CN105404603A - Anti-interference driving circuit of USB interface - Google Patents
Anti-interference driving circuit of USB interface Download PDFInfo
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- CN105404603A CN105404603A CN201510702614.9A CN201510702614A CN105404603A CN 105404603 A CN105404603 A CN 105404603A CN 201510702614 A CN201510702614 A CN 201510702614A CN 105404603 A CN105404603 A CN 105404603A
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- data line
- usb interface
- counnter attack
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/40—Bus structure
- G06F13/4063—Device-to-bus coupling
- G06F13/4068—Electrical coupling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0042—Universal serial bus [USB]
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- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
The invention discloses an anti-interference driving circuit of a USB interface. The anti-interference driving circuit is capable of enabling the USB interface to be applied to industrial environments. The anti-interference driving circuit comprises the USB interface, wherein the USB interface is provided with a power pin, positive and negative electrodes of a data line, a device type detection pin and a ground pin; the power pin of the USB interface is connected with a power electrostatic discharge circuit, an anti-reverse front filter circuit, an anti-reverse circuit and an anti-reverse back filter circuit; the positive electrode of the data line of the USB interface is connected with a negative data electrostatic discharge circuit, a negative data signal attenuator circuit and a negative data signal filter circuit; the positive electrode of the data line of the USB interface is connected with a positive data electrostatic discharge circuit, a positive data signal attenuator circuit, a positive data signal filter circuit and a high-speed communication enable and disable circuit; and the device type detection pin of the USB interface is connected with a detection signal attenuator circuit and a detection signal clamper and filter circuit. The USB interface adopting the anti-interference driving circuit can be widely applied to various industrial environments.
Description
Technical field
The present invention relates to a kind of driving circuit of communication interface, refer more particularly to a kind of driving circuit of usb communication interface.
Background technology
Along with the fast development of society electronic technology, the application of microprocessor is more and more extensive, all microprocessor is embedded in interface, make the function of interface more and more abundanter, and, also occurred many novel communication interfaces, wherein, USB interface had become one of general now communication interface already.But, when applying it to industrial environment, due to well-known reasons such as the power-supply fluctuation under industrial environment are large, electromagnetic radiation is large, undesired signal is many, conventional USB interface cannot reliablely and stablely work, especially, when high speed transmission data, this phenomenon is particularly evident.
Summary of the invention
Technical matters to be solved by this invention is: provide a kind of USB interface making USB interface be applied to industrial environment anti-interference driving circuit.
For solving the problems of the technologies described above, the technical solution used in the present invention is: the anti-interference driving circuit of a kind of USB interface, comprise: USB interface, USB interface is provided with supply pin, a pair data pin and data line positive pole and data line negative pole, device type detects pin and grounding leg, the grounding leg ground connection of USB interface, the supply pin of described USB interface is connected with by power bus: power supply static release circuit, filtering circuit and anti-circnit NOT and counnter attack post filtering circuit before counnter attack, wherein, anti-circnit NOT is serially connected in power bus, power bus to be cut off into before counnter attack power bus after power bus and counnter attack, before described power supply static release circuit and counnter attack, filtering circuit to be attempted by before counnter attack between power bus and ground wire, described counnter attack post filtering circuit to be attempted by after counnter attack between power bus and ground wire, before counnter attack, filtering circuit comprises: low-frequency filter circuit before high-frequency filter circuit and counnter attack before counnter attack, described counnter attack post filtering circuit comprises: low-frequency filter circuit after high-frequency filter circuit and counnter attack after counnter attack, the data line negative pole of described USB interface is connected with by negative data line: negative data static release circuit, negative data signal attenuation circuit and negative data signal filter circuit, wherein, negative data signal attenuation circuit is serially connected in negative data line, negative data line and rear negative data line of decaying before negative data line being cut off into decay, it is front between negative data line and ground wire that described negative data static release circuit is attempted by decay, and it is rear between negative data line and ground wire that described negative data signal filter circuit is attempted by decay, the data line positive pole of described USB interface is connected with by correction data line: correction data static release circuit, positive data signal attenuator circuit, positive data signal filtering circuit and high-speed communication switching on/off circuit, wherein, positive data signal attenuator circuit is serially connected in correction data line, correction data line and rear correction data line of decaying before correction data line being cut off into decay, it is front between correction data line and ground wire that described correction data static release circuit is attempted by decay, and it is rear between correction data line and ground wire that described positive data signal filtering circuit and high-speed communication switching on/off circuit are attempted by decay, described positive and negative data-signal filtering circuit is high-frequency filter circuit, described high-speed communication switching on/off circuit includes: the first pull down resistor, the second pull down resistor and start and stop driving circuit, first pull down resistor is connected with one end of the second pull down resistor, the other end of the first pull down resistor is connected to the rear correction data line of decay, the other end ground connection of the second pull down resistor, first pull down resistor is connected with the positive pole of working power by a controllable electronic switch with the junction of the second pull down resistor, and the control end of this controllable electronic switch is connected with described start and stop driving circuit, the device type of described USB interface is detected on pin and is connected with by equipment Inspection line: detection signal attenuator circuit, detection signal clamper and filtering circuit.
