Endoscope multiplexing line built-in MIPI-CSI signal long-distance transmission isolation enhancement device

Abstract

The present application relates to electronic endoscope technical field, specifically, it relates to a kind of endoscope multiplexing line built-in MIPI-CSI signal long-distance transmission isolation enhancement device.It includes the control end module, receiving end module and power management unit integrated in multiplexing line, and power management unit is used to power control end module, receiving end module.Power management unit in the present application, by the high integration of control end module, receiving end module and power management unit in multiplexing line, signal conditioning and isolation enhancement unit of control end can effectively process original signal and inhibit common-mode interference, then with the equalization compensation and clock data recovery circuit of receiving end repair signal attenuation and timing distortion problem caused by long-distance transmission, to realize in complex electromagnetic environment still can stable output low jitter, high integrity video signal, fundamentally solve the problem of affecting diagnostic accuracy due to image delay, quality decline.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic endoscopes, in particular to an endoscope multiplexing line built-in MIPI-CSI signal long-distance transmission isolation enhancement device. BACKGROUND

[0002] An electronic endoscope is a medical electronic optical instrument that can be inserted into a body cavity for direct observation and diagnosis, which is composed of an endoscope, a television information system center and a television monitor. It uses a CCD sensor to replace optical fibers and converts images into electrical signals on the screen, with high resolution and thin tube diameter. The core components include a cold light source illumination system and a video processing system, which are clinically used in gastroscopy, colonoscopy and nasopharyngolaryngoscopy.

[0003] However, the signal transmission length of the existing electronic endoscope is limited by the inherent protocol and physical characteristics, and it is often difficult to meet the needs of long-distance clinical operation. In actual application scenarios, as the complexity of the examination environment and the diversity of equipment layout increase, the demand for stable long-distance signal transmission is increasingly urgent. In addition, due to cost control factors, the insertion part cannot be directly integrated with signal processing chips, which makes it a mainstream application scheme to use multiplexing lines as signal relays and enhancement carriers.

[0004] However, the current multiplexing line has a limited signal transmission length, that is, the inherent characteristics of the physical transmission medium cause the signal to inevitably attenuate with distance, with high-frequency components being particularly susceptible to loss, resulting in blurred image details and color distortion. In addition, complex clinical electromagnetic environments can introduce various types of noise interference, and the multiplexing line, as a non-shielded or lightly shielded flexible cable, is easily used as a receiving antenna, further degrading signal quality, reducing signal-to-noise ratio, and leading to decreased image quality and increased delay, directly affecting the accuracy of diagnosis and the continuity of operation. SUMMARY

[0005] The purpose of the present application is to solve the problem of limited signal transmission length caused by signal attenuation with distance in existing electronic endoscopes and multiplexing lines.

[0006] The purpose of the present application is to provide an endoscope multiplexing line built-in MIPI-CSI signal long-distance transmission isolation enhancement device, which realizes effective signal extension by building a signal isolation enhancement device in the multiplexing line, breaks through the existing transmission distance limit while ensuring operation convenience and system compatibility without significantly increasing costs.

[0007] In order to achieve the above-mentioned purpose, the present application aims to provide an endoscope multiplexing line built-in MIPI-CSI signal long-distance transmission isolation enhancement device, comprising a control end module, a receiving end module and a power management unit integrated in the multiplexing line, the power management unit is used for power supply of the control end module and the receiving end module;

[0008] The control end module is located at the equipment end of the multiplexing line, and comprises a signal conditioning unit and an isolation enhancement unit, the signal conditioning unit is used for receiving and arranging original signals from the endoscope insertion part, and the isolation enhancement unit is used for coupling signals while suppressing common mode interference;

[0009] The receiving end module is located at the host end of the multiplexing line, and comprises a signal recovery unit and a signal output unit, the signal recovery unit is used for receiving enhanced signals, and the signal output unit is used for outputting signals to a video processing system;

[0010] The signal conditioning unit is connected with the isolation enhancement unit, the isolation enhancement unit is connected with the signal recovery unit through a cable, and the signal recovery unit is connected with the signal output unit;

[0011] The original signals received by the signal conditioning unit are processed, then coupled and suppressed by the isolation enhancement unit, and then output to the signal recovery unit through the cable, the signal recovery unit performs recovery processing on the signals, and then outputs the signals to the video processing system through the signal output unit.

