RSSI (Received Signal Strength Indicator) acquisition and protection circuit and monitoring system of Combo optical module
By designing the RSSI insurance circuit of Combo optical modules, including processors, dual-channel holding modules and dual-channel sampling modules, the problems of large space and high cost of components in the prior art are solved, and high-precision optical power monitoring and low deployment costs are achieved.
Patent Information
- Application Number
- CN202510314292.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2025-04-18
AI Technical Summary
The existing optical module monitoring circuits have problems such as large components taking up space and high cost when maintaining high precision.
A RSSI insurance circuit for Combo optical module is designed, including a processor, a dual-channel retaining module and a dual-channel sampling module. The charge and discharge control connection between the processor and the dual-channel sampling module is realized to realize the discharge and signal retaining and amplification of the dual-channel retaining module.
This design improves sampling accuracy, saves PCB layout space, and reduces deployment costs.
Smart Images
Figure CN119853797A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of optical monitoring integrated circuits, and in particular relates to an RSSI sampling and protection circuit and a monitoring system for a Combo optical module. Background Art
[0002] With the application of GPON (Gigabit-Capable PON, Gigabit Passive Optical Network) technology, 100M broadband has become popular in my country. In the transition from 100M to 1000M, XG(S)-PON modules are needed to be compatible with the previous generation of GPON and to achieve bandwidth improvement. Module manufacturers have launched Combo modules, which are XG(S)-PON and GPON in one module.
[0003] In optical communication systems, in order to ensure the reliability and stability of transmission and reception and 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, the power of the two receiving ends needs to be monitored in real time. Therefore, two RSSI (Received Signal Strength Indication) sampling and holding circuits are required inside the module to monitor the upstream optical power of the GPON end and the XG(S)PON end respectively.
[0005] However, existing monitoring circuits have defects such as large space occupied by components and relatively high cost while maintaining high accuracy. Summary of the invention
[0006] The object of the present invention is to provide an RSSI sampling and protection circuit and a monitoring system for a Combo optical module, so as to solve the problems that the existing monitoring circuit has the defects of large space occupied by components and relatively high cost while maintaining high precision.
[0007] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention provides an RSSI sampling and protection circuit for a Combo optical module, comprising: a processor, a dual-channel holding module and a dual-channel sampling module; The charge and discharge control end of the processor is electrically connected to the charge and discharge controlled end of the dual-channel sampling module; The signal output end of the dual-channel sampling module is electrically connected to the signal input end of the dual-channel holding module; the signal input end of the dual-channel sampling module is used to collect the two-way uplink optical power signals output by the Combo optical module; The signal output end of the dual-channel holding module is electrically connected to the signal sampling end of the processor, and the dual-channel holding module is used to respectively hold and amplify the two uplink optical power signals collected by the dual-channel sampling module.
[0008] Preferably, the dual-channel sampling module comprises: 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 end of the single-pole double-throw switch; the first end of the second resistor is electrically connected to the second channel input end of the single-pole double-throw switch; The second end of the first resistor and the second end of the second resistor are both grounded; The first end of the first resistor and the first end of the second resistor are used as signal input ends of the dual-channel sampling module; the single-pole double-throw switch includes a first channel output end and a second channel output end, and the first channel output end of the single-pole double-throw switch and the second channel output end of the single-pole double-throw switch are used as signal output ends of the dual-channel sampling module.
[0009] Preferably, the dual-channel sampling module further comprises: a first filter capacitor and a second filter capacitor; The first end of the first filter capacitor is electrically connected to the first end of the first resistor, and the first end of the second filter capacitor is electrically connected to the first end of the second resistor; the second end of the first filter capacitor and the second end of the second filter capacitor are both grounded.
[0010] Preferably, the dual-channel holding module comprises: a dual-channel operational amplifier chip, a first holding capacitor and a second holding capacitor; The first end of the first holding capacitor is electrically connected to the first channel input end of the dual-channel operational amplifier chip; the first end of the second holding capacitor is electrically connected to the second channel input end of the dual-channel operational amplifier chip; The second end of the first holding capacitor and the second end of the second holding capacitor are both grounded; The first channel input end of the dual-channel operational amplifier chip and the second channel input end of the dual-channel operational amplifier chip are used as signal input ends of the dual-channel holding module; the first channel input end of the dual-channel operational amplifier chip is electrically connected to the first channel output end of the single-pole double-throw switch, and the second channel input end of the dual-channel operational amplifier chip is electrically connected to the second channel output end of the single-pole double-throw switch; The first channel output end of the dual-channel operational amplifier chip and the second channel output end of the dual-channel operational amplifier chip are used as signal output ends of the dual-channel holding module and are electrically connected to the signal sampling end of the processor.
