Signal conversion circuit and electrical equipment

Abstract

The utility model provides a signal conversion circuit and electrical equipment, and the signal conversion circuit comprises a data transmitting end which is used for being connected to a microcontroller so as to transmit signal data of the microcontroller; the transceiver comprises a receiving enabling end, and the receiving enabling end is used for receiving the signal data sent by the data sending end; one end of the time delay circuit is connected to the data transmitting end, and the other end of the time delay circuit is connected to the receiving enabling end; wherein the delay circuit is used for enabling the receiving enabling end to receive the signal data sent by the data sending end in a delayed manner. According to the signal conversion circuit provided by the utility model, when the data transmitting end transmits the signal data, the receiving enabling end of the transceiver can receive the signal data in a delayed manner, so that the data receiving end of the signal conversion circuit does not generate an invalid low-level signal, and the influence of the invalid low-level signal on the operation of the signal conversion circuit is avoided; and continuous and stable operation of the signal conversion circuit is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of communications, in particular to a signal conversion circuit and electrical equipment. Background Art

[0002] In the related art, during the operation of the RS-485 (serial communication interface standard) signal conversion circuit, when the data transmitting end sends signal data, the data receiving end will receive a low-level signal. The low-level signal is due to the fact that when the data transmitting end sends data, the level changes from high to low, and the receiving enable end of the transceiver changes from prohibiting the receiving signal to allowing the receiving signal, so that the data receiving end receives the low-level signal. The low-level signal is actually an invalid signal, which will affect the operation of the signal conversion circuit. Therefore, how to achieve that when the data transmitting end sends signal data, the data receiving end will not receive the invalid signal has become a technical problem that needs to be solved urgently. Utility Model Content

[0003] The utility model aims at least to solve the problem existing in the prior art that when a data transmitting end sends signal data, a data receiving end receives an invalid level signal.

[0004] To this end, a first aspect of the utility model provides a signal conversion circuit.

[0005] A second aspect of the utility model provides an electrical device.

[0006] The first aspect of the utility model provides a signal conversion circuit, comprising: a data sending end, used to be connected to a microcontroller to send signal data of the microcontroller; a transceiver, the transceiver includes a receiving enable end, the receiving enable end is used to receive the signal data sent by the data sending end; a delay circuit, one end of the delay circuit is connected to the data sending end, and the other end of the delay circuit is connected to the receiving enable end; wherein the delay circuit is used to enable the receiving enable end to delay receiving the signal data sent by the data sending end.

[0007] The signal conversion circuit provided by the utility model can be used to convert signal data sent by a microcontroller, thereby improving the data transmission efficiency of electrical equipment during operation.

[0008] The signal conversion circuit includes a data transmitting end and a transceiver. The data transmitting end is used to connect to a microcontroller so as to transmit the signal data generated by the microcontroller. Accordingly, the transceiver includes a receiving enable end. When the microcontroller generates signal data, the data transmitting end can send the signal data to the receiving enable end of the transceiver. When the receiving enable end of the transceiver receives the signal data, the transceiver can convert and process the signal data of the microcontroller, thereby realizing the signal conversion function of the signal conversion circuit.

[0009] Furthermore, the signal conversion circuit also includes a delay circuit, and the delay circuit is used to delay the reception of the signal data sent by the data transmitting end by the receiving enable end. That is, when the data transmitting end sends signal data to the receiving enable end of the transceiver, due to the delay circuit, the signal data sent by the data transmitting end will not reach the receiving enable end at the first time, but will be received by the receiving enable end after a delay of a certain period of time. In this way, when the data transmitting end sends signal data, the level changes from high to low, but the receiving enable end of the transceiver will not change from prohibiting the reception signal to allowing the reception signal at the first time, so no low-level signal will be generated at the data receiving end of the signal conversion circuit, that is, no invalid level signal will be generated, and further, no influence will be caused during the operation of the signal conversion circuit, thereby ensuring the stable operation of the signal conversion circuit.

[0010] The signal conversion circuit provided by the utility model includes a data transmitting end and a transceiver, wherein the data transmitting end is used to transmit the signal data generated by the microcontroller, and the receiving enable end of the transceiver is used to receive the signal data transmitted by the data transmitting end, so as to realize the conversion of the signal data through the transceiver. Furthermore, the signal conversion circuit also includes a delay circuit, which is arranged between the data transmitting end and the receiving enable end of the transceiver, so that when the data transmitting end transmits the signal data, the receiving enable end of the transceiver can delay receiving the signal data, thereby making the data receiving end of the signal conversion circuit not generate an invalid low-level signal, so as to avoid the invalid low-level signal from affecting the operation of the signal conversion circuit, and ensure that the signal conversion circuit can operate continuously and stably.

