Optical receiving device, optical component and signal amplifying device

Abstract

The present application provides an optical receiving device, an optical component, and a signal amplifying device that can be used in fiber-to-the-room (FTTR) scenarios. The signal amplifying device in the optical receiving device can be connected to two power supplies: a module with a higher rated operating voltage (e.g., the first module) in the signal amplifying device is connected to the higher-voltage power supply (e.g., the first power supply), and a module with a lower rated operating voltage (e.g., the second module) in the signal amplifying device is connected to the lower-voltage power supply (e.g., the second power supply). Compared to conventional solutions in which each module in the entire signal amplifying device is connected to a higher-voltage power supply (e.g., the first power supply), this embodiment reduces the power supply voltage provided to the second module, and the second module can operate normally at a lower voltage. This reduces energy consumption of the signal amplifying device, and thus reduces energy consumption of the optical receiving device.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of optical communications, and in particular to an optical receiving device, an optical component, and a signal amplifying device. Background Art

[0002] In a passive optical network (PON) system, optical communication devices communicate via the exchange of optical signals. Each optical communication device is equipped with optical components (e.g., bidirectional optical sub-assemblies (BOSAs) and tri-direction optical sub-assemblies (TRI-DI OSAs)) for transmitting and receiving optical signals and for optical-to-electrical conversion. For example, bidirectional optical sub-assemblies primarily consist of a transmitting optical sub-assembly (TOSA) and a receiving optical sub-assembly (ROSA). The TOSA converts electrical signals into optical signals and transmits them into the optical fiber network for transmission. The ROSA receives optical signals and converts them back into electrical signals.

[0003] Generally, an optical receiving device includes a signal amplifying device (eg, a trans-impedance amplifier (TIA)). The signal amplifying device is generally connected to a DC power supply for supplying power to various functional modules in the signal amplifying device.

[0004] However, with the development of optical communications, the system speed continues to increase, resulting in a significant increase in the power consumption of optical components. Therefore, how to reduce the power consumption of optical receiving devices has become an urgent problem to be solved in the industry. Summary of the Invention

[0005] The present application provides an optical receiving device, an optical component, and a signal amplifying device, which are used to reduce the power consumption of the optical receiving device and thereby reduce the power consumption of the optical component.

[0006] In a first aspect, the present application provides an optical receiving device that can be used in a bidirectional optical component or a tridirectional optical component in a fiber to the room (FTTR) scenario. The optical receiving device includes a photoelectric detection device and a signal amplification device. The photoelectric detection device is used to convert the received optical signal into a current signal; the signal amplification device is used to convert the current signal into a voltage signal and amplify the voltage signal to obtain a target voltage signal. The signal amplification device is connected to a first power supply and a second power supply, the first power supply is used to supply power to the first module in the signal amplification device, and the second power supply is used to supply power to the second module in the signal amplification device, the rated operating voltage of the first module is greater than the rated operating voltage of the second module, and the voltage of the second power supply is less than the voltage of the first power supply.

[0007] In this embodiment, the signal amplification device in the optical receiving device is capable of connecting to two power supplies. The module with a higher rated operating voltage in the signal amplification device (e.g., the first module) is connected to the higher voltage power supply (e.g., the first power supply), while the module with a lower rated operating voltage in the signal amplification device (e.g., the second module) is connected to the lower voltage power supply (e.g., the second power supply). Compared to conventional solutions in which each module in the entire signal amplification device is connected to a higher voltage power supply (e.g., the first power supply), this embodiment reduces the power supply voltage provided to the second module. Furthermore, the second module can operate normally at a lower voltage, thereby saving energy consumption in the signal amplification device and, in turn, reducing energy consumption in the optical receiving device. Because reduced energy consumption is accompanied by reduced heat generation, the optical receiving device is more easily able to dissipate heat, which helps reduce the difficulty of heat dissipation in the optical receiving device.

[0008] In one possible embodiment, the optical receiving device also includes a first power pin and a second power pin; the first power pin is connected to the first power interface of the signal amplifying device, the first power pin is used to connect to the first power supply, and the first power interface is used to connect to the first module; the second power pin is connected to the second power interface of the signal amplifying device, the second power pin is used to connect to the second power supply, and the second power interface is used to connect to the second module.

[0009] In this embodiment, the optical receiving device adds a pin (i.e., the pin for the second power supply) and the signal amplifying device adds a power interface (i.e., the second power interface), thereby enabling the connection of the added power supply (i.e., the second power supply) to the second module within the signal amplifying device. This solution is simple and easy to implement.

[0010] In one possible embodiment, the optical receiving device also includes a first power pin and a control pin; the first power pin is connected to the first power interface of the signal amplifying device, the first power pin is used to connect to the first power supply, and the first power interface is used to connect to the first module; the control pin is connected to the control interface of the signal amplifying device, and the control pin is used to connect to the second power supply.

[0011] In this embodiment, the control pin is reused as a pin for connecting to the second power supply, without increasing the number of pins of the optical receiver, thereby maintaining the original packaging form of the optical receiver. Since fewer pins in an optical receiver facilitates miniaturization, this embodiment not only saves energy but also facilitates miniaturization of the optical receiver.

[0012] In one possible embodiment, the voltage of the second power supply varies within a first preset range; the signal amplification device also includes a voltage stabilizing module and a control module, the voltage stabilizing module is connected to the second power supply through a control interface, and the control module is connected to the second power supply through a control interface; the voltage stabilizing module is used to process the output voltage of the second power supply into a first voltage signal of a fixed size, and the first voltage signal is used to power the second module; the control module is used to determine a second voltage signal based on the output voltage of the second power supply, and the second voltage signal is used to adjust the output swing of the target voltage signal, and the voltage of the second voltage signal varies within a second preset range, and the second preset range is different from the first preset range.

[0013] In a possible embodiment, the optical receiving device also includes a first power pin, a first output pin, and a second output pin; the first power pin is connected to the first power interface of the signal amplifying device, the first power pin is used to connect to the first power supply, and the first power interface is used to connect to the first module; the first output pin is connected to the first output interface of the signal amplifying device, the first output pin is connected to the second power supply through the first inductor, the first output pin is also connected to the first capacitor, and the first capacitor is connected in parallel with the first inductor; the second output pin is connected to the second output interface of the signal amplifying device, the second output pin is connected to the second power supply through the second inductor, the second output pin is also connected to the second capacitor, and the second capacitor is connected in parallel with the second inductor.

