Dual-mode event-triggering circuit and detection system based on optical detection and optical synapse

Abstract

The application discloses a dual-mode event trigger circuit based on light detection and optical synapse, comprising a detection module and a detection module; the detection module is used for triggering based on light events or voltage events, converting received optical signals or electrical signals into current signals, and transmitting the current signals to the detection module; the detection module is used for collecting current signals and performing corresponding event detection; wherein the detection module is configured with an optoelectronic device integrating light detection and optical synapse functions, when the optoelectronic device is subjected to light and no external voltage is applied, the optoelectronic device behaves as a light detection mode, at the same time, the detection module works in a light event detection mode; when the optoelectronic device is simultaneously subjected to an external voltage and light, the optoelectronic device behaves as an optical synapse mode, at the same time, the detection module works in a voltage event detection mode. The circuit realizes dual-mode event triggering by using simple devices, has compact circuit structure, high device integration, does not need a complex multi-stage decision circuit, and effectively reduces energy consumption.

Description

Technical Field

[0001] This invention belongs to the field of electronic circuit technology, specifically relating to a dual-mode event triggering circuit and detection system based on photodetection and photosynapse. Background Technology

[0002] With the development of intelligent sensing systems, neuromorphic information processing, and edge computing technologies, the way electronic systems acquire information in complex environments is gradually shifting from the traditional continuous sampling mode to an event-driven mode. Compared to continuous sampling and periodic processing, event-driven signal processing only generates a response when the input signal changes or when specific triggering conditions are met. This effectively reduces redundant data and system power consumption, demonstrating significant advantages in low-power sensing and real-time response applications.

[0003] In existing technologies, event-triggered circuits (also known as event-driven circuits) have been widely used in voltage change detection, illumination change sensing, and the implementation of brain-like neuron models. For example, event-triggered circuits based on the dynamic characteristics of comparators, capacitor integrators, or memristors can typically output pulse signals when the input voltage undergoes a transition; event-driven structures based on optoelectronic devices can trigger an event response when illumination changes. These circuits are characterized by their relatively simple structure and fast response speed in detecting single stimulus changes.

[0004] However, most existing event-driven circuits rely on changes in the input signal itself as the trigger condition. When the input voltage or light signal is in a stable state, these circuits often cease to generate event outputs, making it difficult to form an effective event response to changes in another physical quantity. For example, when light is continuously present, traditional photoelectric event triggering structures typically enter a silent state, making it difficult to further detect superimposed voltage events; similarly, under the condition of constant voltage, conventional voltage event detection circuits also struggle to respond to changes in light stimulation.

[0005] In addition, although some existing technologies have achieved the separate perception of different stimuli by introducing multiple detection channels or cascaded circuits, such schemes usually rely on multi-level decision-making or post-level signal processing circuits, which increases the complexity of the system structure. At the same time, there is still a lack of a circuit mechanism that can effectively switch between multiple triggering modes according to different stimulus conditions in a single event-driven structure.

[0006] In practical applications, such as industrial monitoring nodes, automotive electronic systems, and intelligent sensing terminals, circuits often operate in a state where illumination or bias voltage remains stable for extended periods. However, the actual requirement is to perceive transient changes in another type of input signal in real time. For example, under constant lighting conditions, it is necessary to detect voltage surges in external control or power supply circuits; or, when the bias voltage remains stable, it is necessary to respond to sudden changes in ambient light. However, existing event-driven circuits typically rely on continuous changes in the input signal itself as the trigger condition, making it difficult to effectively trigger events from another type of input while one type of input remains stable.

[0007] In summary, the existing technology still lacks an event-driven circuit structure that can detect voltage events when illumination is continuous, or detect illumination events when the voltage remains stable, thereby achieving dual-mode event triggering and information perception without relying on continuous signal changes. Summary of the Invention

[0008] To address the aforementioned problems in the prior art, this invention provides a dual-mode event triggering circuit and detection system based on photodetection and photosynapse. The technical problem to be solved by this invention is achieved through the following technical solution: In a first aspect, the present invention proposes a dual-mode event triggering circuit based on photodetection and photosynapse, including a detection module and a detection module; The detection module is used to convert the received light or electrical signal into a current signal based on the triggering of a light or voltage event, and then transmit it to the detection module. The detection module is used to collect current signals and perform corresponding event detection; The detection module is equipped with an optoelectronic device that integrates photodetection and photosynaptic functions. When light is applied to the optoelectronic device without an external voltage, it operates in photodetection mode, while the detection module operates in light event detection mode. When both external voltage and light are applied to the optoelectronic device, it operates in photosynaptic mode, while the detection module operates in voltage event detection mode.