As a kind of preferred version, in the anti-interference driving circuit of described USB interface, described controllable electronic switch is PNP type triode, and the collector of this triode is connected with the positive pole of working power, and the emitter of triode is connected with the junction of the first pull down resistor with the second pull down resistor; Correspond, described start and stop driving circuit comprises: start and stop drive spacing resistance and start and stop to drive pull-up resistor, start and stop drive one end of pull-up resistor to be connected with the positive pole of working power, start and stop drive the other end of pull-up resistor to be connected with the base stage of described triode, start and stop drive one end of spacing resistance to be connected with the base stage of described triode, and the other end is connected with the start and stop drive level for controlling described triode break-make.
As a kind of preferred version, in the anti-interference driving circuit of described USB interface, described detection signal clamper and filtering circuit comprise: above detect divider resistance and lower detection divider resistance, upper detection divider resistance is connected as device type check point with one end of lower detection divider resistance, the other end of lower detection divider resistance detects pin with the device type of described USB interface and is connected, the upper other end of detection divider resistance is connected with the positive pole of working power, and described device type check point is by a clamper and filter capacitor ground connection.
As a kind of preferred version, in the anti-interference driving circuit of described USB interface, described anti-circnit NOT comprises: P channel MOS tube, the grounded-grid of P channel MOS tube, the source electrode of P channel MOS tube is connected with power bus before counnter attack, and the drain electrode of P channel MOS tube is connected with power bus after counnter attack.
As a kind of preferred version, in the anti-interference driving circuit of described USB interface, described power supply static release circuit is two-way Transient Suppression Diode, and one end of two-way Transient Suppression Diode is connected with the supply pin of described USB interface, other end ground connection.
As a kind of preferred version, in the anti-interference driving circuit of described USB interface, described is made up of two-way Transient Suppression Diode array with a pair data static release circuit that the data line positive pole of USB interface is connected with data line negative pole, the two-way supply pin of Transient Suppression Diode array is connected with the positive pole of working power, the grounding leg ground connection of this two-way Transient Suppression Diode array, a pair output pin of this two-way Transient Suppression Diode array is connected with data line negative pole with the data line positive pole of described USB interface respectively.
The invention has the beneficial effects as follows: the application scenario of USB interface widened greatly by anti-interference driving circuit of the present invention, it reliablely and stablely can be worked under, electromagnetic radiation is large, undesired signal is many industrial environment large in power-supply fluctuation; Especially the introducing of high-speed communication switching on/off circuit, both ensure that the stability of the waveform when low speed transmissions data, had substantially improved again waveform during high speed transmission data, thus significantly improve the accuracy rate of data transmission.
Accompanying drawing explanation
Fig. 1 is electric theory structure block diagram of the present invention.
Fig. 2 is the electric principle assumption diagram corresponding with Fig. 1.
Reference numeral in Fig. 1 is respectively: 1, USB interface, 11, power supply static release circuit, 12, filtering circuit before counnter attack, 13, anti-circnit NOT, 14, counnter attack post filtering circuit, 21, negative data static release circuit, 22, negative data signal attenuation circuit, 23, negative data signal filter circuit, 31, correction data static release circuit, 32, positive data signal attenuator circuit, 33, positive data signal filtering circuit, 34, high-speed communication switching on/off circuit, 41, detection signal attenuator circuit, 42, detection signal clamper and filtering circuit.