[0011] In addition, the signal conversion circuit in the above technical solution provided by the utility model may also have the following additional technical features:

[0012] In some technical solutions, optionally, the delay circuit includes: a first resistor, a first end of the first resistor is connected to a data sending end, and a second end of the first resistor is connected to a receiving enable end; a first capacitor, a first end of the first capacitor is connected to a second end of the first resistor, and a second end of the first capacitor is grounded.

[0013] In this technical solution, the delay circuit may include a first resistor and a first capacitor, and an RC circuit (resistance-capacitance circuit) may be formed by the first resistor and the first capacitor. It can be understood that the RC circuit can realize the function of storing charge, that is, when the data sending end sends signal data to the receiving enable end of the transceiver, the charge can be stored through the delay circuit, so that the signal data will not be transmitted to the receiving enable end of the transceiver at the first time, thereby realizing delayed reception of the receiving enable end of the transceiver.

[0014] By setting the delay circuit as the first resistor and the first capacitor, the delay circuit can be set as an RC circuit, and the function of storing charge of the RC circuit is utilized to realize the delay effect of the delay circuit, that is, to achieve the purpose of delaying the receiving enable end of the transceiver to receive the signal data, thereby avoiding the data receiving end of the signal conversion circuit from generating an invalid low-level signal when the data transmitting end sends the signal data, thereby ensuring the stable operation of the signal conversion circuit. At the same time, the delay circuit is simple in structure, easy to implement, and low in cost, thereby improving the market competitiveness of the signal conversion circuit.

[0015] In some technical solutions, optionally, the resistance value of the first resistor is greater than 4.5 kilo-ohms and less than 5 kilo-ohms; the capacitance value of the first capacitor is greater than or equal to 220 picofarads and less than or equal to 330 picofarads.

[0016] In this technical solution, the resistance value of the first resistor can be set between 4.5 kilo-ohms and 5 kilo-ohms, and correspondingly, the capacitance value of the first capacitor can be set between 220 pico-farads and 330 pico-farads. That is, by setting the resistance value of the first resistor and the capacitance value of the first capacitor, it can be ensured that the delay circuit can effectively store and process the charge when the data transmitting end sends the signal data, thereby ensuring the delay effect of the delay circuit.

[0017] In some technical solutions, optionally, the signal conversion circuit also includes: a data receiving end, used to be connected to the microcontroller to send the converted signal data to the microcontroller, and the data receiving end is connected to the data output end of the transceiver.

[0018] In this technical solution, the signal converter also includes a data receiving end, which is used to connect to the microcontroller to receive the signal data after conversion by the transceiver, that is, for the microcontroller to receive the signal data after conversion.

[0019] Specifically, one end of the data receiving end is connected to the microcontroller to transmit the received converted signal to the microcontroller, and the other end of the data receiving end is connected to the data output end of the transceiver. That is, the transceiver also includes a data output end, and after the receiving enable end of the transceiver receives the signal data sent by the data transmitting end, the signal data can be converted and processed, and then the transceiver outputs the converted signal data through the data output end, that is, outputs it to the data receiving end, so that the data receiving end can transmit the converted signal data to the microcontroller.

[0020] In some technical solutions, optionally, the signal conversion circuit further includes: a second resistor, one end of the second resistor is connected to the data receiving end, and the other end of the second resistor is connected to the data output end.

[0021] In this technical solution, a second resistor may be provided between the data receiving end and the data output end of the transceiver, that is, one end of the second resistor is connected to the data receiving end, and the other end of the second resistor is connected to the data output end of the transceiver.

[0022] By setting the second resistor, the voltage between the data receiving end and the data output end of the transceiver can be stabilized by the second resistor, thereby ensuring that the signal data between the data receiving end and the data output end of the transceiver can be transmitted normally, so as to ensure the stable operation of the signal conversion circuit. At the same time, by setting the second resistor, the anti-interference performance of the signal conversion circuit during the signal data transmission process can be improved, and the electromagnetic field generated during the operation of other electrical components can be prevented from affecting the signal data transmission, thereby further improving the stability of the signal conversion circuit operation.

[0023] In some technical solutions, optionally, the transceiver further includes: a transmission enable terminal connected to the data transmission terminal.

