Functional circuit and memory chip

Abstract

The invention belongs to the technical field of household appliances, and particularly relates to a functional circuit and a storage chip. According to the functional circuit, a communication circuit between an electronic element and equipment is expanded, transmission of transmission signals is controlled through the control unit, input and output voltages of a chip can be limited through the limiting unit, and high-frequency signals are filtered through the filtering unit, so that the problem that the circuits are prone to being mixed in communication is solved, and the service life of the circuit is prolonged. And the line current of the communication circuit is also expanded, so that the misoperation of the equipment is avoided, and the user experience is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of household appliances, and specifically relates to a functional circuit and a storage chip. Background Art

[0002] As people's living standards improve, the functions of traditional household appliances cannot meet the various usage needs of users. Therefore, multifunctional integrated devices are constantly updated, and the user's command information is transmitted to the corresponding device through the communication connection between devices, so as to meet the user's needs and realize different execution functions.

[0003] In the prior art, in order to achieve mutual communication between two devices, a transmission medium or physical medium is necessary for connection. Commonly used transmission media include twisted pair, coaxial optical cable, and optical fiber. For the connection between two devices, a communication cable is usually used to connect the computer boards of the devices to achieve the purpose of communication between the devices.

[0004] However, connecting multiple devices with only communication cables is easily interfered by external signals; and when two devices are not working synchronously, cross-current is easily generated, causing the non-working device of the two devices to receive interference signals and cause malfunction problems. Summary of the invention

[0005] The present application provides a functional circuit and a storage chip for solving the problems of interference signals and cross-current in peripheral circuits when two computer boards of two devices are connected for communication.

[0006] In a first aspect, a functional circuit is provided, the functional circuit comprising:

[0007] A first receiving unit, a first sending unit, a second receiving unit, a second sending unit, a first transmission unit, and a second transmission unit.

[0008] The first receiving unit is connected to the first sending unit through the first transmission unit and the second transmission unit.

[0009] The second receiving unit is connected to the second sending unit through the first transmission unit and the second transmission unit.

[0010] The first sending unit is used to send a communication signal of the second device, so that the first receiving unit receives the communication signal of the second device.

[0011] The second sending unit is used to send a communication signal of the first device, so that the second receiving unit receives the communication signal of the first device.

[0012] Optionally, the functional circuit further includes: a first limiting unit, a second limiting unit, a third limiting unit and a fourth limiting unit.

[0013] The first limiting unit is disposed in the first receiving unit, and is used to limit an input voltage of the first receiving unit.

[0014] The second limiting unit is disposed in the first sending unit, and is used for limiting an output voltage of the first sending unit.

[0015] The third limiting unit is disposed in the second receiving unit, and is used for limiting an input voltage of the second receiving unit.

[0016] The fourth limiting unit is disposed in the second sending unit, and the fourth limiting unit is used to limit an output voltage of the second sending unit.

[0017] Optionally, the functional circuit further includes: a first filtering unit, a second filtering unit, a third filtering unit and a fourth filtering unit.

[0018] The first filtering unit is connected to the first receiving unit, and the first filtering unit is used to filter the high-frequency signal received by the first receiving unit.

[0019] The second filtering unit is connected to the second sending unit, and the second filtering unit is used to filter the high-frequency signal sent by the second sending unit.

[0020] The third filtering unit is connected to the first transmitting unit, and the third filtering unit is used to filter the interference signal received by the first transmitting unit.

[0021] The fourth filtering unit is connected to the second transmitting unit, and the fourth filtering unit is used to filter the interference signal received by the second transmitting unit.

[0022] Optionally, the functional circuit further includes: a first control unit, a second control unit, a third control unit and a fourth control unit.

[0023] The first control unit is arranged in the first receiving unit, and is used for controlling the level received by the first receiving unit.

[0024] The second control unit is arranged in the first sending unit, and is used for controlling the level sent by the first sending unit.

[0025] The third control unit is arranged in the second receiving unit, and is used for controlling the level received by the second receiving unit.

