CN209994472U - Multifunctional signal conversion circuit and multifunctional signal conversion system - Google Patents
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Abstract
A multifunctional signal conversion circuit and a multifunctional signal conversion system, the multifunctional signal conversion circuit comprising: the device comprises a first signal input module, a second signal input module, a third signal input module, a signal conversion module, a signal protection module, a signal decoding module and a video communication module; the first signal input module receives a Type-C signal; the second signal input module receives a DP signal; the third signal input module receives an HDMI signal; the signal conversion module converts at least one of the Type-C signal, the DP signal and the HDMI signal into an audio/video control signal; the signal protection module carries out encryption transmission on the audio and video control signal; the signal decoding module decodes the encrypted audio and video control signal; the video communication module receives the display identification data sent by the mobile terminal, converts the decoded audio and video control signals according to the display identification data to obtain differential video signals, and uploads the differential video signals to the mobile terminal.
Description
Technical Field
The utility model belongs to the technical field of the electronic circuit, especially, relate to a multi-functional signal conversion circuit and multi-functional signal conversion system.
Background
With the continuous development of science and technology, various electronic products such as notebook computers, liquid crystal televisions, plasma televisions and the like are more and more popular, and when the electronic devices are used, the electronic devices are generally required to be compact so as to meet more enjoyment requirements of users; however, each different electronic device is driven by a different signal source, and the different types of electronic devices are not compatible with each other, so that in order to enable the different types of electronic devices to be compatible with each other for identifying the different types of video signals, technicians must use a signal conversion technology to convert the different types of video signals into each other, and then the technicians can obtain video information through the various types of video display devices, so that the conversion between the different types of video signals has an extremely important meaning for improving the video display quality.
However, the signal conversion circuit in the conventional technology only has a single signal conversion function, and the signal conversion function is single, so that different actual requirements of technicians are difficult to meet; the types of electronic equipment on the market are continuously increased, the types of signal driving are more and more complex, a traditional signal conversion circuit can only convert one type of signal into another type of signal, the one-in one-out signal function conversion can not only lead to the increase of the cost of signal conversion, but also has lower compatibility, and the single signal conversion function can limit the application range of the signal conversion circuit, so that the practical value is not high.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a multi-functional signal conversion circuit and multi-functional signal conversion system aims at solving traditional technical scheme in the signal conversion circuit can only realize the signal conversion function of advancing one by one to the signal, and compatibility is lower, leads to signal conversion's cost higher, can't satisfy the problem of technical staff's actual circuit function demand.
The utility model discloses a first aspect of the embodiment provides a multi-functional signal conversion circuit, include:
a first signal input module configured to receive a Type-C signal;
a second signal input module configured to receive a DP signal;
a third signal input module configured to receive an HDMI signal;
a signal conversion module connected to the first signal input module, the second signal input module, and the third signal input module, and configured to convert at least one of the Type-C signal, the DP signal, and the HDMI signal into an audio/video control signal;
the signal protection module is connected with the signal conversion module and is configured to carry out encryption transmission on the audio and video control signal;
the signal decoding module is connected with the signal protection module and is configured to decode the encrypted audio and video control signal; and
and the video communication module is connected between the signal decoding module and the mobile terminal, is configured to receive display identification data sent by the mobile terminal, converts the decoded audio and video control signal into a differential video signal according to the display identification data, and uploads the differential video signal to the mobile terminal.
In one embodiment, the display identification data comprises: a resolution of the mobile terminal and a signal transmission rate supported by the mobile terminal.
In one embodiment, the method further comprises:
a power input module configured to receive a first power signal;
the first voltage reduction module is connected with the power input module and configured to reduce the voltage of the first power signal to obtain a second power signal;
the second voltage reduction module is connected with the power input module and configured to perform voltage reduction processing on the first power signal to obtain a third power signal;
a first power processing module connected to at least one of the first signal input module, the second signal input module, the third signal input module, the signal conversion module, the signal protection module, the signal decoding module, and the video communication module, connected to the first voltage reduction module, and configured to perform voltage stabilization and filtering on the second power signal; and
and the second power supply processing module is connected with at least one of the first signal input module, the second signal input module, the third signal input module, the signal conversion module, the signal protection module, the signal decoding module and the video communication module, is connected with the second voltage reduction module, and is configured to perform voltage stabilization processing and filtering processing on the third power supply signal.
In one embodiment, the first voltage reduction module comprises:
the voltage-reducing circuit comprises a first voltage-reducing chip, a first capacitor, a second capacitor, a third capacitor, a first inductor, a first resistor and a second resistor;
a power input pin of the first buck chip and a first end of the first capacitor are connected to the power input module in common, and a ground pin of the first buck chip and a second end of the first capacitor are connected to ground in common;
a switch control pin of the first buck chip is connected with a first end of the first inductor, a first end of the second capacitor, a first end of the first resistor and a first end of the second resistor are connected with a voltage feedback pin of the first buck chip in a shared mode, and a second end of the first resistor is grounded;
the second end of the first inductor, the second end of the second capacitor, the second end of the second resistor and the first end of the third capacitor are connected to the first power supply processing module in common;
and the second end of the third capacitor is grounded.
In one embodiment, the first power processing module comprises:
a first direct current transmission bus and a plurality of first power supply processing units;
the first direct current transmission bus is connected with the first voltage reduction module;
each first power supply processing unit comprises a plurality of first energy storage capacitors connected in parallel;
in each of the first power processing units, first ends of the plurality of first energy storage capacitors are commonly connected to the first dc transmission bus, second ends of the plurality of first energy storage capacitors are commonly connected to ground, the first ends of the plurality of first energy storage capacitors are commonly connected to form a power output end of the first power processing unit, and the power output end of the first power processing unit is connected to at least one of the first signal input module, the second signal input module, the third signal input module, the signal conversion module, the signal protection module, the signal decoding module, and the video communication module.
In one embodiment, the second signal input module comprises:
the first signal conversion chip, the crystal oscillator chip, the fourth capacitor and the fifth capacitor are connected in series;
the signal input pins of the first signal conversion chip receive the DP signals through a resistor respectively;
the signal output pin of the first signal conversion chip is connected with the signal conversion module;
the grounding pin of the crystal oscillator chip is grounded;
a first signal input and output pin of the crystal oscillator chip and a first end of the fourth capacitor are connected to an oscillation signal input pin of the first signal conversion chip in a shared mode, and a second end of the fourth capacitor is grounded;
and a second signal input/output pin of the crystal oscillator chip and a first end of the fifth capacitor are connected to an oscillation signal output pin of the first signal conversion chip in a shared mode, and a second end of the fifth capacitor is grounded.