[0024] In this technical solution, the transceiver also includes a transmission enable end, and the transmission enable end is also connected to the data transmission end.

[0025] Through the different functions of the transmit enable end and the receive enable end, the transceiver can realize the reception and transmission of signal data. Specifically, when the receive enable end is in a low level state, the transceiver is in a receive mode, that is, the transceiver can receive signal data. Correspondingly, when the transmit enable end is in a high level state, the transceiver is in a transmit mode, that is, the transceiver can send signal data.

[0026] In some technical solutions, optionally, the signal conversion circuit further includes: a third resistor, one end of the third resistor is connected to the transmission enable terminal, and the other end of the third resistor is connected to the data transmission terminal.

[0027] In this technical solution, the signal conversion circuit further includes a third resistor, and the third resistor is arranged between the transmission enable terminal and the data transmission terminal.

[0028] By setting the third resistor, the voltage between the data transmitting end and the transmitting enable end of the transceiver can be stabilized through the third resistor, thereby ensuring that the signal data between the data transmitting end and the transmitting enable end of the transceiver can be transmitted normally, so as to ensure the stable operation of the signal conversion circuit. At the same time, by setting the third resistor, the anti-interference performance of the signal conversion circuit during the signal data transmission process can be improved, and the electromagnetic field generated during the operation of other electrical components can be prevented from affecting the signal data transmission, thereby further improving the stability of the signal conversion circuit operation.

[0029] In some technical solutions, optionally, the transceiver also includes: a power supply terminal, used to connect to a power supply; a ground terminal, used to ground; a first differential signal output terminal, connected to the power supply terminal; and a second differential signal output terminal, connected to the ground terminal.

[0030] In this technical solution, the transceiver further includes a power supply terminal and a ground terminal, wherein the power supply terminal is used to connect to a power supply to provide a stable power supply to the transceiver. Specifically, the power supply terminal can be connected to a 5V power supply to provide a high level to the transceiver. Correspondingly, the ground terminal is used to connect to the ground to provide a low level during the operation of the transceiver.

[0031] Furthermore, the transceiver also includes a first differential signal output terminal and a second differential signal output terminal. By setting the first differential signal output terminal and the second differential signal output terminal, a differential signal can be output during the operation of the transceiver. By outputting the differential signal, common-mode interference can be suppressed when the operating environment is relatively complex and there is a lot of interference, thereby ensuring the stable operation of the transceiver.

[0032] Specifically, the first differential signal output terminal is connected to a power supply, and the second differential signal output terminal is grounded.

[0033] In some technical schemes, optionally, the signal conversion circuit also includes: a fourth resistor, one end of the fourth resistor is connected to the power supply terminal, and the other end of the fourth resistor is connected to the first differential signal output terminal; a fifth resistor, one end of the fifth resistor is connected to the ground terminal, and the other end of the fifth resistor is connected to the second differential signal output terminal.

[0034] In this technical solution, the signal conversion circuit also includes a fourth resistor, one end of the fourth resistor is connected to the power supply, and the other end of the fourth resistor is connected to the first differential signal output end, that is, the fourth resistor is arranged between the power supply and the first differential signal output end.

[0035] By setting the fourth resistor, when the first differential signal output end is idle, the voltage of the first differential signal output end can be clamped at a high level, and at the same time, a current limiting function is played to ensure the normal operation of the transceiver.

[0036] Furthermore, the signal conversion circuit further includes a fifth resistor, one end of which is connected to the ground terminal, that is, one end of the fifth resistor is grounded, and the other end of the fifth resistor is connected to the second differential signal output terminal. That is, the fifth resistor is arranged between the second differential signal output terminal and the ground terminal.

[0037] By setting the fifth resistor, when the second differential signal output terminal is idle, the voltage of the second differential signal output terminal can be clamped at a low level, and at the same time, a current limiting function is played to ensure the normal operation of the transceiver.

[0038] In some technical solutions, optionally, the signal conversion circuit also includes: a second capacitor, one end of the second capacitor is connected to the power supply end, and the other end of the second capacitor is connected to the ground end.

[0039] In this technical solution, the signal conversion circuit also includes a second capacitor, and the second capacitor is arranged between the power supply terminal and the ground terminal, that is, one end of the second capacitor is connected to the power supply terminal, and the other end of the second capacitor is connected to the ground terminal.

[0040] By providing the second capacitor, the second capacitor can be used to perform filtering, thereby ensuring the stability of power supply.

