CN217739899U - Long-distance strong driving circuit used for single bus protocol - Google Patents
Long-distance strong driving circuit used for single bus protocol Download PDFInfo
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- CN217739899U CN217739899U CN202221564683.XU CN202221564683U CN217739899U CN 217739899 U CN217739899 U CN 217739899U CN 202221564683 U CN202221564683 U CN 202221564683U CN 217739899 U CN217739899 U CN 217739899U
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Abstract
The utility model relates to a long-distance strong driving circuit used for a single bus protocol. The circuit comprises an integrated circuit 74HCLG125GV, a mos field effect transistor M2, a PNP triode U18, an NPN triode U23, an NPN triode U16, a PNP triode U18, a 1_ wire _ in _2 port, a 1_ wire _ pu _2 port, a 1_ wire _ out _2 port, a 1_ wire _ pd _2 port and the like. The long-distance strong driving circuit used for the single bus protocol is added in a sensor circuit of the single bus protocol, the driving capability is enhanced through the circuit, and the communication distance of a one-wire sensor is longer and can reach hundreds of meters; in addition, the circuit is simple and reliable, multiple sensors can be driven at the same time, and the equipment cost is greatly reduced.
Description
Technical Field
The utility model relates to a strong drive circuit of long distance that monobus agreement used.
Background
As shown in fig. 2, a resistor is connected to a VDD terminal at a signal terminal DQ of a peripheral circuit used by a common one-wire protocol sensor, and the resistor can pull up the DQ terminal in a communication process, but when a long distance, such as a communication distance of tens of meters or hundreds of meters, is long, or when a plurality of sensors are required to be connected in parallel for communication, the DQ terminal has a large load and is also easily interfered by the outside.
The method is commonly used for pulling up a DQ signal by adding a pull-up resistor, but the method cannot keep one-wire communication normal under the condition of long distance and multipoint parallel connection and cannot meet the requirement of normal communication. Therefore, if a plurality of sensors are required to be read at a long distance or simultaneously, a special design needs to be carried out on a driving circuit to ensure that the communication is normal.
SUMMERY OF THE UTILITY MODEL
The utility model provides a can solve the strong drive circuit of long distance that single bus protocol of long distance multiple spot communication used, solve the method in the past and can keep one-wire normal problem of communication under the parallelly connected condition of long distance and multiple spot.
The purpose of the utility model is realized like this:
a long-distance strong driving circuit used by a single bus protocol is provided with a resistor R30, two ends of the resistor R30 are respectively connected with a 5V power supply VCC and the anode of a light emitting diode U13, the cathode of the light emitting diode U13 is connected with a 4 pin and a 1 wire in 2 port of an integrated circuit, the 5 pin of the integrated circuit is connected with the power supplies VCC and a capacitor C23 of 100nF, and the other end of the capacitor C23 is grounded; pins 1 and 3 of the integrated circuit are grounded, pin 2 is connected with a first resistor R31, the other end of the first resistor R31 is respectively connected with the cathode of a diode U22 and a diode U53 and one end of a capacitor C25 and one end of a second resistor R46, pin 2 of the integrated circuit is also connected with pin 3 of a mos field effect tube M2, pin 3 of a collector of a PNP triode U18 and pin 3 of an emitter of an NPN triode U23, the other ends of the diode U22, the diode U53 and the capacitor C25 are grounded, pin 2 of the mos field effect tube M2 is connected with a power supply VCC, pin 1 is connected with a third resistor R38, the other end of the third resistor R38 is connected with a fourth resistor R33 and the collector of the NPN triode U16, and the other end of the third resistor R38 is connected with the power supply VCC; the emitter of the NPN triode U16 is grounded, the base is connected to the fifth resistor R37, the other end of the fifth resistor R37 is connected to the sixth resistor R39 and the port of 1 \ U wire \ U2, the emitter of the PNP triode U18 is connected to the seventh resistor R44 of 27 ohms, the other end of the seventh resistor R44 is connected to the 5V power source VCC, the base of the PNP triode U18 is connected to the eighth resistor R47, the other end of the eighth resistor R47 is connected to the ninth resistor R45 and the port of 1 \ U wire out U2, the other end of the ninth resistor R45 is connected to the power source VCC, the emitter of the NPN triode U23 is grounded, the base is connected to the tenth resistor R50, the other end of the tenth resistor R50 is connected to the ports of the eleventh resistor R53 and 1 \ U wire \ U p 2, and the other end of the eleventh resistor R53 is grounded.