In one embodiment, the first signal input module comprises:
the signal compression unit is connected with the signal conversion module and is configured to receive and compress and transmit the Type-C signal; and
and the first signal protection unit is connected with the signal compression unit and is configured to perform hot plug protection on the Type-C signal.
In one embodiment, the third signal input module comprises:
the signal monitoring unit is connected with the signal conversion module and is configured to detect whether the HDMI signal is accessed or not, and when the HDMI signal is accessed, the signal monitoring unit monitors and transmits the HDMI signal;
the second signal protection unit is connected with the signal monitoring unit and is configured to perform hot plug protection on the HDMI signal; and
a timing unit connected with the signal monitoring unit and configured to output a timing signal.
In one embodiment, the mobile terminal includes at least one of a cell phone and a tablet computer.
A second aspect of the embodiments of the present invention provides a multifunctional signal conversion system, including:
the multifunctional signal conversion circuit as described above; and
and the signal storage equipment is connected with the multifunctional signal conversion circuit and used for storing and outputting the Type-C signal, the DP signal and the HDMI signal.
The multifunctional signal conversion circuit is respectively accessed with three types of video signals through the first signal input module, the second signal input module and the third signal input module, then the three types of video signals are converted into audio and video control signals through the signal conversion module, the multifunctional signal conversion circuit can compatibly transmit the three types of video signals, communication connection is established between the video communication module and the mobile terminal so as to realize a communication handshake protocol between the multifunctional signal conversion circuit and the mobile terminal, the video communication module can quickly upload audio and video control information to the mobile terminal so as to drive the mobile terminal to display corresponding video information in real time, and good visual experience is brought to technical staff; consequently the embodiment of the utility model provides an in multi-functional signal conversion circuit convert the video signal of three kinds into the difference video signal who accords with mobile terminal's display parameter requirement to reach the video signal conversion effect of "three advance one play", multi-functional signal conversion circuit has multiple signal conversion function, has reduced video signal's conversion cost, but among the compatible mobile terminal who is applicable to among the each industry technical field, satisfied technical staff's different video display demand.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a multifunctional signal conversion circuit according to an embodiment of the present invention;
fig. 2 is another schematic structural diagram of a multifunctional signal conversion circuit according to an embodiment of the present invention;
fig. 3 is a schematic circuit structure diagram of a first voltage reduction module according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a first power processing module according to an embodiment of the present invention;
fig. 5 is a schematic circuit structure diagram of a second voltage reduction module according to an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a second power processing module according to an embodiment of the present invention;
fig. 7 is a schematic circuit diagram of a second signal input module according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a first signal input module according to an embodiment of the present invention;
fig. 9 is a schematic circuit diagram of a first signal input module according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a third signal input module according to an embodiment of the present invention;
fig. 11 is a schematic circuit diagram of a third signal input module according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a multifunctional signal conversion system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, in the structural schematic diagram of the multifunctional signal conversion circuit 10 provided in the embodiment of the present invention, the multifunctional signal conversion circuit 10 is connected to the mobile terminal 20, and the multifunctional signal conversion circuit 10 can convert three types of video signals, so that the video signals obtained after the conversion by the multifunctional signal conversion circuit 10 can completely conform to the video playing format of the mobile terminal 20, and the compatibility is very strong; for convenience of explanation, only the parts related to the present embodiment are shown, and detailed as follows:
the above-mentioned multi-function signal conversion circuit 10 includes: a first signal input module 101, a second signal input module 102, a third signal input module 103, a signal conversion module 104, a signal protection module 105, a signal decoding module 106, and a video communication module 107.
Wherein the first signal input module 101 receives a Type-C signal.
The Type-C signal has higher signal transmission rate and signal compatibility, can transmit the video information of large capacity through the Type-C signal, and the Type-C signal has higher signal transmission rate and signal compatibility, first signal input module 101 can keep the high-quality transmission of Type-C signal under various communication environment, and multi-functional signal conversion circuit 10 can compatibly insert video information to drive multi-functional signal conversion circuit 10 realizes the signal conversion function.
The second signal input module 102 receives a DP (display interface) signal.
The second signal input module 102 can achieve compatible transmission of the DP signal, and the DP signal includes high definition digital display information, so that video information of various colors can be provided through the DP signal, and further video information with more dynamic feeling can be provided for technicians by combining the DP signal, thereby improving the video information conversion accuracy and speed of the multifunctional signal conversion circuit 10.
The third signal input module 103 receives an HDMI (High-Definition Multimedia Interface) signal.
The HDMI signals comprise multi-channel audio data and high-capacity video data, and can realize high-speed transmission on various transmission media so as to ensure the precision and stability of the HDMI signals in the transmission process; and the HDMI signal has the video data of different code bits, and the HDMI signal can keep compatible transmission in various transmission media to keep the transmission high efficiency of video information, prevent that video information and audio information from appearing the loss in the transmission process.
It should be noted that the Type-C signal, the DP signal, and the HDMI signal belong to three different types of video signals, and each Type of video signal conforms to a specific communication protocol, so that the present embodiment is configured to access three types of video signals respectively through three different signal input modules, each Type of signal input module can enable the corresponding video signal to maintain an optimal signal transmission state, the multifunctional signal conversion circuit 10 has a higher signal transmission rate and compatibility, the multifunctional signal conversion circuit 10 can identify video information of the various types of video signals, and the multifunctional signal conversion circuit can be universally applied to different industrial technology fields to meet actual requirements of technicians.
The signal conversion module 104 is connected to the first signal input module 101, the second signal input module 102, and the third signal input module 103, and converts at least one of the Type-C signal, the DP signal, and the HDMI signal into an audio/video control signal.
The signal conversion module 104 has a video signal conversion function, and the format and the signal transmission state of the input signal can be changed in real time through the signal conversion module 104, so that the audio and video control signal output by the signal conversion module 104 has different signal transmission formats to be transmitted by matching with corresponding electronic components, and further the signal conversion module 104 can change different signal transmission channels in real time to meet the transmission requirements of different signal channels; the signal conversion module 104 can perform compatible conversion and output on any one, two or even three of the Type-C signal, the DP signal and the HDMI signal, and the signal conversion module 104 has high signal compatible conversion performance, thereby improving the expandability and flexibility of the signal conversion process of the multifunctional signal conversion circuit 10.
The signal protection module 105 is connected with the signal conversion module 104, and encrypts and transmits the audio/video control signal.
