CN117997333A

CN117997333A - Control signal transmission circuit, vehicle-mounted electronic equipment and vehicle

Info

Publication number: CN117997333A
Application number: CN202410396873.2A
Authority: CN
Inventors: 郑玺来; 郑柏林; 熊进松
Original assignee: Ningbo Joynext Technology Corp
Current assignee: Ningbo Joynext Technology Corp
Priority date: 2024-04-03
Filing date: 2024-04-03
Publication date: 2024-05-07
Anticipated expiration: 2044-04-03
Also published as: CN117997333B

Abstract

The application discloses a control signal transmission circuit, vehicle-mounted electronic equipment and a vehicle, and relates to the technical field of electronic circuits. The circuit comprises: the passive transmission module, the active transmission module and the enabled power supply module; the passive transmission first port of the passive transmission module is electrically connected with the active transmission second port of the active transmission module and then is used as an I/O transmission port of the control signal transmission circuit, the passive transmission second port of the passive transmission module is used as a passive output port of the control signal transmission circuit, the active transmission first port of the active transmission module is electrically connected with the enabling power supply first port of the enabling power supply module and then is used as an enabling signal port of the control signal transmission circuit, and the active transmission third port of the active transmission module is electrically connected with the enabling power supply second port of the enabling power supply module. By implementing the technical scheme disclosed by the application, the signal of bidirectional transmission can be multiplexed with a single hard wire; hard wire resources are saved, and wiring space is saved; the cost of the components is reduced.

Description

Control signal transmission circuit, vehicle-mounted electronic equipment and vehicle

Technical Field

The present application relates to the field of electronic circuits, and in particular, to a control signal transmission circuit, a vehicle-mounted electronic device, and a vehicle.

Background

Along with the development of the automobile industry, the intelligent driving and cabin technology is widely integrated into the current automobile manufacture, and all vehicle-mounted electronic devices are cooperatively matched through mutual signal transmission, so that the driving experience with high safety and high comfort level is brought to passengers. As the number of transmission lines as signal transmission carriers has increased greatly with the increase of in-vehicle electronic devices, the pressure to equip more electronic devices in a limited space has increased. Common transmission lines include electronic circuits cured on PCBs (Printed Circuit Board, printed circuit boards), hard wires connected between devices, and the like. The increase of the number of the electronic circuits increases the area of the PCB, which is not beneficial to the miniaturization of the equipment; the hard wire occupies a larger volume, and meanwhile, connectors are required to be equipped to communicate signal paths among the PCBs of the devices, so that the application of excessive hard wire resources can affect the devices which are connected with each other, so that the design planning of the whole vehicle is affected.

Taking the sleep/wake-up function of the electronic equipment of the vehicle as an example, in order to reduce the overall energy consumption of the vehicle, the electronic equipment enters a sleep state when not working; in the sleep state, the device may be awakened by the wake-up control signal if the device is to be enabled. For example: the MCU (Microcontroller Unit, micro control unit) can be awakened when receiving an awakening control signal sent by the safety air bag sensor in a dormant state, so as to trigger an emergency call; the MCU can also actively send out a wake-up control signal to activate other dormancy equipment. In order to realize the functions, two control signal paths of active awakening and passive awakening are generally arranged between the MCU and external equipment, so that the pressure of hard wire resources is increased intangibly. Therefore, how to integrate the control signal transmission paths, to alleviate the dependence of the bi-directional transmission control signals on hardware resources, and to save precious space resources is a problem to be solved at present.

Disclosure of Invention

In order to realize the bidirectional transmission of the control signals by the single-channel control signal transmission path, the application provides the following technical scheme.

In a first aspect, there is provided a control signal transmission circuit, the control signal transmission circuit having: the device comprises an I/O transmission port, a passive output port, an enabling signal port and a power supply port, wherein the I/O transmission port is used for being electrically connected with a single-channel signal transmission line;

The control signal transmission circuit includes: the passive transmission module, the active transmission module and the enabled power supply module;

The passive transmission module has: passively transmitting the first port and passively transmitting the second port;

The active transmission module has: actively transmitting the first port, actively transmitting the second port, and actively transmitting the third port;

the power supply enabling module has: enabling the power supply first port, enabling the power supply second port, and enabling the power supply third port;

The passive transmission first port is electrically connected with the active transmission second port and then serves as an I/O transmission port, the passive transmission second port serves as a passive output port, the active transmission first port is electrically connected with the enabling power supply first port and then serves as an enabling signal port, the active transmission third port is electrically connected with the enabling power supply second port, and the enabling power supply third port serves as a power supply port.

Further, the passive transmission module includes: the first diode, the first composite tube, the first resistor, the second resistor, the third resistor and the fourth resistor;

the first composite tube has: the device comprises a first composite pipe first pin, a first composite pipe second pin, a first composite pipe third pin, a first composite pipe fourth pin, a first composite pipe fifth pin and a first composite pipe sixth pin;

The cathode of the first diode is used as a passive transmission first port, is connected with a first resistor in series and then grounded, and the anode of the first diode is electrically connected with one end of a second resistor and then is electrically connected with a fifth pin of the first composite tube;

the other end of the second resistor is electrically connected with one end of the third resistor and then is electrically connected with a fourth pin of the first composite tube;

The other end of the third resistor is electrically connected with a sixth pin of the first composite tube, and the sixth pin of the first composite tube is used as a passive transmission second port;

The second pin of the first composite tube is electrically connected with the third pin of the first composite tube and then is electrically connected with one end of the fourth resistor, and the other end of the fourth resistor is electrically connected with the first pin of the first composite tube and then is grounded.

Further, the first composite tube includes: a third transistor and a fourth transistor;

The third transistor has: a third transistor first pole, a third transistor second pole, a third transistor third pole;

the fourth transistor has: a fourth transistor first pole, a fourth transistor second pole, a fourth transistor third pole;

The first electrode of the third transistor is used as a fifth pin of the first composite transistor, the second electrode of the third transistor is used as a fourth pin of the first composite transistor, the third electrode of the third transistor is used as a third pin of the first composite transistor, the first electrode of the fourth transistor is used as a second pin of the first composite transistor, the second electrode of the fourth transistor is used as a first pin of the first composite transistor, and the third electrode of the fourth transistor is used as a sixth pin of the first composite transistor;

the third transistor first pole is of a different majority carrier type than the fourth transistor first pole.

Further, the control signal transmission circuit further includes: eleventh resistor, twelfth resistor, thirteenth resistor, first capacitor, second capacitor;

The eleventh resistor is connected in series between the anode of the first diode and the fifth pin of the first composite tube to replace the electrical connection between the anode of the first diode and the fifth pin of the first composite tube,

The anode of the first diode is connected in series with a first capacitor and then grounded;

The sixth pin of the first composite tube is sequentially connected with a twelfth resistor and a second capacitor in series and then grounded,

The connection part of the twelfth resistor and the second capacitor replaces the sixth pin of the first composite tube and is used as a passive transmission second port;

The second pin of the first composite tube is connected with the thirteenth resistor in series and then is electrically connected with the third pin of the first composite tube so as to replace the electrical connection between the second pin of the first composite tube and the third pin of the first composite tube.

Further, the active transmission module includes: the second diode, the second composite tube, the fifth resistor, the sixth resistor, the seventh resistor and the eighth resistor;

The second composite tube has: the device comprises a first pin of a second composite tube, a second pin of the second composite tube, a third pin of the second composite tube, a fourth pin of the second composite tube, a fifth pin of the second composite tube and a sixth pin of the second composite tube;

The fifth pin of the second composite pipe is used as an active transmission first port, is connected in series with a fifth resistor and then is grounded;

the fifth pin of the second composite pipe is electrically connected with the fourth pin of the second composite pipe after being connected with a sixth resistor in series;

the sixth pin of the second composite tube is used as an active transmission second port, and is electrically connected with the cathode of the second diode after being connected with the seventh resistor in series, and the anode of the second diode is used as an active transmission third port;

The second pin of the second composite tube is connected with the third pin of the second composite tube in series and then is electrically connected with one end of the eighth resistor, and the other end of the eighth resistor is connected with the first pin of the second composite tube and then is grounded.