Embodiment
Below in conjunction with accompanying drawing, describe the specific embodiments of the anti-interference driving circuit of a kind of USB interface of the present invention in detail:
As shown in Figure 1, the anti-interference driving circuit of a kind of USB interface of the present invention, comprise: usb 1, usb 1 is provided with supply pin (1 pin), a pair data pin and data line positive pole (3 pin) and data line negative pole (2 pin), device type detects pin (4 pin) and grounding leg (5 pin), the supply pin of described usb 1 is connected with by power bus: power supply static release circuit 11, filtering circuit 12 and anti-circnit NOT 13 and counnter attack post filtering circuit 14 before counnter attack, wherein, anti-circnit NOT 13 is serially connected in power bus, power bus to be cut off into before counnter attack power bus after power bus and counnter attack, before described power supply static release circuit 11 and counnter attack, filtering circuit 12 to be attempted by before counnter attack between power bus and ground wire, described counnter attack post filtering circuit 14 to be attempted by after counnter attack between power bus and ground wire, before described counnter attack, filtering circuit includes: low-frequency filter circuit before high-frequency filter circuit and counnter attack before counnter attack, described counnter attack post filtering circuit includes: low-frequency filter circuit after high-frequency filter circuit and counnter attack after counnter attack, as shown in Figure 2, the two-way Transient Suppression Diode D1 of described power supply static release circuit 11 to be a model be SMBJ5.0CA, this two-way one end of Transient Suppression Diode D1 is connected with the supply pin of usb 1, other end ground connection, before described counnter attack, filtering circuit comprises: low-frequency filter circuit before the counnter attack that before the counnter attack that the polarity free capacitor C2 being 0.1UF by capacity is formed, high-frequency filter circuit and the electrochemical capacitor C3 that is 10UF by capacity are formed, described counnter attack post filtering circuit comprises: low-frequency filter circuit after the counnter attack that after the counnter attack that the polarity free capacitor C1 being 0.1UF by capacity is formed, high-frequency filter circuit and the electrochemical capacitor C4 that is 10UF by capacity are formed, described anti-circnit NOT comprises: model is the P channel MOS tube Q1 of SI2371EDS, the grounded-grid of this P channel MOS tube Q1, the source electrode of P channel MOS tube Q1 is connected with power bus before counnter attack, the drain electrode of P channel MOS tube Q1 is connected with power bus after counnter attack, the data line negative pole (2 pin) of described usb 1 is connected with by negative data line: negative data static release circuit 21, negative data signal attenuation circuit 22 and negative data signal filter circuit 23, wherein, negative data signal attenuation circuit 22 is serially connected in negative data line, negative data line and rear negative data line of decaying before negative data line being cut off into decay, it is front between negative data line and ground wire that described negative data static release circuit 21 is attempted by decay, and it is rear between negative data line and ground wire that described negative data signal filter circuit 23 is attempted by decay, the data line positive pole (3 pin) of described usb 1 is connected with by correction data line: correction data static release circuit 31, positive data signal attenuator circuit 32, positive data signal filtering circuit 33 and high-speed communication switching on/off circuit 34, wherein, positive data signal attenuator circuit 32 is serially connected in correction data line, correction data line and rear correction data line of decaying before correction data line being cut off into decay, it is front between correction data line and ground wire that correction data static release circuit 31 is attempted by decay, it is rear between correction data line and ground wire that described positive data signal filtering circuit 33 and high-speed communication switching on/off circuit 34 are attempted by decay, as shown in Figure 2, described positive and negative data-signal filtering circuit is high-frequency filter circuit, be made up of polarity free capacitor C5 and C6 of 22PF respectively, that is: positive data signal filtering circuit is made up of polarity free capacitor C5, and negative data signal filter circuit is made up of polarity free capacitor C6, the two-way Transient Suppression Diode battle array IC1 that described correction data static release circuit 31 and negative data static release circuit 21 are NUP2202W1 by model arranges and forms, the supply pin (5 pin) of this two-way Transient Suppression Diode array IC1 is connected with the positive pole of working power, grounding leg (2 pin) ground connection of this two-way Transient Suppression Diode array IC1, a pair output pin (6 pin and 1 pin) of this two-way Transient Suppression Diode array IC1 is connected with data line negative pole with the data line positive pole of described usb 1 respectively, described positive data signal attenuator circuit 32 is made up of the resistance R12 of 20 Europe mothers, and described negative data signal attenuation circuit 22 is made up of the resistance R9 of 20 Europe mothers, described high-speed communication switching on/off circuit 34 includes: resistance is the first pull down resistor R2 of 1K, resistance is the second pull down resistor R6 and the start and stop driving circuit of 10K, first pull down resistor R2 is connected with one end of the second pull down resistor R6, the other end of the first pull down resistor R2 is connected to the rear correction data line of decay, the other end ground connection of the second pull down resistor R6, the