[0026] The fourth control unit is arranged in the second sending unit, and the fourth control unit is used to control the level sent by the second sending unit.

[0027] Optionally, the functional circuit also includes: a detection unit.

[0028] One end of the detection unit is connected to the first receiving unit, and the other end of the detection unit is connected to the second sending unit. When the first transmission unit is working and the second transmission unit is not working, the detection unit is used to transmit the communication signal sent by the second sending unit to the first receiving unit.

[0029] Optionally, the functional circuit further includes: an anti-interference circuit, the anti-interference circuit includes: a fifth control unit and a sixth control unit, the fifth control unit and the sixth control unit are connected in series.

[0030] The first input end of the anti-interference circuit is connected to the first limiting unit in the first receiving unit, the second input end of the anti-interference circuit is connected to the third filtering unit, and the output end of the anti-interference circuit is connected to the first control unit in the first receiving unit. The anti-interference circuit is used to prevent the communication signal of the first device from being transmitted to the second device through the fifth control unit and the sixth control unit when the first transmission unit is working and the second transmission unit is not working.

[0031] Optionally, the functional circuit further includes: a protection unit, and the protection unit includes: a seventh control unit, an eighth control unit, a MOS tube, a first voltage regulator tube and a second voltage regulator tube.

[0032] The source of the MOS tube is connected to the third filtering unit, the gate of the MOS tube is connected to the first input end of the seventh control unit, and the drain of the MOS tube is connected to the input end of the first voltage regulator tube.

[0033] The output end of the first Zener diode is connected to the output end of the second Zener diode, the input end of the second Zener diode is connected to the power supply end of the first transmission unit, the second input end of the seventh control unit is connected to the first input end of the eighth control unit, and the second input end of the eighth control unit is connected to the power supply end of the first transmission unit; the output ends of the seventh control unit and the eighth control unit are grounded.

[0034] Optionally, the first transmission unit is an electronic component of the first device, and the second transmission unit is an electronic component of the second device.

[0035] When the first device is running, the first transmission unit is in a working state.

[0036] When the second device is running, the second transmission unit is in a working state.

[0037] In a second aspect, the present application provides a dual-function household appliance, which includes: a first device and a second device, wherein the first device and the second device share a functional circuit as described in the first aspect and various possible implementation methods of the first aspect to implement the functions of the first device and the second device.

[0038] In a third aspect, the present application provides a memory chip, in which the functional circuits as described in the first aspect and various possible implementations of the first aspect are stored.

[0039] The functional circuit provided in the present application expands the communication circuit between the electronic components and the device, controls the transmission of the transmission signal through the control unit, limits the input and output voltages of the chip through the limiting unit, and uses the filtering unit to filter out high-frequency signals, thereby preventing the above-mentioned circuit from being easily cross-connected during communication, and also expands the line current of the communication circuit, avoiding malfunction of the device and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0041] Figure 1 This is a schematic diagram of a functional circuit provided by this application. Figure 1 ;

[0042] Figure 2 This is a schematic diagram of a functional circuit provided by this application. Figure 2 ;

[0043] Figure 3 This is a schematic diagram of a functional circuit provided by this application. Figure 3 ;

[0044] Figure 4 It is a structural schematic diagram of an anti-interference circuit provided by the present application;

[0045] Figure 5 It is a structural schematic diagram of a protection unit provided in this application.

[0046] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in sequences other than those illustrated or described herein, for example.

[0049] In the embodiments of the present application, the words "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0050] As people's living standards improve, the functions of traditional household appliances cannot meet the various usage needs of users. Therefore, multifunctional integrated devices are constantly updated, and the user's command information is transmitted to the corresponding device through the communication connection between devices, so as to meet the user's needs and realize different execution functions.

[0051] In the prior art, in order to achieve mutual communication between two devices, a transmission medium or physical medium is necessarily required for connection. Commonly used transmission media include twisted pair, coaxial optical cable, and optical fiber. For the connection between two devices, a communication cable is usually used to connect the computer boards of the devices to achieve the purpose of communication between the devices.