Further, the second composite tube includes: a fifth transistor, a sixth transistor;

The fifth transistor has: a fifth transistor first pole, a fifth transistor second pole, a fifth transistor third pole;

The sixth transistor has: a sixth transistor first pole, a sixth transistor second pole, a sixth transistor third pole;

The first electrode of the fifth transistor is used as a fifth pin of the second composite transistor, the second electrode of the fifth transistor is used as a fourth pin of the second composite transistor, the third electrode of the fifth transistor is used as a third pin of the second composite transistor, the first electrode of the sixth transistor is used as a second pin of the second composite transistor, the second electrode of the sixth transistor is used as a first pin of the second composite transistor, and the third electrode of the sixth transistor is used as a sixth pin of the second composite transistor;

the fifth transistor first pole is of a different majority carrier type than the sixth transistor first pole.

Further, the control signal transmission circuit further includes: a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a third capacitor;

The fifth pin of the second composite tube is serially connected with a fourteenth resistor and a fifth resistor in sequence and then grounded so as to replace the fifth pin of the second composite tube to be serially connected with the fifth resistor and then grounded;

The connection part of the fourteenth resistor and the fifth resistor replaces a fifth pin of the second composite tube and is used as an active transmission first port;

One end of the fifteenth resistor is electrically connected with a sixth pin of the second composite tube, and the other end of the fifteenth resistor replaces the sixth pin of the second composite tube to serve as an active transmission second port;

one end of the third capacitor is electrically connected with a sixth pin of the second composite tube, and the other end of the third capacitor is grounded;

the second pin of the second composite tube is electrically connected with the third pin of the second composite tube after being connected with the sixteenth resistor in series so as to replace the electrical connection between the second pin of the second composite tube and the third pin of the second composite tube.

Further, the enabling power module includes: a first transistor, a second transistor, a ninth resistor, and a tenth resistor;

the first transistor has: a first transistor first pole, a first transistor second pole, a first transistor third pole;

the second transistor has: a second transistor first pole, a second transistor second pole, a second transistor third pole;

A first electrode of the first transistor is used as an enabling power supply first port, and a second electrode of the first transistor is grounded; the third electrode of the first transistor is connected in series with the tenth resistor and then is electrically connected with the first electrode of the second transistor, the first electrode of the second transistor is electrically connected with one end of the ninth resistor, the other end of the ninth resistor is electrically connected with the third electrode of the second transistor and then is used as an enabling power supply third port, and the second electrode of the second transistor is used as an enabling power supply second port.

Further, the control signal transmission circuit further includes: seventeenth resistor, fourth capacitor, fifth capacitor, sixth capacitor and seventh capacitor;

one end of the seventeenth resistor replaces the first pole of the first transistor and is used as an enabling power supply first port, and the other end of the seventeenth resistor is electrically connected with the first pole of the first transistor;

one end of the fourth capacitor is electrically connected with the third electrode of the second transistor, and the other end of the fourth capacitor is grounded;

The fifth capacitor is connected with the ninth resistor in parallel;

One end of the sixth capacitor is electrically connected with the second electrode of the second transistor, and the other end of the sixth capacitor is grounded;

the seventh capacitor is connected in parallel with the sixth capacitor.

Further, the control signal transmission circuit is electrically connected with the micro control unit and the first power supply;

The micro control unit has: micro-controlling the first port, the second port and the third port;

the first power supply has: a power supply first port, a power supply second port;

The micro-control first port is electrically connected with the passive output port, the micro-control second port is electrically connected with the enabling signal port, the micro-control third port is electrically connected with the power supply first port, and the power supply second port is electrically connected with the power supply port.

A second aspect provides a control signal transmission method applied to the control signal transmission circuit described in the first aspect, the method comprising:

responding to the I/O transmission port to receive a passive control signal transmitted by a single-channel signal transmission line, and transmitting a corresponding control signal to the micro control unit through a passive transmission second port;

And responding to the micro control unit to send out a control enabling signal through the micro control second port, and sending out a corresponding active control signal to the single-path signal transmission line through the I/O transmission port.

In a third aspect, a circuit board is provided, including the control signal transmission circuit according to the first aspect, where an I/O transmission port of the control signal transmission circuit is electrically connected to a single-path signal transmission line.

Further, the circuit board is a printed circuit board;

the control signal transmission circuit is solidified on the circuit board;

When the single-channel signal transmission line is a single hard line, the circuit board further comprises a connector, and the connector is at least provided with I/O signal pins;

the connector is assembled on the circuit board and is electrically connected with the single hard wire through the I/O transmission port of the I/O signal pin connection control signal transmission circuit.

A fourth aspect provides an in-vehicle electronic apparatus including the circuit board recited in the third aspect, the circuit board including the control signal transmission circuit recited in the first aspect;

The I/O transmission port of the control signal transmission circuit is electrically connected with external electronic equipment through a single-channel signal transmission line; the vehicle-mounted electronic equipment at least comprises a T-BOX; the single-channel signal transmission line at least comprises a hard wire and a copper wire arranged on the circuit board; the external electronic equipment at least comprises one of the following: airbag, audio amplifier, IVI, bluetooth chip.

A fifth aspect provides a vehicle, including the in-vehicle electronic device of the fourth aspect, a single-channel signal transmission line, and an external electronic device;

The vehicle-mounted electronic equipment is provided with an I/O transmission port, and the I/O transmission port is electrically connected with the external electronic equipment through a single-channel signal transmission line; the vehicle-mounted electronic equipment at least comprises a T-BOX; the single-channel signal transmission line at least comprises a hard wire and a copper wire arranged on the circuit board; the external electronic equipment at least comprises one of the following: airbag, audio amplifier, IVI, bluetooth chip.

The technical scheme provided by the embodiment of the application has the beneficial effects that:

1. by implementing the control signal transmission circuit, the transmission method, the circuit board, the vehicle-mounted electronic equipment and the vehicle, which are recorded in the embodiment of the application, a single hard wire can be multiplexed when the control signal is transmitted in a bidirectional manner;

2. Hard wire resources are saved, and wiring space is saved;

3. The cost of the components is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of a control signal transmission circuit according to an embodiment of the present application;

Fig. 2 is a schematic diagram of a passive transmission module according to an embodiment of the present application;

Fig. 3 is a schematic diagram of an active transmission module according to an embodiment of the present application;

FIG. 4 is a schematic diagram of an enabling power module according to an embodiment of the present application;

FIG. 5 is a schematic view of a first composite pipe according to an embodiment of the present application;

FIG. 6 is a schematic view of a second composite pipe according to an embodiment of the present application;

Fig. 7 is a schematic diagram of another passive transmission module according to an embodiment of the present application;

fig. 8 is a schematic diagram of another active transmission module according to an embodiment of the present application;

FIG. 9 is a schematic diagram of another power-enabled module provided by an embodiment of the present application;

fig. 10 is a schematic diagram of connection between a control signal transmission circuit and a micro control unit and between a first power supply according to an embodiment of the present application;

fig. 11 is a schematic diagram of a control signal transmission method according to an embodiment of the present application.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some examples of the present application, not all examples. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a," "an," or "the" and similar terms do not denote a limitation of quantity, but rather denote the presence of at least one. The numerals in the drawings of the specification merely denote distinction of respective functional components or modules, and do not denote logical relationships between the components or modules. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

For the component symbol referred to in the present specification, the type of component is referred to in the circuit diagram, and the individual components are distinguished, for example: r ₁,R₂, C, etc.; the sizes of the corresponding physical quantities of the components are represented in the corresponding formulas, and are distinguished by italics, for example: the resistance R ₁ corresponds to the resistance R ₁.

Hereinafter, various embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. Note that in the drawings, the same reference numerals are given to constituent parts having substantially the same or similar structures and functions, and repeated description thereof will be omitted.

