Method and circuit for improving thrust of operational amplifier

Abstract

The present invention relates to a method and circuit for improving the thrust of an operational amplifier, comprising: arranging at least two operational amplifiers on a driving chip, each of the operational amplifiers comprising a first-stage amplifier and an output stage; arranging a multiplexer between the first-stage amplifier and the output stage of each of the operational amplifiers; configuring the multiplexer so that the multiplexer can selectively receive a signal from the first-stage amplifier of any of the operational amplifiers; executing a corresponding panel operation according to the resolution requirements of an electronic paper panel, and controlling the first-stage amplifier according to the executed panel operation; and connecting the pins of the driving chip to connect the outputs of a plurality of the operational amplifiers in parallel. The present invention can avoid introducing additional current and reduce power consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of operational amplifiers, and in particular to a method and a circuit for improving the thrust of an operational amplifier. Background Art

[0002] In modern electronic paper display technology, the operational amplifier (OP) is one of the key components for driving the electronic paper panel, and its performance directly affects the display effect and the power consumption of the overall system. However, in traditional driver chip design, each operational amplifier usually works independently and cannot fully exert its thrust potential, especially when dealing with electronic paper panels of different resolutions. In addition, due to the inherent input offset voltage differences between operational amplifiers, when multiple operational amplifiers are used in parallel, additional current problems may be introduced, resulting in increased power consumption and poor display effects. Summary of the invention

[0003] The main purpose of the present invention is to provide a method and a circuit for improving the thrust of an operational amplifier, thereby avoiding the introduction of additional current and reducing power consumption.

[0004] To achieve the above object, the present invention provides a method for improving the thrust of an operational amplifier, comprising:

[0005] At least two operational amplifiers are arranged on the driver chip, each of the operational amplifiers comprising a first stage amplifier and an output stage;

[0006] A multiplexer is provided between the first stage amplifier and the output stage of each of the operational amplifiers;

[0007] By configuring the multiplexer, the multiplexer is enabled to selectively receive a signal from the first stage amplifier of any of the operational amplifiers;

[0008] According to the resolution requirement of the electronic paper panel, the corresponding panel operation is performed, and the first-stage amplifier is controlled according to the performed panel operation;

[0009] The outputs of a plurality of operational amplifiers are connected in parallel by connecting the pins of the driving chip.

[0010] Further, configuring the multiplexer so that the multiplexer can selectively receive a signal from the first-stage amplifier of any of the operational amplifiers comprises:

[0011] Sampling the first-stage amplifier output signal of each of the operational amplifiers to obtain a signal strength value;

[0012] comparing the acquired signal strength value with a preset threshold value, and assigning a priority to each first-stage amplifier according to the comparison result;

[0013] generating a selection control signal for the multiplexer based on the assigned priority, and sending the selection control signal to the multiplexer;

[0014] According to the received selection control signal, controlling the multiplexer to selectively connect the corresponding first-stage amplifier output to the output stage;

[0015] The current selection state is recorded and stored in the internal register of the multiplexer.

[0016] Further, the performing corresponding panel operation according to the resolution requirement of the electronic paper panel, and controlling the first-stage amplifier according to the performed panel operation, and shutting down the first-stage amplifier that is not selected, includes:

[0017] According to the resolution requirement, the electronic paper panel is judged according to the preset standard resolution. When the electronic paper panel is a low-resolution panel lower than the preset standard resolution, the output of a single operational amplifier is used to drive the electronic paper panel, and the first-stage amplifier that is not selected is turned off.

[0018] Furthermore, the method of performing corresponding panel operations according to the resolution requirement of the electronic paper panel and shutting down the first-stage amplifier that is not selected also includes:

[0019] According to the resolution requirement, the electronic paper panel is judged according to a preset standard resolution, and when the electronic paper panel is a high-resolution panel higher than the preset standard resolution, the following steps are performed:

[0020] Step a1: connecting a plurality of output stages of the operational amplifiers in parallel;

[0021] Step a2: selecting the first-stage signal of any one of the operational amplifiers through the multiplexer;

[0022] Step a3: transmitting the selected first-stage signal to the output stages of all parallel-connected operational amplifiers;

[0023] Step a4: Make the output stages of all parallel-connected operational amplifiers operate synchronously based on the same first-stage signal;

[0024] Step a5: Turn off the first-stage amplifier that is not selected.

