CN209184572U - A kind of triangular signal generation circuit - Google Patents
A kind of triangular signal generation circuit Download PDFInfo
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- CN209184572U CN209184572U CN201822154929.6U CN201822154929U CN209184572U CN 209184572 U CN209184572 U CN 209184572U CN 201822154929 U CN201822154929 U CN 201822154929U CN 209184572 U CN209184572 U CN 209184572U
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Abstract
The utility model discloses a kind of triangular signals, and circuit occurs, and belongs to electronic circuit field.The circuit includes DC power supply, capacitor, 555 chips, diode, triode and resistance；The connection of the base stage of first triode and the second triode, third transistor are connected with the base stage of the 4th triode；555 chips are connect by diode with the first triode, third transistor, and capacity earth is passed through；5th triode is connect with the second triode, the 4th triode；The emitter of 5th triode passes through resistance eutral grounding；First triode, the second triode, the 5th triode are connect with 555 chips, and DC power supply is connect with 555 chips, triode；The output end of the transmitting extremely triangle wave generating circuit of 5th triode；There is certain non-linear, problem for causing the triangular signal linearity generated not high in the charge and discharge process for solving capacitor in RC integrating circuit；The linearity for improving the triangular signal generated is achieved the effect that.
Description
Technical field
The utility model embodiment is related to electronic circuit field, in particular to circuit occurs for a kind of triangular signal.
Background technique
Triangular signal is that circuit evolving square-wave signal occurs using square wave, is obtained after square-wave signal is inputted RC integrating circuit
It arrives.Currently in order to the triangular signal for obtaining high linearity is needed using two or more integrated operational amplifier.In addition, RC
There is centainly non-linear in the charge and discharge of the capacitor in integrating circuit, cause the triangular signal linearity generated not high.
Utility model content
In order to solve problems in the prior art, the utility model embodiment provides a kind of triangular signal generation circuit.
The technical solution is as follows:
In a first aspect, providing a kind of triangular signal generation circuit, which is characterized in that including DC power supply, electricity
Appearance, 555 chips, 4 diodes, 5 triodes and 2 resistance；
The anode of 4th pin of 555 chips and the 8th pin connection DC power supply, the 2nd pin of 555 chips and the 6th
By capacity earth after pin connection, the 3rd pin of 555 chips and the cathode of third diode, the positive of the 4th diode connect
It connects；
The cathode of the base stage of 5th triode and first diode, the second diode anode connect, the 5th triode, the
The common end of one diode and the second diode is connect with the 6th pin of 555 chips；
The collector of first triode is connect with the anode of the anode of third diode, first diode；
The collector of third transistor is connect with the cathode of the cathode of the second diode, the 4th diode；
The base stage of first triode is connect with the base stage of the second triode, the common end of the first triode and the second triode
It is connect with one end of first resistor；
The base stage of third transistor is connect with the base stage of the 4th triode, the common end of third transistor and the 4th triode
It is connect with the other end of first resistor；
The emitter ground connection of the emitter of third transistor, the 4th triode；
The collector of the emitter of first triode, the emitter of the second triode and the 5th triode connects direct current supply
The cathode of power supply；
The emitter of 5th triode is grounded by second resistance, the emitter of the 5th triode and second resistance it is public
End is the output end of triangle wave generating circuit.
Optionally, the first triode, the second triode, the 5th triode are PNP type triode；
Third transistor and the 4th triode are NPN type triode.
Optionally, 4 diodes are fast recovery diode.
Technical solution provided by the embodiment of the utility model has the benefit that
Triangular signal provided by the embodiment of the utility model occurs to utilize the first triode Q1 of positive-negative-positive and the in circuit
Two triode Q2 constitute constant-current source, realize linear-charging to capacitor C1, utilize the third transistor Q3 and the 4th triode of NPN type
Q4 constitutes constant-current source, realizes linear discharge to capacitor C1, and the charge and discharge process for solving capacitor in RC integrating circuit exists centainly
It is non-linear, lead to the not high problem of the triangular signal linearity generated；The line for improving the triangular signal generated is reached
The effect of property degree.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the circuit structure diagram that circuit occurs for a kind of triangular signal shown according to an exemplary embodiment.