[0014] In this embodiment, the multiplexed output pins serve as pins for connecting to the second power supply, without increasing the number of pins in the optical receiver, thereby maintaining the original packaging form of the optical receiver. Since fewer pins in an optical receiver facilitates miniaturization, this embodiment not only saves energy but also contributes to the miniaturization of the optical receiver.

[0015] In one possible embodiment, the optical receiving device also includes a first output pin and a second output pin; the first output pin is connected to the first output interface of the signal amplifying device, and the second output pin is connected to the second output interface of the signal amplifying device, and the first output interface and the second output interface are used to output the target voltage signal.

[0016] In a possible implementation, the optical receiving device further includes a control pin connected to a control interface of the signal amplifying device. The control interface is used to receive a control signal, and the control signal is used to adjust the output swing of the target voltage signal.

[0017] In a possible implementation, the light receiving device further includes a third power pin, which is connected to the photodetection device and is used to supply power to the photodetection device.

[0018] In a possible implementation manner, the optical receiving device further includes a ground pin.

[0019] In a possible implementation, the optical receiving device adopts coaxial packaging.

[0020] In a possible implementation, the second module includes: a signal detection module and / or a gain control module.

[0021] In a second aspect, the present application provides an optical component, which includes an optical receiving device introduced in any one embodiment of the first aspect, and the optical receiving device is used to convert a received optical signal into an electrical signal.

[0022] In a possible implementation, the optical component further includes an optical transmitting device, which is configured to convert an electrical signal into an optical signal.

[0023] In a possible implementation, the optical component may be a bidirectional optical component or a tridirectional optical component.

[0024] In a third aspect, the present application provides a signal amplification device comprising a first module and a second module, wherein the rated operating voltage of the first module is greater than the rated operating voltage of the second module; the first module is configured to receive a current signal, convert the current signal into a voltage signal, and amplify the voltage signal to obtain a target voltage signal; and the second module is configured to assist the first module in outputting the target voltage signal. The first module is powered by a first power supply, and the second module is powered by a second power supply, wherein the voltage of the second power supply is lower than that of the first power supply.

[0025] In a possible implementation, the second module includes: a signal detection module and / or a gain control module.

[0026] In a possible implementation, the signal amplifying device includes a first power interface; the first power interface is used to connect the first module and the first power supply.

[0027] In a possible implementation, the signal amplifying device further includes a second power interface; the second power interface is used to connect the second module and the second power supply.

[0028] In a possible implementation, the signal amplifying device further includes a control interface; the control interface is used to connect to a second power supply, and the voltage of the second power supply varies within a first preset range.

[0029] In one possible embodiment, the signal amplification device also includes a voltage stabilizing module and a control module, the voltage stabilizing module is connected to the second power supply through a control interface, and the control module is connected to the second power supply through a control interface; the voltage stabilizing module is used to process the voltage of the second power supply into a first voltage signal of a fixed size, and the first voltage signal is used to power the second module; the control module is used to determine the second voltage signal based on the output voltage of the second power supply, and the second voltage signal is used to adjust the output swing of the target voltage signal, and the voltage size of the second voltage signal varies within a second preset range, and the second preset range is different from the first preset range.

[0030] In a possible implementation, the signal amplifying device further includes a first output interface and a second output interface; the first output interface and the second output interface are configured to be connected to a second power supply via an inductor.

[0031] In a possible implementation, the signal amplifying device further includes an input interface, a first output interface, and a second output interface. The input interface is used to receive a current signal. The first output interface and the second output interface are used to output a target voltage signal, which is an AC voltage signal.

[0032] In a possible implementation, the signal amplifying device further includes a control interface, where the control interface is used to receive a control signal, where the control signal is used to adjust the output swing of the target voltage signal.

[0033] In a fourth aspect, the present application provides an optical module, which includes the optical receiving device introduced in any one embodiment of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1A FIG. 1 is an example diagram of a light receiving device in conventional technology;

[0035] Figure 1B FIG. 1 is another example diagram of a light receiving device in conventional technology;

[0036] Figure 2 An example diagram of a light receiving device provided in this application;

[0037] Figure 3A An example diagram of a signal amplification device provided in this application;

[0038] Figure 3B Another example diagram of the signal amplification device provided by this application;

[0039] Figure 3C Provided for this application Figure 3A An example diagram of an optical receiving device corresponding to the signal amplifying device shown;

[0040] Figure 4A Another exemplary diagram of the signal amplification device provided in this application;

[0041] Figure 4B Provided for this application Figure 4A An example diagram of an optical receiving device corresponding to the signal amplifying device shown;

[0042] Figure 5A Another exemplary diagram of the signal amplification device provided in this application;

[0043] Figure 5B Another example diagram of the signal amplification device provided by this application;

[0044] Figure 5C Provided for this application Figure 5A An example diagram of an optical receiving device corresponding to the signal amplifying device shown. DETAILED DESCRIPTION

[0045] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0046] In the various embodiments of the present application, unless otherwise specified or there is a logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0047] The terms "first," "second," "third," "fourth," and so forth (if any) in the specification and claims of this application and in the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a particular order or sequential sequence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that shown or described herein. In addition, the terms "including" and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, product, or apparatus.

[0048] It should be understood that the term "and / or" in this document is merely a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be single or multiple. In addition, the character " / " in this document generally indicates that the associated objects before and after are in an "or" relationship. In addition, "at least one of the following" or similar expressions in this document is used to represent any combination of the listed items; for example, at least one of A, B, and / or C can represent the following six situations: A exists alone, B exists alone, C exists alone, A and B exist at the same time, B and C exist at the same time, A and C exist at the same time, and A, B, and C exist at the same time, where A, B, and C can be single or multiple.

[0049] It should also be understood that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions, and that an embodiment or design described as "exemplary" or "for example" should not be construed as being more preferred or advantageous over other embodiments or designs. The use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner to facilitate understanding.

[0050] The optical receiving device and optical components in this embodiment can be applied to an optical fiber network, which includes an optical line terminal (OLT), an optical distribution network (ODN) and an optical network unit (ONU) (or optical network terminal (ONT)). Among them, the OLT is generally connected to the ONU (or ONT) through the ODN. The ODN includes a network composed of optical components such as optical fibers, optical distribution frames (ODF), optical splitters (also known as splitters) and combiners. In the downstream direction, the OLT broadcasts the downstream optical signal through the optical component, and distributes the downstream optical signal to each ONU (or ONT) through the ODN. In the upstream direction, the time division multiple access (TDMA) method is adopted, and each ONU (or ONT) sends the upstream optical signal in its respective upstream time slot allocated by the OLT through the optical component.