[0025] Furthermore, the outputs of the plurality of operational amplifiers are connected in parallel by connecting the pins of the driver chip, including:

[0026] Analyze the pins of the driver chip to obtain a pin list, and filter the pin list according to the resolution requirement of the electronic paper panel to obtain a pin subset that meets the requirement;

[0027] Perform combinatorial analysis on the pin subsets that meet the requirements to obtain multiple parallel connection schemes;

[0028] According to each parallel connection scheme, the corresponding operational amplifier output is simulated to obtain the thrust output characteristic data of each scheme;

[0029] Compare and analyze the thrust output characteristic data of each scheme to obtain the target parallel scheme;

[0030] According to the target parallel connection scheme, the corresponding pins are connected to parallel the outputs of the plurality of operational amplifiers.

[0031] The present invention also provides a circuit for improving the thrust of an operational amplifier, which is applied to any one of the above methods for improving the thrust of an operational amplifier, comprising:

[0032] A first operational amplifier driving a first pin of the chip, the first operational amplifier comprising a first-stage amplifier, a first multiplexer and a first output stage, the first-stage amplifier being connected to the first multiplexer, and the first multiplexer being connected to the first output stage;

[0033] A second operational amplifier driving a second pin of the chip, the second operational amplifier comprising a second first-stage amplifier, a second multiplexer, and a second output stage, the second first-stage amplifier being connected to the second multiplexer, and the second multiplexer being connected to the second output stage;

[0034] The first multiplexer is also connected to the second first-stage amplifier, and the second multiplexer is also connected to the first first-stage amplifier.

[0035] Furthermore, the first multiplexer is also connected to the second first-stage amplifier, and the second multiplexer is also connected to the first first-stage amplifier, including:

[0036] The first multiplexer further includes a first multiplexer and a second multiplexer, and the second multiplexer further includes a third multiplexer and a fourth multiplexer;

[0037] The input end of the first multiplexer is connected to the second first-stage amplifier and the third multiplexer respectively, and the output end of the first multiplexer is connected to the positive polarity output of the first output stage;

[0038] The input end of the second multiplexer is connected to the second first-stage amplifier and the fourth multiplexer respectively, and the output end of the second multiplexer is connected to the negative polarity output of the first output stage;

[0039] An input end of the third multiplexer is connected to the first-stage amplifier, and an output end of the third multiplexer is connected to the positive polarity output of the second output stage;

[0040] An input end of the fourth multiplexer is connected to the first-stage amplifier, and an output end of the fourth multiplexer is connected to the negative polarity output of the second output stage.

[0041] The present invention provides the following beneficial effects:

[0042] By setting a multiplexer in the driver chip, the operating mode of the operational amplifier can be flexibly configured according to the requirements of electronic paper panels with different resolutions, so that different resolution panels can be adapted without replacing different driver chips, which greatly improves the convenience and flexibility of use. The multiplexer selectively receives signals to ensure that even if there are differences in input offset voltages between multiple operational amplifiers, consistent outputs can be achieved by adjusting the signal path, thereby overcoming the inherent different input offset voltage characteristics of the operational amplifier. By connecting the outputs of multiple operational amplifiers in parallel, not only the thrust is increased, but also the additional current caused by the difference in input offset voltage can be reduced, thereby reducing power consumption, making it more power-saving when using the same number of operational amplifiers. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 The present invention provides a flowchart of a method for improving the thrust of an operational amplifier;

[0044] Figure 2 The present invention provides a second flow chart of a method for improving the thrust of an operational amplifier;

[0045] Figure 3 The present invention provides a circuit structure diagram for improving the thrust of an operational amplifier.