[0012] As a further improvement of the technical solution, the signal conditioning unit comprises a signal receiving module and a signal arrangement module, the signal receiving module is used for receiving original signals from the endoscope insertion part and transmitting the original signals to the signal arrangement module, the signal arrangement module performs filtering and amplification processing on the original signals, and then transmits the signals to the isolation enhancement unit.

[0013] As a further improvement of the technical solution, the signal arrangement module comprises operational amplifiers IC1, IC2 and IC3;

[0014] The inverting input end of the operational amplifier IC1 is connected with resistors R1 and R4;

[0015] The non-inverting input end of the operational amplifier IC1 is connected with resistors R2 and R3, the resistors R1 and R2 are connected with the signal receiving module, and the resistor R3 is grounded;

[0016] The output end of the operational amplifier IC1 is connected with a resistor R5 and the other end of the resistor R4;

[0017] The non-inverting input terminal of the operational amplifier IC2 is connected to capacitor C11 and resistor R6. Capacitor C11 is grounded, and resistor R6 is connected to capacitor C10 and the other end of resistor R5.

[0018] The output terminal and the inverting input terminal of the operational amplifier IC2 are both connected to resistor R7 and the other end of capacitor C10.

[0019] The non-inverting input terminal of the operational amplifier IC3 is connected to resistor R8, and resistor R8 is grounded.

[0020] The inverting input terminal of the operational amplifier IC3 is connected to resistor R9 and the other end of resistor R7;

[0021] The output terminal of the operational amplifier IC3 is connected to the other end of the resistor R9.

[0022] As a further improvement to this technical solution, the isolation enhancement unit includes an optical coupling circuit and a signal enhancement circuit connected to the optical coupling circuit.

[0023] As a further improvement to this technical solution, the signal enhancement circuit includes transistors Q1, Q2, and Q3;

[0024] The base of transistor Q1 is connected to resistors R12 and R13 and capacitor C1 in parallel. Capacitor C1 is connected to resistor R11 and input terminal. Input terminal is connected to resistors R14, R15, R16, R19, R21, and R22. Capacitor C4 is connected to the other end of resistor R11 and the other end of resistor R13.

[0025] The collector of transistor Q1 is connected to potentiometer RP2, resistors R18 and R20, the collector of transistor Q3, and the other end of resistor R12 is connected in parallel to VCC.

[0026] The emitter of the transistor Q1 is connected to capacitor C2 and the other end of resistor R14. Capacitor C2 is connected to potentiometer RP1 and the other end of resistor R15.

[0027] The base of the transistor Q2 is connected to the other end of the resistor R18, the other end of the resistor R19 is connected to the other end of the capacitor C4;

[0028] The collector of the transistor Q2 is connected to resistor R17 and capacitor C5, and resistor R17 is connected to potentiometer RP2.

[0029] The emitter of the transistor Q2 is connected to the potentiometer RP1, the capacitor C3, and the other end of the resistor R16. The capacitor C3 is connected to the potentiometer RP1.

[0030] The base of the transistor Q3 is connected to the negative terminal of the diode D1 and to the other end of the capacitor C5. The positive terminal of the diode D1 is connected to the other end of the resistor R20 and to the other end of the resistor R21.

[0031] The emitter of transistor Q3 is connected to resistor R23 and the other end of resistor R22. Resistor R23 is connected to capacitor C6, and capacitor C6 is connected to the output terminal.

[0032] As a further improvement to this technical solution, the signal recovery unit includes an equalization compensation circuit, a clock data recovery circuit, and a signal shaping circuit. The equalization compensation circuit and the clock data recovery circuit are connected by a cable, and both the equalization compensation circuit and the clock data recovery circuit are connected to the signal shaping circuit.

[0033] The equalization compensation circuit provides targeted compensation for high-frequency attenuation caused by cable transmission, thereby reshaping the signal waveform.

[0034] The clock data recovery circuit is used to accurately extract the synchronization clock from the serial signal embedded in the data, and use the clock to resample and align the data stream to eliminate timing jitter and phase offset caused by long-distance transmission.

[0035] The signal shaping circuit is used to perform threshold judgment and regeneration on the recovered signal and output a digital signal.