The signal Protection module 105 can realize an HDCP (High bandwidth digital Content Protection) Protection function for the audio and video control signal, and the signal Protection module 105 can maintain the originality of the audio data and the video data in the audio and video control signal, so as to prevent the audio and video control signal from being interfered by the outside and stolen by an external lawbreaker in the transmission process, thereby ensuring the safety and the effectiveness of the multifunctional signal conversion circuit 10 for signal conversion; different data transmission rates can be supported after the audio and video control signals are encrypted; the audio and video control signal comprises audio data and video data, and the playing function of high-definition video can be realized after the audio and video control signal is encrypted and transmitted; therefore, the embodiment can perform key protection on the video information through the signal protection module 105, and realize the functions of secure transmission and secure storage of the audio/video control signal.
The signal decoding module 106 is connected with the signal protection module 105, and decodes the encrypted audio/video control signal.
The signal protection module 105 outputs the encrypted audio and video control signal to the signal decoding module 106, the signal decoding module 106 can decode the audio and video control signal in real time to accurately acquire video information in the audio and video control signal, so that the audio and video control signal can be compatibly transmitted among different circuit modules, and when the multifunctional signal conversion circuit 10 converts and transmits different types of video signals, the video information of the audio and video control signal can still be restored through decoding operation, the compatible transmission performance and communication stability of the audio and video control signal are guaranteed, and then the multifunctional signal conversion circuit 10 can perform rapid and complete conversion and transmission functions on the video information to meet different video playing requirements.
The video communication module 107 is connected between the signal decoding module 106 and the mobile terminal 20, receives the display identification data sent by the mobile terminal 20, converts the decoded audio/video control signal according to the display identification data to obtain a differential video signal, and uploads the differential video signal to the mobile terminal 20.
The video communication module 107 and the mobile terminal 20 can maintain a good signal communication function, and the mobile terminal 20 can feed back the display identification data of the mobile terminal 20 to the video communication module 107 so as to change the signal conversion state of the video communication module 107; specifically, when the signal decoding module 106 outputs the decoded audio/video control signal to the video communication module 107, the video communication module 107 can perform communication handshake with the mobile terminal 20, thereby establishing a fast signal transmission channel between the video communication module 107 and the mobile terminal 20, and the video communication module 107 can acquire information such as video display specifications of the mobile terminal 20 from the display identification data, the video communication module 107 then converts the audio video control signals to corresponding differential video signals, the differential video signal contains complete video information, and the differential video signal obtained after conversion by the video communication module 107 can completely meet the video display requirement of the mobile terminal 20, so that the mobile terminal 20 can send out corresponding audio information and video information in real time to meet the actual visual requirement and auditory requirement of technicians; therefore, the multifunctional signal conversion circuit 10 in this embodiment realizes the conversion output function for three different types of video information, can completely meet the video viewing requirements of technicians, and has strong compatibility.
Optionally, the display identification data includes: the resolution of the mobile terminal 20 and the signal transmission rate supported by the mobile terminal 20.
Because the mobile terminal 20 and the video communication module 107 perform protocol communication, and the multifunctional signal conversion circuit 10 can obtain a video playing specification of the mobile terminal 20 in real time, when the video communication module 107 converts the decoded audio/video control signal to obtain a differential video signal, the video communication module 107 can output the differential video signal to the mobile terminal 20 at a preset signal transmission rate, and the mobile terminal 20 can safely capture audio information and video information, so that the transmission efficiency and the transmission quality of the differential video signal are ensured, and the multifunctional signal conversion circuit 10 and the mobile terminal 20 have higher communication safety and communication efficiency; the audio/video control signal output by the video communication module 107 can completely meet the resolution requirement of the mobile terminal 20, so that the mobile terminal 20 can realize the optimal audio playing and the optimal video playing effects according to the audio/video control signal, the image displayed by the mobile terminal 20 has higher definition, and better visual experience is brought to technicians; therefore, the multi-function signal conversion circuit 10 in this embodiment can uniformly convert various types of video signals into differential video signals according to the video playing requirement of the mobile terminal 20, and the signal conversion quality and compatibility of the multi-function signal conversion circuit 10 are ensured.
Illustratively, the mobile terminal 20 includes at least one of a cell phone and a tablet computer; technicians can obtain corresponding video information through different types of electronic equipment, and good use experience is brought to the technicians.
Therefore, in the structural schematic of the multifunctional signal conversion circuit 10 shown in fig. 1, the multifunctional signal conversion circuit 10 can not only be compatible with the input of three types of video signals, and ensure the transmission quality and the anti-interference performance of various types of video signals, but also can completely match the video playing requirement of the mobile terminal 20 with the video information obtained by uniformly converting the three types of video signals, so that the mobile terminal 20 can completely present high-definition video and high-tone sound information, so as to meet various visual and auditory requirements of technicians, and can be generally applied to various different industrial technical fields; therefore, the multifunctional signal conversion circuit 10 in this embodiment can realize a "three-in one-out" signal conversion function, the precision and efficiency of signal conversion are high, and the cost of video signal conversion is reduced, and the multifunctional signal conversion circuit 10 can perform accurate conversion on various types of video signals to obtain corresponding audio and video data so as to match the video playing requirements of various types of mobile terminals 20; the problems that in the prior art, when different types of display equipment are connected, large signal conversion cost needs to be consumed, a traditional signal conversion circuit is single in signal conversion function and low in compatibility, and different video playing requirements of technicians cannot be met are effectively solved.
As an alternative implementation, fig. 2 shows another module structure of the multi-function signal conversion circuit 10 provided in this embodiment, and compared with the module structure of the multi-function signal conversion circuit 10 in fig. 1, the multi-function signal conversion circuit 10 in fig. 2 further includes: the power source module comprises a power source input module 108, a first voltage reduction module 109, a second voltage reduction module 110, a first power source processing module 111 and a second power source processing module 112.
The power input module 108 receives a first power signal.
Optionally, the first power signal may be from inside the multifunctional signal conversion circuit 10 or from outside the multifunctional signal conversion circuit 10, and then the multifunctional signal conversion circuit 10 may use an internal power supply or an external power supply, and the multifunctional signal conversion circuit 10 has high electric energy compatibility and high controllability.
Illustratively, the first power signal is generated by a direct current power supply; the first power supply signal contains direct current electric energy, and rated electric energy can be provided for each circuit module in the multifunctional signal conversion circuit 10 through the first power supply signal, so that the power supply safety of each circuit module is improved; in this embodiment, the power input module 108 can be compatible with various types of dc power, and the multifunctional signal conversion circuit 10 can achieve a more stable signal conversion function.
The first voltage reduction module 109 is connected to the power input module 108, and the first voltage reduction module 109 performs voltage reduction processing on the first power signal to obtain a second power signal.