[0046] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0048] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0049] See attached Figure 1 As shown, the present invention provides a method for improving the thrust of an operational amplifier, comprising:

[0050] Step S1: at least two operational amplifiers are provided on the driver chip, each operational amplifier comprising a first stage amplifier and an output stage;

[0051] Step S2: a multiplexer is provided between the first amplifier stage and the output stage of each operational amplifier;

[0052] Step S3: configuring the multiplexer so that the multiplexer can selectively receive a signal from the first-stage amplifier of any operational amplifier;

[0053] Step S4: executing corresponding panel operation according to the resolution requirement of the electronic paper panel, and controlling the first-stage amplifier according to the executed panel operation;

[0054] Step S5: connecting the pins of the driver chip to connect the outputs of multiple operational amplifiers in parallel.

[0055] Based on the above steps, the detailed process is as follows:

[0056] Step S1: at least two operational amplifiers are arranged on the driver chip, each operational amplifier comprises a first-stage amplifier and an output stage, the first-stage amplifier is responsible for amplifying the primary signal, and the output stage is responsible for driving and outputting the final signal.

[0057] Step S2: Select a suitable multiplexer that can selectively connect different signal sources. Insert the multiplexer between the first amplifier and the output stage of each operational amplifier. Each multiplexer should have multiple input ports (corresponding to the outputs of multiple first amplifiers) and one output port (connected to the output stage).

[0058] The multiplexer is configured to receive a signal from the first amplifier stage of either operational amplifier and selectively pass that signal to the output stage.

[0059] Step S3: The control signal is generated by the driving chip or the external controller.

[0060] According to different operation requirements, the multiplexer selection logic is set so that the multiplexer can selectively receive signals from the first stage amplifiers of different operational amplifiers.

[0061] By changing the control signal, the output signals of the first-stage amplifiers of different operational amplifiers are dynamically selected and transmitted to the corresponding output stages.

[0062] Step S4: executing corresponding panel operations according to the resolution requirements of the electronic paper panel, and controlling the first-stage amplifier according to the executed panel operations.

[0063] Step S5: Connect the output terminals of multiple operational amplifiers in parallel through the pins of the driver chip, and ensure that the connected pins can withstand the current and signal strength after parallel connection.

[0064] When connecting in parallel, consider load balancing and ensure that the load resistance of each op amp output is matched to prevent signal distortion or overload.

[0065] By connecting the outputs of multiple operational amplifiers in parallel, a stronger output signal is synthesized, which improves the overall driving capability and thus improves the thrust of the operational amplifier.

[0066] The present invention provides a method for improving the thrust of an operational amplifier. By setting a multiplexer in a driver chip, the operating mode of the operational amplifier can be flexibly configured according to the requirements of electronic paper panels with different resolutions, so that panels with different resolutions can be adapted without replacing different driver chips, greatly improving the convenience and flexibility of use. Through the selective reception of signals by the multiplexer, it is ensured that even if there is an input offset voltage difference between multiple operational amplifiers, a consistent output can be achieved by adjusting the signal path, thereby overcoming the inherent different input offset voltage characteristics of the operational amplifier. By connecting the outputs of multiple operational amplifiers in parallel, not only the thrust is increased, but also the additional current caused by the input offset voltage difference can be reduced, thereby reducing power consumption, making it more power-saving when the same number of operational amplifiers are used.

[0067] In one embodiment, the multiplexer is configured to selectively receive a signal from a first-stage amplifier of any operational amplifier, including:

[0068] Initialize each operational amplifier and its first-stage amplifier, initialize the control circuit of the multiplexer, and set the signal strength preset threshold.

[0069] The first stage amplifier output signal of each operational amplifier is sampled, and the signal strength value is acquired and stored in the associated memory location.

[0070] The signal strength value of each first-stage amplifier is compared with a preset threshold.

[0071] According to the comparison result, a priority is assigned to each first-stage amplifier. The setting of the priority can be based on the magnitude of the signal strength value. The higher the signal strength value, the higher the priority.

[0072] Based on the assigned priorities, a selection control signal for the multiplexer is generated.

[0073] The selection control signal may be a coded signal indicating which output of the first stage amplifier should be connected to the output of the multiplexer.

[0074] The generated selection control signal is sent to the multiplexer.