Specific embodiment
It is practical new to this below in conjunction with attached drawing to keep the purpose of this utility model, technical solution and advantage clearer
Type embodiment is described in further detail.
Referring to FIG. 1, it illustrates the circuits that circuit occurs for the triangular signal that the utility model one embodiment provides
Structure chart.
Triangular signal occur circuit include DC power supply BAT1, capacitor C1,555 chip U1, first diode D1,
Second diode D2, third diode D3, the 4th diode D4, the first triode Q1, the second triode Q2, third transistor
Q3, the 4th triode Q4, the 5th triode Q5, first resistor R1, second resistance R2.
The base stage of first triode Q1 is connect with the base stage of the second triode Q2, the emitter and second of the first triode Q1
The anode of the emitter connection DC power supply BAT1 of triode Q2.
The base stage of third transistor Q3 is connect with the base stage of the 4th triode Q4, the emitter of third transistor Q3 and the 4th
The emitter of triode Q4 is grounded.
The common end a of first triode Q1 and the second triode Q2 are connect with one end of first resistor R1, third transistor
The common end b of Q3 and the 4th triode Q4 are connect with the other end of first resistor R1.
The collector of second triode Q2 is connect with first resistor R1, the collector and first resistor R1 of the 4th triode Q4
Connection.
The cathode of first diode D1 is connect with the anode of the second diode D2, the base stage and the one or two of the 5th triode Q5
The anode connection of the cathode of pole pipe D1, the second diode D2；First diode D1, the second diode D2 and the 5th triode Q5's
Common end g is connect with the 6th pin of 555 chip U1.
The 4th pin of 555 chip U1 connect the anode of DC power supply BAT1 with the 8th pin, and the 1st of 555 chip U1 the
Pin ground connection.
The 3rd pin of 555 chip U1 is connect with the anode of the cathode of third diode D3, the 4th diode D4.
It is grounded after the 2nd pin of 555 chip U1 and the connection of the 6th pin by capacitor C1.
The anode of third diode D3 is connect with the anode of first diode D1, third diode D3 and first diode D1
Common end d connect with the collector of the first triode Q1.
The cathode of 4th diode D4 is connect with the cathode of the second diode D2, the 4th diode D4 and the second diode D2
Common end c connect with the collector of third transistor Q3.
The anode of the collector connection DC power supply BAT1 of 5th triode Q5, the emitter of the 5th triode Q5 are logical
Cross second resistance R2 ground connection.
The emitter of 5th triode Q5 and the common end f of second resistance R2 are the output end of triangle wave generating circuit.
5th triode Q5 and second resistance R2 composition output buffer stage, reduces output impedance, triangular signal is from the end Vo
Output.
Wherein, the first triode Q1, the second triode Q2, the 5th triode Q5 are PNP type triode；Third transistor Q3
It is NPN type triode with the 4th triode Q4.
First diode D1, the second diode D2, third diode D3, the 4th diode D4 are fast recovery diode.
As shown in Figure 1, the first triode Q1 and the second triode Q2 constitutes constant-current source, for linearly filling to capacitor C1 realization
Electricity；Third transistor Q3 and the 4th triode Q4 constitutes constant-current source, for realizing linear discharge to capacitor C1.
The course of work of triangular signal generation circuit are as follows:
1, when DC power supply BAT1 is just switched on, voltage on capacitor C1 is the 2nd pin and the 6th of 0,555 chip U1
The voltage of pin exports high level, first diode D1, the four or two pole less than 1/3 supply voltage, the 3rd pin of 555 chip U1
Pipe D4 positively biased, the second diode D2, third diode D3 are reverse-biased, and the electric current on the collector of the first triode Q1 passes through the one or two
Pole pipe D1 charges to capacitor C1.
2, when the voltage linear on capacitor C1 rises to 2/3 supply voltage, the 6th foot of 555 chip U1 draws triggering, makes
The 3rd pin of 555 chip U1 exports low level；First diode D1, the 4th diode D4 are reverse-biased at this time, the second diode D2,
Third diode D3 positively biased, the charge on capacitor C1 are discharged by the collector of the second diode D2 and third transistor Q3.