[0051] For example, the optical receiving device and optical assembly in this embodiment can be used in a fiber-to-the-room (FTTR) scenario. An FTTR scenario includes a main device and a sub-device. The optical receiving device and optical assembly provided in this embodiment can be located in the main device and / or the sub-device, facilitating energy conservation for both the main device and the sub-device. Optionally, the main device can be a main FTTR unit (MFU), a main gateway, or a main fiber unit (Main Fiber Unit), and the sub-device can be a sub FTTR unit (SFU), a slave gateway, or a sub-fiber unit (Sub Fiber Unit). In one example, the sub-device can be directly connected to a terminal device in the user's home. This terminal device can be a mobile phone or tablet connected to the aforementioned router via wireless fidelity (Wi-Fi), or an IoT device (e.g., an indoor temperature control device, an indoor monitoring device, or other artificial intelligence devices). In another example, the sub-device is connected to the user's home terminal device through another network (such as Ethernet). The sub-device is an optical modem provided by the operator, which is then connected to an indoor router or other device. With the development of optical communication technology, the optical receiving device may also be applied to other optical communication scenarios, which are not limited in this embodiment.

[0052] To facilitate understanding, the following first introduces the optical receiving device in traditional technology:

[0053] Figure 1A FIG. 1 is an example diagram of a light receiving device in conventional technology. Figure 1A As shown, the light receiving device mainly includes a photodetection device and a signal amplification device. The photodetection device is used to detect the light signal and generate a current signal based on the detected light signal. The signal amplification device receives the current signal from the photodetection device, converts the current signal into a voltage signal, and then amplifies the voltage signal before outputting it.

[0054] Figure 1B FIG. 4 is another example diagram of a light receiving device in conventional technology. Figure 1B The following is an example of an optical receiving device being a ROSA, a photodetection device being an avalanche photodiode (APD), and a signal amplification device being a trans-impedance amplifier (TIA). Figure 1B As shown, the APD and TIA included in the ROSA are packaged in a coaxial package (Transistor Outline, TO-Can). The coaxial package contains multiple pins, and different pins have different functions. Generally, the coaxial package ROSA includes power pins (for example, Figure 1B Vcc pin and Vapd pin shown) and signal output pins (for example, Figure 1B TIAout+ and TIAout- shown in the figure). For example, Figure 1B In the example shown, the Vcc pin is connected to the Vcc interface of the TIA to provide power to the TIA. The Vapd pin is used to provide power to the APD, which inputs a current signal determined based on the optical signal into the TIA through the TIAin interface. The TIAout+ pin and TIAout- pin are respectively connected to the two output interfaces of the TIA to output the voltage signal generated by the TIA (e.g., a differential voltage signal). Optionally, some coaxial packaged ROSAs also include control pins (e.g., Figure 1B The adjustable output amplitude (VOA) pin shown in the figure is used to adjust the output voltage swing of the TIA. In addition, the coaxial packaged ROSA also includes a ground pin (GND), which refers to the zero potential reference point in the circuit.

[0055] like Figure 1A and Figure 1BAs shown, a traditional optical receiver uses a single power supply to power the signal amplification device. For example, a TIA has only one power supply interface for connecting to the ROSA's power pin (e.g., the Vcc pin). This means that a single power supply powers all modules within the TIA, and all modules within the TIA use the same voltage signal. However, some modules within the TIA only support higher rated operating voltages, while others can operate at both higher and lower voltages. For example, a TIA is a multi-stage amplifier. To meet the output signal swing, bandwidth, and noise requirements of the TIA, the power supply to the amplifier modules within the TIA is generally required to be no less than 3.3V. However, some auxiliary control modules within the TIA (e.g., the direct current (DC) bias module, the automatic gain control (AGC) module, and the peak-to-peak (Peak-Peak) detection module) can be powered by lower voltages.

[0056] This shows that the traditional solution of using only one power pin to power the TIA results in some additional power consumption (i.e., the additional power consumption of the auxiliary function module due to the use of a higher voltage), which is not conducive to energy saving of the optical receiving device (e.g., ROSA).

[0057] In this regard, the present application proposes an optical receiving device, an optical component, and a signal amplifying device, which supply power to different modules inside the signal amplifying device (e.g., TIA) through two power supplies with different voltages, thereby reducing the power consumption of the optical receiving device and further reducing the power consumption of the optical component.

[0058] The following will be combined Figure 2 The main structure of the optical receiving device provided in this application is introduced:

[0059] like Figure 2 As shown, the optical receiving device provided in this application includes a signal amplifying device 01 and a photoelectric detection device 02. The photoelectric detection device 02 is used to detect the optical signal and convert the received optical signal into a current signal. The signal amplifying device 01 is used to convert the current signal into a voltage signal, amplify the voltage signal, and output a target voltage signal.

[0060] Different from the traditional signal amplification device using a single power supply, Figure 2The illustrated signal amplifying device 01 is simultaneously connected to two power supplies of different voltages, meaning that two voltages of different magnitudes simultaneously supply power to the signal amplifying device 01. Specifically, the signal amplifying device 01 includes a first module 011 and a second module 012, wherein the rated operating voltage of the first module 011 is greater than the rated operating voltage of the second module 012. Furthermore, the two power supplies connected to the signal amplifying device 01 are a first power supply 031 and a second power supply 032, respectively, with the voltage of the second power supply 032 being lower than that of the first power supply 031. The first module 011 in the signal amplifying device 01 is connected to the first power supply 031, meaning that the first power supply 031 is used to supply power to the first module 011 in the signal amplifying device 01. The second module 012 in the signal amplifying device 01 is connected to the second power supply 032, meaning that the second power supply 032 is used to supply power to the second module 012 in the signal amplifying device 01.

[0061] In this embodiment, the signal amplifying device 01 in the optical receiving device can be connected to two power supplies. The module with a higher rated operating voltage in the signal amplifying device 01 (e.g., the first module 011) is connected to the higher-voltage power supply (e.g., the first power supply 031), while the module with a lower rated operating voltage in the signal amplifying device 01 (e.g., the second module 012) is connected to the lower-voltage power supply (e.g., the second power supply 032). Compared to conventional solutions in which each module in the entire signal amplifying device 01 (e.g., the first module 011 and the second module 012) is connected to the higher-voltage power supply (e.g., the first power supply 031), this embodiment reduces the power supply voltage provided to the second module 012. Furthermore, the second module 012 can operate normally at a lower voltage, thereby reducing energy consumption in the signal amplifying device 01 and, in turn, the energy consumption of the optical receiving device. Since reduced energy consumption is accompanied by reduced heat generation, the optical receiving device can dissipate heat more easily, thereby reducing the heat dissipation difficulty of the optical receiving device.