[0036] As a further improvement to this technical solution, the power management unit includes chip IC5, optocoupler IC6, and transformer T1;

[0037] One end of the n1 coil of the transformer T1 is connected to resistor R40 and capacitor C37 and connected to VIN terminal. The other end of the n1 coil is connected to the positive terminal of diode D12 and connected to the chip IC5. The negative terminal of diode D12 is connected to resistor R40, and capacitor C37 is grounded.

[0038] One end of the n2 coil of the transformer T1 is grounded, and the other end of the n2 coil is connected to the positive terminal of diode D13. Diode D13 is connected to the positive terminal of diode D14, capacitor C38, and in parallel to the optocoupler IC6. Capacitor C38 is grounded. The negative terminal of diode D14 is connected to resistor R44. Resistor R44 is connected to resistors R43 and R45 and in parallel to the chip IC5. Resistor R43 is connected to capacitor C39. Capacitor C39 is connected to capacitor C49 and in parallel to the chip IC5. Resistor R45 is connected to the optocoupler IC6. Capacitor C49 is grounded.

[0039] One end of the n3 coil of the transformer T1 is connected to the positive terminal of diode D16. The negative terminal of diode D16 is connected to inductor L4 and the negative terminal of diode D17, and then connected to capacitor C40. The other end of inductor L4 is connected to the negative terminal of diode D17 and inductor L5, and then connected to capacitor C43. Capacitor C40 is connected to resistor R47, and resistor R47 is connected to the positive terminal of diode D17.

[0040] One end of the n4 coil of the transformer T1 is connected to the positive terminal of the diode D15, and the other ends of the n3 coil and the n4 coil are both connected to the capacitors C44, C45, and OUT- terminal, and are also connected to the other end of the inductor L4 and the other end of the capacitor C43.

[0041] The other end of the inductor L5 is connected to the negative terminal of diode D18, and the OUT+ terminal is connected in parallel to the other end of capacitor C44 and the other end of capacitor C45. The positive terminal of diode D18 is connected to resistor R49. Resistor R49 is connected to optocoupler IC6, resistor R50, and capacitor C47 in parallel. Capacitor C47 is grounded.

[0042] In this invention, the modular design of the control module and the receiving module enables the device to effectively extend the signal transmission capability without changing the external interface and physical structure of the existing multiplex line, while maintaining excellent electromagnetic compatibility and ease of operation.

[0043] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0044] This endoscope multiplexing line incorporates a MIPI-CSI signal long-distance transmission isolation and enhancement device. By highly integrating the control module, receiver module, and power management unit inside the multiplexing line, the signal conditioning and isolation enhancement unit at the control end can effectively process the original signal and suppress common-mode interference. Then, the equalization compensation and clock data recovery circuit at the receiver end repairs the signal attenuation and timing distortion caused by long-distance transmission. This enables stable output of low-jitter and high-integrity video signals even in complex electromagnetic environments, fundamentally solving the problem of diagnostic accuracy being affected by image delay and quality degradation. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0046] Figure 2 This is a circuit diagram of the signal conditioning module of the present invention;

[0047] Figure 3 This is a schematic diagram of the signal enhancement circuit of the present invention;

[0048] Figure 4 This is a schematic diagram of the power supply unit circuit of the present invention. Detailed Implementation

[0049] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments 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.

[0050] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0051] Please see Figures 1-4 As shown, the purpose of this embodiment is to provide an endoscope multiplexing line with a built-in MIPI-CSI signal long-distance transmission isolation enhancement device, including a control terminal module, a receiver module and a power management unit integrated inside the multiplexing line. The power management unit is used to provide stable and isolated power supply to the control terminal module and the receiver module to ensure that the enhancement function works stably in complex electromagnetic environments.

[0052] The control module is located near the equipment end of the multiplexing line. The control module includes a signal conditioning unit and an isolation enhancement unit. The signal conditioning unit is used to receive and process the raw MIPI-CSI signal from the endoscope insertion section CCD. The isolation enhancement unit is used to completely cut off the ground loop while realizing signal coupling, effectively suppressing common-mode interference and improving the signal driving capability.

[0053] The receiver module is located near the host end of the multiplexing line. The receiver module includes a signal recovery unit and a signal output unit. The signal recovery unit is used to receive the enhanced signal after it has been attenuated by a long-distance cable, and to perform equalization compensation, clock data recovery and shaping on it. The signal output unit is used to output a low-jitter, high-integrity signal that conforms to the MIPI-CSI standard to the video processing system.