junction of the first pull down resistor R2 and the second pull down resistor R6 is that the collector and emitter of the triode Q2 (PNP type triode) of 9012 is connected with the positive pole of working power by a model as controllable electronic switch, the base stage of triode Q2 is connected with described start and stop driving circuit, described start and stop driving circuit comprises: start and stop drive spacing resistance R5 and start and stop to drive pull-up resistor R4, start and stop drive one end of pull-up resistor R4 to be connected with the positive pole of working power, start and stop drive the other end of pull-up resistor R4 to be connected with the base stage of triode Q2, start and stop drive one end of spacing resistance R5 to be connected with the base stage of triode Q2, start and stop drive the other end of spacing resistance R5 to be connected with the start and stop drive level for controlling triode Q2 break-make, the device type of described usb 1 is detected on pin (5 pin) and is connected with by equipment Inspection line: detection signal attenuator circuit, detection signal clamper and filtering circuit, as shown in Figure 2, this detection signal clamper and filtering circuit comprise: above detect divider resistance R1 and lower detection divider resistance R3, upper detection divider resistance R1 is connected as device type check point with one end of lower detection divider resistance R3, the lower other end of detection divider resistance R3 and the device type of described usb 1 detect pin (4 pin) and are connected, the other end of upper detection divider resistance R1 is connected with the positive pole of working power, and described device type check point is the polarity free capacitor C7 ground connection of 0.1UF by a capacity as clamper and filter capacitor.
In sum, be only preferred embodiment of the present invention, not be used for limiting scope of the invention process, all equalizations done according to shape, structure, feature and the spirit described in the claims in the present invention scope change and modify, and all should be included in right of the present invention.
Claims (6)
1. the anti-interference driving circuit of USB interface, comprise: USB interface, USB interface is provided with supply pin, a pair data pin and data line positive pole and data line negative pole, device type detects pin and grounding leg, the grounding leg ground connection of USB interface, it is characterized in that, the supply pin of described USB interface is connected with by power bus: power supply static release circuit, filtering circuit and anti-circnit NOT and counnter attack post filtering circuit before counnter attack, wherein, anti-circnit NOT is serially connected in power bus, power bus to be cut off into before counnter attack power bus after power bus and counnter attack, before described power supply static release circuit and counnter attack, filtering circuit to be attempted by before counnter attack between power bus and ground wire, described counnter attack post filtering circuit to be attempted by after counnter attack between power bus and ground wire, before counnter attack, filtering circuit comprises: low-frequency filter circuit before high-frequency filter circuit and counnter attack before counnter attack, described counnter attack post filtering circuit comprises: low-frequency filter circuit after high-frequency filter circuit and counnter attack after counnter attack, the data line negative pole of described USB interface is connected with by negative data line: negative data static release circuit, negative data signal attenuation circuit and negative data signal filter circuit, wherein, negative data signal attenuation circuit is serially connected in negative data line, negative data line and rear negative data line of decaying before negative data line being cut off into decay, it is front between negative data line and ground wire that described negative data static release circuit is attempted by decay, and it is rear between negative data line and ground wire that described negative data signal filter circuit is attempted by decay, the data line positive pole of described USB interface is connected with by correction data line: correction data static release circuit, positive data signal attenuator circuit, positive data signal filtering circuit and high-speed communication switching on/off circuit, wherein, positive data signal attenuator circuit is serially connected in correction data line, correction data line and rear correction data line of decaying before correction data line being cut off into decay, it is front between correction data line and ground wire that described correction data static release circuit is attempted by decay, and it is rear between correction data line and ground wire that described positive data signal filtering circuit and high-speed communication switching on/off circuit are attempted by decay, described positive and negative data-signal filtering circuit is high-frequency filter circuit, described high-speed communication switching on/off circuit includes: the first pull down resistor, the second pull down resistor and start and stop driving circuit, first pull down resistor is connected with one end of the second pull down resistor, the other end of the first pull down resistor is connected to the rear correction data line of decay, the other end ground connection of the second pull down resistor, first pull down resistor is connected with the positive pole of working power by a controllable electronic switch with the junction of the second pull down resistor, and the control end of this controllable electronic switch is connected with described start and stop driving circuit, the device type of described USB interface is detected on pin and is connected with by equipment Inspection line: detection signal attenuator circuit, detection signal clamper and filtering circuit.