[0011] Preferably, the dual-channel operational amplifier chip includes two operational amplifiers.
[0012] Preferably, the single-pole double-throw switch further comprises a first channel switching end, a second channel switching end, a first channel discharging end, and a second channel discharging end, and the first channel switching end of the single-pole double-throw switch and the second channel switching end of the single-pole double-throw switch are used as the charge and discharge controlled ends of the dual-channel sampling module, and are electrically connected to the charge and discharge control end of the processor; The first channel discharge end of the single-pole double-throw switch and the second channel discharge end of the single-pole double-throw switch are both electrically connected to the processor; The processor is used to control the on / off between the first channel output end of the single-pole double-throw switch and the first channel input end of the single-pole double-throw switch and the first channel discharge end of the single-pole double-throw switch; and to control the on / off between the second channel output end of the single-pole double-throw switch and the second channel input end of the single-pole double-throw switch and the second channel discharge end of the single-pole double-throw switch; When the first channel output end of the single-pole double-throw switch is connected to the first channel discharge end of the single-pole double-throw switch, the first holding capacitor is discharged; when the second channel output end of the single-pole double-throw switch is connected to the second channel discharge end of the single-pole double-throw switch, the second holding capacitor is discharged.
[0013] In a second aspect, the present invention provides a monitoring system for a Combo optical module, the monitoring system comprising: RSSI sampling and protection circuit of Combo optical module; The host computer, the processor of the RSSI sampling and protection circuit of the Combo optical module is communicatively connected with the host computer.
[0014] Preferably, the processor is an STM32 single-chip microcomputer.
[0015] Beneficial effects: 1. The RSSI sampling and protection circuit of the present invention 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; 2. The charge and discharge control end of the processor of the present invention is electrically connected to the charge and discharge controlled end of the dual-channel sampling module, so that the dual-channel holding module can be discharged to release the uplink optical power signal held in the dual-channel holding module, thereby improving the sampling accuracy; 3. The monitoring system of the Combo optical module of the present invention has the advantage of low deployment cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings: Figure 1 It is a block diagram of an RSSI sampling and protection circuit of a Combo optical module provided in one embodiment of the present invention; Figure 2 is a schematic diagram of a dual-channel sampling module provided in one embodiment of the present invention; Figure 3 is a schematic diagram of a dual-channel holding module provided in one embodiment of the present invention; Figure 4 It is a connection diagram of the RSSI sampling and protection circuit of the Combo optical module provided by one embodiment of the present invention; Figure 5 is a block diagram of a monitoring system for a Combo optical module provided in one embodiment of the present invention; Description of reference numerals: 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 DESCRIPTION
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.
[0018] Embodiment 1 Figure 1 FIG. 1 is a block diagram of an RSSI sampling and protection circuit of a Combo optical module provided in one embodiment of the present invention. Figure 1 As shown, this embodiment provides an RSSI sampling and protection circuit for a Combo optical module, including: a processor, a dual-channel holding module and a dual-channel sampling module; in this embodiment, the processor can be a single-chip microcomputer of the STM32 series; The charge and discharge control end of the processor is electrically connected to the charge and discharge controlled end of the dual-channel sampling module; The signal output end of the dual-channel sampling module is electrically connected to the signal input end of the dual-channel holding module; the signal input end of the dual-channel sampling module is used to collect two uplink optical power signals output by the Combo optical module; that is, the signal input end of the dual-channel sampling module has two channels, one of which is connected to the GPON end of the Combo module, and the other is connected to the XG(S)PON end of the Combo module, and the optical signal is output as a current signal for the dual-channel sampling module to collect signals; The signal output end of the dual-channel holding module is electrically connected to the signal sampling end of the processor, and the dual-channel holding module is used to respectively hold and amplify the two uplink optical power signals collected by the dual-channel sampling module.
[0019] The RSSI sampling and holding circuit of the present invention mainly comprises a processor, a dual-channel holding module and a dual-channel sampling module, has high integration, saves PCB layout space, and can reduce costs.
[0020] 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; The first end of the first resistor R1 is electrically connected to the first channel input end of the single-pole double-throw switch U1; the first end of the second resistor R2 is electrically connected to the second channel input end of the single-pole double-throw switch U1; The second end of the first resistor R1 and the second end of the second resistor R2 are both grounded; The first end of the first resistor R1 and the first end of the second resistor R2 are used as signal input ends of the dual-channel sampling module; the single-pole double-throw switch U1 includes a first channel output end and a second channel output end, and the first channel output end of the single-pole double-throw switch U1 and the second channel output end of the single-pole double-throw switch U1 are used as signal output ends of the dual-channel sampling module.