[0041] In some technical solutions, optionally, the transceiver further includes: a data input terminal; the signal conversion circuit further includes a sixth resistor, one end of the sixth resistor is connected to the data input terminal, and the other end of the sixth resistor is grounded.

[0042] In this technical solution, the transceiver further includes a data input terminal and a sixth resistor, wherein one end of the sixth resistor is connected to the data input terminal and the other end of the sixth resistor is grounded. That is, the data input terminal of the transceiver is grounded through the sixth resistor.

[0043] By grounding the data input terminal, a corresponding ground level can be provided during the operation of the transceiver to ensure the normal operation of the transceiver. At the same time, the sixth resistor is provided to improve the anti-interference of the signal conversion circuit during the signal data transmission process, avoid the electromagnetic field generated during the operation of other electrical components from affecting the signal data transmission, and further improve the stability of the signal conversion circuit operation.

[0044] A second aspect of the utility model provides an electrical device, comprising a signal conversion circuit as described in any one of the above technical solutions.

[0045] The electrical device provided by the utility model comprises the signal conversion circuit of any one of the above technical solutions. Therefore, the electrical device has all the beneficial effects of the above signal conversion circuit, which will not be described in detail here.

[0046] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0048] Figure 1 A circuit diagram of a signal conversion circuit provided by an embodiment of the utility model is shown;

[0049] Figure 2The structure block diagram of the electrical equipment provided by the embodiment of the utility model is shown.

[0050] in, Figure 1 and Figure 2 The corresponding relationship between the reference numerals and the component names is as follows:

[0051] 100 signal conversion circuit, 102 data transmission end, 104 transceiver, 106 receiving enable end, 108 delay circuit, 110 first resistor, 112 first capacitor, 114 data receiving end, 116 second resistor, 118 data output end, 120 transmission enable end, 122 third resistor, 124 power supply end, 126 ground end, 128 first differential signal output end, 130 second differential signal output end, 132 fourth resistor, 134 fifth resistor, 136 second capacitor, 138 data input end, 140 sixth resistor, 200 electrical equipment. DETAILED DESCRIPTION

[0052] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0053] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0054] Refer to the following Figure 1 and Figure 2 To describe the signal conversion circuit and electrical equipment provided according to some embodiments of the present invention.

[0055] The utility model provides a signal conversion circuit 100, such as Figure 1 As shown, the signal conversion circuit 100 includes: a data transmitting terminal 102 (TXD), which is used to be connected to a microcontroller (not shown in the figure) to send signal data to the microcontroller; a transceiver 104, the transceiver 104 includes a receiving enable terminal 106, and the receiving enable terminal 106 (RE#) is used to receive the signal data sent by the data transmitting terminal 102; a delay circuit 108, one end of the delay circuit 108 is connected to the data transmitting terminal 102, and the other end of the delay circuit 108 is connected to the receiving enable terminal 106; wherein the delay circuit 108 is used to enable the receiving enable terminal 106 to delay receiving the signal data sent by the data transmitting terminal 102.

[0056] The signal conversion circuit 100 provided by the present invention can be used to convert signal data sent by a microcontroller, thereby improving the data transmission efficiency of the electrical equipment during operation.

[0057] The signal conversion circuit 100 includes a data transmitting terminal 102 and a transceiver 104. The data transmitting terminal 102 is used to connect to a microcontroller so as to transmit the signal data generated by the microcontroller. Accordingly, the transceiver 104 includes a receiving enable terminal 106. When the microcontroller generates signal data, the data transmitting terminal 102 can send the signal data to the receiving enable terminal 106 of the transceiver 104. When the receiving enable terminal 106 of the transceiver 104 receives the signal data, the transceiver 104 can convert and process the signal data of the microcontroller, thereby realizing the signal conversion function of the signal conversion circuit 100. Specifically, the signal conversion circuit 100 can be an RS-485 circuit, and accordingly, the transceiver 104 is an RS-485 chip.

[0058] Furthermore, the signal conversion circuit 100 further includes a delay circuit 108, and the delay circuit 108 is used to delay the reception of the signal data sent by the data transmission end 102 by the reception enable end 106. That is, when the data transmission end 102 sends signal data to the reception enable end 106 of the transceiver 104, due to the provision of the delay circuit 108, the signal data sent by the data transmission end will not reach the reception enable end 106 immediately, but will be received by the reception enable end 106 after a delay of a certain period of time. In this way, when the data transmission end 102 sends signal data, the level changes from high to low, but the reception enable end 106 of the transceiver 104 will not change from the prohibition of receiving signal to the permission of receiving signal immediately, so that no low-level signal will be generated at the data reception end of the signal conversion circuit 100, that is, no invalid level signal will be generated, and further, no influence will be caused during the operation of the signal conversion circuit 100, thereby ensuring the stable operation of the signal conversion circuit 100.