[0054] The signal conditioning unit is connected to the isolation enhancement unit, the isolation enhancement unit is connected to the signal recovery unit via a cable, and the signal recovery unit is connected to the signal output unit.

[0055] The signal is received and processed by the signal conditioning unit. Then, the signal is coupled and common-mode is suppressed by the isolation enhancement unit. The isolation enhancement unit then outputs the signal to the signal recovery unit through the cable. After the signal recovery unit performs recovery processing, the signal is output to the video processing system through the signal output unit.

[0056] The signal conditioning unit includes a signal receiving module and a signal processing module. The signal receiving module receives the raw MIPI-CSI signal from the endoscope insertion section and transmits it to the signal processing module. The signal processing module filters and amplifies the raw MIPI-CSI signal before transmitting it to the isolation enhancement unit.

[0057] Specifically, the signal conditioning module includes operational amplifiers IC1, IC2, and IC3;

[0058] Resistors R1 and R4 are connected to the inverting input terminal of operational amplifier IC1;

[0059] The non-inverting input of operational amplifier IC1 is connected to resistors R2 and R3. Resistors R1 and R2 are both connected to the signal receiving module, and resistor R3 is grounded.

[0060] The output terminal of operational amplifier IC1 is connected to resistor R5 and the other end of resistor R4.

[0061] The non-inverting input of operational amplifier IC2 is connected to capacitor C11 and resistor R6. Capacitor C11 is grounded, and resistor R6 is connected to the other end of capacitor C10 and resistor R5.

[0062] The output and inverting input terminals of operational amplifier IC2 are both connected to resistor R7 and the other end of capacitor C10.

[0063] The non-inverting input of operational amplifier IC3 is connected to resistor R8, and resistor R8 is grounded.

[0064] The inverting input terminal of operational amplifier IC3 is connected to resistor R9 and the other end of resistor R7;

[0065] The output of operational amplifier IC3 is connected to the other end of resistor R9.

[0066] In the signal conditioning module of this embodiment, operational amplifiers IC1 and IC2 are preferably AD8610 type operational amplifiers, and operational amplifier IC3 is preferably AD817 type operational amplifier.

[0067] Operational amplifiers IC1 and IC2 form a two-stage amplifier circuit. Operational amplifier IC1 and its peripheral circuit components pre-amplify the signal received from the signal receiving module through resistors R1 and R2. Then, operational amplifier IC2 and its peripheral circuit components filter the signal after the first amplification to remove common-mode interference. Finally, operational amplifier IC3 and its peripheral circuit components perform low-pass filtering on high-frequency noise in the amplified signal and amplify the signal a second time.

[0068] The isolation enhancement unit includes an optical coupling circuit and a signal enhancement circuit connected to the optical coupling circuit. Signal transmission is achieved through the optical coupling circuit, which uses the photoelectric effect to transmit signals. The input and output terminals are completely electrically isolated, and the signal transmission is unidirectional and unaffected by external electromagnetic interference, ensuring the stability and reliability of signal transmission. The signal enhancement circuit enhances the signal strength through gain.

[0069] Furthermore, the signal enhancement circuit includes transistors Q1, Q2, and Q3;

[0070] The base of transistor Q1 is connected to resistors R12 and R13 and capacitor C1 in parallel. Capacitor C1 is connected to resistor R11 and input terminal. Input terminal is connected to resistors R14, R15, R16, R19, R21, and R22. Capacitor C4 is connected to the other end of resistor R11 and the other end of resistor R13 in parallel.

[0071] The collector of transistor Q1 is connected to potentiometer RP2, resistors R18 and R20, the collector of transistor Q3, and the other end of resistor R12 are connected to VCC.

[0072] The emitter of transistor Q1 is connected to capacitor C2 and the other end of resistor R14. Capacitor C2 is connected to potentiometer RP1 and the other end of resistor R15.

[0073] The base of transistor Q2 is connected to the other end of resistor R18, the other end of resistor R19, and the other end of capacitor C4.

[0074] The collector of transistor Q2 is connected to resistor R17 and capacitor C5. Resistor R17 is connected to potentiometer RP2.