[0021] In this embodiment, the single-pole double-throw switch U1 is a two-channel, low-loss, fast-opening and fast-closing type, 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 end of the single-pole double-throw switch U1, the NO2 pin is the second channel input end of the single-pole double-throw switch U1, COM1 is the first channel output end of the single-pole double-throw switch U1, and COM2 is the second channel output end of the single-pole double-throw switch U1.
[0022] 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 optical power signals of the two paths are monitored.
[0023] As a further optimization of this embodiment, Figure 2 As shown, the dual-channel sampling module further includes: a first filter capacitor C1 and a second filter capacitor C2; The first end of the first filter capacitor C1 is electrically connected to the first end of the first resistor R1, and the first end of the second filter capacitor C2 is electrically connected to the first end of the second resistor R2; the second end of the first filter capacitor C1 and the second end of the second filter capacitor C2 are both grounded.
[0024] 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 as to make the voltage signal more stable, improve the sampling accuracy, and thus improve the accuracy of optical power monitoring.
[0025] As a further optimization of this embodiment, 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; the dual-channel operational amplifier chip U2 of this embodiment is a dual-channel, high-precision, low-noise operational amplifier, and the dual-channel operational amplifier chip U2 includes two operational amplifiers, and the two operational amplifiers respectively amplify the voltage signals of the two channels; The first end of the first holding capacitor C3 is electrically connected to the first channel input end of the dual-channel operational amplifier chip U2; the first end of the second holding capacitor C4 is electrically connected to the second channel input end of the dual-channel operational amplifier chip U2; The second end of the first holding capacitor C3 and the second end of the second holding capacitor C4 are both grounded; The first channel input end of the dual-channel operational amplifier chip U2 and the second channel input end of the dual-channel operational amplifier chip U2 are used as signal input ends of the dual-channel holding module; the first channel input end of the dual-channel operational amplifier chip U2 is electrically connected to the first channel output end of the single-pole double-throw switch U1, and the second channel input end of the dual-channel operational amplifier chip U2 is electrically connected to the second channel output end of the single-pole double-throw switch U1; The first channel output end of the dual-channel operational amplifier chip U2 and the second channel output end of the dual-channel operational amplifier chip U2 are used as signal output ends of the dual-channel holding module and are electrically connected to the signal sampling end of the processor.
[0026] In this embodiment, the voltage signal output from the first channel output end of the single-pole double-throw switch U1 will charge the first holding capacitor C3. When stable, 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 maintain the voltage signal, that is, maintain the optical power signal. At this time, the level of the voltage signal reflects the size 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.
[0027] As a further optimization of this embodiment, Figure 2 and Figure 4 As shown, in Figure 4 In the embodiment, U4 is a 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 second channel switching end is the IN1 pin in Figure 2 The IN2 pin in the first channel discharge terminal is Figure 2 The NC1 pin in the second channel discharge terminal is Figure 2 NC2 pin in.
[0028] The first channel switching end of the single-pole double-throw switch U1 and the second channel switching end of the single-pole double-throw switch U1 are used as the charge and discharge controlled ends of the dual-channel sampling module, and are electrically connected to the charge and discharge control end of the processor; The first channel discharge end of the single-pole double-throw switch U1 and the second channel discharge end of the single-pole double-throw switch U1 are both electrically connected to the processor; The processor is used to control the on / off between the first channel output end of the single-pole double-throw switch U1 and the first channel input end of the single-pole double-throw switch U1 and the first channel discharge end of the single-pole double-throw switch U1; and to control the on / off between the second channel output end of the single-pole double-throw switch U1 and the second channel input end of the single-pole double-throw switch U1 and the second channel discharge end of the single-pole double-throw switch U1; When the first channel output end of the single-pole double-throw switch U1 is connected to the first channel discharge end of the single-pole double-throw switch U1, the first holding capacitor C3 is discharged; when the second channel output end of the single-pole double-throw switch U1 is connected to the second channel discharge end of the single-pole double-throw switch U1, the second holding capacitor C4 is discharged.
[0029] During the sampling process, taking the first channel as an example, the processor will output a TRIG_A signal. When the TRIG_A signal is at a high level, 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 to charge the first holding capacitor C3 of the dual-channel holding module; when the TRIG_A signal is at a low level, 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 fully discharged; after discharging, the next sampling can be performed. This method can ensure that the state after each sampling is completed is consistent, thereby improving the sampling accuracy.
[0030] 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.