[0009] In one embodiment of the present invention, in the illumination event detection mode, an external voltage is continuously applied to the optoelectronic device; correspondingly, in the voltage event detection mode, continuous illumination is applied to the optoelectronic device.

[0010] In one embodiment of the present invention, the detection module includes two identical optoelectronic devices S1 and S2 that integrate photodetection and photosynaptic functions, and the optoelectronic devices S1 and S2 are connected in series. Among them, the top of the optoelectronic device S1 is connected to the input voltage V. dd ; The bottom end of optoelectronic device S1 is connected to the top end of optoelectronic device S2, and the common end of both serves as the output end of the detection module, used to output the current signal I. R To the detection module; The bottom of the optoelectronic device S2 is grounded.

[0011] In one embodiment of the present invention, the input voltage V dd It is an adjustable voltage source with a voltage variation range of 0V-1V.

[0012] In one embodiment of the present invention, optoelectronic devices S1 and S2 are passive electronic devices, and their specific structure is a double-ended structure, which includes a bottom electrode, an intermediate functional layer and a top electrode from bottom to top; the intermediate functional layer includes a heterojunction composed of two oxides.

[0013] In one embodiment of the present invention, the detection module includes a detection resistor R, one end of which is connected to the bottom end of the optoelectronic device S1 and the top end of the optoelectronic device S2; the other end of the detection resistor R is grounded.

[0014] In one embodiment of the present invention, the resistance value of the detection resistor R should be much smaller than the minimum resistance exhibited by the optoelectronic devices S1 and S2 in photodetector or photosynapse mode.

[0015] Secondly, the present invention proposes an electronic detection system that integrates a dual-mode event triggering circuit based on photodetection and photosynapse provided in the first aspect of the present invention.

[0016] The beneficial effects of this invention are: The present invention provides a dual-mode event triggering circuit based on photodetection and photosynapsis, comprising a detection module and a detection module. The detection module is used to convert received light or electrical signals into current signals based on triggering events of light or voltage, and transmits them to the detection module. The detection module is used to collect current signals and perform corresponding event detection. The detection module is equipped with an optoelectronic device integrating photodetection and photosynapsis functions. When light is applied to the optoelectronic device without an external voltage, it operates in photodetection mode, and the detection module operates in light event detection mode. When both an external voltage and light are applied to the optoelectronic device, it operates in photosynapsis mode, and the detection module operates in voltage event detection mode. By utilizing the photoelectric detection and photosynaptic characteristics and structural features of optoelectronic devices, voltage events can be detected when illumination is continuous, or illumination events can be detected when the voltage remains stable, thus realizing dual-mode event triggering. Moreover, the circuit structure is compact, the device integration is high, and there is no need for complex multi-stage decision circuits. It only outputs an nA-level current signal when an event occurs, effectively reducing energy consumption. It realizes the output of current type under two modes of illumination events with constant voltage and voltage events with constant illumination using a simple circuit structure, which to a certain extent promotes the development of dual-mode event triggering structure research.

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1 The structural block diagram of the dual-mode event triggering circuit based on photodetector and photosynapse provided in the embodiment of the present invention; Figure 2 This is a structural example diagram of the detection module provided in an embodiment of the present invention; Figure 3 This is a structural example diagram of an optoelectronic device provided in an embodiment of the present invention; Figure 4 This is a structural example diagram of the detection module provided in an embodiment of the present invention; Figure 5 A detailed structural diagram of the dual-mode event triggering circuit based on photodetector and photosynapse provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the input and output of the dual-mode event triggering circuit based on photodetection and photosynapse provided in the embodiment of the present invention in the light event detection mode; Figure 7 This is a schematic diagram of the input and output of a dual-mode event triggering circuit based on photodetection and photosynapse provided in an embodiment of the present invention in voltage event detection mode. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] First, before introducing the solution of this invention, we will first introduce the application of existing optoelectronic devices and the existing event-driven circuits.

