CN105573944A - Circuit for generating strong differential digital signals through common IO port of single-chip microcomputer - Google Patents
Circuit for generating strong differential digital signals through common IO port of single-chip microcomputer Download PDFInfo
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- CN105573944A CN105573944A CN201610080217.7A CN201610080217A CN105573944A CN 105573944 A CN105573944 A CN 105573944A CN 201610080217 A CN201610080217 A CN 201610080217A CN 105573944 A CN105573944 A CN 105573944A
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- triode
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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
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
- G06F13/385—Information transfer, e.g. on bus using universal interface adapter for adaptation of a particular data processing system to different peripheral devices
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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
- G06F2213/38—Universal adapter
- G06F2213/3852—Converter between protocols
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Dc Digital Transmission (AREA)
Abstract
The invention discloses a circuit for generating strong differential digital signals through a common IO port of a single-chip microcomputer. The circuit comprises a triode Q1, a triode Q2, a triode Q3, a triode Q4, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6; after being connected with the resistor R5 in series, a signal input end A is connected with the base electrode of the triode Q4, and the emitting electrode of the triode Q4 is connected with the emitting electrode of the triode Q3 and is grounded; the collector electrode of the triode Q4 is connected with the collector electrode of the triode Q2 and a signal output end A; after being connected with the resistor R6 in series, the signal input end A is connected with the base electrode of the triode Q3; the collector electrode of the triode Q3 is connected with the collector electrode of the triode Q1 and a signal output end B; after being connected with the resistor R4 in series, the signal output end A is connected with the base electrode of the triode Q1; after being connected with the resistor R2 in series, the emitting electrode of the triode Q1 is connected with a volt current condenser (VCC); after being connected with the resistor R3 in series, the single output end B is connected with the base electrode of the triode Q2; after being connected with the resistor R1 in series, the emitting electrode of the triode Q2 is connected with the VCC. Data signals can be remotely transmitted through a common single-chip microcomputer system, and anti-interference performance is good.
Description
Technical field
The present invention relates to battery management circuit technical field, be specially a kind of circuit utilizing the common I/O port of single-chip microcomputer to produce strong differential digital signal.
Background technology
Common single-chip microcomputer is all with Transistor-Transistor Logic level transmission of digital signals, and common TTL Signal transmissions does jamming performance difference, and communication distance is short.Differential signal interference free performance is stronger, the CAN communication of current industrial 485 conventional communications and automobile is all adopt differential signal, the single-chip microcomputer of industrial employing needs usually by connecting extra special CAN communication or 485 communication chips carry out communication, and such cost is higher.
Summary of the invention
In order to overcome the shortcoming that prior art is mentioned, the invention provides a kind of circuit utilizing the common I/O port of single-chip microcomputer to produce strong differential digital signal.
The technical solution adopted for the present invention to solve the technical problems is: a kind of circuit utilizing the common I/O port of single-chip microcomputer to produce strong differential digital signal, it is characterized in that, comprise triode Q1, triode Q2, triode Q3, triode Q4, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5 and resistance R6, the base stage of triode Q4 is connect after signal input part A+ resistance in series R5, the emitter of the emitter connecting triode Q3 of triode Q4 ground connection, the collector of triode Q4 meets collector and the signal output part A of triode Q2 respectively, the base stage of triode Q3 is connect after signal input part A-resistance in series R6, the collector of triode Q3 meets collector and the signal output part B of triode Q1 respectively, signal output part A connects the base stage of triode Q1 after being connected in series resistance R4, power supply VCC is met after the emitter resistance in series R2 of triode Q1, the base stage of triode Q2 is connect after signal output part B resistance in series R3, power supply VCC is met after the emitter resistance in series R1 of triode Q2.
Wherein, triode Q1, triode Q2 can be common PNP triode also can be P channel MOS tube, and triode Q3, triode Q4 can be common PNP triode also can be N-channel MOS pipe; Resistance R1, resistance R2 adopt adjustable resistance, the transmitted power of the watt level Circuit tuning of visual external circuits; The parameter of visual triode Q1, triode Q2, triode Q3, triode Q4 of selecting of resistance R3, resistance R4, resistance R5, resistance R6 is specifically chosen.