[0075] The emitter of transistor Q2 is connected to potentiometer RP1, capacitor C3 is connected in parallel to the other end of resistor R16, and capacitor C3 is connected to potentiometer RP1.

[0076] The base of transistor Q3 is connected to the negative terminal of diode D1 and then to the other end of capacitor C5. The positive terminal of diode D1 is connected to the other end of resistor R20 and then to the other end of resistor R21.

[0077] The emitter of transistor Q3 is connected to resistor R23 and the other end of resistor R22. Resistor R23 is connected to capacitor C6, and capacitor C6 is connected to the output terminal.

[0078] In the circuit, transistor Q1 acts as a buffer, and resistor R1 ensures that the input impedance of the enhancement circuit is approximately 75Ω. The signal is applied to amplifying transistor Q2, and then sufficient drive current is provided by buffer transistor Q3. The signal enhancement circuit can increase the high-frequency components of the video signal, thereby enhancing image contrast and improving image quality.

[0079] The signal recovery unit includes an equalization compensation circuit, a clock data recovery circuit, and a signal shaping circuit. The equalization compensation circuit and the clock data recovery circuit are connected by a cable, and both the equalization compensation circuit and the clock data recovery circuit are connected to the signal shaping circuit.

[0080] The equalization compensation circuit adopts adaptive equalization technology, which uses an adjustable gain amplifier and filter network to compensate for the high-frequency attenuation caused by cable transmission, reshape the signal waveform, and restore the submerged signal details and amplitude.

[0081] The clock data recovery circuit incorporates a phase detector and a voltage-controlled oscillator to form a phase-locked loop structure, which is used to accurately extract the synchronous clock from the serial signal embedded with data, and use this clock to resample and align the data stream, eliminating timing jitter and phase shift caused by long-distance transmission.

[0082] The signal shaping circuit is used to perform threshold judgment and regeneration on the recovered signal, eliminate residual distortion, and finally output a clean digital signal with low jitter, high signal-to-noise ratio and conforming to the MIPI-CSI interface electrical specifications.

[0083] Furthermore, the power management unit includes chip IC5, optocoupler IC6, and transformer T1;

[0084] One end of the n1 coil of transformer T1 is connected to resistor R40 and capacitor C37 and connected to VIN terminal. The other end of the n1 coil is connected to the positive terminal of diode D12 and connected to chip IC5. The negative terminal of diode D12 is connected to resistor R40 and capacitor C37 is grounded.

[0085] One end of the n2 coil of transformer T1 is grounded, and the other end of the n2 coil is connected to the positive terminal of diode D13. Diode D13 is connected to the positive terminal of diode D14, capacitor C38, and in parallel to optocoupler IC6. Capacitor C38 is grounded. The negative terminal of diode D14 is connected to resistor R44. Resistor R44 is connected to resistors R43 and R45 and in parallel to chip IC5. Resistor R43 is connected to capacitor C39. Capacitor C39 is connected to capacitor C49 and in parallel to chip IC5. Resistor R45 is connected to optocoupler IC6. Capacitor C49 is grounded.

[0086] One end of the n3 coil of transformer T1 is connected to the positive terminal of diode D16. The negative terminal of diode D16 is connected to the negative terminals of inductor L4 and diode D17, and then connected to capacitor C40. The other end of inductor L4 is connected to the negative terminal of diode D17 and inductor L5, and then connected to capacitor C43. Capacitor C40 is connected to resistor R47, and resistor R47 is connected to the positive terminal of diode D17.

[0087] One end of the n4 coil of transformer T1 is connected to the positive terminal of diode D15. The other ends of the n3 coil and the n4 coil are connected to capacitors C44 and C45, the OUT- terminal, and the other ends of inductor L4 and capacitor C43.

[0088] The other end of inductor L5 is connected to the negative terminal of diode D18, and the OUT+ terminal is connected in parallel to the other end of capacitor C44 and the other end of capacitor C45. The positive terminal of diode D18 is connected to resistor R49. Resistor R49 is connected to optocoupler IC6, resistor R50, and in parallel to capacitor C47. Capacitor C47 is grounded.

[0089] The power management unit uses electronic components such as inductors L4 and L5 to form an LC filter circuit, and uses electronic components such as optocoupler IC6, diode D18, resistor R49, and R50 to form a voltage feedback circuit, forming a closed-loop structure to stabilize the power output voltage and ensure the stable operation of the control module and the receiving module.