[0052] However, connecting multiple devices with only communication cables is easily interfered by external signals; and when two devices are not working synchronously, cross-current is easily generated, causing the non-working device of the two devices to receive interference signals and cause malfunction problems.

[0053] In view of the above problems, the present application provides a functional circuit. The functional circuit expands the line current of the communication circuit by expanding the communication circuit between the electronic component and the device, thereby avoiding the defect of malfunction of the device, solving the problem of easy cross-current before the peripheral circuit is expanded, and improving the user experience.

[0054] The functional circuit shown in the present application is described below through specific embodiments. It should be noted that the following embodiments can exist independently or in combination with each other, and the same or similar contents will not be described repeatedly in different embodiments.

[0055] The communication between two devices is often achieved through a transmission medium or a physical medium, and the functional circuit provided in this application can be used for communication between two devices, for example, it can be applied to a dual-function household appliance such as a stacked washing machine and a dryer.

[0056] Figure 1 A schematic diagram of the structure of the functional circuit provided in the embodiment of the present application Figure 1 .like Figure 1 As shown, the functional circuit provided by this embodiment includes: a first receiving unit 101, a first sending unit 102, a second receiving unit 202, a second sending unit 201, a first transmission unit 301 and a second transmission unit 302.

[0057] The first receiving unit 101, the second sending unit 201 and the first transmission unit 301 are applied to the first device. The transmission signal from the first device is sent to the second device or the transmission signal from the second device is received through the first transmission unit 301. The first transmission unit can be, for example, a wiring terminal. The first receiving unit 101 is connected to the receiving end RXD1 of the first device, and the second sending unit 201 is connected to the transmitting end TXD1 of the first device.

[0058] The second receiving unit 202, the first sending unit 102 and the second transmission unit 302 are applied to the second device. The second transmission unit 302 sends a transmission signal from the second device to the first device or receives a transmission signal from the first device. The second transmission unit can be, for example, a wiring terminal. The second receiving unit 202 is connected to the receiving end RXD2 of the second device, and the first sending unit 102 is connected to the transmitting end TXD2 of the second device.

[0059] It is understandable that the first transmission unit 301 and the second transmission unit 302 are respectively provided with multiple transmission interfaces, and different interfaces can implement different functions. The number of interfaces provided by the two can be the same or different. This application does not impose any special restrictions on the number of interfaces of the transmission unit.

[0060] When the first device sends a transmission signal, the input end of the second sending unit 201 receives the transmission signal from the first device, and inputs it to the first transmission unit 301 through the output end of the second sending unit 201; since the first transmission unit 301 and the second transmission unit 302 are connected through a transmission medium, the first transmission unit 301 can send the transmission signal to the second transmission unit 302; the second transmission unit 302 inputs the transmission signal to the input end of the second receiving unit 202, and the second receiving unit 202 transmits the transmission signal to the receiving end of the second device through the output end, thereby forming a complete communication circuit for the transmission signal. At this time, the signal sent by the first device is transmitted to the second device through the above-mentioned communication circuit.

[0061] When the second device sends a transmission signal, the input end of the first sending unit 102 receives the transmission signal from the second device, and inputs it to the second transmission unit 302 through the output end of the first sending unit 102; since the second transmission unit 302 and the first transmission unit 301 are connected through a transmission medium, the second transmission unit 302 can send the transmission signal to the first transmission unit 301; the first transmission unit 301 inputs the transmission signal to the input end of the first receiving unit 101, and the first receiving unit 101 transmits the transmission signal to the receiving end of the first device through the output end, thereby forming a complete communication circuit for the transmission signal. At this time, the signal sent by the second device is transmitted to the first device through the above-mentioned communication circuit.

[0062] The functional circuit provided in this embodiment prevents the problem of cross-current during communication of the above-mentioned circuit by setting a receiving unit and a sending unit between the first transmission unit and the second transmission unit and the first device and the second device, and also expands the line current of the communication circuit, avoids malfunction of the device, and improves the user experience.