The invention has the beneficial effects as follows: this circuit is simple, line is convenient; Utilize a low cost circuit to convert ordinary numbers TTL signal to CAN communication data layout, solving common Single Chip Microcomputer (SCM) system cannot the problem of distance data transmission signal and poor anti-interference.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention;
Fig. 2 is the waveform input signal figure of circuit input end (A+, A-) of the present invention;
Fig. 3 is the signal output waveform figure of circuit output end (A, B) of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further detailed.
As shown in Figure 1, a kind of circuit utilizing the common I/O port of single-chip microcomputer to produce strong differential digital signal, comprise triode Q1, triode Q2, triode Q3, triode Q4, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5 and resistance R6, the base stage of triode Q4 is connect after signal input part A+ resistance in series R5, the emitter of the emitter connecting triode Q3 of triode Q4 ground connection, the collector of triode Q4 meets collector and the signal output part A of triode Q2 respectively, the base stage of triode Q3 is connect after signal input part A-resistance in series R6, the collector of triode Q3 meets collector and the signal output part B of triode Q1 respectively, signal output part A connects the base stage of triode Q1 after being connected in series resistance R4, power supply VCC is met after the emitter resistance in series R2 of triode Q1, the base stage of triode Q2 is connect after signal output part B resistance in series R3, power supply VCC is met after the emitter resistance in series R1 of triode Q2.
Wherein, triode Q1, triode Q2 can be common PNP triode also can be P channel MOS tube, and triode Q3, triode Q4 can be common PNP triode also can be N-channel MOS pipe; Resistance R1, resistance R2 adopt adjustable resistance, the transmitted power of the watt level Circuit tuning of visual external circuits; The parameter of visual triode Q1, triode Q2, triode Q3, triode Q4 of selecting of resistance R3, resistance R4, resistance R5, resistance R6 is specifically chosen.
As shown in Figures 2 and 3, circuit working process is as follows:
11, when input end no signal inputs, input is all low, triode Q3, triode Q4 not conducting, and exporting A, B is high-impedance state, and export without differential signal, circuit power consumption is minimum.When input end A+ is high, when A-is low, triode Q2, triode Q3 not conducting, triode Q1, triode Q4 conducting, because resistance R3 and B is connected, so triode Q2 not conducting, and A output terminal is logical zero, resistance R4 connects with triode Q1, so triode Q1 conducting is so there is power supply VCC between AB; Phase differential due to A+ and A-is 180 degree, next cycle of signal, and when input end A+ is logical zero, A-is VCC, and in like manner, triode Q2, triode Q3 conducting, triode Q1, triode Q4 not conducting, the potential between AB is-VCC.Differential signal is made up of A and B two differential signals, is AC signal.This patent describes the course of work for CAN or 485 signals.
2, in recessive state, the level of CANH and CANL is together biased to 0V, so the differential voltage of two lines is 0V, represents logical one.
3, at dominance condition, A level can be elevated to about 5V, CANL level can be reduced to about-5V, so the differential voltage of two lines is 10V, represents logical zero.The present invention uses two I/O mouths of single-chip microcomputer to the difference AC signal transacting after the conversion of TTL data circuit.
As described above, be only preferred embodiment of the present invention, when not limiting scope of the invention process with this, the simple equivalence namely generally done according to the present patent application the scope of the claims and invention description content changes and modifies, and all still remains within the scope of the patent.