[0031] Embodiment 2 Figure 5 FIG. 1 is a block diagram of a monitoring system for a Combo optical module provided by an embodiment of the present invention. Figure 5 As shown, this embodiment provides a monitoring system for a Combo optical module, and the monitoring system includes: The RSSI sampling and protection circuit of the Combo optical module in the first embodiment; The host computer, the processor of the RSSI sampling and protection circuit of the Combo optical module is communicatively connected with the host computer.
[0032] In this embodiment, after the processor collects the voltage signals of the two channels, it reports them to the host computer, and the host computer displays the voltage signals of the two channels to achieve real-time monitoring of the upstream optical power of the GPON end and the XG(S)PON end of the Combo module.
[0033] Therefore, the monitoring system of the Combo optical module of the present invention has the advantage of low deployment cost.
[0034] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.
Claims
1. An RSSI sampling and protection circuit for a Combo optical module, characterized in that: include: processor, dual-channel holding module and dual-channel sampling module; The charge and discharge control end of the processor is electrically connected to the charge and discharge controlled end of the dual-channel sampling module; The signal output end of the dual-channel sampling module is electrically connected to the signal input end of the dual-channel holding module; the signal input end of the dual-channel sampling module is used to collect the two-way uplink optical power signals output by the Combo optical module; The signal output end of the dual-channel holding module is electrically connected to the signal sampling end of the processor, and the dual-channel holding module is used to respectively hold and amplify the two uplink optical power signals collected by the dual-channel sampling module.
2. The RSSI sampling 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 end of the single-pole double-throw switch; the first end of the second resistor is electrically connected to the second channel input end of the single-pole double-throw switch; The second end of the first resistor and the second end of the second resistor are both grounded; The first end of the first resistor and the first end of the second resistor are used as signal input ends of the dual-channel sampling module; the single-pole double-throw switch includes a first channel output end and a second channel output end, and the first channel output end of the single-pole double-throw switch and the second channel output end of the single-pole double-throw switch are used as signal output ends of the dual-channel sampling module.
3. The RSSI sampling 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 end of the first filter capacitor is electrically connected to the first end of the first resistor, and the first end of the second filter capacitor is electrically connected to the first end of the second resistor; the second end of the first filter capacitor and the second end of the second filter capacitor are both grounded.
4. The RSSI sampling 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 end of the first holding capacitor is electrically connected to the first channel input end of the dual-channel operational amplifier chip; the first end of the second holding capacitor is electrically connected to the second channel input end of the dual-channel operational amplifier chip; The second end of the first holding capacitor and the second end of the second holding capacitor are both grounded; The first channel input end of the dual-channel operational amplifier chip and the second channel input end of the dual-channel operational amplifier chip are used as signal input ends of the dual-channel holding module; the first channel input end of the dual-channel operational amplifier chip is electrically connected to the first channel output end of the single-pole double-throw switch, and the second channel input end of the dual-channel operational amplifier chip is electrically connected to the second channel output end of the single-pole double-throw switch; The first channel output end of the dual-channel operational amplifier chip and the second channel output end of the dual-channel operational amplifier chip are used as signal output ends of the dual-channel holding module and are electrically connected to the signal sampling end of the processor.
5. The RSSI sampling and protection circuit of the Combo optical module according to claim 4, characterized in that: The dual-channel operational amplifier chip includes two operational amplifiers.
6. The RSSI sampling and protection circuit of the Combo optical module according to claim 4, characterized in that: The single-pole double-throw switch further comprises a first channel switching end, a second channel switching end, a first channel discharging end and a second channel discharging end, and the first channel switching end of the single-pole double-throw switch and the second channel switching end of the single-pole double-throw switch are used as the charge and discharge controlled ends of the dual-channel sampling module, and are electrically connected to the charge and discharge control end of the processor; The first channel discharge end of the single-pole double-throw switch and the second channel discharge end of the single-pole double-throw switch are both electrically connected to the processor; The processor is used to control the on / off between the first channel output end of the single-pole double-throw switch and the first channel input end of the single-pole double-throw switch and the first channel discharge end of the single-pole double-throw switch; and controlling the on-off between the second channel output end of the single-pole double-throw switch and the second channel input end of the single-pole double-throw switch and the second channel discharge end of the single-pole double-throw switch; When the first channel output end of the single-pole double-throw switch is connected to the first channel discharge end of the single-pole double-throw switch, the first holding capacitor is discharged; when the second channel output end of the single-pole double-throw switch is connected to the second channel discharge end 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 comprises: The RSSI sampling and protection circuit of the Combo optical module according to any one of claims 1 to 6; The host computer, the processor of the RSSI sampling and protection circuit of the Combo optical module is communicatively connected with the host computer.
8. The monitoring system of the Combo optical module according to claim 7, characterized in that: The processor is an STM32 single-chip microcomputer.