Today automobiles have increasingly stringent requirements for space, and in particular T-BOX has higher requirements for space volume, resulting in a shortage of ISO harness connectors, hard wire resources. In order to save hard wire resources, a control signal transmitted in two directions is transmitted through a single hard wire, and the application provides the following control signal transmission circuit:

In some embodiments, as shown in fig. 1, a control signal transmission circuit 100 has: an I/O transmission port 101, a passive output port 102, an enable signal port 103, and a power supply port 104, wherein the I/O transmission port 101 is electrically connected to a single signal transmission line;

The control signal transmission circuit 100 includes: a passive transmission module 110, an active transmission module 120, and an enabled power supply module 130;

The passive transport module 110 has: passively transmitting the first port 111, passively transmitting the second port 112;

the active transmission module 120 has: actively transmitting the first port 121, actively transmitting the second port 122, actively transmitting the third port 123;

the power supply enabling module 130 has: enabling the power supply first port 131, enabling the power supply second port 132, and enabling the power supply third port 133;

The passive transmission first port 111 is electrically connected to the active transmission second port 122 to serve as the I/O transmission port 101, the passive transmission second port 112 is served as the passive output port 102, the active transmission first port 121 is electrically connected to the power supply enabling first port 131 to serve as the enable signal port 103, the active transmission third port 123 is electrically connected to the power supply enabling second port 132, and the power supply enabling third port 133 is served as the power supply source 104.

The single-pass signal transmission line can be a metallized trace cured on the PCB; or may be a hard-wired for transmitting signals. The hard line according to the present application refers to a signal line defined in the ISO6722 standard.

When the control signal transmission circuit 100 receives the passive control signal transmitted by the single-channel signal transmission line through the I/O transmission port 101, a corresponding control signal is output through the passive output port 102. Typically, connected to the passive output port 102 is a micro-control unit, to which control signals are transmitted and which control the micro-control unit to perform further operations.

Taking wake-up control signals as an example: the passive wake-up control signal refers to a signal of an external device or an external sensor to wake up the micro control unit in a sleep state. For example, when the micro control unit is dormant, the car body sensor senses collision, and then a passive wake-up control signal is sent through a single hard wire to wake up the micro control unit, so that subsequent means such as emergency call and the like are executed.

Similarly, in response to the micro control unit issuing a control enable signal through the micro control second port, an active control signal is issued by the I/O transmission port. Taking the example that the micro control unit wakes up the external device: when the micro control unit needs to actively wake up a certain external device, the micro control unit sends an active wake-up control signal through the enabling signal port 103, and the control signal transmission circuit 100 receives the active wake-up control signal and wakes up the corresponding device through the I/O transmission port 101. The active wake-up control signal refers to a signal that the micro control unit wakes up the external device in the sleep state. For example, wake up a microphone in a car, play music, etc.

The I/O transmission port 101 may bidirectionally transmit control signals, and the bidirectionally transmitted control signals are all transmitted through a single signal transmission line. By multiplexing the single-channel signal transmission line, hardware resources are saved, wiring space is saved, and cost of components is further reduced.

In other embodiments, as shown in fig. 2, the passive transport module 110 includes: a first diode D ₁, a first composite tube T ₁₀₀, a first resistor R ₁, a second resistor R ₂, a third resistor R ₃, and a fourth resistor R ₄; the first composite tube T ₁₀₀ has: a first composite tube first pin T ₁₀₁, a first composite tube second pin T ₁₀₂, a first composite tube third pin T ₁₀₃, a first composite tube fourth pin T ₁₀₄, a first composite tube fifth pin T ₁₀₅, a first composite tube sixth pin T ₁₀₆; the cathode of the first diode D ₁ is used as a passive transmission first port 111, the cathode of the first diode D ₁ is connected in series with a first resistor R ₁ and then grounded, and the anode of the first diode D ₁ is electrically connected with one end of a second resistor R ₂ and then is electrically connected with a fifth pin T ₁₀₅ of the first composite tube; the other end of the second resistor R ₂ is electrically connected with one end of the third resistor R ₃ and then is electrically connected with a fourth pin T ₁₀₄ of the first composite tube; the other end of the third resistor R ₃ is electrically connected with a sixth pin T ₁₀₆ of the first composite tube, and the sixth pin T ₁₀₆ of the first composite tube is used as the passive transmission second port 112; the second pin T ₁₀₂ of the first composite tube is electrically connected with the third pin T ₁₀₃ of the first composite tube and then is electrically connected with one end of the fourth resistor R ₄, and the other end of the fourth resistor R ₄ is electrically connected with the first pin T ₁₀₁ of the first composite tube and then is grounded.

The fourth pin T ₁₀₄ of the first composite pipe is used for being connected with the second power source Pwr 2. Preferably, the second power source Pwr2 is a 3.3V power source, and is used to provide an operating voltage for the transistors in the passive transmission module 110, and is also used to provide an operating voltage for the internal modules of the micro control unit. The second power source Pwr2 may be obtained by converting the output voltage of the battery by a voltage conversion circuit. The specific implementation of the second power Pwr2 voltage is not limited in the present application.

The passive transmission module receives signals from the passive transmission first port and transmits corresponding signals from the passive transmission second port to the equipment connected with the passive transmission module.

In other embodiments, as shown in fig. 3, the active transmission module 120 includes: the second diode D ₂, the second composite tube T ₂₀₀, the fifth resistor R ₅, the sixth resistor R ₆, the seventh resistor R ₇ and the eighth resistor R ₈; the second composite tube T ₂₀₀ has: a second composite tube first pin T ₂₀₁, a second composite tube second pin T ₂₀₂, a second composite tube third pin T ₂₀₃, a second composite tube fourth pin T ₂₀₄, a second composite tube fifth pin T ₂₀₅, and a second composite tube sixth pin T ₂₀₆; the fifth pin T ₂₀₅ of the second composite tube is used as an active transmission first port 121, and the fifth pin T ₂₀₅ of the second composite tube is connected in series with a fifth resistor R ₅ and then grounded; the fifth pin T ₂₀₅ of the second composite pipe is electrically connected with the fourth pin T ₂₀₄ of the second composite pipe after being connected with the sixth resistor R ₆ in series; the sixth pin T ₂₀₆ of the second composite tube is used as an active transmission second port 122, the sixth pin T ₂₀₆ of the second composite tube is connected with the cathode of the second diode D ₂ after being connected with the seventh resistor R ₇ in series, and the anode of the second diode D ₂ is used as an active transmission third port 123; the second pin T ₂₀₂ of the second composite tube is connected in series with the third pin T ₂₀₃ of the second composite tube and then is electrically connected with one end of the eighth resistor R ₈, and the other end of the eighth resistor R ₈ is electrically connected with the first pin T ₂₀₁ of the second composite tube and then is grounded.

The fourth pin T ₂₀₄ of the second composite pipe is used for being connected with a second power source Pwr 2. The second power source Pwr2 provides an operating voltage to the transistors in the active transport module 120.

The passive transmission module receives signals from the enabling signal port and transmits corresponding signals to the equipment connected with the passive transmission module from the active transmission second port.

In other embodiments, as shown in fig. 4, the enabled power module 130 includes: a first transistor T ₁, a second transistor T ₂, a ninth resistor R ₉, a tenth resistor R ₁₀. The first transistor T ₁ has: a first transistor first pole T ₁₁, a first transistor second pole T ₁₂, a first transistor third pole T ₁₃; the second transistor T ₂ has: a first pole T ₂₁ of the second transistor, a second pole T ₂₂ of the second transistor, and a third pole T ₂₃ of the second transistor. First transistor first pole T ₁₁ is grounded as enable supply first port 131, first transistor second pole T ₁₂; the third electrode T ₁₃ of the first transistor is electrically connected to the tenth resistor R ₁₀ in series and then electrically connected to the first electrode T ₂₁ of the second transistor, the first electrode T ₂₁ of the second transistor is electrically connected to one end of the ninth resistor R ₉, the other end of the ninth resistor R ₉ is electrically connected to the third electrode T ₂₃ of the second transistor and then serves as the third power supply enabling port 133, and the second electrode T ₂₂ of the second transistor serves as the second power supply enabling port 132.

The components contained in the enabling power supply module and the connection relation among the components are explained, so that the function that the enabling power supply second port supplies power to the active transmission module when the enabling power supply module receives an enabling signal from the enabling power supply first port under the condition that the third port can be powered on is realized.

Optionally, the first transistor T ₁ is an N-channel MOSFET, and the second transistor T ₂ is a PNP transistor.