The second voltage reduction module 110 is connected to the power input module 108, and performs voltage reduction processing on the first power signal to obtain a third power signal.
Optionally, the voltage amplitude of the second power signal is different from the voltage amplitude of the third power signal, and then after the voltage reduction processing is performed on the first power signal through the first voltage reduction module 109 and the second voltage reduction module 110, the obtained second power signal and the obtained third power signal respectively contain different direct current electric energy, and then the power supply requirements of different electronic components can be met through the second power signal and the third power signal, so that the power supply safety and stability of each circuit module in the multifunctional signal conversion circuit 10 are ensured.
Optionally, the current amplitude of the second power signal is different from the current amplitude of the third power signal.
Illustratively, the first power supply signal has a voltage amplitude of 18V, the second power supply signal has a voltage amplitude of 3.3V, and the third power supply signal has a power supply amplitude of 1.0V.
Illustratively, the current amplitude of the first power supply signal is 5.0A, the current amplitude of the second power supply signal is 1.2A, and the current amplitude of the third power supply signal is 1.5A.
Therefore, in this embodiment, different voltage reduction processing functions are realized for the first power signal through the first voltage reduction module 109 and the second voltage reduction module 110, so that the efficiency and the conversion accuracy of the internal power conversion of the multifunctional signal conversion circuit 10 are ensured, and the power consumption requirement of the circuit module can be completely met after the voltage reduction is performed on the direct current power, so that the working safety and the power supply stability of the internal circuit module of the multifunctional signal conversion circuit 10 are ensured.
The first power processing module 111 is connected to at least one of the first signal input module 101, the second signal input module 102, the third signal input module 103, the signal conversion module 104, the signal protection module 105, the signal decoding module 106, and the video communication module 107, and is connected to the first voltage reduction module 109, and performs voltage stabilization processing and filtering processing on the second power signal.
When the first voltage-reducing module 109 outputs the second power signal to the first power processing module 111, the first voltage-reducing module 109 can eliminate an interference component in the second power signal, so that the second power signal maintains stable electric energy, and output the second power signal after voltage-stabilizing processing and filtering processing to one or more power modules, so as to drive the circuit module to realize a normal circuit function, and further, the first power processing module 111 in this embodiment has higher electric energy transmission safety and efficiency.
The second power processing module 112 is connected to at least one of the first signal input module 101, the second signal input module 102, the third signal input module 103, the signal conversion module 104, the signal protection module 105, the signal decoding module 106, and the video communication module 107, and is connected to the second voltage reduction module 110, and performs voltage stabilization processing and filtering processing on the third power signal.
As a preferred embodiment, the second power processing module 112 and the first power processing module 111 cannot be connected to the same circuit module, so as to prevent the circuit module in the multifunctional signal conversion circuit 10 from accessing the second power signal and the third power signal at the same time; and the circuit module in the multifunctional signal conversion circuit 10 has higher power supply safety and stability.
In this embodiment, the first power processing module 111 and the second power processing module 112 respectively perform voltage stabilization processing and filtering processing on the dc power after voltage reduction processing to output more accurate and stable dc power, and the circuit module in the multifunctional signal conversion circuit 10 has higher power supply safety and control accuracy, so as to prevent the circuit module in the multifunctional signal conversion circuit 10 from being in an overvoltage operation state or an overcurrent operation state; the multi-function signal conversion circuit 10 has higher video signal conversion efficiency and accuracy.
As an optional implementation manner, fig. 3 shows a schematic circuit structure of the first voltage-reducing module 109 provided in this embodiment, please refer to fig. 3, where the first voltage-reducing module 109 includes: the voltage-reducing circuit comprises a first voltage-reducing chip U1, a first capacitor C1, a second capacitor C2, a third capacitor C3, a first inductor L1, a first resistor R1 and a second resistor R2.
The power input pin VIN of the first buck chip U1 and the first end of the first capacitor C1 are commonly connected to the power input module 108, and the ground pin of the first buck chip U1 and the second end of the first capacitor C1 are commonly connected to ground GND.
The power input module 108 outputs the first power signal to the power input pin VIN of the first buck chip U1, and the first capacitor C1 may perform a voltage stabilizing function on the first power signal, so that the first buck module 109 has a higher power transmission rate.
The switch control pin SW of the first buck chip U1 is connected with the first end of the first inductor L1, and the working or stopping state of the first buck chip U1 can be changed through the switch control pin SW; the first end of the second capacitor C2, the first end of the first resistor R1 and the first end of the second resistor R2 are commonly connected to the voltage feedback pin FB of the first buck chip U1, and the second end of the first resistor R1 is grounded GND; after the first buck chip U1 performs buck processing on the second power signal, the first buck chip U1 can output the second power signal after buck through the voltage feedback pin FB, so that the buck rate of the dc power is faster.
The second terminal of the first inductor L1, the second terminal of the second capacitor C2, the second terminal of the second resistor R2, and the first terminal of the third capacitor C3 are commonly connected to the first power processing module 111.
The second end of the third capacitor C3 is grounded to GND.
As an optional implementation, the model of the first buck chip U1 is: XC 8015; therefore, the first voltage-reducing module 109 in this embodiment can implement real-time voltage-reducing processing on the dc electric energy through the first voltage-reducing chip U1, and has a simple circuit structure, thereby reducing electric energy loss.
As an optional implementation manner, fig. 4 shows a schematic circuit structure of the first power processing module 111 provided in this embodiment, please refer to fig. 4, where the first power processing unit 401 includes: a first dc transmission bus L1 and a plurality of first power supply processing units 401;
the first direct current transmission bus L1 is connected with the first voltage reduction module 109; the first dc transmission bus L1 transmits the second power signal after the voltage reduction process, and the power transmission efficiency and accuracy of the second power signal can be guaranteed by the first dc transmission bus L1.
Each of the first power processing units 401 includes a plurality of first energy-storage capacitors (represented by C41, C42, C43, C44, C45, C46, C47, C48, C49, C410, C411, C412, C413, C414, and C415 in fig. 4) connected in parallel.
In each of the first power processing units 401, first ends of a plurality of the first energy storage capacitors are commonly connected to the first dc transmission bus L1, second ends of a plurality of the first energy storage capacitors are commonly connected to ground GND, first ends of a plurality of the first energy storage capacitors are commonly connected to form a power output end of the first power processing unit 401, and a power output end of the first power processing unit 401 is connected to at least one of the first signal input module 101, the second signal input module 102, the third signal input module 103, the signal conversion module 104, the signal protection module 105, the signal decoding module 106, and the video communication module 107; after the voltage stabilization processing and the filtering processing are performed on the second power signal through the plurality of parallel first energy storage capacitors, the first power processing unit 401 can rapidly transmit the direct current electric energy to one or more circuit modules in the multi-functional signal conversion circuit 10 through the power output end, so that the safety of electric energy supply in the multi-functional signal conversion circuit 10 is ensured.