[0075] According to the received selection control signal, the multiplexer is controlled to selectively connect the corresponding first-stage amplifier output to the output stage.

[0076] Record the current selection state of the multiplexer and store the selection state in the internal register of the multiplexer for subsequent operation or diagnosis.

[0077] This embodiment samples and compares the output signal of the first-stage amplifier of each operational amplifier, assigns priorities to each amplifier according to the signal strength, and ensures that the multiplexer always selects the path with the best signal quality. This can improve the signal output quality of the system and reduce noise and distortion. The multiplexer dynamically selects the optimal first-stage amplifier output signal based on the real-time sampling and priority allocation results. This dynamic adjustment mechanism allows the system to flexibly respond to different input signal conditions and environmental changes without manual intervention or hardware replacement, significantly improving the adaptability and flexibility of the system. By intelligently selecting the signal path, the multiplexer can avoid unnecessary power consumption paths, thereby reducing the overall power consumption of the system. This is particularly important when dealing with multiple operational amplifiers, which can extend the service life of the equipment and improve energy efficiency.

[0078] In one embodiment, according to the resolution requirement of the electronic paper panel, a corresponding panel operation is performed, and the first-stage amplifier is controlled according to the performed panel operation to turn off the unselected first-stage amplifier, including:

[0079] Obtain the resolution requirement of the electronic paper panel. This step can be completed through user input, system settings or automatic detection.

[0080] The current resolution of the electronic paper panel is determined according to a preset standard resolution (eg, 300 PPI). If the actual resolution of the electronic paper panel is lower than the preset standard resolution, it is determined to be a low-resolution panel.

[0081] According to the result of the resolution judgment, the corresponding panel operation method is selected. For a low-resolution panel, the output of a single operational amplifier is selected for driving.

[0082] Controls the state of the first stage amplifier. For low resolution panels, enables a single op amp and turns off other unselected first stage amplifiers.

[0083] The electronic paper panel is driven by the output signal of the selected single operational amplifier, the unselected first-stage amplifier is turned off, and it is monitored whether the unselected amplifier is in a completely turned-off state. When it is not in a completely turned-off state, the unselected amplifier is turned off again.

[0084] Check the display status of the electronic paper panel and confirm that all unselected amplifiers are turned off and the system is in optimal working condition.

[0085] This embodiment can significantly reduce the power consumption of the system, save resources, and extend the battery life of the device by using only a single operational amplifier to drive the panel when the resolution of the electronic paper panel is lower than the preset standard resolution, and turning off other unselected amplifiers. By turning off the unselected first-stage amplifier, the circuit design is simplified, making the circuit simpler and more reliable. This reduces redundant components in the circuit, reduces the risk of potential failures, and improves the overall stability and reliability of the system. By flexibly adjusting the use status of the operational amplifier according to the requirements of different resolutions, the same hardware configuration can be adapted to electronic paper panels with different resolutions, enhancing the adaptability and versatility of the device and reducing design and production costs.

[0086] Reference Figure 2 As shown, in one embodiment, according to the resolution requirement of the electronic paper panel, the corresponding panel operation is performed, the unselected first-stage amplifier is turned off, and the method further includes:

[0087] According to the resolution requirement, the electronic paper panel is judged according to the preset standard resolution. When the electronic paper panel is a high-resolution panel higher than the preset standard resolution, the following steps are performed:

[0088] Step a1: Determine the number of operational amplifiers that need to be connected in parallel, and connect the output stages of each operational amplifier in parallel.

[0089] Step a2: Confirm that the number of input ports of the multiplexer is consistent with the number of operational amplifiers, use the multiplexer to select the first-stage signal of an operational amplifier as the input signal, and confirm that the first-stage signal of the selected operational amplifier has been correctly selected and imported.

[0090] Step a3: Confirm the signal transmission path from the multiplexer output to the output stages of all parallel operational amplifiers, pass the selected first-stage signal to the output stages of all parallel operational amplifiers, and ensure that the output stages of all parallel operational amplifiers receive the same first-stage signal.

