CN106505986B - A kind of differential signal output circuit - Google Patents
A kind of differential signal output circuit Download PDFInfo
- Publication number
- CN106505986B CN106505986B CN201610869261.6A CN201610869261A CN106505986B CN 106505986 B CN106505986 B CN 106505986B CN 201610869261 A CN201610869261 A CN 201610869261A CN 106505986 B CN106505986 B CN 106505986B
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- CN
- China
- Prior art keywords
- triode
- emitter
- bandgap grading
- base stage
- power module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0175—Coupling arrangements; Interface arrangements
- H03K19/017545—Coupling arrangements; Impedance matching circuits
Abstract
The present invention provides a kind of differential signal output circuit, including the first triode, second triode, third transistor, the emitter-base bandgap grading of the collector of first triode and the second triode is all connected with power module, the base stage of second triode connects the base stage of the first triode, the base stage that the collector of third transistor is connected to the second triode connects between the base stage of the first triode, the emitter-base bandgap grading of third transistor connects power module, the base stage of third transistor receives the signal of input, the collector of the emitter-base bandgap grading of second triode and the first triode exports two paths of differential signals, simultaneously, the emitter-base bandgap grading of second triode connects power module by first resistor, the collector of first triode connects power module by second resistance.Differential signal output circuit of the invention carries out difference output by signal of three triodes to input, more stable than carrying out difference output using transformer, and signal noise is few, and interference is few.
Description
Technical field
The present invention relates in a kind of differential signal output circuit more particularly to a kind of pair of electronic spark advance device in advance after song
The differential signal output circuit of shaft position signal progress difference output.
Background technique
Crankshaft analog signal after microprocessor output in advance, needs to be converted into differential signal output, and original machine ECU could know
The not signal, electronic spark advance device used is the output that differential signal is realized using transformer, transformer work currently on the market
When generate electromagnetic interference, influence the stability of system, while the signal noise exported is more, reduces the reliability of system.
Summary of the invention
The technical problem to be solved in the present invention is that provide it is a kind of by analog quantity in advance after crankshaft-position signal difference
It exports and interferes less, the differential signal output circuit that system is stable, it is of the existing technology to solve the problems, such as.
The invention adopts the following technical scheme:
A kind of differential signal output circuit, including the first triode Q1, the second triode Q2, third transistor Q3, first
The emitter-base bandgap grading of the collector of triode Q1 and the second triode Q2 are all connected with power module, the base stage connection first of the second triode Q2
The base stage of triode Q1, the base stage that the collector of third transistor Q3 is connected to the second triode Q2 connect the first triode Q1's
Between base stage, the emitter-base bandgap grading connection power module of third transistor Q3, the signal of the base stage reception input of third transistor Q3, second
The collector of the emitter-base bandgap grading of triode Q2 and the first triode Q1 export two paths of differential signals, meanwhile, the emitter-base bandgap grading of the second triode Q2
By first resistor R1 connection power module, the collector of the first triode Q1 passes through second resistance R2 connection power module.
After the base stage of second triode Q2 passes sequentially through the 6th resistance R6 and the 4th resistance R4, the first triode Q1's of connection
Base stage, the collector of third transistor Q3 are connected between the 6th resistance R6 and the 4th resistance R4.
It further include 3rd resistor R3, the 3rd resistor R3 is connected between the base stage and emitter-base bandgap grading of the second diode Q2.
It further include the 5th resistance R5, the 5th resistance R5 is connected between the base stage and emitter-base bandgap grading of first diode Q1.
The power module of the emitter-base bandgap grading connection of the emitter-base bandgap grading and the first triode Q1 of the second triode Q2 is negative voltage.
Beneficial effects of the present invention: differential signal output circuit of the invention by three triodes to the signal of input into
Row difference output, it is more stable than carrying out difference output using transformer, and signal noise is few, and interference is few.
Detailed description of the invention
Fig. 1 is the circuit diagram of differential signal output circuit of the invention.
Fig. 2 is to export negative voltage to the circuit diagram of differential signal output circuit.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and detailed description.
As shown in Figure 1, the present invention provides a kind of differential signal output circuit, including the first triode Q1, the second triode
The emitter-base bandgap grading of Q2, third transistor Q3, the collector of the first triode Q1 and the second triode Q2 are all connected with power module, and the two or three
The base stage of pole pipe Q2 connects the base stage of the first triode Q1, and the collector of third transistor Q3 is connected to the base of the second triode Q2
Pole connects between the base stage of the first triode Q1, and the emitter-base bandgap grading of third transistor Q3 connects power module, the base of third transistor Q3
The collector of the signal of pole reception input, the emitter-base bandgap grading of the second triode Q2 and the first triode Q1 export two paths of differential signals, together
When, for the emitter-base bandgap grading of the second triode Q2 by first resistor R1 connection power module, the collector of the first triode Q1 passes through second
Resistance R2 connection power module.
After the base stage of second triode Q2 passes sequentially through the 6th resistance R6 and the 4th resistance R4, the first triode Q1's of connection
Base stage, the collector of third transistor Q3 are connected between the 6th resistance R6 and the 4th resistance R4.
The invention also includes 3rd resistor R3,3rd resistor R3 is connected between the base stage and emitter-base bandgap grading of the second diode Q2.
The invention also includes the 5th resistance R5, the 5th resistance R5 is connected between the base stage and emitter-base bandgap grading of first diode Q1.
