A circuit compatible with two types of optical receiving components

Abstract

This utility model relates to the field of optical module circuit technology, specifically to a circuit compatible with two types of optical receiving components. The circuit includes: an MCU control circuit with a power sampling pin for acquiring received optical power; an APD boost circuit for providing high-voltage power to the APD ROSA, with a power monitoring pin for characterizing optical power; and a ROSA interface circuit for connecting to either a PIN ROSA or an APD ROSA, with a power signal pin. The purpose of this utility model is to provide a circuit compatible with two types of optical receiving components, reducing material inventory and circuit board manufacturing costs, thereby reducing overall costs.

Description

Technical Field

[0001] This utility model relates to the field of optical module circuit technology, specifically to a circuit compatible with two types of optical receiving components. Background Technology

[0002] Optical communication module receivers (ROSAs) are mainly divided into two types: PIN type and APD type. PIN ROSAs have a simple structure and are usually powered by a low voltage of 3.3V, making them suitable for medium- and short-distance transmission products such as those within 40 kilometers. APD ROSAs have avalanche gain effect and higher sensitivity, but require a high voltage of 25V or higher for power supply, and are typically used in long-distance transmission products with a range of 80 kilometers or more.

[0003] In existing technologies, due to the significant differences in power supply methods and peripheral circuits between these two ROSA systems, companies typically need to design different PCB circuit boards for each solution and manufacture and prepare materials separately. This model leads to increased PCB prototyping and manufacturing costs, a wide variety of materials, complex inventory management, and increased operating costs for the company. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a circuit that is compatible with two types of optical receiving components, which can reduce material preparation and circuit board manufacturing costs, thereby reducing costs.

[0005] This utility model is achieved through the following technical solution:

[0006] A circuit compatible with two types of optical receiver components, comprising:

[0007] The MCU control circuit is equipped with a power sampling pin for acquiring the received optical power.

[0008] The APD boost circuit is used to provide high voltage power to the APD ROSA. The APD boost circuit is provided with a power monitoring pin for characterizing optical power.

[0009] The ROSA interface circuit is used to connect a PIN ROSA or an APD ROSA, and the ROSA interface circuit is provided with a power signal pin.

[0010] The power sampling pin of the MCU control circuit is selectively connected to the power monitoring pin of the APD boost circuit or the power signal pin of the ROSA interface circuit through the same sampling signal line.

[0011] When the circuit is used in the PIN ROSA scheme, the power sampling pin of the MCU control circuit is connected to the power signal pin of the ROSA interface circuit through the sampling signal line;

[0012] When the circuit is used in the APD ROSA scheme, the connection between the power sampling pin of the MCU control circuit and the power signal pin of the ROSA interface circuit is broken, and the circuit is connected to the power monitoring pin of the APD boost circuit.

[0013] A resistor is provided between the power sampling pin of the MCU control circuit and the power signal pin of the ROSA interface circuit.

[0014] When the circuit is used in the PIN ROSA scheme, the resistor is turned on to make the line conduction complete; when the circuit is used in the APDROSA scheme, the resistor is turned off to make the line disconnected.

[0015] The resistor is an adjustable resistor.

[0016] The APD boost circuit is used to convert the 3.3V operating voltage of the optical module into a voltage higher than 25V required by the APD ROSA.

[0017] The MCU control circuit includes a chip U7 with model number MTK_CHIP_SILABS_EFM8LB12F16ES0_QFN32, whose power sampling pin is pin P1.5.

[0018] The APD boost circuit includes a chip U12 with model number MTK_CHIP_SGM41283_QFN16, whose power monitoring pin is pin 10;

[0019] The ROSA interface circuit includes a receiver component U10 with model number MTK_ROSA, whose power signal pin is pin 7.

[0020] The beneficial effects of this utility model are:

[0021] This invention discloses a circuit compatible with two types of optical receiver components, comprising an MCU control circuit, an APD boost circuit, and a ROSA interface circuit. When the circuit is used for the PIN ROSA scheme, the power sampling pin of the MCU control circuit is connected to the power signal pin of the ROSA interface circuit through the sampling signal line. When the circuit is used for the APD ROSA scheme, the connection between the power sampling pin of the MCU control circuit and the power signal pin of the ROSA interface circuit is disconnected, and the circuit is connected to the power monitoring pin of the APD boost circuit.

[0022] The circuit design described above enables seamless switching between PIN and APD ROSA, improving the flexibility and stability of the optical module, reducing production costs, and making it suitable for various application scenarios. Attached Figure Description

[0023] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the APD boost circuit in this utility model.

[0025] Figure 2 This is a schematic diagram of the ROSA interface circuit in this utility model.

[0026] Figure 3 This is a schematic diagram of the MCU control circuit in this utility model. Detailed Implementation

[0027] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0028] Example 1

[0029] like Figures 1 to 3 As shown, this embodiment discloses a circuit compatible with two types of optical receiver components, which includes:

[0030] The MCU control circuit is equipped with a power sampling pin for acquiring the received optical power.

[0031] The APD boost circuit is used to provide high voltage power to the APD ROSA. The APD boost circuit is provided with a power monitoring pin for characterizing optical power.

[0032] The ROSA interface circuit is used to connect a PIN ROSA or an APD ROSA, and the ROSA interface circuit is provided with a power signal pin.

[0033] The power sampling pin of the MCU control circuit is connected to the power monitoring pin of the APD boost circuit or the power signal pin of the ROSA interface circuit through the same sampling signal line.

[0034] When the circuit is used in the PIN ROSA scheme, the power sampling pin of the MCU control circuit is connected to the power signal pin of the ROSA interface circuit through the sampling signal line;

[0035] When the circuit is used in the APD ROSA scheme, the connection between the power sampling pin of the MCU control circuit and the power signal pin of the ROSA interface circuit is broken, and the circuit is connected to the power monitoring pin of the APD boost circuit.