Illustratively, the first power processing unit 401 includes 4 or 8 first energy-storage capacitors connected in parallel, and since the capacitors have filtering and voltage-stabilizing functions, the first power processing module 111 has a relatively compatible circuit structure, and can implement a fast power processing function on the dc power through the plurality of first energy-storage capacitors, and the second power signal output by the second voltage-reducing module 110 has higher power quality and power supply safety.
As an optional implementation manner, fig. 5 shows a schematic circuit structure of the second voltage-reducing module 110 provided in this embodiment, please refer to fig. 5, where the second voltage-reducing module 110 includes: the second buck chip U4, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a second inductor L2, a third resistor R3, and a fourth resistor R4.
The power input pin VIN of the second buck chip U4 and the first end of the seventh capacitor C7 are commonly connected to the power input module 108, and the ground pin of the second buck chip U4 and the second end of the seventh capacitor C7 are commonly connected to the ground GND.
The power input module 108 outputs the first power signal to the power input pin VIN of the second buck chip U4, and the seventh capacitor C7 can stabilize the first power signal, so as to ensure the transmission stability of the first power signal.
The switch control pin SW of the second buck chip U4 is connected with the first end of the second inductor L2, and the working or stopping state of the second buck chip U4 can be changed through the switch control pin SW; a first end of the eighth capacitor C8, a first end of the third resistor R3, and a first end of the fourth resistor R4 are commonly connected to the voltage feedback pin FB of the second buck chip U4, and a second end of the third resistor R3 is grounded GND; after the second buck chip U4 performs buck processing on the first power signal, the first buck chip U1 can output a third power signal after buck through the voltage feedback pin FB, so that the dc voltage reduction precision is high, and the power loss of the dc power in the buck process is avoided.
The second terminal of the second inductor L2, the second terminal of the eighth capacitor C8, the second terminal of the fourth resistor R4, and the first terminal of the ninth capacitor C9 are commonly connected to the second power processing module 112.
The second end of the ninth capacitor C9 is grounded to GND.
As an optional implementation, the model of the second buck chip U4 is: XC 8015; therefore, the second buck module 110 in this embodiment can implement real-time buck processing on the dc power through the second buck chip U4, thereby improving the buck rate and accuracy.
As an optional implementation manner, fig. 6 shows a circuit structure schematic of the second power processing module 112 provided in this embodiment, please refer to fig. 6, where the second power processing module 112 includes: a second dc transmission bus L2 and a plurality of second power processing units 601; the second direct current transmission bus L2 is connected with the second voltage reduction module 110; each of the second power processing units 601 includes a plurality of second energy-storing capacitors (represented by C101, C102, C03, C04, C105, C106, C107, C108, C109, C1010, C1011, C1012, C1013, C1014, and C1015 in fig. 6) connected in parallel.
In each of the second power processing units 601, first ends of the plurality of second energy-storage capacitors are commonly connected to the second dc transmission bus L2, second ends of the plurality of second energy-storage capacitors are commonly connected to ground GND, first ends of the plurality of second energy-storage capacitors are commonly connected to form a power output end of the second power processing unit 601, and a power output end of the second power processing unit 601 is connected to at least one of the first signal input module 101, the second signal input module 102, the third signal input module 103, the signal conversion module 104, the signal protection module 105, the signal decoding module 106, and the video communication module 107.
It should be noted that the circuit structure of the second power processing module 112 in fig. 6 is similar to the circuit structure of the first power processing unit 401 in fig. 4, and thus, reference may be made to the embodiment of fig. 4 for a specific implementation of the second power processing module 112 in fig. 6, which will not be described again here.
Therefore, in this embodiment, the second power processing module 112 implements voltage stabilization and filtering functions of the third power signal through the plurality of second energy-storage capacitors connected in parallel, and greatly ensures the power supply safety of each circuit module inside the multifunctional signal conversion circuit 10.
As an alternative implementation, fig. 7 shows a schematic circuit structure of the second signal input module 102 provided in this embodiment, please refer to fig. 7, where the second signal input module 102 includes: the first signal conversion chip U2, the crystal oscillator chip U3, the fourth capacitor C4 and the fifth capacitor C5.
The signal input pins of the first signal conversion chip U2 receive the DP signal through a resistor respectively.
Illustratively, the signal input pin of the first signal conversion chip U2 includes: RXOP, RXON, RXAVDD10, RXIP, RXIN, RX2P, RX2N, RX3P, RX3N, RXAVDD33, ASPVCC33, and ASPVCC 10; and the first signal conversion chip U2 can access the DP signal in real time, which improves the signal conversion rate of the multifunctional signal conversion circuit 10.
The signal output pin of the first signal conversion chip U2 is connected to the signal conversion module 104.
Illustratively, the signal output pin of the first signal conversion chip U2 includes: TX2P, TX2M, TX1P, TX1M, TX0P, TX0M, TXCP, TXCM, REXT, and SCK/MCLK; when the first signal conversion chip U2 receives the DP signal, the first signal conversion chip U2 can compatibly output the DP signal to the signal conversion module 104 through the signal output pin, which is beneficial to ensuring the video information transmission efficiency and accuracy between the internal circuit modules of the multifunctional signal conversion circuit 10.
The ground pin of the crystal oscillator chip U3 is grounded GND.
The first signal input/output pin of the crystal oscillator chip U3 and the first end of the fourth capacitor C4 are commonly connected to the oscillation signal input pin XTALIN of the first signal conversion chip U2, and the second end of the fourth capacitor C4 is grounded to GND.
The second signal input/output pin of the crystal oscillator chip U3 and the first end of the fifth capacitor C5 are commonly connected to the oscillation signal output pin XTALOUT of the first signal conversion chip U2, and the second end of the fifth capacitor C5 is connected to the ground GND.
Illustratively, the model of the crystal oscillator chip U3 is: LTC 1799.
The crystal oscillator chip U3 can generate a crystal oscillator signal with a specific crystal oscillator frequency, and when the first signal conversion chip U2 is connected to the crystal oscillator signal, the first signal conversion chip U2 can maintain a safe and stable working state through the crystal oscillator signal.