[0021] On the one hand, existing optoelectronic devices, based on their inherent photodetector function, are usually used as photodetector units in circuits to achieve rapid transient response to changes in illumination. However, their potential multi-photosynaptic functions, such as slow conductance modulation and memory characteristics, are significantly different from photodetector functions in terms of functional positioning and circuit application, as they focus on the slow evolution and memory characteristics of photoinduced current. Therefore, they have not been included in the design of event detection mechanisms.

[0022] On the other hand, most existing event-driven circuits rely on abrupt changes in the input signal or threshold crossing as triggering conditions. Their design rarely considers event detection through specific circuit structures when the input signal (such as light or voltage) is in a continuously stable state. Especially in the use of optoelectronic devices, existing technologies generally do not anticipate that by constructing a differential structure composed of identical devices, particularly when two identical optoelectronic devices are connected in series, the difference in their operating modes can generate current differences that can be used for event triggering under continuous input conditions.

[0023] Furthermore, even recognizing that some optoelectronic devices may possess multiple characteristics, existing circuit designs have failed to effectively utilize their various operating modes under different bias and illumination conditions at the circuit level, nor have they systematically designed them as a switchable event detection mechanism. The inherent notion in traditional circuit design that "identical devices should produce identical responses" also limits the exploration of such potential applications.

[0024] Based on this, the present invention innovatively integrates and utilizes multiple operating modes of the same optoelectronic device to design a dual-mode event-driven circuit scheme. This scheme realizes dual-mode detection of light events and voltage events through a unique circuit structure.

[0025] Specifically, the first aspect of this invention provides a dual-mode event triggering circuit based on photodetection and photosynapse. Please refer to... Figure 1 , Figure 1This is a structural block diagram of a dual-mode event triggering circuit based on photodetector and photosynapse provided in an embodiment of the present invention. It is mainly used to illustrate the overall circuit framework of the present invention and the connection relationships between its modules. For example... Figure 1 As shown, the dual-mode event triggering circuit based on photodetection and photosynapse provided by this invention mainly includes two modules, namely, a detection module 101 and a detection module 102; wherein, The detection module 101 is used to convert the received light signal or electrical signal into a current signal based on the triggering of a light event or voltage event, and transmit it to the detection module 102. The detection module 102 is used to collect current signals and perform corresponding event detection; The detection module 101 is equipped with an optoelectronic device that integrates photodetection and photosynaptic functions. When light is applied to the optoelectronic device and no external voltage is applied, it operates in photodetection mode. At the same time, the detection module 102 operates in light event detection mode. When both external voltage and light are applied to the optoelectronic device, it operates in photosynaptic mode. At the same time, the detection module 102 operates in voltage event detection mode.

[0026] It should be noted that when the circuit is operating in the light event detection mode, an external voltage should be continuously applied to the photoelectric device; correspondingly, the external voltage applied to the photoelectric device should be continuous; in the voltage event detection mode, the light applied to the photoelectric device should be continuous.

[0027] Alternatively, as one implementation method, please refer to Figure 2 , Figure 2 The diagram shows a structural example of a detection module provided in an embodiment of the present invention. The detection module 101 includes two identical optoelectronic devices S1 and S2 that integrate photodetection and photosynaptic functions, and the optoelectronic devices S1 and S2 are connected in series. Among them, the top of the optoelectronic device S1 is connected to the input voltage V. dd The bottom end of photoelectric device S1 is connected to the top end of photoelectric device S2, and the common end of both serves as the output end of detection module 101, used to output current signal I. R Connect to the detection module 102; the bottom of the optoelectronic device S2 is grounded.

[0028] It is understandable that the input voltage V dd It is an adjustable voltage source with a voltage variation range of 0V-1V. The specific mode (continuous or detection) is selected based on the detection light mode or detection voltage mode.