[0059] Specifically, the delay circuit 108 is disposed between the data transmitting terminal 102 and the receiving enable terminal 106 of the transceiver 104. That is, one end of the delay circuit 108 is connected to the data transmitting terminal 102, and the other end of the delay circuit 108 is connected to the receiving enable terminal 106 of the transceiver 104.

[0060] The signal conversion circuit 100 provided by the utility model includes a data transmitting end 102 and a transceiver 104. The data transmitting end 102 is used to transmit the signal data generated by the microcontroller, and the receiving enable end 106 of the transceiver 104 is used to receive the signal data transmitted by the data transmitting end 102, so as to realize the conversion of the signal data through the transceiver 104. Further, the signal conversion circuit 100 also includes a delay circuit 108, which is arranged between the data transmitting end 102 and the receiving enable end 106 of the transceiver 104, so that when the data transmitting end 102 transmits the signal data, the receiving enable end 106 of the transceiver 104 can delay receiving the signal data, thereby making the data receiving end of the signal conversion circuit 100 not generate an invalid low-level signal, so as to avoid the invalid low-level signal from affecting the operation of the signal conversion circuit 100, and ensure that the signal conversion circuit 100 can operate continuously and stably.

[0061] In some embodiments, optionally, Figure 1 As shown, the delay circuit 108 includes a first resistor 110 and a first capacitor 112, wherein the first end of the first resistor 110 is connected to the data sending end 102, and the second end of the first resistor 110 is connected to the receiving enable end 106; and the first capacitor 112, wherein the first end of the first capacitor 112 is connected to the second end of the first resistor 110, and the second end of the first capacitor 112 is grounded.

[0062] In this embodiment, the delay circuit 108 may include a first resistor 110 and a first capacitor 112. An RC circuit may be formed by the first resistor 110 and the first capacitor 112. It can be understood that the RC circuit can store charge, that is, when the data sending end 102 sends signal data to the receiving enable end 106 of the transceiver 104, the charge can be stored through the delay circuit 108, so that the signal data will not be transmitted to the receiving enable end 106 of the transceiver 104 in the first time, that is, delayed reception of the receiving enable end 106 of the transceiver 104 is achieved.

[0063] Specifically, the first end of the first resistor 110 is connected to the data transmitting end 102, and the second end of the first resistor 110 is connected to the receiving enable end 106 of the transceiver 104. Correspondingly, the first end of the first capacitor 112 is connected to the second end of the first resistor 110, and the second end of the first capacitor 112 is grounded. That is, the first resistor 110 and the first capacitor 112 are connected in parallel, so that the first resistor 110 and the first capacitor 112 form an RC circuit, that is, the delay circuit 108, and then the receiving enable end 106 of the transceiver 104 delays receiving the signal data of the transmitting end of the data transmitting end 102.

[0064] By setting the delay circuit 108 as the first resistor 110 and the first capacitor 112, the delay circuit 108 can be set as an RC circuit, and the function of storing charge of the RC circuit is utilized to achieve the delay effect of the delay circuit 108, that is, to achieve the purpose of delaying the reception of signal data by the receiving enable terminal 106 of the transceiver 104, thereby avoiding the data receiving terminal of the signal conversion circuit 100 from generating an invalid low-level signal when the data transmitting terminal 102 sends signal data, thereby ensuring the stable operation of the signal conversion circuit 100. At the same time, the delay circuit 108 is simple in structure, easy to implement, and low in cost, thereby improving the market competitiveness of the signal conversion circuit 100.

[0065] Furthermore, the resistance value of the first resistor 110 is greater than 4.5 kilo-ohms and less than 5 kilo-ohms; the capacitance value of the first capacitor 112 is greater than or equal to 220 pF and less than or equal to 330 pF.

[0066] Specifically, the resistance value of the first resistor 110 can be set between 4.5 kilo-ohms and 5 kilo-ohms, and correspondingly, the capacitance value of the first capacitor 112 can be set between 220 pF and 330 pF. That is, by setting the resistance value of the first resistor 110 and the capacitance value of the first capacitor 112, it can be ensured that the delay circuit 108 can effectively store and process the charge when the data transmitting end 102 sends the signal data, thereby ensuring the delay effect of the delay circuit 108.

