the second channel, so that the voltage signal is more stable, the sampling accuracy is improved, and thus the accuracy of optical power monitoring is improved.
[0060] As a further optimization of this embodiment, such as Figure 3 As shown, the dual-channel holding module includes: a dual-channel operational amplifier chip U2, a first holding capacitor C3, and a second holding capacitor C4; in this embodiment, the dual-channel operational amplifier chip U2 is a dual-channel, high-precision, low-noise operational amplifier, which contains two operational amplifiers, each amplifying the voltage signals of the two channels respectively.
[0061] The first terminal of the first holding capacitor C3 is electrically connected to the first channel input terminal of the dual-channel operational amplifier chip U2; the first terminal of the second holding capacitor C4 is electrically connected to the second channel input terminal of the dual-channel operational amplifier chip U2.
[0062] The second terminals of the first holding capacitor C3 and the second holding capacitor C4 are both grounded;
[0063] The first channel input terminal and the second channel input terminal of the dual-channel operational amplifier chip U2 are used as the signal input terminals of the dual-channel hold module; the first channel input terminal of the dual-channel operational amplifier chip U2 is electrically connected to the first channel output terminal of the single-pole double-throw switch U1, and the second channel input terminal of the dual-channel operational amplifier chip U2 is electrically connected to the second channel output terminal of the single-pole double-throw switch U1.
[0064] The first channel output terminal and the second channel output terminal of the dual-channel operational amplifier chip U2 are used as the signal output terminals of the dual-channel hold module and are electrically connected to the signal sampling terminal of the processor.
[0065] In this embodiment, the voltage signal output from the first channel output terminal of the single-pole double-throw switch U1 charges the first holding capacitor C3. When it stabilizes, the voltage value of the first holding capacitor C3 is the same as the voltage of the first resistor R1. The first holding capacitor C3 can hold the voltage signal, that is, hold the optical power signal. At this time, the level of the voltage signal reflects the magnitude of the optical power. The voltage signal is then amplified by the dual-channel operational amplifier chip U2, which can further improve the stability of the voltage signal. The amplified voltage signal is sampled by the processor.
[0066] As a further optimization of this embodiment, such as Figure 2 and Figure 4 As shown, in Figure 4 In this context, U4 is the processor, and the single-pole double-throw switch U1 further includes a first channel switching terminal, a second channel switching terminal, a first channel discharge terminal, and a second channel discharge terminal; wherein, the first channel switching terminal is... Figure 2 The IN1 pin in the middle, the second channel switching terminal is Figure 2 The IN2 pin in the middle, the first channel discharge terminal is Figure 2 The NC1 pin in the middle, the second channel discharge terminal is Figure 2 The NC2 pin in the middle.
[0067] The first channel switching terminal and the second channel switching terminal of the single-pole double-throw switch U1 are used as the charging and discharging controlled terminals of the dual-channel sampling module and are electrically connected to the charging and discharging control terminal of the processor.
[0068] The first channel discharge terminal and the second channel discharge terminal of the single-pole double-throw switch U1 are both electrically connected to the processor.
[0069] The processor is used to control the connection and disconnection between the first channel output terminal of the single-pole double-throw switch U1 and the first channel input terminal and the first channel discharge terminal of the single-pole double-throw switch U1, respectively; and to control the connection and disconnection between the second channel output terminal of the single-pole double-throw switch U1 and the second channel input terminal and the second channel discharge terminal of the single-pole double-throw switch U1, respectively.
[0070] When the first channel output terminal of the single-pole double-throw switch U1 is connected to the first channel discharge terminal of the single-pole double-throw switch U1, the first holding capacitor C3 is discharged; when the second channel output terminal of the single-pole double-throw switch U1 is connected to the second channel discharge terminal of the single-pole double-throw switch U1, the second holding capacitor C4 is discharged.
[0071] During the sampling process, taking the first channel as an example, the processor outputs a TRIG_A signal. When the TRIG_A signal is high, the N01 pin is connected to the COM1 pin. At this time, the voltage signal on the first resistor R1 is output to the dual-channel holding module, charging the first holding capacitor C3 of the dual-channel holding module. When the TRIG_A signal is low, the NC1 pin is connected to the COM1 pin. At this time, the first holding capacitor C3 is connected to the processor, and the first holding capacitor C3 begins to discharge until it is completely discharged. After discharge, the next sampling can be performed. This method can ensure that the state is consistent after each sampling, thus improving the sampling accuracy.
[0072] In this embodiment, the conduction time of the single-pole double-throw switch U1 is controlled by adjusting the width of the TRIG_A signal output by the processor.
[0073] Example 2
[0074] Figure 5 This is a block diagram of a monitoring system for a Combo optical module provided in one embodiment of this utility model. Figure 5 As shown, this embodiment provides a monitoring system for a Combo optical module, the monitoring system comprising:
[0075] RSSI data acquisition and protection circuit of the Combo optical module in Example 1;
[0076] The processor of the RSSI acquisition and protection circuit of the Combo optical module is connected to the host computer for communication.