[0063] Optionally, the functional circuit further includes: a first limiting unit 401 , a second limiting unit 402 , a third limiting unit 403 and a fourth limiting unit 404 .

[0064] Figure 2 A schematic diagram of the structure of the functional circuit provided in the embodiment of the present application Figure 2 .like Figure 2 As shown, the first limiting unit 401 is disposed in the first receiving unit 101 and is close to the input end of the first receiving unit 101, and the first limiting unit 401 is connected to the first transmitting unit 301. The first limiting unit 401 is used to limit the input voltage of the first receiving unit 101, and the voltage comes from the transmission voltage of the first transmitting unit 301. For example, the first limiting unit 401 can be a clamping diode, and since the operating voltage in the chip for transmitting and receiving transmission signals is 5V, the clamping diode can limit the input voltage of the first receiving unit 101 to 5±0.7V or 0±0.7V.

[0065] The second limiting unit 402 is disposed in the first transmitting unit 102, close to the output end of the first transmitting unit 102, and is connected to the second transmission unit 302. The second limiting unit 402 is used to limit the output voltage of the first transmitting unit 102, and the voltage comes from the transmission voltage of the second transmission unit 301. For example, the second limiting unit 402 may be a clamping diode, and the second transmission unit 302 may be a terminal. Since the operating voltage in the chip for transmitting and receiving transmission signals is 5V, the clamping diode may limit the output voltage of the first transmitting unit 102 to 5±0.7V or 0±0.7V.

[0066] It can be understood that the third limiting unit 403 is arranged in the second receiving unit 202, close to the input end of the second receiving unit 202, and connected to the second transmission unit 302; the third limiting unit 403 is used to limit the input voltage of the second receiving unit 202, and has the same function as the first limiting unit 401. The fourth limiting unit 404 is arranged in the second sending unit 201, close to the output end of the second sending unit 201, and connected to the first transmission unit 301; the fourth limiting unit 404 is used to limit the output voltage of the second sending unit 201, and has the same function as the second limiting unit 402.

[0067] Optionally, the functional circuit further includes: a first filtering unit 501 , a second filtering unit 502 , a third filtering unit 503 and a fourth filtering unit 504 .

[0068] Continue to see Figure 2 As shown, the first filtering unit 501 is connected to the first receiving unit 101 and also to the first transmission unit 301, and the access point of the first filtering unit 501 is the same as the access point of the first limiting unit 401, and the first filtering unit 501 is used to filter the high-frequency signal received by the first receiving unit 101. For example, the first filtering unit may be a filtering capacitor, and when the transmission signal is input to the first receiving unit 101 through the interface of the first transmission unit 301, it is easily interfered by the external circuit, and at this time, the filtering capacitor can filter out the high-frequency signal to ensure the accuracy of the signal received by the first receiving unit 101.

[0069] The second filtering unit 502 is connected to the second sending unit 201 and also connected to the first transmission unit 301, and the access point of the second filtering unit 502 is the same as the access point of the fourth limiting unit 404, and the second filtering unit 502 is used to filter the high-frequency signal sent by the second sending unit 201. For example, the second filtering unit 502 can be a filtering capacitor, and when the transmission signal is sent to the first transmission unit 301 through the second sending unit 201, the interference signal received by the signal during the transmission process can be filtered out.

[0070] The third filtering unit 503 is connected to the first transmission unit 301, and the connection interface does not include the connection interface between the first transmission unit 301 and the first receiving unit 101 and the second sending unit 201. When the second device supplies power to the functional circuit, it can be connected to the first transmission unit 301 through the second transmission unit 302, so as to supply power to the third filtering unit 503 and make it work normally. The third filtering unit 503 is used to filter the interference signal received by the first transmission unit 301 without the transmission signal interface. For example, the third filtering unit 503 is a filter capacitor, which has the functions of charging and discharging and filtering high-frequency signals. When the second device supplies power to the first receiving unit 101 and the second sending unit 201 of the first device through the first transmission unit 301, the filter capacitor acts as a power source for the first receiving unit 101 and the second sending unit 201 of the first device, and can filter out interference signals from the second device and interference signals caused by other interfaces.