[0036] Specifically, the MCU control circuit includes a chip U7 with model number MTK_CHIP_SILABS_EFM8LB12F16ES0_QFN32, whose power sampling pin is pin P1.5;

[0037] The APD boost circuit includes a chip U12 with model number MTK_CHIP_SGM41283_QFN16, whose power monitoring pin is pin 10;

[0038] The ROSA interface circuit includes a receiver component U10 with model number MTK_ROSA, whose power signal pin is pin 7.

[0039] Reference Figure 3 The P1.5 pin (pin 20) of the MCU control circuit is used as the optical power sampling pin and is connected to the signal line named ADC_RXPOWER1.

[0040] Reference Figure 1 The APD boost circuit is based on chip U12. Its function is to input a 3.3V voltage, boost it, and output the high voltage required to drive the APD ROSA. Its pin 10 is the power monitoring output pin, which is also connected to the ADC_RXPOWER1 signal line.

[0041] Reference Figure 2 Pin 7 of the ROSA interface of chip U10 is a power signal pin, which is connected to the ADC_RXPOWER1 signal line through a selectively mounted resistor R31.

[0042] Specifically, a resistor is provided between the power sampling pin of the MCU control circuit and the power signal pin of the ROSA interface circuit;

[0043] When the circuit is used in the PIN ROSA scheme, the resistor is turned on to make the line conduction complete; when the circuit is used in the APDROSA scheme, the resistor is turned off to make the line disconnected.

[0044] Preferably, the resistor is an adjustable resistor.

[0045] The APD boost circuit is used to convert the 3.3V operating voltage of the optical module into a voltage higher than 25V required by the APD ROSA.

[0046] Example 2

[0047] The circuit in this embodiment can be selectively connected to different signal sources according to production needs. By selectively mounting or omitting the APD boost circuit and a resistor acting as a switch during SMT placement, the circuit's connection method and operating mode can be changed.

[0048] When manufacturing the PINROSA module, only the APD boost circuit and its peripheral components need not be mounted during SMT placement; only the sampling circuit at R48 and C62 remains. A 0Ω resistor is installed at pin 7 (R31) of the ROSA component. The MCU control circuit samples the optical power signal at the receiving end through pin 20.

[0049] When manufacturing APDROSA modules, the APD boost circuit and its peripheral components need to be mounted on a surface. Figure 2 Resistor R31 from pin 7 of the ROSA is not installed, causing the ADC RXPOWER1 signal connected to pin 7 to be disconnected. The MCU control circuit samples from pin 10 of the SGM41283 APD chip circuit. The APD boost circuit converts the 3.3V voltage of the optical module into a high voltage to power the APD ROSA.

[0050] In summary, this utility model provides a circuit compatible with two types of optical receiver components, comprising an MCU control circuit, an APD boost circuit, and a ROSA interface circuit. When the circuit is used for the PIN ROSA scheme, the power sampling pin of the MCU control circuit is connected to the power signal pin of the ROSA interface circuit through the sampling signal line. When the circuit is used for the APD ROSA scheme, the connection between the power sampling pin of the MCU control circuit and the power signal pin of the ROSA interface circuit is broken, and the circuit is connected to the power monitoring pin of the APD boost circuit.

[0051] The circuit design described above enables seamless switching between PIN and APD ROSA, improving the flexibility and stability of the optical module, reducing production costs, and making it suitable for various application scenarios.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A circuit compatible with two types of optical receiver components, characterized in that, include: The MCU control circuit is equipped with a power sampling pin for acquiring the received optical power. The APD boost circuit is used to provide high voltage power to the APD ROSA. The APD boost circuit is provided with a power monitoring pin for characterizing optical power. The ROSA interface circuit is used to connect a PIN ROSA or an APD ROSA, and the ROSA interface circuit is provided with a power signal pin. The power sampling pin of the MCU control circuit is connected to the power monitoring pin of the APD boost circuit or the power signal pin of the ROSA interface circuit through the same sampling signal line. When the circuit is used in the PIN ROSA scheme, the power sampling pin of the MCU control circuit is connected to the power signal pin of the ROSA interface circuit through the sampling signal line; When the circuit is used in the APD ROSA scheme, the connection between the power sampling pin of the MCU control circuit and the power signal pin of the ROSA interface circuit is broken, and the circuit is connected to the power monitoring pin of the APD boost circuit.

2. The circuit compatible with two types of optical receiver components according to claim 1, characterized in that, A resistor is provided between the power sampling pin of the MCU control circuit and the power signal pin of the ROSA interface circuit. When the circuit is used in the PIN ROSA scheme, the resistor is turned on to make the line conduction complete; when the circuit is used in the APDROSA scheme, the resistor is turned off to make the line disconnected.

3. The circuit compatible with two types of optical receiver components according to claim 2, characterized in that, The resistor is an adjustable resistor.

4. A circuit compatible with two types of optical receiver components according to claim 1, characterized in that, The APD boost circuit is used to convert the 3.3V operating voltage of the optical module to a voltage higher than 25V required by the APD ROSA.

5. The circuit compatible with two types of optical receiver components according to claim 1, characterized in that, The MCU control circuit includes a chip U7 with model number MTK_CHIP_SILABS_EFM8LB12F16ES0_QFN32, whose power sampling pin is pin P1.

5. The APD boost circuit includes a chip U12 with model number MTK_CHIP_SGM41283_QFN16, whose power monitoring pin is pin 10; The ROSA interface circuit includes a receiver component U10 with model number MTK_ROSA, whose power signal pin is pin 7.

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