[0067] It can be understood that in the signal conversion circuit 100, the high level is usually 5V and the low level is grounded. Therefore, by setting the resistance value of the first resistor 110 between 4.5 kilo-ohms and 5 kilo-ohms and the capacitance value of the first capacitor 112 between 220 pico-farads and 330 pico-farads, the effective storage and release of charges during the high and low level conversion process can be met, thereby ensuring the delay effect of the delayed telegraph circuit.

[0068] Specifically, the resistance value of the first resistor 110 can be set to 4.7 kilo-ohms, and the capacitance of the first capacitor 112 can be set to 220 pF.

[0069] In some embodiments, optionally, Figure 1 As shown, the signal conversion circuit 100 further includes a data receiving terminal 114 (RXD), which is used to connect to the microcontroller to send the converted signal data to the microcontroller, and the data receiving terminal 114 is connected to a data output terminal 118 (RO) of the transceiver 104 .

[0070] In this embodiment, the signal converter further includes a data receiving terminal 114, which is used to connect to the microcontroller to receive the signal data converted by the transceiver 104, that is, to allow the microcontroller to receive the signal data converted.

[0071] Specifically, one end of the data receiving end 114 is connected to the microcontroller to transmit the received converted signal to the microcontroller, and at the same time, the other end of the data receiving end 114 is connected to the data output end 118 of the transceiver 104. That is, the transceiver 104 also includes the data output end 118, and after the receiving enable end 106 of the transceiver 104 receives the signal data sent by the data transmitting end 102, the signal data can be converted and processed, and then the transceiver 104 converts the converted signal data through the data output end 118, that is, outputs it to the data receiving end 114, so that the data receiving end 114 can transmit the converted signal data to the microcontroller.

[0072] Furthermore, the signal conversion circuit 100 further includes a second resistor 116 , one end of the second resistor 116 is connected to the data receiving end 114 , and the other end of the second resistor 116 is connected to the data output end 118 .

[0073] Specifically, a second resistor 116 may be provided between the data receiving terminal 114 and the data output terminal 118 of the transceiver 104 , that is, one end of the second resistor 116 is connected to the data receiving terminal 114 , and the other end of the second resistor 116 is connected to the data output terminal 118 of the transceiver 104 .

[0074] By providing the second resistor 116, the voltage between the data receiving terminal 114 and the data output terminal 118 of the transceiver 104 can be stabilized by the second resistor 116, thereby ensuring that the signal data between the data receiving terminal 114 and the data output terminal 118 of the transceiver 104 can be transmitted normally, so as to ensure the stable operation of the signal conversion circuit 100. At the same time, by providing the second resistor 116, the anti-interference performance of the signal conversion circuit 100 during the signal data transmission process can be improved, and the electromagnetic field generated during the operation of other electrical components can be prevented from affecting the signal data transmission, thereby further improving the stability of the operation of the signal conversion circuit 100.

[0075] In some embodiments, optionally, Figure 1 As shown, the transceiver 104 further includes a transmit enable terminal 120 (DE), which is connected to the data transmitting terminal 102 .

[0076] In this embodiment, the transceiver 104 further includes a transmission enable terminal 120 , and the transmission enable terminal 120 is also connected to the data transmission terminal 102 .

[0077] Through the different functions of the transmit enable terminal 120 and the receive enable terminal 106, the transceiver 104 can receive and send signal data. Specifically, when the receive enable terminal 106 is in a low level state, the transceiver 104 is in a receive mode, that is, the transceiver 104 can receive signal data. Correspondingly, when the transmit enable terminal 120 is in a high level state, the transceiver 104 is in a transmit mode, that is, the transceiver 104 can send signal data.

[0078] Furthermore, the signal conversion circuit 100 further includes a third resistor 122 , one end of the third resistor 122 is connected to the transmission enable terminal 120 , and the other end of the third resistor 122 is connected to the data transmission terminal 102 .

[0079] Specifically, the signal conversion circuit 100 further includes a third resistor 122 , which is disposed between the transmission enable terminal 120 and the data transmission terminal 102 .