[0090] In summary, this invention constructs a complete signal enhancement link by highly integrating the control module, receiver module, and power management unit within the multiplexing line. The signal conditioning and isolation enhancement unit at the control end effectively processes the original signal and suppresses common-mode interference, while the equalization compensation and clock data recovery circuit at the receiver accurately repairs signal attenuation and timing distortion caused by long-distance transmission. This solution successfully overcomes the transmission distance limitations of traditional MIPI-CSI signals, and can still stably output low-jitter, high-integrity video signals in complex electromagnetic environments, fundamentally solving the problem of diagnostic accuracy being affected by image delay and quality degradation.

[0091] Furthermore, this invention cleverly utilizes the existing structure of the multiplexing line for functional integration, eliminating the need for expensive modifications to core components such as the endoscope insertion section, significantly reducing system upgrade costs. The modular design ensures plug-and-play compatibility with existing equipment, fully maintaining the convenience of clinical operation and backward compatibility of the system, providing an economical and efficient solution for long-distance, high-reliability applications of electronic endoscopes.

[0092] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An endoscope multiplexing line with a built-in MIPI-CSI signal long-distance transmission isolation and enhancement device, comprising a control module, a receiver module, and a power management unit integrated within the multiplexing line, wherein the power management unit is used to supply power to the control module and the receiver module, characterized in that: The control module is located near the equipment end of the multiplexing line. The control module includes a signal conditioning unit and an isolation enhancement unit. The signal conditioning unit is used to receive and process the raw signal from the endoscope insertion section. The isolation enhancement unit is used to suppress common-mode interference while achieving signal coupling. The receiving module is located near the host end of the multiplexing line. The receiving module includes a signal recovery unit and a signal output unit. The signal recovery unit is used to receive the enhanced signal, and the signal output unit is used to output the signal to the video processing system. The signal conditioning unit is connected to the isolation enhancement unit, the isolation enhancement unit is connected to the signal recovery unit via a cable, and the signal recovery unit is connected to the signal output unit; After the signal conditioning unit receives and processes the original signal, the isolation enhancement unit performs signal coupling and common-mode rejection processing. Then, the isolation enhancement unit outputs the signal to the signal recovery unit through a cable. After the signal recovery unit performs recovery processing, the signal is output to the video processing system through the signal output unit. The signal conditioning unit includes a signal receiving module and a signal processing module. The signal processing module filters and amplifies the original signal before transmitting the signal to the isolation enhancement unit. The signal conditioning module includes operational amplifiers IC1, IC2, and IC3; The inverting input terminal of the operational amplifier IC1 is connected to resistors R1 and R4; The non-inverting input terminal of the operational amplifier IC1 is connected to resistors R2 and R3. Resistors R1 and R2 are both connected to the signal receiving module, and resistor R3 is grounded. The output terminal of the operational amplifier IC1 is connected to resistor R5 and the other end of resistor R4; The non-inverting input terminal of the operational amplifier IC2 is connected to capacitor C11 and resistor R6. Capacitor C11 is grounded, and resistor R6 is connected to capacitor C10 and the other end of resistor R5. The output terminal and the inverting input terminal of the operational amplifier IC2 are both connected to resistor R7 and the other end of capacitor C10. The non-inverting input terminal of the operational amplifier IC3 is connected to resistor R8, and resistor R8 is grounded. The inverting input terminal of the operational amplifier IC3 is connected to resistor R9 and the other end of resistor R7; The output terminal of the operational amplifier IC3 is connected to the other end of the resistor R9; The isolation enhancement unit includes an optical coupling circuit and a signal enhancement circuit connected to the optical coupling circuit; The signal enhancement circuit includes transistors Q1, Q2, and Q3; The base of transistor Q1 is connected to resistors R12 and R13 and capacitor C1 in parallel. Capacitor C1 is connected to resistor R11 and input terminal. Input terminal is connected to resistors R14, R15, R16, R19, R21, and R22. Capacitor C4 is connected to the other end of resistor R11 and the other end of resistor R13. The collector of transistor Q1 is connected to potentiometer RP2, resistors R18 and R20, the collector of transistor Q3, and the other end of resistor R12 is connected in parallel to VCC. The emitter of the transistor Q1 is connected to capacitor C2 and the other end of resistor R14. Capacitor C2 is connected to potentiometer RP1 and the other end of resistor R15. The base of the transistor Q2 is connected to the other end of the resistor R18, the other end of the resistor R19 is connected to the other end of the capacitor C4; The collector of the transistor Q2 is connected to resistor R17 and capacitor C5, and resistor R17 is connected to potentiometer RP2. The emitter of the transistor Q2 is connected to the potentiometer RP1, the capacitor C3, and the other end of the resistor R16. The capacitor C3 is connected to the potentiometer RP1. The base of the transistor Q3 is connected to the negative terminal of the diode D1 and to the other end of the capacitor C5. The positive terminal of the diode D1 is connected to the other end of the resistor R20 and to the other end of the resistor R21. The emitter of transistor Q3 is connected to resistor R23 and the other end of resistor R22. Resistor R23 is connected to capacitor C6, and capacitor C6 is connected to the output terminal.