Preferably, the first transistor T ₁ is an NPN triode, the first transistor first pole T ₁₁ is a base, the first transistor second pole T ₁₂ is an emitter, and the first transistor third pole T ₁₃ is a collector; the second transistor T ₂ is a P-channel MOSFET, the first pole T ₂₁ of the second transistor is a gate, the second pole T ₂₂ of the second transistor is a drain, and the third pole T ₂₃ of the second transistor is a source.

The second transistor third pole T ₂₃ also serves as an enable supply third port 133 for connection to the battery positive pole, which is typically grounded. When the power-enabled first port 131 receives a high level, a corresponding output high level is provided to the power-enabled second port 132. The output voltage of the battery is usually 11 to 15V, preferably 12V. After the second transistor T ₂ is turned on, the second power supply enabling port 132 outputs a voltage corresponding to the positive voltage of the battery, and under the condition that the conduction voltage drop is not counted, the voltage output by the second power supply enabling port 132 is the positive voltage of the battery.

In other embodiments, as shown in fig. 5, the first composite tube T ₁₀₀ includes: a third transistor T ₃, a fourth transistor T ₄;

The third transistor T ₃ has: a third transistor first pole T ₃₁, a third transistor second pole T ₃₂, a third transistor third pole T ₃₃; the fourth transistor T ₄ has: a fourth transistor first pole T ₄₁, a fourth transistor second pole T ₄₂, and a fourth transistor third pole T ₄₃.

The third transistor first pole T ₃₁ is taken as a first compound transistor fifth pin T ₁₀₅, the third transistor second pole T ₃₂ is taken as a first compound transistor fourth pin T ₁₀₄, the third transistor third pole T ₃₃ is taken as a first compound transistor third pin T ₁₀₃, the fourth transistor first pole T ₄₁ is taken as a first compound transistor second pin T ₁₀₂, the fourth transistor second pole T ₄₂ is taken as a first compound transistor first pin T ₁₀₁, and the fourth transistor third pole T ₄₃ is taken as a first compound transistor sixth pin T ₁₀₆;

The third transistor first pole T ₃₁ is different from the fourth transistor first pole T ₄₁ in the majority carrier type; the first composite tube is an important device for realizing the logic function of the passive transmission module circuit.

In other embodiments, as shown in fig. 6, the second composite tube T ₂₀₀ includes: a fifth transistor T ₅, a sixth transistor T ₆;

The fifth transistor T ₅ has: a fifth transistor first pole T ₅₁, a fifth transistor second pole T ₅₂, a fifth transistor third pole T ₅₃; the sixth transistor T ₆ has: a sixth transistor first pole T ₆₁, a sixth transistor second pole T ₆₂, and a sixth transistor third pole T ₆₃.

The fifth transistor first pole T ₅₁ is taken as a second composite transistor fifth pin T ₂₀₅, the fifth transistor second pole T ₅₂ is taken as a second composite transistor fourth pin T ₂₀₄, the fifth transistor third pole T ₅₃ is taken as a second composite transistor third pin T ₂₀₃, the sixth transistor first pole T ₆₁ is taken as a second composite transistor second pin T ₂₀₂, the sixth transistor second pole T ₆₂ is taken as a second composite transistor first pin T ₂₀₁, and the sixth transistor third pole T ₆₃ is taken as a second composite transistor sixth pin T ₂₀₆;

A fifth transistor first pole T ₅₁, which is different from the majority carrier type of the sixth transistor first pole T ₆₁; the second composite tube is an important device for realizing the logic function of the active transmission module circuit.

In some embodiments, the third transistor T ₃ is a P-channel enhancement MOSFET, the third transistor first pole T ₃₁ is a gate, the third transistor second pole T ₃₂ is a source, and the third transistor third pole T ₃₃ is a drain; the fourth transistor T ₄ is an N-channel enhancement MOSFET, the first transistor is a gate of T ₄₁, the second transistor is a source of T ₄₂, and the third transistor is a drain of T ₄₃; the fifth transistor T ₅ is a P-channel enhancement MOSFET, the fifth transistor first pole T ₅₁ is a gate, the fifth transistor second pole T ₅₂ is a source, and the fifth transistor third pole T ₅₃ is a drain; the sixth transistor T ₆ is an N-channel enhancement MOSFET, the first transistor is a gate of T ₆₁, the second transistor is a source of T ₆₂, and the third transistor is a drain of T ₆₃.

Preferably, the third transistor T ₃ is a PNP transistor, the first pole T ₃₁ of the third transistor is a base, the second pole T ₃₂ of the third transistor is an emitter, the third pole T ₃₃ of the third transistor is a collector, the fourth transistor T ₄ is an NPN transistor, the first pole T ₄₁ of the fourth transistor is a base, the second pole T ₄₂ of the fourth transistor is an emitter, and the third pole T ₄₃ of the fourth transistor is a collector; the fifth transistor T ₅ is a PNP transistor, the first pole T ₅₁ of the fifth transistor is a base, the second pole T ₅₂ of the fifth transistor is an emitter, the third pole T ₅₃ of the fifth transistor is a collector, the sixth transistor T ₆ is an NPN transistor, the first pole T ₆₁ of the sixth transistor is a base, the second pole T ₆₂ of the sixth transistor is an emitter, and the third pole T ₆₃ of the sixth transistor is a collector.

The control signal transmission circuit 100 is connected to a power supply, and the logic function of the control signal transmission circuit 100 is operated normally. The power third port 133 and the second power port 302 will be enabled for the control signal transmission circuit power up. The second power source Pwr2 is connected to the first composite pipe fourth pin T ₁₀₄ and the second composite pipe fourth pin T ₂₀₄. Preferably, the second power port 302 outputs 12V voltage; the second power source Pwr2 supplies a voltage of 3.3V. The 12V voltage can be provided by the positive electrode of the storage battery, and can also be output by carrying out direct-current voltage conversion on the positive electrode voltage of the storage battery. Common dc voltage conversion means include: the present application is not limited by using a DC-DC converter, LDO, etc.

Next, the operation principle of the signal transmission circuit 100 will be described by taking a wake-up control signal as an example. When the micro control unit is in a low power consumption or sleep state, the single hard wire carrying bidirectional signal transmission maintains low level transmission to the I/O transmission port 101, the passive transmission first port 111 is low level, the first diode D ₁ is turned on, and the voltage of the fifth pin T ₁₀₅ of the first composite tube is pulled down. At this time, the third transistor T ₃ in the first composite transistor T ₁₀₀ is turned on under the low level of the first electrode T ₃₁ of the third transistor, so that the high level of the second power source Pwr2 is transmitted to the third electrode T ₃₃ of the third transistor through the second electrode T ₃₂ of the third transistor, and acts on the first electrode T ₄₀₁ of the fourth transistor, so that the fourth transistor T ₄ is turned on, the second port 112 is passively transmitted to output the low level signal, and the low level signal is transmitted to the micro control unit through the passive output port 102. Since the wake-up control signal is active high, the micro-control unit cannot be woken up at this time.

The micro control unit is in a dormant state and is awakened by an external signal to be in passive awakening. At this time, the passive wake-up control signal transmitted by the single hard wire is transmitted to the passive transmission first port 111 through the I/O transmission port 101, the first diode D ₁ is turned off, the first composite tube fifth pin T ₁₀₅ is acted by the high level of the second power source Pwr2, and the third transistor T ₃ is turned off under the action of the high level of the first pole T ₃₁ of the third transistor, so as to turn off the fourth transistor T ₄, so that the passive transmission second port 112 obtains the high level. The high level signal is conducted to the micro control unit through the passive output port 102 to wake up the micro control unit in a sleep state.

When the micro control unit is in a normal working state, the micro control unit wakes up other external devices, and belongs to active wake-up. When the micro control unit needs to wake up the external device, a high level enable signal is sent out, and the enable signal port 103 is respectively conducted to the power supply enabling first port 131 and the active transmission first port 121. After the power supply enabling first port 131 receives the high level signal, the first transistor T ₁ is turned on under the action of the high level of the first pole T ₁₁ of the first transistor, so that the potential of the second pole T ₂₁ of the second transistor is pulled down, the second transistor T ₂ is turned on, and since the third pole T ₂₃ of the second transistor is connected to the positive electrode of the storage battery, the negative electrode of the storage battery is usually grounded, and in the case of the second transistor T ₂ being turned on, the second pole T ₂₂ of the second transistor outputs the positive electrode voltage of the storage battery, which is usually 12V.