[0062] For example, let's take a TIA as an example. A TIA is a multi-stage amplifier device whose output swing is generally required to be greater than 450mV. Therefore, the TIA's power supply is generally required to be no less than 3.3V. Therefore, the voltage of the first power supply 031 connected to the first module 011 can be 3.3V. The voltage of the second power supply 032 connected to the second module 012 can be less than 3.3V. For example, the voltage of the second power supply 032 can be 1.8V, 1.6V, or 2.2V. It should be understood that different second modules can use second power supplies with different voltages. For example, second module #1 can use a 1.6V second power supply, second module #2 can use a 1.8V second power supply, and second module #3 can use a 2.2V second power supply. The specific size of the second power supply used by the second module can be adjusted based on actual circuit requirements while being smaller than the first power supply. This embodiment does not limit the voltage of the second power supply. Since a 1.8V power supply is commonly provided on single boards, the subsequent embodiments will primarily use a 1.8V second power supply as an example.

[0063] In conventional technology, a TIA amplifier has only one power supply (e.g., a 3.3V power supply), and both the first and second modules in the TIA operate at 3.3V. However, the second module can also operate at a lower voltage (e.g., 1.8V), making conventional solutions less energy-efficient. In contrast, the solution provided in the embodiments of the present application enables the TIA to connect to two power supplies of different voltages, with the higher voltage (e.g., 3.3V) powering the first module and the lower voltage (e.g., 1.8V) powering the second module. This helps reduce energy consumption in the signal amplification device, and in turn, in the optical receiving device.

[0064] In a possible implementation, the photodetection device 02 may be a photodiode (PD) or an avalanche photodiode (APD), which is not limited in this embodiment. Compared to a PD, an APD has a signal amplification function.

[0065] In one possible implementation, Figure 3AAs shown, the first module 011 in the signal amplifying device 01 can be an amplifying module, that is, a core component in the signal amplifying device 01 that realizes the conversion between a weak current signal and an amplified voltage signal. The core function is to convert and amplify the input weak current signal into a voltage signal. Optionally, the amplifying module is usually composed of components such as an operational amplifier, and can set the transimpedance gain through feedback resistors, etc., thereby determining the proportional relationship between the output voltage and the input current. Since the amplifying module has high requirements for parameters such as output swing, bandwidth, and noise, the amplifying module generally uses a higher rated operating voltage. For example, the power supply to the amplifying module is the first power supply 031, and the voltage of the first power supply 031 can be 3.3V.

[0066] Optionally, the first module 011 further includes a DC bias module connected to the amplification module (for example, Figure 3A The DC bias module 1 shown is used to provide a DC bias point (also called a DC operating point) to the amplifier module to ensure that the device (for example, the amplifier module) operates in a linear region to avoid signal distortion.

[0067] Optionally, the first module 011 further includes a voltage stabilizing module corresponding to the amplifying module (for example, Figure 3A The voltage regulator module 1 shown is used to stabilize the voltage input to the amplifier module. For example, the voltage regulator module can be a low-dropout regulator (LDO), a linear voltage regulator component that stably converts an input voltage into a lower output voltage. Placing the voltage regulator module 1 between the DC bias module 1 and the first power supply ensures that the DC bias module 1 receives a stable DC power supply, which helps improve the stability of the DC bias point and, in turn, ensures the stability of the amplifier module.

[0068] In a possible implementation, the second module 012 in the signal amplifying device 01 includes a gain control module and / or a signal detection module. The gain control module and the signal detection module can operate at a higher voltage (e.g., 3.3V) or a lower voltage (e.g., 1.8V, 1.6V, 2.2V, etc.). Figure 3AAs shown, the gain control module is connected to the amplification module and is used to instruct the amplification module to adjust the gain of the output voltage. For example, the gain control module can determine how to adjust the gain of the amplification module according to the amplitude or strength of the input signal, so that the signal amplitude of the output voltage of the amplification module is kept within a reasonable range (for example, to prevent the amplification module from being overloaded or noise amplified). Optionally, the gain control module can be an automatic gain control (AGC) module, or a module including a variable gain amplifier (VGA), a comparator, a controller and other feedback loops. This embodiment does not limit the specific implementation form of the gain control module. Figure 3A As shown, the signal detection module is used to detect the output signal of the amplification module. For example, it detects the amplitude (e.g., maximum, minimum, average, etc.), noise level, signal integrity, etc. of the voltage signal output by the amplification module. The signal detection module can provide the detection result (e.g., signal amplitude) to the gain control module to facilitate the gain control module in determining whether to adjust the gain and how to adjust the gain. Optionally, the signal detection module can be a peak detection module (e.g., a peak-to-peak detection module), which can detect the difference between the maximum and minimum values ​​of the input signal (peak-to-peak value) for evaluating the signal amplitude, noise level, or determining signal integrity.

[0069] Optionally, the second module 012 further includes a DC bias module (eg, Figure 3A The DC bias module 2 shown in FIG2 is used to provide a DC bias point to the gain control module to ensure that the gain control module operates in a linear region. Optionally, the second module 012 further includes a DC bias module connected to the signal detection module (for example, Figure 3A The DC bias module 3 shown is used to provide a DC bias point to the signal detection module to ensure that the signal detection module operates in the linear region.

[0070] Optionally, the second module 012 further includes a voltage stabilization module corresponding to the gain control module or the signal detection module (for example, Figure 3A The voltage stabilizing module 2 shown in the figure is used to stabilize the voltage input to the gain control module or the signal detection module. For example, the voltage stabilizing module can be a voltage stabilizing element such as LDO. The voltage stabilizing module 2 is set between the DC bias module 2 and the second power supply to ensure that the DC bias module 2 obtains a stable DC power supply, which is beneficial to improving the stability of the DC bias point, and further beneficial to ensuring the stability of the gain control module. The voltage stabilizing module 2 is set between the DC bias module 3 and the second power supply to ensure that the DC bias module 3 obtains a stable DC power supply, which is beneficial to improving the stability of the DC bias point, and further beneficial to ensuring the stability of the signal detection module. It should be understood that Figure 3AIn the illustrated example, the gain control module and the signal detection module share the same voltage regulator module, i.e., DC bias module 2 and DC bias module 3 are connected to the same voltage regulator module. In actual applications, the gain control module and the signal detection module may also be connected to two different voltage regulator modules, i.e., DC bias module 2 and DC bias module 3 are connected to different voltage regulator modules, and both voltage regulator modules are connected to the second power supply.