Optionally, the model of the first signal conversion chip U2 is: IT6563 FN; in the embodiment, the first signal conversion chip U2 realizes the compatible transmission function of the DP signal, and avoids the energy loss generated in the transmission process of the DP signal; specifically, the first signal conversion chip U2 completely conforms to the DP signal transmission protocol and is backward compatible with different types of video information transmission specifications. The second signal input module 102 can support color depths up to 36 bits (12 bits/color) and ensure compatible transmission of high quality uncompressed video content; the first signal conversion chip U2 supports various video output formats and also supports 8-channel digital audio, the sampling rate is up to 192kHz, and the sampling size is up to 24 bits; the first signal conversion chip U2 realizes information interaction with an external signal source, the first signal conversion chip U2 can completely sense the transmission state of the DP signal, and then the first signal conversion chip U2 can completely receive video information in the DP signal, so that the communication compatibility and the information interaction function of the multifunctional signal conversion circuit 10 are improved, and the multifunctional signal conversion circuit is universally applicable to various industrial technical fields.
As an alternative implementation, fig. 8 shows a schematic structure of the first signal input module 101 provided in this embodiment, please refer to fig. 8, where the first signal input module 101 includes: a signal compression unit 1011 and a first signal protection unit 1012.
The signal compression unit 1011 is connected to the signal conversion module 104, and the signal compression unit 1011 receives and compresses and transmits the Type-C signal.
When the signal compression unit 1011 receives the Type-C signal, the signal compression unit 1011 can encode and compress video data and audio data in the Type-C signal, so that the compressed Type-C signal keeps a higher signal transmission rate in a signal transmission channel, the first signal input module 101 can transmit video information and audio information with a larger capacity, and then the multifunctional signal conversion circuit 10 can realize higher signal conversion accuracy and transmission rate for the compressed Type-C signal, and the Type-C signal can completely keep the integrity and compatibility of the video information in the format conversion process.
The first signal protection unit 1012 is connected with the signal compression unit 1011, and the first signal protection unit 1012 performs hot plug protection on the Type-C signal.
The first signal protection unit 1012 can monitor the safety and integrity of a signal transmission channel in the signal compression unit 1011 in real time, and then the first signal input module 101 has higher video information transmission precision and effectiveness, so as to prevent the Type-C signal from being subjected to power failure damage and signal distortion in the transmission process; this embodiment can realize the plug-and-play's of external equipment effect to first signal input module 101 through first signal protection unit 1012, has ensured multi-functional signal conversion circuit 10 has brought higher use experience for the technical staff to the signal conversion efficiency and the conversion precision of Type-C signal, and the compatibility is stronger.
As an alternative implementation, fig. 9 shows a schematic circuit structure of the first signal input module 101 provided in this embodiment, please refer to fig. 9, where the first signal input module 101 includes: the second signal conversion chip U5, the voltage stabilization chip U6, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a third inductor L3, a fifth resistor R5 and a sixth resistor R6;
and a signal input pin of the second signal conversion chip U5 is connected with the Type-C signal.
Illustratively, the signal input pin of the second signal conversion chip U5 includes: LANE1_ P, LANE1_ N, LANE2_ P and LANE2_ N; and the second signal conversion chip U5 can access the Type-C signal in real time and maintain the transmission integrity and compatibility of video information.
The signal output pin of the second signal conversion chip U5 is connected to the signal conversion module 104.
Illustratively, the signal output pin of the second signal conversion chip U5 includes: HDMI _ D2P, HDMI _ D2N, HDMI _ D1P, HDMI _ D1N, HDMI _ D0P, and HDMI _ D0N; furthermore, the multifunctional signal conversion circuit 10 in the embodiment has a higher Type-C signal transmission rate and conversion accuracy.
The voltage-stabilizing control pin of the second signal conversion chip U5 is connected with at least one capacitor, and the power supply stability and the internal electric energy balance of the second signal conversion chip U5 are guaranteed through the capacitor.
Illustratively, the voltage regulation control pin of the second signal conversion chip U5 includes: VCCK _11, PVCC _33, HDMI _ AVDD33, HDMI _ AVDD11, USB _ V33, DPRX _ V11, and DPRX _ V33.
The first end of the twelfth capacitor C12, the first end of the thirteenth capacitor C13, the first end of the third inductor L3, and the first end of the fifth resistor R5 are commonly connected to a voltage stabilizing control pin of a second signal conversion chip U5, the second end of the third inductor L3 is connected to a switch control pin SW of the voltage stabilizing chip U6, and the voltage stabilizing chip U6 can be in an operating or stopping state through the switch control pin SW.
The second end of the twelfth capacitor C12, the second end of the fifth resistor R5 and the first end of the sixth resistor R6 are commonly connected to the voltage output pin FB of the regulator chip U6, and the second end of the sixth resistor R6 and the second end of the thirteenth capacitor C13 are commonly connected to the ground GND.
The voltage input pin VIN of the voltage stabilizing chip U6 and the first end of the eleventh capacitor C11 are connected to power supply, and the second end of the eleventh capacitor C11 and the ground pin of the voltage stabilizing chip U6 are connected to the ground GND in common.
Optionally, the type of the voltage stabilizing chip U6 is: XC 8015; when the voltage input pin VIN of the voltage stabilization chip U6 is connected to the power supply electric energy, the power supply electric energy is stabilized by the voltage stabilization chip U6 and then output to the second signal conversion chip U5, so as to realize the power-on function of the second signal conversion chip U5, and the second signal conversion chip U5 has higher power supply safety and stability.
Optionally, the model of the second signal conversion chip U5 is RTD 2171U; the transmission precision and the transmission efficiency of the Type-C signal can be guaranteed through the second signal conversion chip U5; specifically, the maximum audio sampling rate of the second signal conversion chip U5 is 192KHz, and the second signal conversion chip U5 supports an 8-channel, transmission and compression audio coding format, the rate of which is as high as 3Gbps per channel, and allows the display resolution to be as high as 3840x2160 or 1920x1080 at 8-bit color depth under a 30-bit refresh rate; the refresh rate is 60Hz, and the color depth is 8/10 bits; the second signal conversion chip U5 and its peripheral electronic components support monitoring hot plug detection signals and are used for channel monitoring; therefore, the first signal input module 101 in this embodiment has higher signal compatibility, and ensures the conversion accuracy of the Type-C signal.
As an alternative implementation, fig. 10 shows a schematic block structure of the third signal input module 103 provided in this embodiment, please refer to fig. 10, where the third signal input module 103 includes: a signal monitoring unit 1031, a second signal protection unit 1032, and a timing unit 1033.
The signal monitoring unit 1031 is connected to the signal conversion module 104, detects whether the HDMI signal is accessed, and monitors and transmits the HDMI signal when the HDMI signal is accessed.