2. The endoscope multiplexing cable with built-in MIPI-CSI signal long-distance transmission isolation and enhancement device according to claim 1, characterized in that: The signal receiving module is used to receive the raw signal from the endoscope insertion section and transmit it to the signal processing module.

3. The endoscope multiplexing cable with built-in MIPI-CSI signal long-distance transmission isolation and enhancement device according to claim 1, characterized in that: The signal recovery unit includes an equalization compensation circuit, a clock data recovery circuit, and a signal shaping circuit. The equalization compensation circuit and the clock data recovery circuit are connected by a cable, and both the equalization compensation circuit and the clock data recovery circuit are connected to the signal shaping circuit. The equalization compensation circuit provides targeted compensation for high-frequency attenuation caused by cable transmission, thereby reshaping the signal waveform. The clock data recovery circuit is used to accurately extract the synchronization clock from the serial signal embedded in the data, and use the clock to resample and align the data stream to eliminate timing jitter and phase offset caused by long-distance transmission. The signal shaping circuit is used to perform threshold judgment and regeneration on the recovered signal and output a digital signal.

4. The endoscope multiplexing cable with built-in MIPI-CSI signal long-distance transmission isolation and enhancement device according to claim 1, characterized in that: The power management unit includes chip IC5, optocoupler IC6, and transformer T1; One end of the n1 coil of the transformer T1 is connected to resistor R40 and capacitor C37 and connected to VIN terminal. The other end of the n1 coil is connected to the positive terminal of diode D12 and connected to the chip IC5. The negative terminal of diode D12 is connected to resistor R40, and capacitor C37 is grounded. One end of the n2 coil of the transformer T1 is grounded, and the other end of the n2 coil is connected to the positive terminal of diode D13. Diode D13 is connected to the positive terminal of diode D14, capacitor C38, and in parallel to the optocoupler IC6. Capacitor C38 is grounded. The negative terminal of diode D14 is connected to resistor R44. Resistor R44 is connected to resistors R43 and R45 and in parallel to the chip IC5. Resistor R43 is connected to capacitor C39. Capacitor C39 is connected to capacitor C49 and in parallel to the chip IC5. Resistor R45 is connected to the optocoupler IC6. Capacitor C49 is grounded. One end of the n3 coil of the transformer T1 is connected to the positive terminal of diode D16. The negative terminal of diode D16 is connected to inductor L4 and the negative terminal of diode D17, and then connected to capacitor C40. The other end of inductor L4 is connected to the negative terminal of diode D17 and inductor L5, and then connected to capacitor C43. Capacitor C40 is connected to resistor R47, and resistor R47 is connected to the positive terminal of diode D17. One end of the n4 coil of the transformer T1 is connected to the positive terminal of the diode D15, and the other ends of the n3 coil and the n4 coil are connected to the capacitors C44, C45, and OUT- terminal, and are also connected to the other end of the inductor L4 and the other end of the capacitor C43. The other end of the inductor L5 is connected to the negative terminal of diode D18, and the OUT+ terminal is connected in parallel to the other end of capacitor C44 and the other end of capacitor C45. The positive terminal of diode D18 is connected to resistor R49. Resistor R49 is connected to optocoupler IC6, resistor R50, and capacitor C47 in parallel. Capacitor C47 is grounded.

Images