[0071] The fourth filtering unit 504 is connected to the second transmission unit 301, and the connection interface does not include the connection interface between the second transmission unit 302 and the first sending unit 102 and the second receiving unit 202. When the second transmission unit 302 is powered, the fourth filtering unit 504 is powered through the internal loop, and the interference signal in the second transmission unit 302 is filtered out. The fourth filtering unit 504 is used to filter the interference signal received by the second transmission unit 302 without the transmission signal interface. For example, the fourth filtering unit 504 can be a filter capacitor, and the capacitor has the functions of charging and discharging and filtering high-frequency signals.

[0072] Optionally, the functional circuit further includes: a first control unit 601 , a second control unit 602 , a third control unit 603 and a fourth control unit 604 .

[0073] Continue to see Figure 2 As shown, the first control unit 601 is arranged in the first receiving unit 101 and is close to the output end of the first receiving unit 101. The first control unit 601 is used to control the level received by the first receiving unit 101. The input end of the first control unit 601 is first connected to the first filtering unit 501, then connected to the first limiting unit 401, and finally connected to the interface of the first transmission unit 301 outputting the transmission signal; the output end of the first control unit 601 is connected to the receiving end of the first device.

[0074] For example, the first control unit 601 may be a PNP transistor, the collector of which is connected to the receiving terminal RXD1 of the first device, and the emitter of which is connected to V CC _OUT power supply, and the base are connected to the output end of the first transmission unit 301, and the access point is the same as the access point of the first filtering unit 501 and the first limiting unit 401.

[0075] The second control unit 602 is arranged in the first sending unit 102 and is close to the output end of the first sending unit 102. The second control unit 602 is used to control the level sent by the first sending unit 102. The output end of the second control unit 602 is connected to the interface of the second transmission unit 302 input transmission signal, and the second limiting unit 402 is connected between the two; the input end of the second control unit 602 is connected to the sending end of the second device. For example, the second control unit 602 can be an NPN transistor, the base of which is connected to the sending end TXD2 of the second device, the emitter is grounded, and the collector of the transistor is connected in series with a resistor and then connected to V CC The collector of the transistor is connected to the input end of the second transmission unit 302 , and the access point is the same as the access point of the second limiting unit 402 .

[0076] The third control unit 603 is arranged in the second receiving unit 202 and is close to the input end of the second receiving unit 202. The third control unit 603 is used to control the level received by the second receiving unit 202. The input end of the third control unit 603 is connected to the interface of the second transmission unit 302 outputting the transmission signal, and the third limiting unit 403 is connected between the two; the output end of the third control unit 603 is connected to the receiving end of the second device. For example, the third control unit 603 can be a PNP transistor, the collector of which is connected to the receiving end RXD2 of the second device, and the emitter of the transistor is connected to V EE The power supply, the base is connected to the output end of the second transmission unit 302 , and the access point is the same as the access point of the third limiting unit 403 .

[0077] The fourth control unit 604 is arranged in the second sending unit 201 and is close to the output end of the second sending unit 201. The fourth control unit 604 is used to control the level sent by the second sending unit 201. The output end of the fourth control unit 604 is first connected to the second filtering unit 502, then connected to the fourth limiting unit 404, and finally connected to the interface of the first transmission unit 301 for inputting the transmission signal; the input end of the fourth control unit 604 is connected to the transmitting end of the first device. For example, the fourth control unit 604 can be an NPN transistor, the base of which is connected to the transmitting end TXD1 of the first device, the emitter is grounded, the collector of the transistor is connected in series with a resistor, and then connected to the input end of the first transmission unit 301, and the access point is the same as the access point of the second filtering unit 502 and the fourth limiting unit 404.

[0078] It can be understood that the signal transmission between two devices can be realized through the above four control units. For example, when the transmitting end TXD1 of the first device sends a high level, the fourth control unit 604 is turned on, so that the third control unit 603 is turned on, and at this time, the receiving end RXD2 of the second device receives a high level. When the transmitting end TXD2 of the second device sends a high level, the second control unit 602 is turned on, so that the first control unit 601 is turned on, and at this time, the receiving end RXD1 of the first device receives a high level.