The signal monitoring unit 1031 can monitor the signal transmission state of the HDMI signal, and only when the HDMI signal conforms to the signal transmission specification, the HDMI signal can be transmitted by the signal monitoring unit 1031; furthermore, the third signal input module 103 in this embodiment can not only ensure the transmission efficiency of the HDMI signal, but also keep the HDMI signal in a higher integrity of video information during transmission, thereby reducing useless power consumption during transmission of the HDMI signal; the third signal input module 103 has higher communication compatibility and signal transmission reliability.
The second signal protection unit 1032 is connected to the signal monitoring unit 1031, and performs hot plug protection on the HDMI signal.
The second signal protection unit 1032 can ensure the signal transmission compatibility of the signal monitoring unit 1031, so that the HDMI signal can maintain a compatible signal conversion function in the multifunctional signal conversion circuit 10, the HDMI signal can realize real-time signal transmission safety, and the phenomenon that video information is lost in the process of receiving the HDMI signal by the multifunctional signal conversion circuit 10 is prevented; furthermore, a more complete picture can be obtained after the HDMI signal is converted through the multifunctional signal conversion circuit 10, and the practical value is higher.
The timing unit 1033 is connected to the signal monitoring unit 1031, and outputs a timing signal.
The timing unit 1033 can provide a timing signal to the signal monitoring unit 1031, so that the monitoring unit 1031 can maintain the optimal transmission stability of the HDMI signal, the third signal input module 103 can maintain the synchronization of clock information, the HDMI signal can achieve a longer signal transmission distance, the type conversion accuracy of the internal signal of the multifunctional signal conversion circuit 10 is improved, and the expandability is very strong; therefore, the present embodiment guarantees the signal transmission stability and the interference immunity of the signal monitoring unit 1031 through the timing unit 1033.
For example, the specific circuit structure of the timing unit 1033 may be implemented by using a 555 timer in the conventional technology.
As an alternative implementation, fig. 11 shows a schematic circuit structure of the third signal input module 103 provided in this embodiment, please refer to fig. 11, where the third signal input module 103 includes a third signal conversion chip U7.
Wherein the signal input pin of the third signal conversion chip U7 receives the HDMI signal.
Illustratively, the signal input pin of the third signal conversion chip U7 includes: p1RXCN, P1RXCP, P1RXON, and P1 RXOP.
The signal output pin of the third signal conversion chip U7 is connected to the signal conversion module 104.
Illustratively, the signal output pin of the third signal conversion chip U7 includes: TXCM, TXCP, TXOM, and TXOP.
Optionally, the model of the third signal conversion chip U7 is: IT 66351; furthermore, in this embodiment, the compatible transmission function of the HDMI signal can be realized through the third signal conversion chip U7; specifically, the present implementation implements retiming switching by the third signal conversion chip U7, supports the maximum signal rate of the highest 6Gbps channel, conforms to the latest HDMI signal transmission specification, and is backward compatible with various newer versions of HDMI signal specifications. The switching of output multi-channel signal transmission channels is supported, and the plug-in state of the inactive input port is automatically detected; the intelligent programmable power supply management monitors the safety performance of the HDMI signal transmission through hot plug detection and detection so as to flexibly and simply control the HDMI signal transmission process; all necessary remote signal transmission control commands are realized through the third signal conversion chip U7, when the HDMI signal is transmitted in the third signal conversion chip U7, each path of HDMI signal supports the HDMI signal data rate, which is up to 18Gbps, and the third signal conversion chip U7 can support the ultra-high resolution content stream, such as 4Kx2K @50/60Hz video format; wherein the third signal conversion chip U7 may implement a retiming function to provide superior application performance for long cable applications.
Fig. 12 shows a structural schematic diagram of the multifunctional signal converting system 120 provided in this embodiment, please refer to fig. 12, where the multifunctional signal converting system 120 includes the multifunctional signal converting circuit 10 and a signal storage device 1201 as described above, the signal storage device 1201 is connected to the multifunctional signal converting circuit 10, and the signal storage device 10 is configured to store and output a Type-C signal, a DP signal, and an HDMI signal; and then, after at least one of the Type-C signal, the DP signal and the HDMI signal is converted by the multifunctional signal conversion circuit 10 and then a differential video signal is output, and then after the multifunctional signal conversion circuit 10 and the mobile terminal 20 realize a handshake protocol, the multifunctional signal conversion circuit 10 sends video information to the mobile terminal 20, so that the mobile terminal 20 can realize the functions of video display and audio playing.
Illustratively, the signal storage device 10 is a RAM (Random Access Memory) or a ROM (Read Only Memory); wherein the signal storage device 10 can output one or more types of video signals to meet the actual visual and auditory needs of the user; therefore, the signal storage device 10 in this embodiment has a strong video information pre-storage function and strong compatibility.
Referring to the embodiments of fig. 1 to 11, the multifunctional signal conversion system 120 in this embodiment can implement a three-in one-out signal conversion function, the conversion function of video signals is relatively complete, and the compatibility is very high, so that the video data obtained by conversion by the multifunctional signal conversion system 120 can completely meet the video format requirements of various mobile terminals 20, the expandability is very high, and the conversion cost of the video signals is reduced; therefore, the multifunctional signal conversion system 120 in this embodiment can meet the actual requirements of technicians for the multifunctional conversion performance of video signals, and is suitable for the rapid development of the current electronic products, thereby bringing good use experience to users; the problems that in the traditional technology, the video signal conversion function is single, the expandability is low, the actual requirements of technicians are difficult to meet, and the signal conversion cost is high are effectively solved.
Various embodiments are described herein for various devices, circuits, apparatuses, systems, and/or methods. Numerous specific details are set forth in order to provide a thorough understanding of the overall structure, function, manufacture, and use of the embodiments as described in the specification and illustrated in the accompanying drawings. However, it will be understood by those skilled in the art that the embodiments may be practiced without such specific details. In other instances, well-known operations, components and elements have been described in detail so as not to obscure the embodiments in the description. It will be appreciated by those of ordinary skill in the art that the embodiments herein and shown are non-limiting examples, and thus, it can be appreciated that the specific structural and functional details disclosed herein may be representative and do not necessarily limit the scope of the embodiments.
Reference throughout the specification to "various embodiments," "in an embodiment," "one embodiment," or "an embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in various embodiments," "in some embodiments," "in one embodiment," or "in an embodiment," or the like, in places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. Thus, a particular feature, structure, or characteristic illustrated or described in connection with one embodiment may be combined, in whole or in part, with features, structures, or characteristics of one or more other embodiments without presuming that such combination is not an illogical or functional limitation. Any directional references (e.g., plus, minus, upper, lower, upward, downward, left, right, leftward, rightward, top, bottom, above …, below …, vertical, horizontal, clockwise, and counterclockwise) are used for identification purposes to aid the reader's understanding of the present disclosure, and do not create limitations, particularly as to the position, orientation, or use of the embodiments.