The 12V voltage is transferred to the active transfer third port 123 via the enable supply second port 132, causing the second diode D ₂ to conduct. Meanwhile, the high-level enabling signal transmitted to the active transmission module 120 through the active transmission first port 121 acts on the fifth pin T ₂₀₅ of the second composite tube, so that the fifth transistor T ₅ is turned off, and further the sixth transistor T ₆ is turned off, the sixth pin T ₂₀₆ of the second composite tube presents a high-impedance state, the 12V voltage is transmitted to the active transmission second port 122 through the active transmission third port 123, and an active wake-up signal is sent to the external device through the I/O transmission port 101 through a single hard wire, so that the corresponding device is woken up.

The enable signal port 103 is maintained low when the micro control unit is in a normal operating state without waking up an external device. The low level is transmitted to the active transmission first port 121, so that the fifth pin T ₂₀₅ of the second composite tube receives the low level, the fifth transistor T ₅ is turned on under the action of the low level of the first pole T ₅₁ of the fifth transistor, so that the second power Pwr2 voltage is transmitted to the second pin T ₂₀₂ of the second composite tube at the high level, and the sixth transistor T ₆ is turned on under the action of the first pole T ₆₁ of the sixth transistor, so that the active transmission second port 122 outputs the low level and is transmitted to the corresponding external device via the hard wire. Since the signal to wake up the external device is high level, the external device remains in a sleep state under the action of the low level.

The passive wake-up control signal and the active wake-up control signal are transmitted through a hard wire, so that the transmission of a bidirectional high-level signal by one hard wire is realized.

Table 1 shows the circuit logic of the control signal transmission circuit disclosed in the present application. And in the corresponding working state, the level state of the relevant port is realized. In table 1, H represents a high level, and L represents a low level. Taking the positive voltage of the storage battery as 12V, the voltage amplitude of the high-level signal of the signal transmitted by the I/O transmission port 101 is 12V, the voltage amplitude of the high-level signal of the signal transmitted by the wake-up signal port 102 is 3.3V, the voltage amplitude of the high-level signal of the signal transmitted by the enable signal port 103 is 3.3V, and the voltage amplitude of the high-level signal transmitted by the enable power supply second port 132 is 12V as an example.

Table 1 control signal transmission circuit logic

It should be noted that, under the condition of normal operation, the micro control unit sends out a wake-up control signal, the wake-up control signal is converted by the control signal transmission circuit 100, and the I/O transmission port sends out an active wake-up control signal to wake up the corresponding external sleep device. At this time, the active wake-up control signal is still transmitted to the passive transmission module 110 through the passive transmission first port 111, and the passive transmission second port 112 transmits the passive transmission signal to the passive output port 102. But at this point the micro-control unit is already in a normal operating state where it has been woken up, so the active wake-up signal is not active for the micro-control unit that has been woken up.

The foregoing illustrates the basic circuit structure and circuit logic of the disclosed control signal transmission circuit 100. In order to ensure that the control signal transmission circuit has higher reliability during operation, in other preferred embodiments, the control signal transmission circuit 100 further includes: eleventh resistor R ₁₁, twelfth resistor R ₁₂, thirteenth resistor R ₁₃, fourteenth resistor R ₁₄, fifteenth resistor R ₁₅, sixteenth resistor R ₁₆, seventeenth resistor R ₁₇, first capacitor C ₁, second capacitor C ₂, third capacitor C ₃, fourth capacitor C ₄, fifth capacitor C ₅, sixth capacitor C ₆, and seventh capacitor C ₇. As shown in fig. 7, on the basis of fig. 2, an eleventh resistor R ₁₁ is connected in series between the anode of the first diode D ₁ and the fifth pin T ₁₀₅ of the first composite tube, so as to replace the electrical connection between the anode of the first diode D ₁ and the fifth pin T ₁₀₅ of the first composite tube, and the anode of the first diode D ₁ is connected in series with the first capacitor C ₁ and then grounded; the sixth pin of the first composite tube is connected in series with a twelfth resistor R ₁₂ and a second capacitor C ₂ in sequence and then grounded, and the joint of the twelfth resistor R ₁₂ and the second capacitor C ₂ replaces the sixth pin T ₁₀₆ of the first composite tube to serve as a passive transmission second port 112; the second pin T ₁₀₂ of the first composite tube is connected in series with the thirteenth resistor R ₁₃ and then is electrically connected with the third pin T ₁₀₃ of the first composite tube so as to replace the electrical connection between the second pin T ₁₀₂ of the first composite tube and the third pin T ₁₀₃ of the first composite tube.

Through the arrangement of the eleventh resistor R ₁₁, the twelfth resistor R ₁₂ and the thirteenth resistor R ₁₃, the working current of the passive transmission module 110 is limited in the safe working range of each electronic component; by setting the first capacitor C ₁ and the second capacitor C ₂, when the stable control signal transmission circuit 100 works, the first port 111 is passively transmitted, and the port voltage of the second port 112 is passively transmitted, so that signal false triggering caused by deviation of the port signal from the corresponding voltage is avoided.

As shown in fig. 8, on the basis of fig. 3, a fifth pin T ₂₀₅ of the second composite tube is serially connected with a fourteenth resistor R ₁₄ and a fifth resistor R ₅ in sequence and then grounded, so as to replace the fifth pin T ₂₀₅ of the second composite tube to be serially connected with the fifth resistor R ₅ and then grounded; the connection part of the fourteenth resistor R ₁₄ and the fifth resistor R ₅ replaces a fifth pin T ₂₀₅ of the second composite tube and is used as the active transmission first port 121; one end of the fifteenth resistor R ₁₅ is electrically connected with the sixth pin T ₂₀₆ of the second composite tube, and the other end of the fifteenth resistor R ₁₅ replaces the sixth pin T ₂₀₆ of the second composite tube to serve as the active transmission second port 122; one end of the third capacitor C ₃ is electrically connected with the sixth pin T ₂₀₆ of the second composite tube, and the other end of the third capacitor C ₃ is grounded; the second pin T ₂₀₂ of the second composite tube is connected in series with the sixteenth resistor R ₁₆ and then is electrically connected with the third pin T ₂₀₃ of the second composite tube so as to replace the electrical connection between the second pin T ₂₀₂ of the second composite tube and the third pin T ₂₀₃ of the second composite tube.

Through the arrangement of the fourteenth resistor R ₁₄, the fifteenth resistor R ₁₅ and the sixteenth resistor R ₁₆, the working current of the active transmission module 120 is limited so as to meet the safety working range of each component in the active transmission module 120; the output voltage of the second port 122 is actively transferred stably by the setting of the third capacitor C ₃.

As shown in fig. 9, on the basis of fig. 4, one end of the seventeenth resistor R ₁₇ replaces the first transistor first pole T ₁₁, and is used as the power supply enabling first port 131, and the other end of the seventeenth resistor R ₁₇ is electrically connected with the first transistor first pole T ₁₁; one end of the fourth capacitor C ₄ is electrically connected with the third electrode T ₂₃ of the second transistor, and the other end of the fourth capacitor C ₄ is grounded; the fifth capacitor C ₅ is connected in parallel with the ninth resistor R ₉; one end of the sixth capacitor C ₆ is electrically connected with the second diode T ₂₃ of the second transistor, and the other end of the sixth capacitor C ₆ is grounded; the seventh capacitance C ₇ is connected in parallel with the sixth capacitance C ₆.

Limiting the current flowing through the first transistor first pole T ₁₁ by a seventeenth resistor R ₁₇ to operate the first transistor T ₁ within a safe range; the fourth capacitor C ₄, the fifth capacitor C ₅, the sixth capacitor C ₆, and the seventh capacitor C ₇ are provided to stabilize the enable supply second port 132 and enable supply port voltage of the third port 133.

In other embodiments, as shown in fig. 10, the control signal transmission circuit 100 is further electrically connected to the micro control unit 200 and the first power supply 300.