[0091] Step a4: Confirm that the output stages of all parallel operational amplifiers have received the same first-stage signal, and check and ensure that the output stages of all parallel operational amplifiers are operating synchronously based on the same first-stage signal.

[0092] Step a5: confirm which first-stage amplifiers are not selected, turn off all the first-stage amplifiers that are not selected, and confirm that the first-stage amplifiers that are not selected have been successfully turned off.

[0093] This embodiment judges the electronic paper panel according to the preset standard resolution and performs corresponding operations according to the resolution requirements, so that the system can flexibly adapt to panels with different resolutions. It can adapt to high-resolution panels without replacing or upgrading hardware, which improves the adaptability and scalability of the system. By connecting the output stages of multiple operational amplifiers in parallel and selecting the first-stage signal of one of the operational amplifiers as the input signal of all amplifiers, the existing operational amplifier resources can be effectively utilized. This method not only improves the overall performance of the system, but also avoids the waste of resources. The first-stage signal is selected and transmitted to the output stage of all parallel operational amplifiers by the multiplexer, so that the output stages of all parallel amplifiers work synchronously based on the same input signal. This operation ensures the consistency and stability of the output signal, and even if there is a difference in input offset voltage, consistent output can be achieved through this synchronization mechanism. By turning off the first-stage amplifier that is not selected, power consumption can be effectively reduced. This strategy of selectively turning off unused amplifiers not only saves electricity, but also reduces unnecessary heat generation, making the system more efficient and environmentally friendly.

[0094] In one embodiment, the outputs of multiple operational amplifiers are connected in parallel by connecting the pins of the driver chip, including:

[0095] The pins of the driver chip are analyzed to obtain a pin list, and the pin list is screened according to the resolution requirements of the electronic paper panel to obtain a pin subset that meets the requirements.

[0096] Perform combinatorial analysis on the pin subsets that meet the requirements and obtain multiple parallel connection schemes.

[0097] According to each parallel scheme, the corresponding operational amplifier output is simulated to obtain the thrust output characteristic data of each scheme.

[0098] The thrust output characteristic data of each scheme are compared and analyzed to obtain the target parallel scheme.

[0099] According to the target parallel connection scheme, connect the corresponding pins to parallel the outputs of multiple operational amplifiers.

[0100] This embodiment ensures that the selected pins can meet the resolution requirements of the electronic paper panel through detailed analysis and screening of the driver chip pins, thereby optimizing the overall performance of the system. By combining and analyzing the subset of pins that meet the requirements and simulating each solution, the best parallel solution can be quickly determined, reducing trial and error and debugging time and improving work efficiency. The thrust output characteristic data is obtained through simulation and compared and analyzed to ensure that the selected parallel solution has stable and reliable output characteristics in practical applications, thereby improving the reliability of the system. Optimizing the connection of pins according to the target parallel solution can make full use of the resources of the driver chip, avoid unnecessary waste of resources, and maximize resource utilization.

[0101] Reference Figure 3 As shown, the present invention also provides a circuit with improved operational amplifier thrust, which is applied to any of the above methods for improving operational amplifier thrust, comprising:

[0102] A first operational amplifier of a first pin (PIN1) of a driving chip, wherein the first operational amplifier comprises a first-stage amplifier (P1), a first multiplexer and a first output stage (NO1), wherein the first-stage amplifier (P1) is connected to the first multiplexer, and the first multiplexer is connected to the first output stage (NO1);

[0103] A second operational amplifier of the second pin (PIN2) of the driving chip, the second operational amplifier comprises a second first-stage amplifier (P2), a second multiplexer and a second output stage (NO2), the second first-stage amplifier is connected to the second multiplexer, and the second multiplexer is connected to the second output stage (NO2);

[0104] The first multiplexer is also connected to the second first-stage amplifier (P2), and the second multiplexer is also connected to the first first-stage amplifier (P1).