Although certain embodiments have been described above with a certain degree of particularity, those skilled in the art could make numerous alterations to the disclosed embodiments without departing from the scope of this disclosure. Joinder references (e.g., attached, coupled, connected, and the like) are to be construed broadly and may include intermediate members between a connection of elements and relative movement between elements. Thus, connection references do not necessarily imply that two elements are directly connected/coupled and in a fixed relationship to each other. The use of "for example" throughout this specification should be interpreted broadly and used to provide non-limiting examples of embodiments of the disclosure, and the disclosure is not limited to such examples. It is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative only and not limiting. Changes in detail or structure may be made without departing from the disclosure.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A multi-function signal conversion circuit, comprising:
a first signal input module configured to receive a Type-C signal;
a second signal input module configured to receive a DP signal;
a third signal input module configured to receive an HDMI signal;
a signal conversion module connected to the first signal input module, the second signal input module, and the third signal input module, and configured to convert at least one of the Type-C signal, the DP signal, and the HDMI signal into an audio/video control signal;
the signal protection module is connected with the signal conversion module and is configured to carry out encryption transmission on the audio and video control signal;
the signal decoding module is connected with the signal protection module and is configured to decode the encrypted audio and video control signal; and
and the video communication module is connected between the signal decoding module and the mobile terminal, is configured to receive display identification data sent by the mobile terminal, converts the decoded audio and video control signal into a differential video signal according to the display identification data, and uploads the differential video signal to the mobile terminal.
2. The multi-function signal conversion circuit of claim 1, wherein said display identification data comprises: a resolution of the mobile terminal and a signal transmission rate supported by the mobile terminal.
3. The multi-function signal conversion circuit of claim 1, further comprising:
a power input module configured to receive a first power signal;
the first voltage reduction module is connected with the power input module and configured to reduce the voltage of the first power signal to obtain a second power signal;
the second voltage reduction module is connected with the power input module and configured to perform voltage reduction processing on the first power signal to obtain a third power signal;
a first power processing module connected to at least one of the first signal input module, the second signal input module, the third signal input module, the signal conversion module, the signal protection module, the signal decoding module, and the video communication module, connected to the first voltage reduction module, and configured to perform voltage stabilization and filtering on the second power signal; and
and the second power supply processing module is connected with at least one of the first signal input module, the second signal input module, the third signal input module, the signal conversion module, the signal protection module, the signal decoding module and the video communication module, is connected with the second voltage reduction module, and is configured to perform voltage stabilization processing and filtering processing on the third power supply signal.
4. The multi-function signal conversion circuit of claim 3, wherein the first voltage-reduction module comprises:
the voltage-reducing circuit comprises a first voltage-reducing chip, a first capacitor, a second capacitor, a third capacitor, a first inductor, a first resistor and a second resistor;
a power input pin of the first buck chip and a first end of the first capacitor are connected to the power input module in common, and a ground pin of the first buck chip and a second end of the first capacitor are connected to ground in common;
a switch control pin of the first buck chip is connected with a first end of the first inductor, a first end of the second capacitor, a first end of the first resistor and a first end of the second resistor are connected with a voltage feedback pin of the first buck chip in a shared mode, and a second end of the first resistor is grounded;
the second end of the first inductor, the second end of the second capacitor, the second end of the second resistor and the first end of the third capacitor are connected to the first power supply processing module in common;
and the second end of the third capacitor is grounded.
5. The multi-function signal conversion circuit of claim 3, wherein said first power processing module comprises:
a first direct current transmission bus and a plurality of first power supply processing units;
the first direct current transmission bus is connected with the first voltage reduction module;
each first power supply processing unit comprises a plurality of first energy storage capacitors connected in parallel;
in each of the first power processing units, first ends of the plurality of first energy storage capacitors are commonly connected to the first dc transmission bus, second ends of the plurality of first energy storage capacitors are commonly connected to ground, the first ends of the plurality of first energy storage capacitors are commonly connected to form a power output end of the first power processing unit, and the power output end of the first power processing unit is connected to at least one of the first signal input module, the second signal input module, the third signal input module, the signal conversion module, the signal protection module, the signal decoding module, and the video communication module.
6. The multi-function signal conversion circuit of claim 1, wherein said second signal input module comprises:
the first signal conversion chip, the crystal oscillator chip, the fourth capacitor and the fifth capacitor are connected in series;
the signal input pins of the first signal conversion chip receive the DP signals through a resistor respectively;
the signal output pin of the first signal conversion chip is connected with the signal conversion module;
the grounding pin of the crystal oscillator chip is grounded;
a first signal input and output pin of the crystal oscillator chip and a first end of the fourth capacitor are connected to an oscillation signal input pin of the first signal conversion chip in a shared mode, and a second end of the fourth capacitor is grounded;
and a second signal input/output pin of the crystal oscillator chip and a first end of the fifth capacitor are connected to an oscillation signal output pin of the first signal conversion chip in a shared mode, and a second end of the fifth capacitor is grounded.
7. The multi-function signal conversion circuit of claim 1, wherein the first signal input module comprises:
the signal compression unit is connected with the signal conversion module and is configured to receive and compress and transmit the Type-C signal; and
and the first signal protection unit is connected with the signal compression unit and is configured to perform hot plug protection on the Type-C signal.
8. The multi-function signal conversion circuit of claim 1, wherein said third signal input module comprises:
the signal monitoring unit is connected with the signal conversion module and is configured to detect whether the HDMI signal is accessed or not, and when the HDMI signal is accessed, the signal monitoring unit monitors and transmits the HDMI signal;
the second signal protection unit is connected with the signal monitoring unit and is configured to perform hot plug protection on the HDMI signal; and
a timing unit connected with the signal monitoring unit and configured to output a timing signal.
9. The multi-function signal conversion circuit of claim 1, wherein the mobile terminal comprises at least one of a cell phone and a tablet computer.
10. A multi-function signal conversion system, comprising:
a multi-function signal conversion circuit as claimed in any one of claims 1-9; and
and the signal storage equipment is connected with the multifunctional signal conversion circuit and used for storing and outputting the Type-C signal, the DP signal and the HDMI signal.
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| CN110392217A (en) * | 2019-07-01 | 2019-10-29 | 深圳市显盈科技股份有限公司 | A kind of multifunctional signal conversion circuit and multifunctional signal converting system |
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