2. the anti-interference driving circuit of USB interface as claimed in claim 1, it is characterized in that: described controllable electronic switch is PNP type triode, the collector of this triode is connected with the positive pole of working power, and the emitter of triode is connected with the junction of the first pull down resistor with the second pull down resistor; Correspond, described start and stop driving circuit comprises: start and stop drive spacing resistance and start and stop to drive pull-up resistor, start and stop drive one end of pull-up resistor to be connected with the positive pole of working power, start and stop drive the other end of pull-up resistor to be connected with the base stage of described triode, start and stop drive one end of spacing resistance to be connected with the base stage of described triode, and the other end is connected with the start and stop drive level for controlling described triode break-make.
3. the anti-interference driving circuit of USB interface as claimed in claim 1, it is characterized in that: described detection signal clamper and filtering circuit comprise: above detect divider resistance and lower detection divider resistance, upper detection divider resistance is connected as device type check point with one end of lower detection divider resistance, the other end of lower detection divider resistance detects pin with the device type of described USB interface and is connected, the upper other end of detection divider resistance is connected with the positive pole of working power, and described device type check point is by a clamper and filter capacitor ground connection.
4. the anti-interference driving circuit of USB interface as claimed in claim 1, it is characterized in that: described anti-circnit NOT comprises: P channel MOS tube, the grounded-grid of P channel MOS tube, the source electrode of P channel MOS tube is connected with power bus before counnter attack, and the drain electrode of P channel MOS tube is connected with power bus after counnter attack.
5. the anti-interference driving circuit of the USB interface according to any one of Claims 1-4, it is characterized in that: described power supply static release circuit is two-way Transient Suppression Diode, one end of two-way Transient Suppression Diode is connected with the supply pin of described USB interface, other end ground connection.
6. the anti-interference driving circuit of the USB interface according to any one of Claims 1-4, it is characterized in that: described is made up of two-way Transient Suppression Diode array with a pair data static release circuit that the data line positive pole of USB interface is connected with data line negative pole, this two-way supply pin of Transient Suppression Diode array is connected with the positive pole of working power, the grounding leg ground connection of this two-way Transient Suppression Diode array, a pair output pin of this two-way Transient Suppression Diode array is connected with data line negative pole with the data line positive pole of described USB interface respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510702614.9A CN105404603B (en) | 2015-10-26 | 2015-10-26 | A kind of anti-interference driving circuit of USB interface |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510702614.9A CN105404603B (en) | 2015-10-26 | 2015-10-26 | A kind of anti-interference driving circuit of USB interface |
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| CN105404603A true CN105404603A (en) | 2016-03-16 |
| CN105404603B CN105404603B (en) | 2018-10-09 |
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| CN108183605A (en) * | 2018-01-02 | 2018-06-19 | 深圳市智行畅联科技有限公司 | A kind of anti-conductive interference circuit for vehicle-mounted primary source |
| CN110825682A (en) * | 2019-11-05 | 2020-02-21 | 维沃移动通信有限公司 | USB control method and electronic equipment |
| CN111159068A (en) * | 2019-12-30 | 2020-05-15 | 联想(北京)有限公司 | Information processing method and electronic device |
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| CN111159068A (en) * | 2019-12-30 | 2020-05-15 | 联想(北京)有限公司 | Information processing method and electronic device |
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| Publication number | Publication date |
|---|---|
| CN105404603B (en) | 2018-10-09 |
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