[0071] It should be understood that the gain control module and the signal detection module can use the same size of the second power supply (eg Figure 3A In the example shown, both modules use a 1.8V power supply. Alternatively, different second power supplies (for example, one module uses a 1.8V power supply and the other uses a 1.6V power supply) can be used. This is not a limitation in this embodiment. When the gain control module and the signal detection module use second power supplies of different power supplies, the gain control module and the signal detection module use different voltage regulator modules.

[0072] It should be noted that the second module may also include other modules with rated operating voltages or operating voltages lower than the rated operating voltage of the amplifying module, and examples are not listed one by one here.

[0073] It should be understood that due to the increase in the number of power sources that can be connected to the signal amplifying device, the signal amplifying device needs to add a power interface, or reuse the existing interface of the signal amplifying device to connect to the power supply. In addition, the optical receiving device also needs to add a power pin, or reuse the existing pin of the optical receiving device to connect to the power supply. The following examples are respectively described:

[0074] In a possible implementation, the signal amplifying device is newly provided with a power interface, and the optical receiving device is newly provided with a power pin.

[0075] Specifically, the signal amplifying device includes a first power interface and a second power interface. The first power interface is a conventional power interface used to connect a first module within the signal amplifying device to a first power source external to the device. The second power interface is a new power interface added to this embodiment and is used to connect a second module within the signal amplifying device to a second power source external to the device. For explanations of the first module, second module, first power source, and second power source, please refer to the previous description and will not be repeated here.

[0076] At the same time, the optical receiving device includes a first power pin and a second power pin. The first power pin is a power pin already existing in the conventional technology, and is used to connect to the first power interface of the signal amplifying device, and to connect to the first power supply outside the optical receiving device. That is, the first power supply is connected to the first power interface of the signal amplifying device through the first power pin of the optical receiving device, thereby realizing the connection between the first module in the signal amplifying device and the first power supply. In addition, the second power pin is a power pin newly added in this embodiment, and is used to connect to the second power interface of the signal amplifying device, and to connect to the second power supply outside the optical receiving device. That is, the second power supply is connected to the second power interface of the signal amplifying device through the second power pin of the optical receiving device, thereby realizing the connection between the second module in the signal amplifying device and the second power supply. Optionally, in order to reduce the noise of the power supply (for example, ripple noise), a filter capacitor can be set between the first power pin and the first power interface, and a filter capacitor can also be set between the second power pin and the second power interface.

[0077] For example, Figure 3A This is a schematic diagram of an example of a signal amplification device provided in this application. Figure 3A As shown, a first power supply (e.g., a 3.3V power supply) is used to power the amplification module. Specifically, the DC voltage output by the first power supply is provided to the voltage regulator module 1, which processes the DC voltage into a stable DC voltage and provides it to the DC bias module 1. The DC bias module 1 then determines a bias voltage based on the stable DC voltage and provides it to the amplification module. A second power supply (e.g., a 1.8V power supply) is used to power the signal detection module and the gain control module. Specifically, the DC voltage output by the second power supply is provided to the voltage regulator module 2, which processes the DC voltage into a stable DC voltage and provides it to the DC bias module 2 and the DC bias module 3. The DC bias module 2 then provides a bias voltage based on the stable DC voltage to the gain control module, and the DC bias module 3 provides a bias voltage based on the stable DC voltage to the signal detection module. The amplification module receives input current, converts the current signal into a voltage signal for output, and feeds the output voltage signal back to the signal detection module and the gain control module, forming a feedback loop. This means that the signal detection module and the gain control module generate signals for adjusting the output voltage of the amplification module. Please refer to the previous article for the specific adjustment principles, which will not be elaborated here.

[0078] For example, Figure 3B This is a schematic diagram of another example of the signal amplification device provided in this application. Figure 3B The example shown is the same as Figure 3A The difference between the examples shown is that Figure 3BThe DC bias module in the present invention can have two different power supply voltages to choose from. Taking DC bias module 2 as an example, in scenarios where energy conservation is a high priority, DC bias module 2 can be configured to use a lower voltage power supply (e.g., 1.8V) to save system energy consumption. In scenarios where energy conservation is less important, or in the event of a single-board 1.8V power failure, DC bias module 2 can also be configured to use a higher voltage power supply (e.g., 3.3V) to improve the reliability and flexibility of the signal amplification device. Thus, the different modules in the signal amplification device provided in this application can support different operating voltages, which not only facilitates system energy conservation but also meets the power management requirements of different scenarios or systems, thereby achieving flexible and reliable power management.

[0079] It should be understood that if the first power supply is a stable DC power supply, the first power supply can be directly connected to the DC bias module 1 without providing the voltage regulator module 1. Similarly, if the second power supply is a stable DC power supply, the second power supply can be directly connected to the DC bias module 2 and the DC bias module 3 without providing the voltage regulator module 2. Optionally, when the bias point of the signal detection module is close to or the same as the bias point of the gain control module, the signal detection module and the gain control module can also share the same DC bias module.

[0080] For example, Figure 3C for Figure 3A The schematic diagram of an example of a light receiving device corresponding to the signal amplifying device shown in FIG. Figure 1B The example shown, in Figure 3C In the example shown, not only the Vcc pin originally used to power the TIA (used to connect to the first power supply) is retained, but also a Vdd pin (used to connect to the second power supply) is added to power the TIA. The voltage of the second power supply (i.e., the Vdd voltage) is lower than the voltage of the first power supply (i.e., the Vcc voltage). The remaining pins are the same as those in the previous section. Figure 1B The examples shown are the same, please refer to the previous article for details Figure 1B The corresponding introduction will not be repeated here. Figure 3CIn the example shown, it is assumed that the required TIA current, Icc, consists of two components: Icc1 (e.g., the current required by the first module) and Icc2 (e.g., the current required by the second module) (i.e., Icc = Icc1 + Icc2). Furthermore, the voltage corresponding to Icc1 is Vcc (e.g., 3.3V), and the voltage corresponding to Icc2 is Vdd (e.g., 1.8V). For example, if Icc is fixed at 80mA, Icc1 is 20mA, and Icc2 is 60mA, then the total TIA power consumption, P, in this example is calculated as: Icc1 × Vcc + Icc2 × Vdd = 20mA × 3.3V + 60mA × 1.8V = 174mW. In conventional technology, the total TIA power consumption, P0, is calculated as: Icc × Vcc = 80mA × 3.3V = 264mW. Therefore, this example saves 264mW - 174mW = 90mW compared to conventional solutions. For another example, if Icc is fixed at 60mA, Icc1 is 30mA, and Icc2 is 30mA, then the total power consumption of the TIA in this example is P = Icc1 × Vcc + Icc2 × Vdd = 30mA × 3.3V + 30mA × 1.8V = 153mW. In traditional technology, the total power consumption of the TIA is P0 = Icc × Vcc = 60mA × 3.3V = 198mW. Therefore, compared with the traditional solution, this example saves 198mW - 153mW = 45mW, a power reduction of more than 20%.