[0079] The above functional circuit not only realizes the expansion of the line current of the communication circuit and avoids the defect of malfunction of the equipment, but also solves the problem of cross-current before the peripheral circuit is expanded, thereby improving the user experience.

[0080] Optionally, the functional circuit further includes: a detection unit 701.

[0081] Figure 3 A schematic diagram of the structure of the functional circuit provided in the embodiment of the present application Figure 3 .like Figure 3 As shown, one end of the detection unit 701 is connected to the first receiving unit 101, and the access point is the same as the access point of the first filtering unit 501 and the first limiting unit 401; the other end of the detection unit 701 is connected to the second sending unit 201, and the access point is the same as the access point of the second filtering unit 502 and the fourth limiting unit 404.

[0082] The detection unit 701 may be, for example, a variable resistor. The detection unit 701 is connected between the first control unit 601 and the fourth control unit 604 to form a path, thereby realizing the self-transmission and self-reception of the transmission signal of the first device.

[0083] When the first transmission unit 301 is working and the second transmission unit 302 is not working, the detection unit 701 is used to transmit the signal output by the transmitting end of the first device to the first control unit 601 through the fourth control unit 604, and finally the receiving end of the first device receives the signal, so that the first device has the function of self-transmission and self-reception, and can also detect whether the communication of the first device is normal.

[0084] Optionally, the functional circuit further includes: an anti-interference circuit, and the anti-interference circuit includes: a fifth control unit 605 and a sixth control unit 606, and the fifth control unit 605 and the sixth control unit 606 are connected in series.

[0085] Figure 4 This is a schematic diagram of the structure of the anti-interference circuit provided in the embodiment of the present application. Figure 4 As shown, the first input terminal V CCThe second input terminal U of the anti-interference circuit is connected to the first limiting unit 401 in the first receiving unit 101. R _OUT is connected to the third filter unit 503, and the output terminal V CC _OUT is connected to the first control unit 601 in the first receiving unit 101. The anti-interference circuit is mainly used to prevent the communication signal of the first device from being transmitted to the second device through the fifth control unit 605 and the sixth control unit 606 when the first transmission unit 301 is working and the second transmission unit 302 is not working. The fifth control unit 605 can be, for example, an NPN transistor, and the sixth control unit 606 can be, for example, a PNP transistor.

[0086] For example, when the first transmission unit 301 is working and the second transmission unit 302 is not working, that is, when only the first transmission unit 301 is powered, the above-mentioned anti-interference circuit works. R _OUT provides 12V power supply for the current circuit. At this time, the NPN transistor is turned on and pulls the base of the PNP transistor to a low level, and this low level is higher than V CC The voltage value at is lower, at this time, the PNP transistor is turned on, and its emitter outputs V CC _OUT. It is understandable that V CC Equal to V CC _OUT.

[0087] Optionally, the functional circuit further includes: a protection unit, which includes: a seventh control unit 607 , an eighth control unit 608 , a MOS tube, a first voltage regulator tube 801 and a second voltage regulator tube 802 .

[0088] Figure 5 This is a schematic diagram of the structure of the protection unit provided in the embodiment of the present application. Figure 5 As shown, the first input terminal of the protection unit is U R _OUT, the second input terminal is U R _IN, output terminal is U R The specific structure is: the source of the MOS tube is connected to the third filter unit 503 and also to the first input terminal U R The gate of the MOS tube is connected to the first input terminal of the seventh control unit 607, and the drain of the MOS tube is connected to the input terminal of the first voltage regulator tube 801. R _OUT is the operating voltage of the first device when the second device supplies power to the first device.