The micro control unit 200 has: a micro-control first port 201, a micro-control second port 202, and a micro-control third port 203;

the first power supply 300 has: a power first port 301, a power second port 302;

the micro-control first port 201 is electrically connected to the passive output port 102, the micro-control second port 202 is electrically connected to the enable signal port 103, the micro-control third port 203 is electrically connected to the power first port 301, and the power second port 302 is electrically connected to the power input port 104.

Fig. 10 shows a connection manner of the control signal transmission circuit 100 and the micro control unit 200 (i.e., MCU), and the first power supply 300. Fig. 10 also shows that I/O transmission port 101 is electrically connected to hard wire 900. The first power supply 300 supplies a voltage of 12V to the enable power supply module 130 and supplies an operating voltage to the micro control unit 200. The first power source 300 may be a battery, directly outputting a battery voltage; the battery may be subjected to dc voltage conversion, and the output voltage may be in accordance with the operating voltage of the power supply enabling module 130 and the micro control unit 200. When the first power supply 300 outputs the working voltage to the enabling power supply module 130 and the micro control unit 200 in a DC voltage conversion manner, the first power supply 300 further includes a power management module, which may be a conventional DC voltage converter such as a DC-DC converter and an LDO, and the application is not limited thereto.

In other embodiments, as shown in fig. 11, a control signal transmission method is applied to the control signal transmission circuit described in the first aspect, and the method includes:

S100: responding to the I/O transmission port to receive a passive control signal transmitted by a single-channel signal transmission line, and transmitting a corresponding control signal to the micro control unit through a passive transmission second port;

s200: and responding to the micro control unit to send out a control enabling signal through the micro control second port, and sending out a corresponding active control signal to the single-path signal transmission line through the I/O transmission port.

The active control signal is transmitted to the corresponding equipment through a single signal transmission line.

The control signal transmission circuit described in the first aspect is not described herein.

It should be understood that, although the steps in the flowchart of fig. 1 are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in fig. 1 may include multiple sub-steps or stages that are not necessarily performed at the same time, but may be performed at different times, nor do the order in which the sub-steps or stages are performed necessarily performed in sequence, but may be performed alternately or alternately with at least a portion of other steps or sub-steps of other steps.

In other embodiments, a circuit board includes the control signal transmission circuit of the first aspect, and an I/O transmission port of the control signal transmission circuit is electrically connected to the single-channel signal transmission line.

Preferably, the circuit board is a printed circuit board;

the control signal transmission circuit is solidified on the circuit board;

The connector is assembled on the circuit board and is electrically connected with the single hard wire through the I/O transmission port of the I/O signal pin connection control signal transmission circuit. When the male/female heads of the connectors are correspondingly connected, the I/O signal pins and the hard wires form a bidirectional signal transmission link.

In other embodiments, an in-vehicle electronic device includes the circuit board of the third aspect, the circuit board including the control signal transmission circuit of the first aspect;

In other embodiments, a vehicle, the vehicle-mounted electronic device of the fourth aspect, a single-channel signal transmission line, and an external electronic device;

The control signal transmission circuit according to the first aspect and the circuit board according to the third aspect are not described in detail herein.

By implementing the control signal transmission circuit, the control signal transmission method, the circuit board and the vehicle, which are recorded in the embodiment of the application, the signal transmitted in two directions can be multiplexed with a single hard wire; hard wire resources are saved, and wiring space is saved; the cost of the components is reduced.

Any combination of the above optional solutions may be adopted to form an optional embodiment of the present application, which is not described herein.

Example 1

As shown in fig. 1, the control signal transmission circuit 100 includes: an I/O transmission port 101, a passive output port 102, an enable signal port 103, and a power supply port 104, wherein the I/O transmission port 101 is electrically connected to a single signal transmission line;

Example two

On the basis of the first embodiment, the passive transmission module 110, as shown in fig. 2, includes: a first diode D ₁, a first composite tube T ₁₀₀, a first resistor R ₁, a second resistor R ₂, a third resistor R ₃, and a fourth resistor R ₄;

The first composite tube T ₁₀₀ has: a first composite tube first pin T ₁₀₁, a first composite tube second pin T ₁₀₂, a first composite tube third pin T ₁₀₃, a first composite tube fourth pin T ₁₀₄, a first composite tube fifth pin T ₁₀₅, a first composite tube sixth pin T ₁₀₆; the cathode of the first diode D ₁ is used as a passive transmission first port 111, the cathode of the first diode D ₁ is connected in series with a first resistor R ₁ and then grounded, and the anode of the first diode D ₁ is electrically connected with one end of a second resistor R ₂ and then is electrically connected with a fifth pin T ₁₀₅ of the first composite tube; the other end of the second resistor R ₂ is electrically connected with one end of the third resistor R ₃ and then is electrically connected with a fourth pin T ₁₀₄ of the first composite tube; the other end of the third resistor R ₃ is electrically connected with a sixth pin T ₁₀₆ of the first composite tube, and the sixth pin T ₁₀₆ of the first composite tube is used as the passive transmission second port 112; the second pin T ₁₀₂ of the first composite tube is electrically connected with the third pin T ₁₀₃ of the first composite tube and then is electrically connected with one end of the fourth resistor R ₄, and the other end of the fourth resistor R ₄ is electrically connected with the first pin T ₁₀₁ of the first composite tube and then is grounded.

The active transmission module 120, as shown in fig. 3, includes: the second diode D ₂, the second composite tube T ₂₀₀, the fifth resistor R ₅, the sixth resistor R ₆, the seventh resistor R ₇ and the eighth resistor R ₈; the second composite tube T ₂₀₀ has: a second composite tube first pin T ₂₀₁, a second composite tube second pin T ₂₀₂, a second composite tube third pin T ₂₀₃, a second composite tube fourth pin T ₂₀₄, a second composite tube fifth pin T ₂₀₅, and a second composite tube sixth pin T ₂₀₆; the fifth pin T ₂₀₅ of the second composite tube is used as an active transmission first port 121, and the fifth pin T ₂₀₅ of the second composite tube is connected in series with a fifth resistor R ₅ and then grounded; the fifth pin T ₂₀₅ of the second composite pipe is electrically connected with the fourth pin T ₂₀₄ of the second composite pipe after being connected with the sixth resistor R ₆ in series; the sixth pin T ₂₀₆ of the second composite tube is used as an active transmission second port 122, the sixth pin T ₂₀₆ of the second composite tube is connected with the cathode of the second diode D ₂ after being connected with the seventh resistor R ₇ in series, and the anode of the second diode D ₂ is used as an active transmission third port 123; the second pin T ₂₀₂ of the second composite tube is connected in series with the third pin T ₂₀₃ of the second composite tube and then is electrically connected with one end of the eighth resistor R ₈, and the other end of the eighth resistor R ₈ is electrically connected with the first pin T ₂₀₁ of the second composite tube and then is grounded.

The power supply enabling module 130, as shown in fig. 4, includes: a first transistor T ₁, a second transistor T ₂, a ninth resistor R ₉, a tenth resistor R ₁₀. The first transistor T ₁ has: a first transistor first pole T ₁₁, a first transistor second pole T ₁₂, a first transistor third pole T ₁₃; the second transistor T ₂ has: a first pole T ₂₁ of the second transistor, a second pole T ₂₂ of the second transistor, and a third pole T ₂₃ of the second transistor. First transistor first pole T ₁₁ is grounded as enable supply first port 131, first transistor second pole T ₁₂; the third electrode T ₁₃ of the first transistor is electrically connected to the tenth resistor R ₁₀ in series and then electrically connected to the first electrode T ₂₁ of the second transistor, the first electrode T ₂₁ of the second transistor is electrically connected to one end of the ninth resistor R ₉, the other end of the ninth resistor R ₉ is electrically connected to the third electrode T ₂₃ of the second transistor and then serves as the third power supply enabling port 133, and the second electrode T ₂₂ of the second transistor serves as the second power supply enabling port 132.

The first composite tube T ₁₀₀, as shown in fig. 5, includes: a third transistor T ₃, a fourth transistor T ₄;

the third transistor first pole T ₃₁ is different from the fourth transistor first pole T ₄₁ in the majority carrier type.