Claims (4)
1. the circuit utilizing the common I/O port of single-chip microcomputer to produce strong differential digital signal, it is characterized in that, comprise triode Q1, triode Q2, triode Q3, triode Q4, resistance R1, resistance R2, resistance R3, resistance R4, resistance R5 and resistance R6, the base stage of triode Q4 is connect after signal input part A+ resistance in series R5, the emitter of the emitter connecting triode Q3 of triode Q4 ground connection, the collector of triode Q4 meets collector and the signal output part A of triode Q2 respectively, the base stage of triode Q3 is connect after signal input part A-resistance in series R6, the collector of triode Q3 meets collector and the signal output part B of triode Q1 respectively, signal output part A connects the base stage of triode Q1 after being connected in series resistance R4, power supply VCC is met after the emitter resistance in series R2 of triode Q1, the base stage of triode Q2 is connect after signal output part B resistance in series R3, power supply VCC is met after the emitter resistance in series R1 of triode Q2.
2. a kind of circuit utilizing the common I/O port of single-chip microcomputer to produce strong differential digital signal according to claim 1, it is characterized in that, described triode Q1 and triode Q2 is PNP triode or P channel MOS tube.
3. a kind of circuit utilizing the common I/O port of single-chip microcomputer to produce strong differential digital signal according to claim 1, it is characterized in that, described triode Q3 and triode Q4 is PNP triode or N-channel MOS pipe.
4. a kind of circuit utilizing the common I/O port of single-chip microcomputer to produce strong differential digital signal according to claim 1, is characterized in that, described resistance R1 and resistance R2 adopts adjustable resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610080217.7A CN105573944A (en) | 2016-02-04 | 2016-02-04 | Circuit for generating strong differential digital signals through common IO port of single-chip microcomputer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610080217.7A CN105573944A (en) | 2016-02-04 | 2016-02-04 | Circuit for generating strong differential digital signals through common IO port of single-chip microcomputer |
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| Publication Number | Publication Date |
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| CN105573944A true CN105573944A (en) | 2016-05-11 |
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| CN201610080217.7A Pending CN105573944A (en) | 2016-02-04 | 2016-02-04 | Circuit for generating strong differential digital signals through common IO port of single-chip microcomputer |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0161627B1 (en) * | 1984-05-16 | 1989-11-29 | Siemens Aktiengesellschaft | Bipolar amplifier circuit |
| CN101689849A (en) * | 2007-06-26 | 2010-03-31 | 高通股份有限公司 | Level shifter having low duty cycle distortion |
| US20140112053A1 (en) * | 2012-10-24 | 2014-04-24 | YongSik Youn | Write driver in sense amplifier for resistive type memory |
| CN205563542U (en) * | 2016-02-04 | 2016-09-07 | 惠州市蓝微新源技术有限公司 | Utilize ordinary IO mouth of singlechip to produce strong difference data signal's circuit |
-
2016
- 2016-02-04 CN CN201610080217.7A patent/CN105573944A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0161627B1 (en) * | 1984-05-16 | 1989-11-29 | Siemens Aktiengesellschaft | Bipolar amplifier circuit |
| CN101689849A (en) * | 2007-06-26 | 2010-03-31 | 高通股份有限公司 | Level shifter having low duty cycle distortion |
| US20140112053A1 (en) * | 2012-10-24 | 2014-04-24 | YongSik Youn | Write driver in sense amplifier for resistive type memory |
| CN103778960A (en) * | 2012-10-24 | 2014-05-07 | 三星电子株式会社 | Write driver in sense amplifier for resistive type memory |
| CN205563542U (en) * | 2016-02-04 | 2016-09-07 | 惠州市蓝微新源技术有限公司 | Utilize ordinary IO mouth of singlechip to produce strong difference data signal's circuit |
Non-Patent Citations (4)
| Title |
|---|
| BO-JYUN KUO ETC.: "《VLSI Design, Automation and Test (VLSI-DAT), 2015 International Symposium on》", 29 April 2015, VLSI DESIGN, AUTOMATION AND TEST (VLSI-DAT), 2015 INTERNATIONAL SYMPOSIUM ON * |
| 刘莹等: "交叉耦合绝热动态触发器及同步动态时序电路", 《电路与系统学报》 * |
| 晋孝峰等: "CMOS图像传感器的硬复位电路研究", 《电子学报》 * |
| 裴晓敏: "适用于SAR ADC的CMOS比较器的设计", 《电子设计应用》 * |
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Application publication date: 20160511 |