[0089] The output end of the first voltage regulator tube 801 is connected to the output end of the second voltage regulator tube 802, and is also connected to the output end U RThe input end of the second voltage regulator tube 802 is connected to the power supply end of the first transmission unit 301, that is, the second input end of the protection unit is U R _IN; the second input end of the seventh control unit 607 is connected to the first input end of the eighth control unit 608, and the second input end of the eighth control unit 608 is connected to the power supply end of the first transmission unit 301; the output ends of the seventh control unit 607 and the eighth control unit 608 are grounded. The seventh control unit can be, for example, an NPN transistor, and the eighth control unit can be, for example, an NPN transistor. The first voltage regulator 801 and the second voltage regulator 802 are used to stabilize the output voltage of the protection unit.

[0090] It can be understood that when the first device is running, the first device supplies power to the first transmission unit 101, and the first transmission unit 101 is in working state; when the second device is running, the second device supplies power to the second transmission unit 102, and the second transmission unit 202 is in working state.

[0091] For example, the MOS transistor may be a PMOS transistor.

[0092] When the second device supplies power to the first device, and the power source U R _OUT is 12V, U R _OUT, the eighth control unit 608 is turned on, that is, the voltage between the base and the emitter of the transistor is greater than 0.7V, and the NPN transistor is turned on; at this time, the voltage value between the source and the gate of the PMOS tube reaches the conduction threshold of the PMOS tube, and the PMOS tube is turned on; U R _OUT and U R If a path is formed between R Output U R _OUT is 12V.

[0093] When the first device is self-powered and U R _IN is 12V, U R When _OUT is 0V, the seventh control unit 607 is turned on, that is, the voltage between the base and the emitter of the transistor is greater than 0.7V, and the NPN transistor is turned on; the seventh control unit 607 is turned on so that the base voltage of the eighth control unit 608 is low, and the NPN transistor conduction condition cannot be met, so the eighth control unit 608 is not turned on; at this time, the V gs The conduction threshold of the PMOS tube is not reached, that is, the PMOS tube is not conducting, then U R Output U R _IN is 12V.

[0094] When the first device and the second device are powered at the same time, and U R _IN is 12V, U RWhen _OUT is 12V, the seventh control unit 607 is turned on, that is, the voltage between the base and the emitter of the transistor is greater than 0.7V, and the NPN transistor is turned on; the seventh control unit 607 is turned on so that the base voltage of the eighth control unit 608 is low, and the NPN transistor conduction condition cannot be met, so the eighth control unit 608 is not turned on; at this time, the V gs The conduction threshold of the PMOS tube is not reached, that is, the PMOS tube is not conducting, then U R Output U R _IN is 12V.

[0095] The present application also provides a dual-function household appliance, which includes: a first device and a second device, wherein the first device and the second device share a functional circuit as shown in the above embodiment to realize the function of the first device and the function of the second device.

[0096] The present application also provides a memory chip, in which the functional circuits shown in the above embodiments are stored.

[0097] It will be appreciated by those skilled in the art that all or some of the steps, systems, and functional modules / units in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. In hardware implementations, the division between the functional modules / units mentioned in the above description does not necessarily correspond to the division of physical components; for example, a physical component may have multiple functions, or a function or step may be performed by several physical components in cooperation. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or implemented as hardware, or implemented as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and can be accessed by a computer. In addition, it is well known to those of ordinary skill in the art that communication media typically contain computer-readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0098] So far, the technical solution of the present application has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments, and the above embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A functional circuit, It is characterized in that The functional circuit comprises: a first receiving unit, a first sending unit, a second receiving unit, a second sending unit, a first transmission unit and a second transmission unit; The first receiving unit is connected to the first sending unit via the first transmission unit and the second transmission unit; The second receiving unit is connected to the second sending unit via the first transmission unit and the second transmission unit; The first sending unit is used to send a communication signal of the second device so that the first receiving unit receives the communication signal of the second device; The second sending unit is used to send a communication signal of the first device, so that the second receiving unit receives the communication signal of the first device.