A second composite tube T ₂₀₀, as shown in fig. 6, includes: a fifth transistor T ₅, a sixth transistor T ₆;

The fifth transistor first pole T ₅₁ is of a different majority carrier type than the sixth transistor first pole T ₆₁.

The contents of the first embodiment are not described herein.

Example III

On the basis of the second embodiment, the control signal transmission circuit 100 further includes: eleventh resistor R ₁₁, twelfth resistor R ₁₂, thirteenth resistor R ₁₃, fourteenth resistor R ₁₄, fifteenth resistor R ₁₅, sixteenth resistor R ₁₆, seventeenth resistor R ₁₇, first capacitor C ₁, second capacitor C ₂, third capacitor C ₃, fourth capacitor C ₄, fifth capacitor C ₅, sixth capacitor C ₆, seventh capacitor C ₇;

As shown in fig. 7, an eleventh resistor R ₁₁ is connected in series between the anode of the first diode D ₁ and the fifth pin T ₁₀₅ of the first composite tube, instead of electrically connecting the anode of the first diode D ₁ and the fifth pin T ₁₀₅ of the first composite tube,

The anode of the first diode D ₁ is connected with a first capacitor C ₁ in series and then grounded;

the sixth pin of the first composite tube is sequentially connected with a twelfth resistor R ₁₂ and a second capacitor C ₂ in series and then grounded,

The connection part of the twelfth resistor R ₁₂ and the second capacitor C ₂ replaces the sixth pin T ₁₀₆ of the first composite tube and is used as the passive transmission second port 112;

The second pin T ₁₀₂ of the first composite pipe is connected with the thirteenth resistor R ₁₃ in series and then is electrically connected with the third pin T ₁₀₃ of the first composite pipe so as to replace the electrical connection between the second pin T ₁₀₂ of the first composite pipe and the third pin T ₁₀₃ of the first composite pipe;

As shown in fig. 8, the fifth pin T ₂₀₅ of the second composite tube is serially connected in sequence with a fourteenth resistor R ₁₄ and a fifth resistor R ₅ and then grounded, so as to replace the fifth pin T ₂₀₅ of the second composite tube to serially connect with the fifth resistor R ₅ and then grounded;

The connection part of the fourteenth resistor R ₁₄ and the fifth resistor R ₅ replaces a fifth pin T ₂₀₅ of the second composite tube and is used as the active transmission first port 121;

One end of the fifteenth resistor R ₁₅ is electrically connected with the sixth pin T ₂₀₆ of the second composite tube, and the other end of the fifteenth resistor R ₁₅ replaces the sixth pin T ₂₀₆ of the second composite tube to serve as the active transmission second port 122;

one end of the third capacitor C ₃ is electrically connected with the sixth pin T ₂₀₆ of the second composite tube, and the other end of the third capacitor C ₃ is grounded;

The second pin T ₂₀₂ of the second composite pipe is connected with the sixteenth resistor R ₁₆ in series and then is electrically connected with the third pin T ₂₀₃ of the second composite pipe so as to replace the electrical connection between the second pin T ₂₀₂ of the second composite pipe and the third pin T ₂₀₃ of the second composite pipe;

As shown in fig. 9, one end of the seventeenth resistor R ₁₇ replaces the first transistor first pole T ₁₁, and is used as the power supply enabling first port 131, and the other end of the seventeenth resistor R ₁₇ is electrically connected to the first transistor first pole T ₁₁;

one end of the fourth capacitor C ₄ is electrically connected with the third electrode T ₂₃ of the second transistor, and the other end of the fourth capacitor C ₄ is grounded;

The fifth capacitor C ₅ is connected in parallel with the ninth resistor R ₉;

one end of the sixth capacitor C ₆ is electrically connected with the second diode T ₂₃ of the second transistor, and the other end of the sixth capacitor C ₆ is grounded;

The seventh capacitance C ₇ is connected in parallel with the sixth capacitance C ₆.

The contents of the second embodiment are not described herein.

Example IV

On the basis of any one of the first to third embodiments, the control signal transmission circuit 100, as shown in fig. 10, is further electrically connected to the micro control unit 200 and the first power supply 300;

The micro-control first port 201 is electrically connected to the passive output port 102, the micro-control second port 202 is electrically connected to the enable signal port 103, the micro-control third port 203 is electrically connected to the power first port 301, and the power second port 302 is electrically connected to the power supply port 104.

The contents described in the first embodiment, the second embodiment, and the third embodiment are not described in detail herein.

Example five

The application of the control signal transmission circuit to the micro-control unit active/passive wake-up service will be described below.

In this application, the active/passive commutation control signal is transmitted over a single hard wire. When the I/O transmission port receives the high-level passive wake-up signal, the passive transmission second port outputs the high level, and the high level is transmitted to the micro-control unit through the micro-control first port, so that the passive wake-up of the micro-control unit is completed.

When the micro control unit needs to actively wake up the external device, the micro control unit sends an enabling signal through the micro control second port, and the I/O transmission port outputs a high level to the corresponding external device so as to wake up the corresponding external device. The active/passive wake-up signals are all transmitted over a single hard wire. The working principle of the circuit is described in the foregoing, and is not described herein again.

Example six

The application of the control signal transmission circuit to IVI mute service will be described below.

Under this application, the IVI is playing music, and when the T-BOX receives an emergency call task, an active mute control signal is sent to the IVI through the control signal transmission circuit.

Also during the process of playing music, when the T-BOX receives a promotion telephone, the IVI sends a sound control signal to the T-BOX through the control signal transmission circuit to mute the T-BOX because the promotion telephone has a lower priority than the music playing. The active/passive mute signals are all transmitted over a single hard wire. The working principle of the circuit is described in the foregoing, and is not described herein again.

Example seven

The following will describe the application of wake-up control signal interaction between the control chip and the bluetooth chip via the control signal transmission circuit.

The control chip sends an active wake-up control signal to the Bluetooth chip to control the Bluetooth chip to play songs in the Bluetooth device;

When the Bluetooth chip receives the high-priority signal, the Bluetooth chip sends a passive wake-up control signal to the control chip to wake up the control chip so as to execute the task corresponding to the high-priority signal.

In this application, the active/passive wake-up control signal between the control chip and the bluetooth chip is transmitted through electronic circuitry that is cured on the PCB.

Example eight

The control signal transmission method applied to the control signal transmission circuit described in any one of the first to fourth embodiments includes, as shown in fig. 11:

The contents of the first to fourth embodiments are not described here.

Example nine

A circuit board comprises the control signal transmission circuit according to any one of the first to fourth embodiments, wherein an I/O transmission port of the control signal transmission circuit is electrically connected with a single signal transmission line.

The descriptions of the first to fourth embodiments are not repeated here.

Examples ten

On the basis of the ninth embodiment, the circuit board is a printed circuit board;

the control signal transmission circuit is solidified on the circuit board;

The connector is assembled on the circuit board and is electrically connected with the single hard wire through the I/O transmission port of the I/O signal pin connection control signal transmission circuit. The contents of the sixth embodiment are not described herein.

Example eleven

The vehicle-mounted electronic device includes the circuit board according to any one of the ninth to tenth embodiments, and the circuit board includes the control signal transmission circuit according to any one of the first to fourth embodiments.

Example twelve

A vehicle comprising the in-vehicle electronic device according to the eleventh embodiment,

A single-channel signal transmission line externally connected with electronic equipment;

The vehicle-mounted electronic equipment is provided with an I/O transmission port, and the I/O transmission port is electrically connected with the external electronic equipment through a single-channel signal transmission line; the vehicle-mounted electronic equipment at least comprises a T-BOX; the single-channel signal transmission line at least comprises a hard wire and a copper wire arranged on the circuit board; the external electronic equipment at least comprises one of the following: airbag, audio amplifier, IVI, bluetooth chip. The contents described in the eleventh embodiment are not described in detail herein.

In particular, according to embodiments of the present application, the processes described above with reference to flowcharts may be implemented as computer software programs. For example, embodiments of the present application include a computer program product comprising a computer program loaded on a computer readable medium, the computer program comprising program code for performing the method shown in the flowcharts. In such an embodiment, the computer program may be downloaded and installed from a network via a communication device, or from memory, or from ROM. The above-described functions defined in the method of the embodiment of the present application are performed when the computer program is executed by an external processor.