Compared with the prior art, the beneficial effects of the utility model are that:
the long-distance strong driving circuit used by the single bus protocol is added in the sensor circuit of the single bus protocol, the driving capability is enhanced through the circuit, and the communication distance of the one-wire sensor is longer and can reach hundreds of meters; in addition, the circuit is simple and reliable, a plurality of sensors can be driven simultaneously, and the equipment cost is greatly reduced.
Drawings
Fig. 1 is a schematic diagram of a long-distance strong driving circuit used by the single bus protocol of the present invention.
Fig. 2 is a schematic diagram of a peripheral circuit used in a sensor of a conventional one-wire protocol.
Wherein: the integrated circuit comprises a resistor R30, a power supply VCC, a light emitting diode U13, an integrated circuit 74HCLG125GV, a capacitor C23, a first resistor R31, a diode U22, a diode U53, a capacitor C25, a second resistor R46, a mos field effect transistor M2, a PNP triode U18, an NPN triode U23, a capacitor C25, a third resistor R38, a fourth resistor R33, an NPN triode U16, a fifth resistor R37, a sixth resistor R39, a PNP triode U18, a seventh resistor R44, an eighth resistor R47, a ninth resistor R45, a tenth resistor R50, an eleventh resistor R53, a 1/wire/in/2 port, a 1/wire/pu/2 port, a 1/out/U2 port, and a 1/w/pd/pu 2 port.
Detailed Description
Referring to fig. 1, the present invention relates to a long-distance strong driving circuit used in a single bus protocol, the circuit has a resistor R30, two ends of the resistor R30 are respectively connected to a 5V power VCC and an anode of a light emitting diode U13, a cathode of the light emitting diode U13 is connected to a 4 pin and a 1/U wire in 2 port of an integrated circuit 74HCLG125GV, a 5 pin of the integrated circuit 74HCLG125GV is connected to a 5V power VCC and a capacitor C23 of 100nF, and the other end of the capacitor C23 is grounded; pins 1 and 3 of the integrated circuit 74HCLG125GV are grounded, pin 2 of the integrated circuit 74HCLG125GV is grounded, the other end of the first resistor R31 is respectively connected with a diode U22 (SS 14), a cathode of a diode U53 (1N 4148) and one ends of a capacitor C25 of 10nF and a second resistor R46 of 1.1K, pin 2 of the integrated circuit 74HCLG125GV is also connected with pin 3 of a mos field effect transistor M2 (FDN 5618P), pin 3 of a collector of a PNP triode U18 (S9012), pin 3 of an emitter of an NPN triode U23 (SS 8050), and the other ends of the diode U22, the diode U53 and the capacitor C25 are grounded. A pin 2 of the mos field effect transistor M2 is connected with a 5V power supply VCC, a pin 1 of the mos field effect transistor M2 is connected with a pin 2.2K third resistor R38, the other end of the third resistor R38 is connected with a fourth resistor R33 of 10K and a collector of an NPN triode U16 (SS 8050), and the other end of the third resistor R38 is connected with the 5V power supply VCC; the emitter of the NPN transistor U16 is grounded, the base thereof is connected to the fifth resistor R37 of 1.5K, the other end of the fifth resistor R37 is connected to the sixth resistor R39 of 4.7K and the port of 1 _w/w 2, the emitter of the PNP transistor U18 of type S9012 is connected to the seventh resistor R44 of 27 ohms, the other end of the seventh resistor R44 is connected to the 5V power VCC, the base of the PNP transistor U18 is connected to the eighth resistor R47 of 2.2K, the other end of the eighth resistor R47 is connected to the ninth resistor R45 of 10K and the port of 1 _w/w/U2, the other end of the ninth resistor R45 is connected to the 5V power VCC, the emitter of the NPN transistor U23 is grounded, the base thereof is connected to the tenth resistor R50 of 1.5K, the other end of the tenth resistor R50 is connected to the port of 4.7K and the ports of 1 _w/w/pd/p 2, and the other end of the eleventh resistor R53 is grounded.
The utility model discloses a drive circuit theory of operation does:
the diode U53 and the diode U22 can play a role in rectification, so that communication signals are kept stable; the 1_wire _in _2port is used for reading high and low level signals output by the sensor; when a signal needs to be transmitted to the sensor, 1 wire \uout \u2 needs to be set to a low level, and then when a high level signal needs to be transmitted, 1 wire \upu \u2 needs to be set to a high level, and when a low level signal needs to be transmitted, 1 wire \upd \u2 needs to be set to a high level.