[0077] In this embodiment, after the processor collects the voltage signals of the two channels, it reports them to the host computer. The host computer then displays the voltage signals of the two channels, thereby realizing real-time monitoring of the uplink optical power of the GPON and XG(S)PON ends of the Combo module.
[0078] Therefore, the monitoring system of the Combo optical module of this invention has the advantage of low deployment cost.
[0079] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.
Claims
1. An RSSI data acquisition and protection circuit for a Combo optical module, characterized in that, include: Processor, dual-channel hold module, and dual-channel sampling module; The processor's charge / discharge control terminal is electrically connected to the charge / discharge controlled terminal of the dual-channel sampling module. The signal output terminal of the dual-channel sampling module is electrically connected to the signal input terminal of the dual-channel holding module; the signal input terminal of the dual-channel sampling module is used to acquire the two uplink optical power signals output by the Combo optical module. The signal output terminal of the dual-channel hold module is electrically connected to the signal sampling terminal of the processor. The dual-channel hold module is used to hold and amplify the two uplink optical power signals acquired by the dual-channel sampling module, respectively.
2. The RSSI data acquisition and protection circuit of the Combo optical module according to claim 1, characterized in that, The dual-channel sampling module includes: a single-pole double-throw switch, a first resistor, and a second resistor; The first end of the first resistor is electrically connected to the first channel input terminal of the single-pole double-throw switch; the first end of the second resistor is electrically connected to the second channel input terminal of the single-pole double-throw switch. The second terminals of both the first resistor and the second resistor are grounded; The first end of the first resistor and the first end of the second resistor are used as the signal input terminals of the dual-channel sampling module; the single-pole double-throw switch includes a first channel output terminal and a second channel output terminal, and the first channel output terminal and the second channel output terminal of the single-pole double-throw switch are used as the signal output terminals of the dual-channel sampling module.
3. The RSSI acquisition and protection circuit of the Combo optical module according to claim 2, characterized in that, The dual-channel sampling module further includes: a first filter capacitor and a second filter capacitor; The first terminal of the first filter capacitor is electrically connected to the first terminal of the first resistor, and the first terminal of the second filter capacitor is electrically connected to the first terminal of the second resistor; the second terminals of both the first filter capacitor and the second filter capacitor are grounded.
4. The RSSI acquisition and protection circuit of the Combo optical module according to claim 2, characterized in that, The dual-channel holding module includes: a dual-channel operational amplifier chip, a first holding capacitor, and a second holding capacitor; The first terminal of the first holding capacitor is electrically connected to the first channel input terminal of the dual-channel operational amplifier chip; the first terminal of the second holding capacitor is electrically connected to the second channel input terminal of the dual-channel operational amplifier chip. The second terminals of both the first holding capacitor and the second holding capacitor are grounded; The first channel input terminal and the second channel input terminal of the dual-channel operational amplifier chip are used as the signal input terminals of the dual-channel hold module; the first channel input terminal of the dual-channel operational amplifier chip is electrically connected to the first channel output terminal of the single-pole double-throw switch, and the second channel input terminal of the dual-channel operational amplifier chip is electrically connected to the second channel output terminal of the single-pole double-throw switch; The first channel output terminal and the second channel output terminal of the dual-channel operational amplifier chip are used as the signal output terminals of the dual-channel hold module and are electrically connected to the signal sampling terminal of the processor.
5. The RSSI acquisition and protection circuit of the Combo optical module according to claim 4, characterized in that, The dual-channel operational amplifier chip contains two operational amplifiers.
6. The RSSI acquisition and protection circuit of the Combo optical module according to claim 4, characterized in that, The single-pole double-throw switch also includes a first channel switching terminal, a second channel switching terminal, a first channel discharge terminal, and a second channel discharge terminal. The first channel switching terminal and the second channel switching terminal of the single-pole double-throw switch are used as the charge and discharge controlled terminals of the dual-channel sampling module and are electrically connected to the charge and discharge control terminal of the processor. Both the first channel discharge terminal and the second channel discharge terminal of the single-pole double-throw switch are electrically connected to the processor. The processor is used to control the connection and disconnection between the first channel output terminal of the single-pole double-throw switch and the first channel input terminal and the first channel discharge terminal of the single-pole double-throw switch, respectively. And control the connection and disconnection between the second channel output terminal of the single-pole double-throw switch and the second channel input terminal and the second channel discharge terminal of the single-pole double-throw switch, respectively; When the first channel output terminal of the single-pole double-throw switch is connected to the first channel discharge terminal of the single-pole double-throw switch, the first holding capacitor is discharged; when the second channel output terminal of the single-pole double-throw switch is connected to the second channel discharge terminal of the single-pole double-throw switch, the second holding capacitor is discharged.
7. A monitoring system for a Combo optical module, characterized in that, The monitoring system includes: The RSSI data acquisition and protection circuit of the Combo optical module according to any one of claims 1-6; The processor of the RSSI acquisition and protection circuit of the Combo optical module is connected to the host computer for communication.
8. The monitoring system for the Combo optical module according to claim 7, characterized in that, The processor is an STM32 microcontroller.