[0081] Thus, the optical receiver uses dual power supplies, and by reducing the operating voltage of the second module in the signal amplifier, the power consumption of the signal amplifier and, consequently, the entire optical receiver is reduced. Furthermore, Vdd can be supplied by the onboard 1.8V power supply, eliminating the need for an additional power supply, making implementation easier.

[0082] In this embodiment, the optical receiving device adds a pin (i.e., the pin for the second power supply) and the signal amplifying device adds a power interface (i.e., the second power interface), thereby enabling the connection of the added power supply (i.e., the second power supply) to the second module within the signal amplifying device. This solution is simple and easy to implement.

[0083] In another possible implementation, a new power source (ie, a second power source) reuses the control pin of the optical receiving device, and a voltage stabilizing module and a control module are newly added inside the signal amplifying device.

[0084] Specifically, the optical receiving device includes a first power pin and a control pin. The first power pin is a conventional power pin used to connect to the first power interface of the signal amplifying device and to a first power source external to the optical receiving device. That is, the first power source is connected to the first power interface of the signal amplifying device via the first power pin of the optical receiving device, thereby connecting the first module within the signal amplifying device to the first power source. Furthermore, the control pin is a power pin with a modified function in this embodiment. Conventional control pins are used to receive control signals, which can be signals generated by a digital-to-analog converter (DAC) on a single board. This control signal is used to adjust the output swing of the amplifying module within the signal amplifying device. In this embodiment, the control pin is used to connect to a second power source, which is then connected to the control interface of the signal amplifying device, thereby inputting the second power source into the signal amplifying device via the control interface.

[0085] Because the control signal used to adjust the output swing is a variable voltage signal rather than a fixed voltage signal, the second power supply provided to the second module in this embodiment is a variable power supply. For example, the voltage of the second power supply varies within a first preset range, with the maximum value of the first preset range being smaller than the voltage of the first power supply. For example, if the voltage of the first power supply is 3.3V, the voltage of the second power supply can vary between 1.6V and 1.8V. However, the second module requires a stable DC power supply, so a voltage stabilization module is required within the signal amplification device. Optionally, the voltage stabilization module can be an LDO, which is used to stabilize a slightly variable input power supply into a fixed regulated power supply. Furthermore, even if the second power supply is a variable power supply, the voltage signal output by the second power supply may not be directly used to control the output swing, so a control module is required within the signal amplification device. Optionally, the control module refers to a module or device that can map the input swing to the output swing. For example, the control module can be a swing amplifier, a comparator, or other modules or devices that can implement swing mapping, and this embodiment is not limiting.

[0086] Inside the signal amplifying device, a voltage stabilizing module is connected to the second power supply via a control interface, and a control module is connected to the second power supply via a control interface. The voltage stabilizing module is configured to process the output voltage of the second power supply into a first voltage signal of a fixed magnitude, and the first voltage signal is used to power the second module. This means that stable power supply to the second module is achieved through the first voltage signal, which is beneficial for improving the stability of power supply to the second module. Furthermore, the control module is configured to determine a second voltage signal based on the output voltage of the second power supply, and the second voltage signal is used to adjust the output swing of the target voltage signal. The voltage magnitude of the second voltage signal varies within a second preset range, which is different from the first preset range. That is, in this embodiment, the control signal for adjusting the output swing of the output voltage of the amplifying module is a second voltage signal generated by the control module based on the output voltage of the second power supply, rather than directly using the output voltage of the second power supply or an external input signal, which is beneficial for improving the reliability of the control signal.

[0087] For example, Figure 4A FIG. 1 is a schematic diagram of another example of a signal amplifying device. Figure 4A As shown, a first power supply (e.g., a 3.3V power supply) is used to power the amplification module. Specifically, the DC voltage output by the first power supply is provided to the voltage regulator module 1, which processes the DC voltage into a stable DC voltage and provides the stable DC voltage to the DC bias module 1. The DC bias module 1 then determines a bias voltage based on the stable DC voltage and provides the bias voltage to the amplification module. The second power supply is a variable power supply (e.g., a power supply with a voltage value that can vary between 1.6V and 1.8V). It is used to power the signal detection module and the gain control module, and provides an input for generating a control signal to the control module. The variable DC voltage output by the second power supply is provided to the voltage regulator module 2, which processes the variable DC voltage into a stable DC voltage. For example, a voltage varying between 1.6V and 1.8V is converted into a stable DC voltage of 1.8V. This stable DC voltage is then provided to subsequent modules (e.g., the DC bias module 2, the DC bias module 3, the signal detection module, and the gain control module). On the other hand, the variable DC voltage output by the second power supply is transmitted to the control module. The control module generates a control signal (for example, the second voltage signal described above) based on the variable DC voltage to control the output swing of the output voltage of the amplifier module. In addition, in this example, the functions of the DC bias module 2, the DC bias module 3, the signal detection module, the gain control module, and the amplifier module are the same as those described above. Figure 3A The examples shown are similar and are not repeated here.

[0088] It should be understood that if the first power supply is a stable DC power supply, the first power supply can be directly connected to the DC bias module 1 without setting up the voltage stabilizing module 1. Since the second power supply is a variable DC power supply, the voltage stabilizing module 2 is required. Optionally, when the bias point of the signal detection module is close to or the same as the bias point of the gain control module, the signal detection module and the gain control module can also share the same DC bias module. It should also be understood that Figure 4A The DC bias module in the example shown can also be set to select one of two different power supply voltages. Figure 3B The examples shown are similar and are not repeated here.