[0029] Furthermore, the photoelectric devices S1 and S2, which integrate photodetection and photosynaptic functions, have the following functions: when no external bias voltage is applied, the device generates a rapid photocurrent when illumination is applied, and the photocurrent disappears rapidly after the illumination is removed, exhibiting photodetection performance; when an external voltage is applied to the device while illumination is applied, the device exhibits a slow increase in photocurrent, and the photocurrent slowly decreases after the illumination is removed, exhibiting biological synaptic function, i.e., photosynaptic function. In this embodiment, since the top of the photoelectric device S1 is connected to the input voltage V... dd Therefore, in the light event detection mode, it exhibits photosynaptic characteristics, and in the voltage event detection mode, it exhibits photodetection characteristics when there is no voltage and photosynaptic characteristics when the voltage suddenly appears. Since there is no external voltage, the optoelectronic device S2 exhibits photodetection characteristics in both modes. When there is no voltage excitation, the greater the light intensity, the greater the photocurrent generated by optoelectronic devices S1 and S2. When there is voltage excitation, the greater the voltage and the stronger the light, the more obvious the synaptic characteristics are.

[0030] Therefore, optoelectronic devices S1 and S2 are mainly used to detect light intensity in the light event detection mode. Optoelectronic device S1 is mainly used to detect voltage changes in the voltage event detection mode.

[0031] It is understood that the photoelectric devices S1 and S2 used in this invention sense light and voltage changes, and the input voltage V is used in the light event detection mode. dd The excitation should be continuous. In voltage-time detection mode, the illumination should be continuous, but there are no requirements for the intensity of the illumination.

[0032] Alternatively, as one implementation method, please refer to Figure 3 , Figure 3 This is an example diagram illustrating the structure of the optoelectronic device provided in an embodiment of the present invention. In this embodiment, the optoelectronic devices S1 and S2, which integrate photodetector and photosynaptic functions, are passive electronic devices. Their specific structure is a double-ended structure, comprising a bottom electrode, a middle functional layer, and a top electrode from bottom to top; the middle functional layer includes a heterojunction composed of two oxides. For example... Figure 3 The optoelectronic device shown uses ITO (indium tin oxide) electrodes for both the bottom and top electrodes, and a heterojunction of VO2 (vanadium dioxide) / IGZO (indium gallium zinc oxide) for the middle functional layer. When illumination is applied without an external bias voltage, photogenerated carriers generate a self-powered photocurrent under the influence of the heterojunction's built-in electric field. This photocurrent exhibits a rapid response to the application and removal of illumination, displaying a photodetector mode. When illumination is applied with a forward bias voltage, the applied voltage further ionizes the defect oxygen vacancies in the oxide semiconductor. Due to the continuous photoconductivity effect, the device generates a slow rise and fall in photocurrent, exhibiting current response characteristics similar to biological synapses.

[0033] For further details, please see Figure 4 , Figure 4 This is a structural example diagram of the detection module provided in an embodiment of the present invention. The detection module 102 includes a detection resistor R, one end of which is connected to the bottom of the photoelectric device S1 and the top of the photoelectric device S2; the other end of the detection resistor R is grounded.

[0034] The value of the sensing resistor R should be much smaller than the minimum resistance exhibited by optoelectronic devices S1 and S2 in photodetector or photosynapse mode.

[0035] In this embodiment, the detection module is also used to detect the current generated by photoelectric devices S1 and S2 after being triggered by light or voltage events. In the light event detection mode, photoelectric device S1 exhibits photosynaptic characteristics, that is, the output current rises slowly when light is applied and decreases slowly after the light is removed. Photoelectric device S2 exhibits photodetector characteristics, that is, it outputs a rapid transient current when light is applied and the current decays rapidly after the light is removed. The detection resistor R, by connecting the bottom of S1 and the top of S2, can obtain the difference signal of the currents of the two devices, that is, the photosynaptic current of S1 minus the photodetector current of S2. This differential current signal is used as the event trigger criterion in the detection module, thereby realizing accurate detection of light events. In the voltage event detection mode, the detection resistor R is also used to obtain the current difference signal of S1 and S2. When no voltage excitation is applied, S1 and S2 only exhibit photodetector characteristics, and their output currents are the same, so there is basically no current flowing through the detection resistor R. When an input voltage excitation is applied to S1, S1 exhibits photosynaptic characteristics, and its current undergoes a sudden change, while S2 still only exhibits photodetector characteristics, and its output current remains unchanged. At this time, the sensing resistor R obtains the current difference signal between S1 and S2. This differential signal is used by the detection module to trigger the event output, thereby achieving effective detection of voltage events.