It should be noted that, the computer readable medium of the embodiments of the present application may be a computer readable signal medium or a computer readable storage medium, or any combination of the two. The computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or a combination of any of the foregoing. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In embodiments of the present application, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. In contrast, in embodiments of the present application, the computer-readable signal medium may comprise a data signal propagated in baseband or as part of a carrier wave, with the computer-readable program code embodied therein. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device. Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: electrical wires, fiber optic cables, RF (Radio Frequency), and the like, or any suitable combination thereof.

The computer readable medium may be contained in the server; or may exist alone without being assembled into the server. The computer readable medium carries one or more programs which, when executed by the server, cause the server to: acquiring a frame rate of an application on the terminal in response to detecting that a peripheral mode of the terminal is not activated; when the frame rate meets the screen-extinguishing condition, judging whether a user is acquiring screen information of the terminal; and controlling the screen to enter an immediate dimming mode in response to the judgment result that the user does not acquire the screen information of the terminal.

Computer program code for carrying out operations for embodiments of the present application may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computer (for example, through the Internet using an Internet service provider).

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments. In particular, for a system or system embodiment, since it is substantially similar to a method embodiment, the description is relatively simple, with reference to the description of the method embodiment being made in part. The systems and system embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.

The foregoing has outlined rather broadly the more detailed description of the application in order that the detailed description of the application that follows may be better understood, and in order that the present principles and embodiments may be better understood; also, it is within the scope of the present application to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the application.

The foregoing description of the preferred embodiments of the application is not intended to limit the application to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the application are intended to be included within the scope of the application.

Claims

1. A control signal transmission circuit, characterized in that the control signal transmission circuit has: the device comprises an I/O transmission port, a passive output port, an enabling signal port and a power supply port, wherein the I/O transmission port is used for being electrically connected with a single-path signal transmission line;

the enabling power supply module has: enabling the power supply first port, enabling the power supply second port, and enabling the power supply third port;

The passive transmission first port is electrically connected with the active transmission second port to serve as the I/O transmission port, the passive transmission second port is used as the passive output port, the active transmission first port is electrically connected with the enabling power supply first port to serve as the enabling signal port, the active transmission third port is electrically connected with the enabling power supply second port, and the enabling power supply third port is used as the power supply port.

2. The control signal transmission circuit of claim 1, wherein the passive transmission module comprises: the first diode, the first composite tube, the first resistor, the second resistor, the third resistor and the fourth resistor;

The cathode of the first diode is used as the passive transmission first port, the cathode of the first diode is connected in series with the first resistor and then grounded, and the anode of the first diode is electrically connected with one end of the second resistor and then is electrically connected with the fifth pin of the first composite tube;

the other end of the third resistor is electrically connected with a sixth pin of the first composite tube, and the sixth pin of the first composite tube is used as the passive transmission second port;

3. The control signal transmission circuit of claim 2, wherein the first composite tube comprises: a third transistor and a fourth transistor;

The third transistor first pole is used as the first composite tube fifth pin, the third transistor second pole is used as the first composite tube fourth pin, the third transistor third pole is used as the first composite tube third pin, the fourth transistor first pole is used as the first composite tube second pin, the fourth transistor second pole is used as the first composite tube first pin, and the fourth transistor third pole is used as the first composite tube sixth pin;

4. The control signal transmission circuit of claim 1, wherein the active transmission module comprises: the second diode, the second composite tube, the fifth resistor, the sixth resistor, the seventh resistor and the eighth resistor;

The fifth pin of the second composite tube is used as the first active transmission port, is connected in series with the fifth resistor and then is grounded;

the fifth pin of the second composite pipe is electrically connected with the fourth pin of the second composite pipe after being connected with the sixth resistor in series;

the sixth pin of the second composite tube is used as the active transmission second port, and is electrically connected with the cathode of the second diode after being connected with the seventh resistor in series, and the anode of the second diode is used as the active transmission third port;

the second pin of the second composite tube is connected in series with the third pin of the second composite tube and then is electrically connected with one end of the eighth resistor, and the other end of the eighth resistor is electrically connected with the first pin of the second composite tube and then is grounded.

5. The control signal transmission circuit of claim 4, wherein the second composite tube comprises: a fifth transistor, a sixth transistor;

The first electrode of the fifth transistor is used as a fifth pin of the second composite tube, the second electrode of the fifth transistor is used as a fourth pin of the second composite tube, the third electrode of the fifth transistor is used as a third pin of the second composite tube, the first electrode of the sixth transistor is used as a second pin of the second composite tube, the second electrode of the sixth transistor is used as a first pin of the second composite tube, and the third electrode of the sixth transistor is used as a sixth pin of the second composite tube;

6. The control signal transmission circuit of claim 1, wherein the enable power module comprises: a first transistor, a second transistor, a ninth resistor, and a tenth resistor;

The first electrode of the first transistor is used as the enabling power supply first port, and the second electrode of the first transistor is grounded; the third electrode of the first transistor is electrically connected with the first electrode of the second transistor after being connected with the tenth resistor in series, the first electrode of the second transistor is electrically connected with one end of the ninth resistor, the other end of the ninth resistor is electrically connected with the third electrode of the second transistor and then used as the enabling power supply third port, and the second electrode of the second transistor is used as the enabling power supply second port.

7. The control signal transmission circuit according to any one of claims 2 to 6, characterized in that the control signal transmission circuit further comprises: eleventh resistor, twelfth resistor, thirteenth resistor, fourteenth resistor, fifteenth resistor, sixteenth resistor, seventeenth resistor, first capacitor, second capacitor, third capacitor, fourth capacitor, fifth capacitor, sixth capacitor, seventh capacitor;

The anode of the first diode is connected in series with the first capacitor and then grounded;

the sixth pin of the first composite tube is sequentially connected with the twelfth resistor and the second capacitor in series and then grounded,

The connection part of the twelfth resistor and the second capacitor replaces the sixth pin of the first composite tube and is used as the passive transmission second port;

The second pin of the first composite tube is connected with the thirteenth resistor in series and then is electrically connected with the third pin of the first composite tube so as to replace the electrical connection between the second pin of the first composite tube and the third pin of the first composite tube;

The fifth pin of the second composite tube is serially connected with the fourteenth resistor and the fifth resistor in sequence and then grounded so as to replace the fifth pin of the second composite tube to be serially connected with the fifth resistor and then grounded;

The connection part of the fourteenth resistor and the fifth resistor replaces a fifth pin of the second composite tube and is used as the active transmission first port;

One end of the fifteenth resistor is electrically connected with a sixth pin of the second composite tube, and the other end of the fifteenth resistor replaces the sixth pin of the second composite tube to serve as the active transmission second port;

the second pin of the second composite tube is connected with the third pin of the second composite tube after being connected with the sixteenth resistor in series so as to replace the electrical connection between the second pin of the second composite tube and the third pin of the second composite tube;

One end of the seventeenth resistor is used as the enabling power supply first port instead of the first pole of the first transistor, and the other end of the seventeenth resistor is electrically connected with the first pole of the first transistor;

The fifth capacitor is connected with the ninth resistor in parallel;

the seventh capacitor is connected in parallel with the sixth capacitor.

8. The control signal transmission circuit according to claim 1, wherein the control signal transmission circuit is further electrically connected to the micro control unit and the first power supply;

Wherein the micro control unit has: micro-controlling the first port, the second port and the third port;

9. A vehicle-mounted electronic device, characterized in that it comprises a circuit board including the control signal transmission circuit according to any one of claims 1 to 8;

10. A vehicle comprising the vehicle-mounted electronic device of claim 9, a single-channel signal transmission line, and an external electronic device;

The vehicle-mounted electronic equipment is provided with an I/O transmission port, and the I/O transmission port is electrically connected with the external electronic equipment through the single-channel signal transmission line; the vehicle-mounted electronic equipment at least comprises a T-BOX; the single-channel signal transmission line at least comprises a hard wire and a copper wire arranged on the circuit board; the external electronic equipment at least comprises one of the following: airbag, audio amplifier, IVI, bluetooth chip.