The present invention be applied to electronic spark advance device when, the signal of input be shift to an earlier date after simulation crankshaft-position signal, first
Triode Q1, the second triode Q2 be MMUN2211L triode, third transistor Q3 be BCR553 triode, first resistor R1,
Second resistance R2 is drop-down and pull-up resistor.When the end IN input low level, the first triode Q1, the second triode Q2, third
Triode Q3 is both turned on, and OUT+ and OUT- draw respectively to -5V and+5V(and ignore triode pressure drop), when the end IN input high level,
First triode Q1, the second triode Q2, third transistor Q3 are turned off, at this time OUT+ and OUT- output+5V and -5V respectively.
For the output for realizing differential signal, the emitter-base bandgap grading of the emitter-base bandgap grading of the second triode Q2 and the first triode Q1 need to input negative voltage.
When output difference signal, the power input of differential signal output circuit needs to realize the conversion of negative voltage, design
The LMC7600 chip of Shi Caiyong National Semiconductor realizes that positive electricity is pressed onto the conversion of negative voltage, which can be by+1.5-
Positive voltage mirror transformation between+10V is negative voltage, while there are many different usages for the chip, realize the defeated of different voltages
Out.When being applied to electronic spark advance device, since the crankshaft-position signal processing circuit of ECU has been all made of adaptive peak thresholding
Functional circuit, adaptive adjustment can be achieved in differential signal voltage in biggish voltage range, therefore uses common usage, defeated
Enter+5V, the voltage of output-the 5V, -5V of output connect the emitter-base bandgap grading of the second triode Q2 and the emitter-base bandgap grading of the first triode Q1.
What has been described above is only a preferred embodiment of the present invention, it is noted that for those skilled in the art,
Without depart from that overall concept of the invention, several changes and improvements can also be made, these also should be considered as of the invention
Protection scope.
Claims (5)
1. a kind of differential signal output circuit, it is characterised in that: including the first triode (Q1), the second triode (Q2), third
Triode (Q3), the collector of the first triode (Q1) and the emitter-base bandgap grading of the second triode (Q2) are all connected with power module；Two or three
The base stage of the base stage connection the first triode (Q1) of pole pipe (Q2), the collector of third transistor (Q3) are connected to the second triode
(Q2) between the base stage of base stage connection the first triode (Q1), the emitter-base bandgap grading of third transistor (Q3) connects power module, third
The base stage of triode (Q3) receives the signal of input, and the emitter-base bandgap grading of the second triode (Q2) and the collector of the first triode (Q1) are defeated
Two paths of differential signals out, meanwhile, the emitter-base bandgap grading of the second triode (Q2) connects power module, the one or three pole by first resistor (R1)
The collector for managing (Q1) connects power module by second resistance (R2)；
The power module that the collector with the first triode (Q1) is connect is positive voltage, the emitter-base bandgap grading with the second triode (Q2)
The power module of connection is negative voltage；The power module of the emitter-base bandgap grading connection of third transistor (Q3) is positive voltage.
2. a kind of differential signal output circuit according to claim 1, it is characterised in that: the base stage of the second triode (Q2)
After passing sequentially through the 6th resistance (R6) and the 4th resistance (R4), the base stage of the first triode (Q1), third transistor (Q3) are connected
Collector be connected between the 6th resistance (R6) and the 4th resistance (R4).
3. a kind of differential signal output circuit according to claim 1, it is characterised in that: it further include 3rd resistor (R3),
The 3rd resistor (R3) is connected between the base stage and emitter-base bandgap grading of the second diode (Q2).
4. a kind of differential signal output circuit according to claim 1, it is characterised in that: it further include the 5th resistance (R5),
5th resistance (R5) is connected between the base stage and emitter-base bandgap grading of first diode (Q1).
5. a kind of differential signal output circuit according to claim 1, it is characterised in that: second triode (Q2)
The power module of the emitter-base bandgap grading of emitter-base bandgap grading and the first triode (Q1) connection is negative voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610869261.6A CN106505986B (en) | 2016-09-30 | 2016-09-30 | A kind of differential signal output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610869261.6A CN106505986B (en) | 2016-09-30 | 2016-09-30 | A kind of differential signal output circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106505986A CN106505986A (en) | 2017-03-15 |
| CN106505986B true CN106505986B (en) | 2019-05-03 |
Family
ID=58291105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610869261.6A Expired - Fee Related CN106505986B (en) | 2016-09-30 | 2016-09-30 | A kind of differential signal output circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106505986B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201292889Y (en) * | 2008-10-31 | 2009-08-19 | 比亚迪股份有限公司 | Crankshaft signal processor |
| CN102694511A (en) * | 2012-06-07 | 2012-09-26 | 李志鹏 | Low-voltage driven integrated circuit amplifier for vehicle control circuit |
| CN102931932A (en) * | 2012-10-25 | 2013-02-13 | 中国科学院微电子研究所 | Complementary bias differential amplifier |
| CN205356278U (en) * | 2016-02-03 | 2016-06-29 | 陈志择 | MOS manages amplifier circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1918794A (en) * | 2005-04-28 | 2007-02-21 | 哉英电子股份有限公司 | Differential driving circuit and electronic equipment including the same |
-
2016
- 2016-09-30 CN CN201610869261.6A patent/CN106505986B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201292889Y (en) * | 2008-10-31 | 2009-08-19 | 比亚迪股份有限公司 | Crankshaft signal processor |
| CN102694511A (en) * | 2012-06-07 | 2012-09-26 | 李志鹏 | Low-voltage driven integrated circuit amplifier for vehicle control circuit |
| CN102931932A (en) * | 2012-10-25 | 2013-02-13 | 中国科学院微电子研究所 | Complementary bias differential amplifier |
| CN205356278U (en) * | 2016-02-03 | 2016-06-29 | 陈志择 | MOS manages amplifier circuit |
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| Publication number | Publication date |
|---|---|
| CN106505986A (en) | 2017-03-15 |
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Granted publication date: 20190503 Termination date: 20190930 |