[0080] By setting the third resistor 122, the voltage between the data transmitting end 102 and the transmitting enable end 120 of the transceiver 104 can be stabilized through the third resistor 122, thereby ensuring that the signal data between the data transmitting end 102 and the transmitting enable end 120 of the transceiver 104 can be transmitted normally, so as to ensure the stable operation of the signal conversion circuit 100. At the same time, by setting the third resistor 122, the anti-interference performance of the signal conversion circuit 100 during the signal data transmission process can be improved, and the electromagnetic field generated during the operation of other electrical components can be prevented from affecting the signal data transmission, thereby further improving the stability of the operation of the signal conversion circuit 100.

[0081] In some embodiments, optionally, Figure 1 As shown, the transceiver 104 also includes a power supply terminal 124 (VCC) and a ground terminal 126 (GND), the power supply terminal 124 is used to connect to a power supply (not shown in the figure); the ground terminal 126 is used for grounding; it also includes a first differential signal output terminal 128 (A) and a second differential signal output terminal 130 (B), the first differential signal output terminal 128 is connected to the power supply terminal 124; the second differential signal output terminal 130 is connected to the ground terminal 126.

[0082] In this embodiment, the transceiver 104 further includes a power supply terminal 124 and a ground terminal 126, wherein the power supply terminal 124 is used to be connected to a power supply to provide a stable power supply to the transceiver 104. Specifically, the power supply terminal 124 can be connected to a 5V power supply to provide a high level to the transceiver 104. Accordingly, the ground terminal 126 is used to be grounded to provide a low level during the operation of the transceiver 104.

[0083] Furthermore, the transceiver 104 also includes a first differential signal output terminal 128 and a second differential signal output terminal 130. By setting the first differential signal output terminal 128 and the second differential signal output terminal 130, a differential signal can be output during the operation of the transceiver 104. By outputting the differential signal, common-mode interference can be suppressed when the operating environment is relatively complex and there is a lot of interference, thereby ensuring the stable operation of the transceiver 104.

[0084] Specifically, the first differential signal output terminal 128 is connected to a power source, and the second differential signal output terminal 130 is grounded.

[0085] Furthermore, if Figure 1 As shown, the signal conversion circuit 100 also includes a fourth resistor 132 and a fifth resistor 134, one end of the fourth resistor 132 is connected to the power supply terminal 124, and the other end of the fourth resistor 132 is connected to the first differential signal output terminal 128; one end of the fifth resistor 134 is connected to the ground terminal 126, and the other end of the fifth resistor 134 is connected to the second differential signal output terminal 130.

[0086] Specifically, the signal conversion circuit 100 also includes a fourth resistor 132, one end of the fourth resistor 132 is connected to the power supply, and the other end of the fourth resistor 132 is connected to the first differential signal output terminal 128, that is, the fourth resistor 132 is arranged between the power supply and the first differential signal output terminal 128.

[0087] By setting the fourth resistor 132 , when the first differential signal output terminal 128 is idle, the voltage of the first differential signal output terminal 128 can be clamped at a high level, and at the same time, a current limiting function is provided to ensure the normal operation of the transceiver 104 .

[0088] Furthermore, if Figure 1 As shown, the signal conversion circuit 100 further includes a fifth resistor 134, one end of the fifth resistor 134 is connected to the ground terminal 126, that is, one end of the fifth resistor 134 is grounded, and the other end of the fifth resistor 134 is connected to the second differential signal output terminal 130. That is, the fifth resistor 134 is arranged between the second differential signal output terminal 130 and the ground terminal 126.

[0089] By setting the fifth resistor 134 , when the second differential signal output terminal 130 is idle, the voltage of the second differential signal output terminal 130 can be clamped at a low level, and at the same time, a current limiting function is provided to ensure the normal operation of the transceiver 104 .

[0090] In some embodiments, optionally, Figure 1As shown, the signal conversion circuit 100 further includes a second capacitor 136 , one end of the second capacitor 136 is connected to the power supply terminal 124 , and the other end of the second capacitor 136 is connected to the ground terminal 126 .

[0091] In this embodiment, the signal conversion circuit 100 also includes a second capacitor 136, and the second capacitor 136 is arranged between the power supply terminal 124 and the ground terminal 126, that is, one end of the second capacitor 136 is connected to the power supply terminal 124, and the other end of the second capacitor 136 is connected to the ground terminal 126.

[0092] By providing the second capacitor 136 , the second capacitor 136 can be used to perform filtering, thereby ensuring the stability of power supply.

[0093] In some embodiments, optionally, Figure 1 As shown, the transceiver 104 further includes a data input terminal 138; the signal conversion circuit 100 further includes a sixth resistor 140, one end of the sixth resistor 140 is connected to the data input terminal 138 (DI), and the other end of the sixth resistor 140 is grounded.