[0089] For example, Figure 4B for Figure 4A The schematic diagram of an example of a light receiving device corresponding to the signal amplifying device shown in FIG. Figure 1B The example shown, Figure 4B The example shown retains the Vcc pin originally used to power the TIA (for connecting to the first power supply). The working principle of the Vcc pin is the same as Figure 1B The examples shown are similar, please refer to the previous article for details Figure 1B In the example shown, Figure 4B The example shown modifies the function of the control pin (i.e., the VOA pin). For example, the VOA pin is added with the function of a Vdd pin (used to connect to a second power supply) to power the TIA, where the voltage of the second power supply (i.e., the Vdd voltage) is lower than the voltage of the first power supply (i.e., the Vcc voltage). The remaining pins are the same as those in the previous text. Figure 1B The examples shown are the same, please refer to the previous article for details Figure 1B The corresponding introduction will not be repeated here. Figure 4B The energy-saving principle of the example shown is similar to the energy-saving principle described above and is not described here in detail.

[0090] In this embodiment, the VOA pin is reused as the pin for connecting to the Vdd power supply, without increasing the number of pins in the optical receiver, thereby maintaining the original package form of the optical receiver. Since the fewer pins a TO package has, the more convenient it is for miniaturization, this embodiment not only saves energy for the optical receiver, but also facilitates its miniaturization.

[0091] In another possible implementation, a new power source (ie, a second power source) reuses the output pin of the optical receiving device, and capacitors and inductors are added to the outside of the signal amplifying device.

[0092] Specifically, the optical receiving device includes a first power pin, a first output pin, and a second output pin. The first power pin is a power pin already existing in conventional technology, and is used to connect to the first power interface of the signal amplifying device, and to connect to the first power supply outside the optical receiving device. The details are similar to the aforementioned embodiment and will not be repeated here. In addition, the first output pin and the second output pin are pins with modified functions in this embodiment. The output pins in conventional technology are used to output voltage signals. For example, the TIAout+ pin and the TIAout- pin are respectively connected to the two output interfaces of the TIA, and are used to output the voltage signal generated by the TIA (for example, a differential voltage signal). The output pins of the optical receiving device in this embodiment (for example, the TIAout+ pin and the TIAout- pin) are used to connect to a second power supply, so that the voltage provided by the second power supply can power the TIA without affecting the output voltage of the TIA.

[0093] For example, Figure 5A As shown, since the voltage provided by the second power supply is a DC voltage and the voltage output by the signal amplifying device is an AC voltage, a capacitor and an inductor are connected to the output pin outside the signal amplifying device, and the capacitor and the inductor are connected in parallel. Among them, the inductor has the characteristic of passing AC and blocking DC, and can conduct the DC signal provided by the second power supply into the signal amplifying device, and block the AC signal output by the signal amplifying device. The capacitor has the characteristic of passing DC and blocking AC, and can transmit the AC signal output by the signal amplifying device through the capacitor, and block the DC signal provided by the second power supply from mixing in. In this example, the functions of the first power supply, DC bias module 2, DC bias module 3, signal detection module, gain control module and amplification module are the same as those in the previous text. Figure 3A The examples shown are similar and are not repeated here.

[0094] For example, Figure 5B As shown, the first output pin (e.g., TIAout+ pin) of the optical receiving device is connected to the first output interface of the signal amplifying device. The first output pin is connected to the second power supply via a first inductor (e.g., L1). The first output pin is also connected to a first capacitor (e.g., C1), and the first capacitor and the first inductor are connected in parallel. Furthermore, the second output pin (e.g., TIAout- pin) of the optical receiving device is connected to the second output interface of the signal amplifying device. The second output pin is connected to the second power supply via a second inductor (e.g., L2). The second output pin is also connected to a second capacitor (e.g., C2), and the second capacitor and the second inductor are connected in parallel. Optionally, the capacitance value of the first capacitor and the second capacitor can be the same. Optionally, the inductance value of the first inductor and the second inductor can be the same.

[0095] For example, Figure 5C for Figure 5AThe schematic diagram of an example of a light receiving device corresponding to the signal amplifying device shown in FIG. Figure 1B The example shown, Figure 5C The example shown retains the Vcc pin originally used to power the TIA (for connecting to the first power supply). The working principle of the Vcc pin is the same as Figure 1B The examples shown are similar, please refer to the previous article for details Figure 1B In the example shown, Figure 5C The example shown modifies the functions of the output pins (e.g., TIAout+ and TIAout-). For example, the output pins are configured to be connected to a second power supply, where the voltage of the second power supply (i.e., Vdd) is lower than the voltage of the first power supply (i.e., Vcc). The remaining pins are the same as those in the previous section. Figure 1B The examples shown are the same, please refer to the previous article for details Figure 1B The corresponding introduction will not be repeated here. Figure 5C The energy-saving principle of the example shown is similar to the energy-saving principle described above and is not described here in detail.

[0096] In this embodiment, multiplexed output pins (for example, the TIAout+ and TIAout- pins) are used as pins for connecting to the Vdd power supply, without increasing the pin count of the optical receiver, thereby maintaining the original package form of the optical receiver. Since fewer pins in a TO package facilitates TO package miniaturization, this embodiment not only saves energy but also contributes to the miniaturization of the optical receiver.

[0097] In addition, the present application also provides a signal amplification device, which includes a first module and a second module, and the rated operating voltage of the first module is greater than the rated operating voltage of the second module. The first module is used to receive a current signal, convert the current signal into a voltage signal, and amplify the voltage signal to obtain a target voltage signal; the second module is used to assist the first module in outputting a target voltage signal; wherein, the first module is powered by a first power supply, and the second module is powered by a second power supply, and the voltage of the second power supply is less than the voltage of the first power supply. For explanations of the first module, the second module, the first power supply, and the second power supply, please refer to the previous text Figure 2 The relevant introduction in the corresponding embodiment is not repeated here. Exemplarily, the signal amplifying device is a TIA.

[0098] In this embodiment, the TIA can connect to two power supplies of different voltages. A higher voltage (e.g., 3.3V) power supply powers the first module (e.g., the amplifier module), while a lower voltage (e.g., 1.8V) power supply powers the second module. Compared to traditional technologies, using a single higher voltage (e.g., 3.3V) power supply saves energy.

[0099] In addition, the present application also provides an optical component, which includes Figure 2 The optical receiving device described herein is used to convert received optical signals into electrical signals. Optionally, the optical component further includes an optical transmitting device used to convert electrical signals into optical signals for transmission.

[0100] In one example, the optical component may be a bidirectional optical component including an optical transmitting device and an optical receiving device.

[0101] In another example, the optical component may be a three-way optical component including two optical transmitting devices and one optical receiving device.

[0102] In this embodiment, since the light receiving device achieves energy saving by being connected to two power supplies with different voltages, the optical component including the light receiving device also achieves energy saving to a certain extent.