When the 1 wire wu 2 is set to be at a high level and the 1 wire out 2 is set to be at a high level, the mos field effect transistor M2 is turned on, so that the driving capability is enhanced, the host can support communication of more distant and more one _ wire devices, and the driving capability of the mode is strongest; the 1 wire wu 2 is set to be at a low level, when the 1 wire wu out 2 is set to be at the low level, the mos field effect transistor M2 is closed, the PNP triode U18 is opened, and at this time, the 1 wire wu 2 can be pulled high, and the driving capability of the PNP triode U18 is smaller than that of the mos field effect transistor M2, so that the driving capability is weaker than that of the 1U wire wu 2 when the port is used, but is also greatly stronger than that of a single pull-up resistor, and the port can be flexibly applied according to the use condition; when 1 w wire pd 2 is set high, NPN transistor U23 is turned on and the signal is pulled low, so that the port is used to output a low signal. When the other ports are controlled to send high level signals, 1 wire pd 2 needs to be set to low level, and the NPN triode U23 is turned off.
The pulling-up and pulling-down of each port can be set through software, so that the driving capability is enhanced, and the communication distance of the one-wire sensor is longer and can reach hundreds of meters; in addition, the circuit is simple and reliable, and can drive a plurality of sensors simultaneously, so that the equipment cost is greatly reduced.
Claims (2)
1. A long-distance strong driving circuit used by a single bus protocol is characterized in that: the circuit is provided with a resistor R30, two ends of the resistor R30 are respectively connected with a 5V power supply VCC and the anode of a light emitting diode U13, the cathode of the light emitting diode U13 is connected with a 4 pin and a 1 wire in 2 port of an integrated circuit, a 5 pin of the integrated circuit is connected with power supplies VCC and a capacitor C23 of 100nF, and the other end of the capacitor C23 is grounded; pins 1 and 3 of the integrated circuit are grounded, pin 2 is connected with a first resistor R31, the other end of the first resistor R31 is respectively connected with the cathode of a diode U22 and a diode U53 and one end of a capacitor C25 and one end of a second resistor R46, pin 2 of the integrated circuit is also connected with pin 3 of a mos field effect tube M2, pin 3 of a collector of a PNP triode U18 and pin 3 of an emitter of an NPN triode U23, the other ends of the diode U22, the diode U53 and the capacitor C25 are grounded, pin 2 of the mos field effect tube M2 is connected with a power supply VCC, pin 1 is connected with a third resistor R38, the other end of the third resistor R38 is connected with a fourth resistor R33 and the collector of the NPN triode U16, and the other end of the third resistor R38 is connected with the power supply VCC; the emitter of the NPN triode U16 is grounded, the base of the NPN triode U16 is connected with a fifth resistor R37, the other end of the fifth resistor R37 is connected with the ports of a sixth resistor R39 and a 1 wire pu 2, the emitter of the PNP triode U18 is connected with a seventh resistor R44 with 27 ohms, the other end of the seventh resistor R44 is connected with a power supply VCC with 5V, the base of the PNP triode U18 is connected with an eighth resistor R47, the other end of the eighth resistor R47 is connected with the ninth resistor R45 and the port of 1_w _uout _2, the other end of the ninth resistor R45 is connected with a power supply VCC, the emitter of the NPN triode U23 is grounded, the base of the NPN triode U23 is connected with the tenth resistor R50, the other end of the tenth resistor R50 is connected with the ports of the eleventh resistor R53 and the port of 1_w _wpd 2, and the other end of the eleventh resistor R53 is grounded.
2. The long-range strong driver circuit for single bus protocol of claim 1, wherein: the voltage of the power supply VCC is 5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221564683.XU CN217739899U (en) | 2022-06-22 | 2022-06-22 | Long-distance strong driving circuit used for single bus protocol |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221564683.XU CN217739899U (en) | 2022-06-22 | 2022-06-22 | Long-distance strong driving circuit used for single bus protocol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217739899U true CN217739899U (en) | 2022-11-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221564683.XU Active CN217739899U (en) | 2022-06-22 | 2022-06-22 | Long-distance strong driving circuit used for single bus protocol |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217739899U (en) |
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2022
- 2022-06-22 CN CN202221564683.XU patent/CN217739899U/en active Active
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