[0105] The present invention provides a circuit with improved operational amplifier thrust. By setting a multiplexer in a driver chip, the operating mode of the operational amplifier can be flexibly configured according to the requirements of electronic paper panels with different resolutions, so that panels with different resolutions can be adapted without replacing different driver chips, greatly improving the convenience and flexibility of use. Through the selective reception signal of the multiplexer, it is ensured that even if there is an input offset voltage difference between multiple operational amplifiers, a consistent output can be achieved by adjusting the signal path, thereby overcoming the inherent different input offset voltage characteristics of the operational amplifier. By connecting the outputs of multiple operational amplifiers in parallel, not only the thrust is increased, but also the additional current caused by the input offset voltage difference can be reduced, thereby reducing power consumption, making it more power-saving when using the same number of operational amplifiers.

[0106] Reference Figure 3 As shown, in one embodiment, the first multiplexer is further connected to the second first stage amplifier, and the second multiplexer is further connected to the first first stage amplifier, including:

[0107] The first multiplexer further includes a first multiplexer (M1) and a second multiplexer (M2), and the second multiplexer further includes a third multiplexer (M3) and a fourth multiplexer (M4);

[0108] The input end of the first multiplexer (M1) is connected to the second first stage amplifier (P2) and the third multiplexer (M3) respectively, and the output end of the first multiplexer (M1) is connected to the positive polarity output of the first output stage (NO1);

[0109] The input end of the second multiplexer (M2) is connected to the second first-stage amplifier (P2) and the fourth multiplexer (M4) respectively, and the output end of the second multiplexer (M2) is connected to the negative polarity output of the first output stage (NO1);

[0110] The input end of the third multiplexer (M3) is connected to the first stage amplifier (P1), and the output end of the third multiplexer (M3) is connected to the positive polarity output of the second output stage (NO2);

[0111] The input end of the fourth multiplexer (M4) is connected to the first stage amplifier (P1), and the output end of the fourth multiplexer (M4) is connected to the negative polarity output of the second output stage (NO2).

[0112] This embodiment realizes the parallel output of multiple operational amplifiers through the setting of the first multiplexer and the second multiplexer, and enhances the overall output thrust. This makes the circuit perform better when driving high loads and can meet the needs of higher resolution electronic paper panels. Due to the flexible configuration of the multiplexer, the operating mode of the operational amplifier can be adjusted according to the needs of electronic paper panels with different resolutions, so there is no need to replace different driver chips. This greatly improves the convenience and flexibility of use and adapts to the requirements of different application scenarios. By selectively receiving and processing signals through the multiplexer, it is ensured that even if there is an input offset voltage difference between multiple operational amplifiers, consistent output can be achieved by adjusting the signal path. This overcomes the inherent input offset voltage characteristic difference of the operational amplifier and ensures the consistency and stability of the circuit output. By connecting the outputs of multiple operational amplifiers in parallel, not only the thrust is increased, but also the additional current caused by the input offset voltage difference can be reduced, thereby reducing the overall power consumption of the circuit. When using the same number of operational amplifiers, a more power-saving effect can be achieved, extending the service life of the device.

[0113] It should be noted that technicians in the relevant technical field can clearly understand that for the convenience and conciseness of description, the specific working process of the system and each module described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0114] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for improving the thrust of an operational amplifier, characterized in that: include: At least two operational amplifiers are arranged on the driver chip, each of the operational amplifiers comprising a first stage amplifier and an output stage; A multiplexer is provided between the first stage amplifier and the output stage of each of the operational amplifiers; By configuring the multiplexer, the multiplexer is enabled to selectively receive a signal from the first stage amplifier of any of the operational amplifiers; According to the resolution requirement of the electronic paper panel, the corresponding panel operation is performed, and the first-stage amplifier is controlled according to the performed panel operation; The outputs of a plurality of operational amplifiers are connected in parallel by connecting the pins of the driver chip; The configuring the multiplexer so that the multiplexer can selectively receive the signal from the first-stage amplifier of any of the operational amplifiers comprises: Sampling the first-stage amplifier output signal of each of the operational amplifiers to obtain a signal strength value; comparing the acquired signal strength value with a preset threshold value, and assigning a priority to each first-stage amplifier according to the comparison result; generating a selection control signal for the multiplexer based on the assigned priority, and sending the selection control signal to the multiplexer; According to the received selection control signal, controlling the multiplexer to selectively connect the corresponding first-stage amplifier output to the output stage; Recording the current selection state and storing it in the internal register of the multiplexer; The method of performing corresponding panel operations according to the resolution requirements of the electronic paper panel, and controlling the first-stage amplifiers according to the performed panel operations, and shutting down the first-stage amplifiers that are not selected, includes: According to the resolution requirement, the electronic paper panel is judged according to the preset standard resolution. When the electronic paper panel is a low-resolution panel lower than the preset standard resolution, the output of a single operational amplifier is used to drive the electronic paper panel, and the first-stage amplifier that is not selected is turned off.