[0036] It is worth mentioning that, in the light event detection mode, the input voltage V is required. dd When the illumination remains constant, the detection module can trigger events in response to changes in illumination by using the current difference signal between photoelectric devices S1 and S2. In voltage event detection mode, illumination is required, but the intensity of the illumination can vary arbitrarily. S1 exhibits photosynaptic characteristics under voltage excitation, while S2 maintains photoelectric detection characteristics. The detection module triggers event output by acquiring the current difference between the two devices.

[0037] Understandably, the resistance of the sensing resistor R should be much smaller than the minimum resistance exhibited by photodetectors S1 and S2 in photodetector or photosynapse mode, approximately in the range of 100Ω-10kΩ. Since photodetector S1 is connected in series with the parallel portion of photodetector S2 and sensing resistor R in the overall structure, the input voltage V needs to be... ddMost of the voltage is distributed to the excitation of photoelectric device S1, not to the excitation of photoelectric device S2; photoelectric device S2 is connected in parallel with the sensing resistor, so the overall resistance should be less than the sensing resistor R according to Ohm's law. Therefore, with a relatively small value for the sensing resistor R, according to Ohm's law, most of the input voltage V... dd The voltage is divided by the optoelectronic device S1. Therefore, under sufficient voltage excitation, the optoelectronic device S1 exhibits photosynaptic characteristics in different detection modes. The optoelectronic device S2 does not need to exhibit photosynaptic characteristics, but only photodetector characteristics.

[0038] In this context, the detection resistor R plays the same role in both optical event detection and voltage event detection modes. Regardless of whether it is optical event detection or voltage event detection, the detection resistor R obtains the differential current of optoelectronic device S1 and optoelectronic device S2, and uses it for event detection in different modes. The magnitude of the current flowing through the detection resistor R is the event detection criterion.

[0039] As can be seen, this invention utilizes a simple circuit structure to achieve current-type output under two modes: illumination events under constant voltage and voltage events under constant illumination, thus realizing dual-mode event triggering and information perception.

[0040] Optionally, in one embodiment of the present invention, Figure 2 The detection module shown and Figure 4 The detection module connections shown constitute the dual-mode event triggering circuit of this invention based on photodetection and photosynapse. A detailed circuit diagram is shown below. Figure 5 As shown.

[0041] To better demonstrate the effects of the present invention, the following is based on... Figure 5 The detailed structural diagram shown illustrates the experimental testing of the dual-mode event triggering circuit based on photodetection and photosynapse provided by this invention.

[0042] First, optical signal event detection is performed under continuous voltage, with a power supply voltage of V. dd The voltage is 0.05V, the detection resistor is 1000Ω, and the light event signal is a 16s 365nm ultraviolet light pulse signal. The initial conditions are darkness, and at the start of the illumination period, the voltage is 10... - 5 The light intensity increased to 20 mW / cm² within s. 2 And lasted for 16 seconds, then at 10 -5 The light intensity decreased to 0 mW / cm within s. 2 Under the above conditions, the circuit's input and output were tested, and the results are as follows. Figure 6As shown; where purple is the current output curve after applying a light signal to optoelectronic device S1, blue is the current output curve of optoelectronic device S2 after illumination, and red is the current curve of the illumination time detection result, which shows a peak current response when the illumination appears and disappears.

[0043] Then, voltage event detection is performed in continuous illumination mode, with the power supply voltage V. dd A 16-second pulse signal of 0.05V, initially 0V, increases to 10V when a voltage event occurs. -5 s rises to 0.05V, and the voltage event ends at 10. -5 The voltage drops to 0V within seconds. The detection resistor is 1000Ω, the illumination signal is continuous 365nm ultraviolet light, and the light intensity is 20mW / cm². 2 Under the above conditions, the circuit's input and output were tested, and the results are as follows. Figure 7 As shown; purple represents the current output curve after a voltage event signal is applied to optoelectronic device S1, blue represents the current output curve of optoelectronic device S2 after a voltage event, and red represents the current curve of the voltage event detection result. It exhibits a synaptic current response when the voltage appears and disappears. Both detection modes have event-driven response characteristics, realizing the completion of the event triggering structure using a simple circuit structure of the same optoelectronic device, which to a certain extent promotes the development of dual-mode event triggering circuit structure research.