[0103] In addition, the present application also provides an optical module, which includes Figure 2 The optical receiving device is introduced.

[0104] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A light receiving device, characterized in that: include: Photoelectric detection device and signal amplification device; The photoelectric detection device is used to convert the received light signal into a current signal; The signal amplifying device is used to convert the current signal into a voltage signal and amplify the voltage signal to obtain a target voltage signal; The signal amplifying device is connected to a first power supply and a second power supply, the first power supply is used to power the first module in the signal amplifying device, and the second power supply is used to power the second module in the signal amplifying device. The rated operating voltage of the first module is greater than the rated operating voltage of the second module, and the voltage of the second power supply is less than the voltage of the first power supply.

2. The light receiving device according to claim 1, wherein The optical receiving device further includes a first power pin and a second power pin; The first power pin is connected to the first power interface of the signal amplifying device, the first power pin is used to connect to the first power supply, and the first power interface is used to connect to the first module; The second power pin is connected to the second power interface of the signal amplifying device. The second power pin is used to connect to the second power supply, and the second power interface is used to connect to the second module.

3. The light receiving device according to claim 1, wherein The light receiving device further includes a first power pin and a control pin; The first power pin is connected to the first power interface of the signal amplifying device, the first power pin is used to connect to the first power supply, and the first power interface is used to connect to the first module; The control pin is connected to the control interface of the signal amplifying device, and the control pin is used to connect to the second power supply.

4. The light receiving device according to claim 3, wherein The voltage of the second power supply varies within a first preset range; The signal amplifying device further includes a voltage stabilizing module and a control module, wherein the voltage stabilizing module is connected to the second power supply via the control interface, and the control module is connected to the second power supply via the control interface; The voltage stabilizing module is configured to process the output voltage of the second power supply into a first voltage signal of a fixed magnitude, where the first voltage signal is used to supply power to the second module; The control module is used to determine a second voltage signal based on the output voltage of the second power supply, and the second voltage signal is used to adjust the output swing of the target voltage signal. The voltage of the second voltage signal varies within a second preset range, and the second preset range is different from the first preset range.

5. The light receiving device according to claim 1, wherein The optical receiving device further includes a first power pin, a first output pin, and a second output pin; The first power pin is connected to the first power interface of the signal amplifying device, the first power pin is used to connect to the first power supply, and the first power interface is used to connect to the first module; The first output pin is connected to the first output interface of the signal amplifying device, the first output pin is connected to the second power supply via a first inductor, the first output pin is also connected to a first capacitor, and the first capacitor is connected in parallel with the first inductor; The second output pin is connected to the second output interface of the signal amplifying device, the second output pin is connected to the second power supply through a second inductor, the second output pin is also connected to a second capacitor, and the second capacitor is connected in parallel with the second inductor.

6. The light receiving device according to any one of claims 1 to 4, characterized in that The optical receiving device also includes a first output pin and a second output pin; the first output pin is connected to the first output interface of the signal amplifying device, and the second output pin is connected to the second output interface of the signal amplifying device, and the first output interface and the second output interface are used to output the target voltage signal.

7. The light receiving device according to any one of claims 1, 2 or 5, characterized in that: The optical receiving device further includes a control pin connected to a control interface of the signal amplifying device. The control interface is used to receive a control signal, and the control signal is used to adjust the output swing of the target voltage signal.

8. The light receiving device according to any one of claims 1 to 5, characterized in that The light receiving device further includes a third power pin, which is connected to the photoelectric detection device and is used to supply power to the photoelectric detection device.

9. The light receiving device according to any one of claims 1 to 5, characterized in that The optical receiving device further includes a ground pin.

10. The light receiving device according to any one of claims 1 to 5, characterized in that: The optical receiving device adopts coaxial packaging.

11. The light receiving device according to any one of claims 1 to 5, characterized in that: The second module includes: Signal detection module, and / or, gain control module.

12. An optical component, characterized in that: include: The optical receiving device according to any one of claims 1 to 11, wherein the optical receiving device is configured to convert a received optical signal into an electrical signal.

13. The optical assembly according to claim 12, wherein: The optical component further includes an optical transmitting device, which is used to convert an electrical signal into an optical signal.

14. A signal amplifying device, characterized in that: include: A first module and a second module, wherein a rated operating voltage of the first module is greater than a rated operating voltage of the second module; The first module is configured to receive a current signal, convert the current signal into a voltage signal, and amplify the voltage signal to obtain a target voltage signal; The second module is used to assist the first module in outputting the target voltage signal; The first module is powered by a first power supply, the second module is powered by a second power supply, and the voltage of the second power supply is lower than the voltage of the first power supply.

15. The signal amplifying device according to claim 14, wherein: The second module includes: Signal detection module, and / or, gain control module.

16. The signal amplifying device according to claim 14 or 15, characterized in that: The signal amplifying device includes a first power interface; The first power interface is used to connect the first module and the first power supply.

17. The signal amplifying device according to claim 16, wherein: The signal amplifying device further includes a second power supply interface; The second power interface is used to connect the second module and the second power supply.

18. The signal amplifying device according to claim 16, wherein: The signal amplifying device further includes a control interface; The control interface is used to connect to the second power supply, and the voltage of the second power supply varies within a first preset range.

19. The signal amplifying device according to claim 18, wherein: The signal amplifying device further includes a voltage stabilizing module and a control module, wherein the voltage stabilizing module is connected to the second power supply via the control interface, and the control module is connected to the second power supply via the control interface; The voltage stabilizing module is configured to process the voltage of the second power supply into a first voltage signal of a fixed magnitude, where the first voltage signal is used to supply power to the second module; The control module is used to determine a second voltage signal based on the output voltage of the second power supply, and the second voltage signal is used to adjust the output swing of the target voltage signal. The voltage of the second voltage signal varies within a second preset range, and the second preset range is different from the first preset range.

20. The signal amplifying device according to claim 16, wherein: The signal amplifying device further includes a first output interface and a second output interface; The first output interface and the second output interface are used to connect to the second power supply through an inductor.

21. The signal amplifying device according to claim 14 or 15, characterized in that: The signal amplifying device further includes an input interface, a first output interface, and a second output interface. The input interface is used to receive the current signal. The first output interface and the second output interface are used to output the target voltage signal, which is an AC voltage signal.

22. The signal amplifying device according to claim 14 or 15, characterized in that: The signal amplifying device further includes a control interface, wherein the control interface is used to receive a control signal, and the control signal is used to adjust the output swing of the target voltage signal.

Images