2. The functional circuit according to claim 1, It is characterized in that The functional circuit further includes: a first limiting unit, a second limiting unit, a third limiting unit and a fourth limiting unit; The first limiting unit is arranged in the first receiving unit, and the first limiting unit is used to limit the input voltage of the first receiving unit; The second limiting unit is arranged in the first sending unit, and the second limiting unit is used to limit the output voltage of the first sending unit; The third limiting unit is arranged in the second receiving unit, and the third limiting unit is used to limit the input voltage of the second receiving unit; The fourth limiting unit is disposed in the second sending unit, and the fourth limiting unit is used to limit an output voltage of the second sending unit.

3. The functional circuit according to claim 2, It is characterized in that The functional circuit further includes: a first filtering unit, a second filtering unit, a third filtering unit and a fourth filtering unit; The first filtering unit is connected to the first receiving unit, and the first filtering unit is used to filter the high-frequency signal received by the first receiving unit; The second filtering unit is connected to the second sending unit, and the second filtering unit is used to filter the high-frequency signal sent by the second sending unit; The third filtering unit is connected to the first transmission unit, and the third filtering unit is used to filter the interference signal received by the first transmission unit; The fourth filtering unit is connected to the second transmitting unit, and the fourth filtering unit is used to filter the interference signal received by the second transmitting unit.

4. The functional circuit according to claim 3, It is characterized in that The functional circuit further comprises: a first control unit, a second control unit, a third control unit and a fourth control unit; The first control unit is arranged in the first receiving unit, and the first control unit is used to control the level received by the first receiving unit; The second control unit is arranged in the first sending unit, and the second control unit is used to control the level sent by the first sending unit; The third control unit is arranged in the second receiving unit, and the third control unit is used to control the level received by the second receiving unit; The fourth control unit is arranged in the second sending unit, and the fourth control unit is used to control the level sent by the second sending unit.

5. The functional circuit according to claim 4, It is characterized in that The functional circuit further comprises: a detection unit; One end of the detection unit is connected to the first receiving unit, and the other end of the detection unit is connected to the second sending unit. When the first transmission unit is working and the second transmission unit is not working, the detection unit is used to transmit the communication signal sent by the second sending unit to the first receiving unit.

6. The functional circuit according to claim 4, It is characterized in that The functional circuit further includes: an anti-interference circuit, the anti-interference circuit includes: a fifth control unit and a sixth control unit, the fifth control unit and the sixth control unit are connected in series; The first input end of the anti-interference circuit is connected to the first limiting unit in the first receiving unit, the second input end of the anti-interference circuit is connected to the third filtering unit, and the output end of the anti-interference circuit is connected to the first control unit in the first receiving unit. The anti-interference circuit is used to prevent the communication signal of the first device from being transmitted to the second device through the fifth control unit and the sixth control unit when the first transmission unit is working and the second transmission unit is not working.

7. The functional circuit according to claim 4, It is characterized in that The functional circuit further includes: a protection unit, which includes: a seventh control unit, an eighth control unit, a MOS tube, a first voltage regulator tube and a second voltage regulator tube; The source of the MOS tube is connected to the third filtering unit, the gate of the MOS tube is connected to the first input end of the seventh control unit, and the drain of the MOS tube is connected to the input end of the first voltage regulator tube; The output end of the first Zener diode is connected to the output end of the second Zener diode, the input end of the second Zener diode is connected to the power supply end of the first transmission unit, the second input end of the seventh control unit is connected to the first input end of the eighth control unit, and the second input end of the eighth control unit is connected to the power supply end of the first transmission unit; the output ends of the seventh control unit and the eighth control unit are grounded.

8. The functional circuit according to claim 4, It is characterized in that The first transmission unit is an electronic component of the first device, and the second transmission unit is an electronic component of the second device; When the first device is running, the first transmission unit is in a working state; When the second device is running, the second transmission unit is in a working state.

9. A dual-function household appliance, It is characterized in that The dual-function household appliance comprises: a first device and a second device, wherein the first device and the second device share a functional circuit as described in any one of claims 1 to 8 to implement the functions of the first device and the second device.

10. A memory chip, It is characterized in that The memory chip stores the functional circuit according to any one of claims 1 to 8.

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