[0044] In summary, this invention utilizes the photodetector and photosynaptic characteristics and structural features of optoelectronic devices to realize a dual-mode event triggering circuit based on photodetector and photosynapse. This circuit can detect voltage events when illumination is continuous, or detect illumination events when the voltage remains stable, achieving dual-mode event triggering. Furthermore, the circuit has a compact structure, high device integration, and eliminates the need for complex multi-stage decision circuits, outputting only an nA-level current signal when an event occurs, effectively reducing energy consumption. It achieves current-type output under both illumination events with constant voltage and voltage events with constant illumination using a simple circuit structure, thus promoting the development of dual-mode event triggering structure research to some extent.

[0045] Based on the same inventive concept, a second aspect of the present invention also provides an electronic detection system that integrates a dual-mode event triggering circuit based on photodetection and photosynapse provided in the first aspect of the present invention.

[0046] Specifically, the electronic detection system provided in this embodiment can be an intelligent sensing system, a brain-like sensing system, an industrial detection system, an in-vehicle electronic system, etc. By applying the above-mentioned dual-mode event triggering circuit based on photodetection and photosynapse to such systems, dual-mode event triggering and information perception can be achieved without relying on continuous signal changes.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0048] Although this application has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the accompanying drawings, the disclosure, and the appended claims, will understand and implement other variations of the disclosed embodiments in carrying out the claimed application. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple instances. A single processor or other unit can implement several functions listed in the claims. While different dependent claims may recite certain measures, this does not mean that these measures cannot be combined to produce good results.

[0049] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A dual-mode event triggering circuit based on photodetection and photosynapse, characterized in that, It includes a detection module (101) and a detection module (102); The detection module (101) is used to convert the received light signal or electrical signal into a current signal based on the triggering of a light event or voltage event, and transmit it to the detection module (102). The detection module (102) is used to collect the current signal and perform corresponding event detection; The detection module (101) is equipped with an optoelectronic device that integrates photodetection and photosynaptic functions. When light is applied to the optoelectronic device without an external voltage, it operates in photodetection mode. At the same time, the detection module (102) operates in light event detection mode. When an external voltage and light are applied to the optoelectronic device at the same time, it operates in photosynaptic mode. At the same time, the detection module (102) operates in voltage event detection mode.

2. The dual-mode event triggering circuit based on photodetection and photosynapse according to claim 1, characterized in that, In the illumination event detection mode, an external voltage should be continuously applied to the optoelectronic device; correspondingly, in the voltage event detection mode, continuous illumination should be applied to the optoelectronic device.

3. The dual-mode event triggering circuit based on photodetection and photosynapse according to claim 1, characterized in that, The detection module (101) includes two identical optoelectronic devices S1 and S2 that integrate photodetection and photosynaptic functions, and the optoelectronic devices S1 and S2 are connected in series. Among them, the top of the optoelectronic device S1 is connected to the input voltage V. dd ; The bottom end of photoelectric device S1 is connected to the top end of photoelectric device S2, and the common end of both serves as the output end of the detection module (101) for outputting a current signal I. R To the detection module (102); The bottom of the optoelectronic device S2 is grounded.

4. The dual-mode event triggering circuit based on photodetection and photosynapse according to claim 3, characterized in that, The input voltage V dd It is an adjustable voltage source with a voltage variation range of 0V-1V.

5. The dual-mode event triggering circuit based on photodetection and photosynapse according to claim 3, characterized in that, The optoelectronic devices S1 and S2 are passive electronic devices, and their specific structure is a double-ended structure, which includes a bottom electrode, an intermediate functional layer and a top electrode from bottom to top; the intermediate functional layer includes a heterojunction composed of two oxides.

6. The dual-mode event triggering circuit based on photodetection and photosynapse according to claim 3, characterized in that, The detection module (102) includes a detection resistor R. One end of the detection resistor R is connected to the bottom end of the optoelectronic device S1 and the top end of the optoelectronic device S2. The other end of the detection resistor R is grounded.

7. The dual-mode event triggering circuit based on photodetection and photosynapse according to claim 6, characterized in that, The resistance value of the detection resistor R should be much smaller than the minimum resistance exhibited by the optoelectronic devices S1 and S2 in photodetector or photosynapse mode.

8. An electronic detection system, characterized in that, The electronic detection system integrates the dual-mode event triggering circuit based on photodetection and photosynapse as described in any one of claims 1-7.

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