[0094] In this embodiment, the transceiver 104 further includes a data input terminal 138 and a sixth resistor 140, wherein one end of the sixth resistor 140 is connected to the data input terminal 138, and the other end of the sixth resistor 140 is grounded. That is, the data input terminal 138 of the transceiver 104 is grounded through the sixth resistor 140.

[0095] By grounding the data input terminal 138, a corresponding ground level can be provided during the operation of the transceiver 104 to ensure the normal operation of the transceiver 104. At the same time, the sixth resistor 140 is provided to improve the anti-interference performance of the signal conversion circuit 100 during the signal data transmission process, avoid the electromagnetic field generated during the operation of other electrical components from affecting the signal data transmission, and further improve the stability of the operation of the signal conversion circuit 100.

[0096] In some embodiments, Figure 2 As shown, the utility model further provides an electrical device 200, comprising a signal conversion circuit 100 as in any one of the above embodiments.

[0097] The electrical device 200 provided by the present invention comprises the signal conversion circuit 100 of any one of the above embodiments. Therefore, the electrical device 200 has all the beneficial effects of the above signal conversion circuit 100, which will not be described in detail here.

[0098] Specifically, the electrical equipment 200 may include construction machinery, household electrical appliances, etc.

[0099] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0100] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0101] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A signal conversion circuit, characterized in that: include: A data sending end, used to be connected to a microcontroller to send signal data of the microcontroller; A transceiver, the transceiver comprising a receiving enable end, the receiving enable end being used to receive signal data sent by the data sending end; A delay circuit, one end of which is connected to the data transmitting end, and the other end of which is connected to the receiving enabling end; The delay circuit is used to delay the reception of the signal data sent by the data sending end by the receiving enabling end.

2. The signal conversion circuit according to claim 1, characterized in that: The delay circuit comprises: A first resistor, a first end of the first resistor is connected to the data transmitting end, and a second end of the first resistor is connected to the receiving enable end; A first capacitor, wherein a first end of the first capacitor is connected to a second end of the first resistor, and a second end of the first capacitor is grounded.

3. The signal conversion circuit according to claim 2, characterized in that: The resistance value of the first resistor is greater than 4.5 kilo-ohms and less than 5 kilo-ohms; The capacitance value of the first capacitor is greater than or equal to 220 pico-farads and less than or equal to 330 pico-farads.

4. The signal conversion circuit according to any one of claims 1 to 3, characterized in that: Also includes: The data receiving end is used to be connected to the microcontroller to send the converted signal data to the microcontroller, and the data receiving end is connected to the data output end of the transceiver.

5. The signal conversion circuit according to claim 4, characterized in that: Also includes: A second resistor, one end of the second resistor is connected to the data receiving end, and the other end of the second resistor is connected to the data output end.

6. The signal conversion circuit according to any one of claims 1 to 3, characterized in that: The transceiver further comprises: A sending enable terminal connected to the data sending terminal.

7. The signal conversion circuit according to claim 6, characterized in that: Also includes: A third resistor, one end of the third resistor is connected to the transmission enable end, and the other end of the third resistor is connected to the data transmission end.

8. The signal conversion circuit according to any one of claims 1 to 3, characterized in that: The transceiver further comprises: A power terminal, used for connecting to a power source; Ground terminal, used for grounding; A first differential signal output terminal connected to the power supply terminal; The second differential signal output terminal is connected to the ground terminal.

9. The signal conversion circuit according to claim 8, characterized in that: The signal conversion circuit also includes: a fourth resistor, one end of the fourth resistor being connected to the power supply end, and the other end of the fourth resistor being connected to the first differential signal output end; A fifth resistor, one end of the fifth resistor is connected to the ground end, and the other end of the fifth resistor is connected to the second differential signal output end.

10. The signal conversion circuit according to claim 8, characterized in that: The signal conversion circuit also includes: A second capacitor, one end of the second capacitor is connected to the power supply end, and the other end of the second capacitor is connected to the ground end.

11. The signal conversion circuit according to any one of claims 1 to 3, characterized in that: The transceiver further comprises: Data input terminal; The signal conversion circuit further includes a sixth resistor, one end of the sixth resistor is connected to the data input end, and the other end of the sixth resistor is grounded.

12. An electrical device, characterized in that: include: The signal conversion circuit according to any one of claims 1 to 11.

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