2. The method for improving the thrust of an operational amplifier according to claim 1, characterized in that: The method of performing corresponding panel operations according to the resolution requirement of the electronic paper panel and shutting down the first-stage amplifiers that are not selected further includes: According to the resolution requirement, the electronic paper panel is judged according to a preset standard resolution, and when the electronic paper panel is a high-resolution panel higher than the preset standard resolution, the following steps are performed: Step a1: connecting a plurality of output stages of the operational amplifiers in parallel; Step a2: selecting the signal of the first-stage amplifier of any one of the operational amplifiers through the multiplexer; Step a3: transmitting the selected signal of the first-stage amplifier to the output stages of all parallel-connected operational amplifiers; Step a4: making the output stages of all parallel operational amplifiers operate synchronously based on the same signal of the first stage amplifier; Step a5: Turn off the first-stage amplifier that is not selected.

3. The method for improving the thrust of an operational amplifier according to claim 1, characterized in that: The method of connecting the pins of the driving chip to connect the outputs of the plurality of operational amplifiers in parallel comprises: Analyze the pins of the driver chip to obtain a pin list, and filter the pin list according to the resolution requirement of the electronic paper panel to obtain a pin subset that meets the requirement; Perform combinatorial analysis on the pin subsets that meet the requirements to obtain multiple parallel connection schemes; According to each parallel connection scheme, the corresponding operational amplifier output is simulated to obtain the thrust output characteristic data of each scheme; Compare and analyze the thrust output characteristic data of each scheme to obtain the target parallel scheme; According to the target parallel connection scheme, the corresponding pins are connected to parallel the outputs of the plurality of operational amplifiers.

4. A circuit for improving the thrust of an operational amplifier, characterized in that: The method for improving the thrust of an operational amplifier as applied to any one of claims 1 to 3 above comprises: A first operational amplifier driving a first pin of the chip, the first operational amplifier comprising a first-stage amplifier, a first multiplexer and a first output stage, the first-stage amplifier being connected to the first multiplexer, and the first multiplexer being connected to the first output stage; A second operational amplifier driving a second pin of the chip, the second operational amplifier comprising a second first-stage amplifier, a second multiplexer, and a second output stage, the second first-stage amplifier being connected to the second multiplexer, and the second multiplexer being connected to the second output stage; The first multiplexer is also connected to the second first-stage amplifier, and the second multiplexer is also connected to the first first-stage amplifier.

5. The circuit with improved operational amplifier thrust according to claim 4, characterized in that: The first multiplexer is also connected to the second first-stage amplifier, and the second multiplexer is also connected to the first first-stage amplifier, including: The first multiplexer further includes a first multiplexer and a second multiplexer, and the second multiplexer further includes a third multiplexer and a fourth multiplexer; The input end of the first multiplexer is connected to the second first-stage amplifier and the third multiplexer respectively, and the output end of the first multiplexer is connected to the positive polarity output of the first output stage; The input end of the second multiplexer is connected to the second first-stage amplifier and the fourth multiplexer respectively, and the output end of the second multiplexer is connected to the negative polarity output of the first output stage; An input end of the third multiplexer is connected to the first-stage amplifier, and an output end of the third multiplexer is connected to the positive polarity output of the second output stage; An input end of the fourth multiplexer is connected to the first-stage amplifier, and an output end of the fourth multiplexer is connected to the negative polarity output of the second output stage.

Images