3, when the voltage linear on capacitor C1 drops to 1/3 supply voltage, the 2nd pin of 555 chip U1 is triggered, and is made
The 3rd pin of 555 chip U1 exports high level；First diode D1, the 4th diode D4 positively biased, the second diode D2, third
Diode D3 is reverse-biased, and the electric current on the collector of the first triode Q1 is charged by first diode D1 to capacitor C1；Again it returns
To process 2.
Since capacitor C1 constantly charges, discharges, i.e., it is repeated cyclically between process 2 and process 3, the 2nd of 555 chips the
Pin and the 6th pin can obtain the very high triangular wave of the linearity, in the 3rd available duty ratio of pin of 555 chip U1
For 50% square wave.
The frequency f that the triangle wave generating circuit exports triangular wave can be according to the resistance value of first resistor R1 and capacitor C1
Capacitance is determining, i.e.,It is adjustable by the resistance value of adjusting first resistor R1 or the capacitance of capacitor C1
The frequency f of triangular wave.
Triangular signal provided by the embodiment of the utility model occurs to utilize the first triode Q1 of positive-negative-positive and the in circuit
Two triode Q2 constitute constant-current source, realize linear-charging to capacitor C1, utilize the third transistor Q3 and the 4th triode of NPN type
Q4 constitutes constant-current source, realizes linear discharge to capacitor C1, and the charge and discharge process for solving capacitor in RC integrating circuit exists centainly
It is non-linear, lead to the not high problem of the triangular signal linearity generated；The line for improving the triangular signal generated is reached
The effect of property degree.
It should be understood that above-mentioned the utility model embodiment serial number is for illustration only, do not represent the advantages or disadvantages of the embodiments.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (3)
1. circuit occurs for a kind of triangular signal, which is characterized in that including DC power supply, capacitor, 555 chips, 4 two poles
Pipe, 5 triodes and 2 resistance；
The anode of 4th pin of 555 chips and the 8th pin connection DC power supply, the 2nd pin of 555 chips and the 6th pin
By capacity earth after connection, the 3rd pin of 555 chips is connect with the anode of the cathode of third diode, the 4th diode；
The anode connection of the cathode, the second diode of the base stage and first diode of 5th triode, the 5th triode, the one or two
The common end of pole pipe and the second diode is connect with the 6th pin of 555 chips；
The collector of first triode is connect with the anode of the anode of third diode, first diode；
The collector of third transistor is connect with the cathode of the cathode of the second diode, the 4th diode；
The base stage of first triode is connect with the base stage of the second triode, the common end of the first triode and the second triode and the
One end of one resistance connects；
The base stage of third transistor is connect with the base stage of the 4th triode, the common end of third transistor and the 4th triode and the
The other end of one resistance connects；
The emitter ground connection of the emitter of third transistor, the 4th triode；
The collector of the emitter of first triode, the emitter of the second triode and the 5th triode connects DC power supply
Cathode；
The emitter of 5th triode is grounded by second resistance, and the emitter of the 5th triode and the common end of second resistance are
The output end of triangle wave generating circuit.
2. circuit occurs for triangular signal according to claim 1, which is characterized in that first triode, described the
Two triodes, the 5th triode are PNP type triode；
The third transistor and the 4th triode are NPN type triode.
3. circuit occurs for triangular signal according to claim 1, which is characterized in that 4 diodes are two poles of fast recovery
Pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822154929.6U CN209184572U (en) | 2018-12-20 | 2018-12-20 | A kind of triangular signal generation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822154929.6U CN209184572U (en) | 2018-12-20 | 2018-12-20 | A kind of triangular signal generation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209184572U true CN209184572U (en) | 2019-07-30 |
Family
ID=67377522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822154929.6U Active CN209184572U (en) | 2018-12-20 | 2018-12-20 | A kind of triangular signal generation circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209184572U (en) |
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2018
- 2018-12-20 CN CN201822154929.6U patent/CN209184572U/en active Active
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