CN219247804U - Anti-interference triangular wave carrier circuit - Google Patents
Anti-interference triangular wave carrier circuit Download PDFInfo
- Publication number
- CN219247804U CN219247804U CN202222520100.XU CN202222520100U CN219247804U CN 219247804 U CN219247804 U CN 219247804U CN 202222520100 U CN202222520100 U CN 202222520100U CN 219247804 U CN219247804 U CN 219247804U
- Authority
- CN
- China
- Prior art keywords
- resistor
- circuit
- comparator
- triangular wave
- signal
- 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.)
- Active
Links
Images
Landscapes
- Inverter Devices (AREA)
Abstract
The application relates to an anti-interference triangular wave carrier circuit, which relates to the technical field of carrier circuits and comprises a triangular wave generating circuit, a signal generating circuit and a signal generating circuit, wherein the triangular wave generating circuit comprises a power input end and a signal output end; the second comparator U2 comprises an anode input end, a cathode input end and an output end, wherein the anode input end is used for being connected with a preset modulation wave signal, and the cathode input end is connected with the signal output end and used for being connected with a triangular wave signal; the modulating circuit comprises a signal access end, a power supply end, a waveform signal end and a grounding end, wherein the signal access end is connected with the output end and used for accessing a primary waveform signal, the power supply end is used for being connected with the power supply, the grounding end is grounded, and the waveform signal end is used for outputting a modulated waveform signal. The circuit anti-interference circuit has the effect of improving the anti-interference capability of the circuit.
Description
Technical Field
The application relates to the technical field of carrier circuits, in particular to an anti-interference triangular wave carrier circuit.
Background
Currently, in an analog control system, a corresponding triangular wave carrier circuit needs to be built by hardware. The triangular wave carrier circuit at least comprises an operational amplifier, a comparator and a peripheral circuit, so that the whole circuit has more components.
With respect to the related art in the above, the inventors consider that: the triangular wave carrier circuit has more components and is easy to be interfered, so that the defect of weak anti-interference capability of the circuit is caused.
Disclosure of Invention
The purpose of the application is to provide an anti-interference triangular wave carrier circuit, which has the effect of improving the anti-interference capability of the circuit.
The anti-interference triangular wave carrier circuit provided by the application adopts the following technical scheme:
an anti-interference triangular wave carrier circuit comprising:
the triangular wave generating circuit comprises a power input end and a signal output end, wherein the power input end is used for being connected with a power supply, and the signal output end is used for outputting triangular wave signals;
the second comparator U2 comprises an anode input end, a cathode input end and an output end, wherein the anode input end is used for being connected with a preset modulation wave signal, and the cathode input end is connected with the signal output end and used for being connected with a triangular wave signal;
the modulating circuit comprises a signal access end, a power supply end, a waveform signal end and a grounding end, wherein the signal access end is connected with the output end and used for accessing a primary waveform signal, the power supply end is used for being connected with the power supply, the grounding end is grounded, and the waveform signal end is used for outputting a modulated waveform signal.
By adopting the technical scheme, the triangular wave generating circuit is favorable for directly generating triangular waves, primary waveform signals are formed through primary modulation of the second comparator U2 and the modulated wave signals, then the primary waveform signals are directly subjected to intensified output and further modulation through the modulating circuit, the modulated waveform signals are output, fewer components are used, and meanwhile, the modulating circuit also enhances the output stability, so that the anti-interference capability of the circuit is improved.
Optionally, the triangular wave generating circuit includes a first sub-circuit, a first comparator U1 and a second sub-circuit, where the first sub-circuit is connected with the negative input end and the output end of the first comparator U1, the second sub-circuit is connected with the positive input end, the output end and the first sub-circuit of the first comparator U1, and the first sub-circuit is also connected with the negative output end of the second comparator U2.
Through adopting above-mentioned technical scheme, first sub-circuit, first comparator U1 and second sub-circuit mutually support and are favorable to utilizing less components and parts to produce the triangular wave, and transmit to second comparator U2 through first sub-circuit to be favorable to improving the interference killing feature of circuit.
Optionally, the first sub-circuit includes a first capacitor C1, a second resistor R2, and a fourth resistor R4, where one end of the first capacitor C1 is grounded, the other end of the first capacitor C1 is connected to one end of the second resistor R2, the negative input end of the first comparator U1, and the negative input end of the second comparator U2, the other end of the second resistor R2 is connected to one end of the fourth resistor R4 and the output end of the first comparator U1, and the other end of the fourth resistor R4 is connected to the power VCC.
Through adopting above-mentioned technical scheme, when the high level of first comparator U1 output, the VCC power charges first condenser C1 through fourth resistor R4 and second resistor R2, is favorable to reducing components and parts quantity and is convenient for charge first condenser C1.
Optionally, the second sub-circuit includes a first resistor R1, a first diode D1, a voltage stabilizing tube ZD1 and a third resistor R3, one end of the first resistor R1 is connected with the power VCC, the other end of the first resistor R1 is connected with the positive pole of the first diode D1 and the positive pole of the voltage stabilizing tube ZD1, the negative pole of the first diode D1 is grounded, the negative pole of the voltage stabilizing tube ZD1 is connected with one end of the third resistor R3 and the positive pole input end of the first comparator U1, and the other end of the third resistor R3 is connected with the output end of the first comparator U1.
Through adopting above-mentioned technical scheme, regulator tube ZD1 and first diode D1 are favorable to confirming the voltage of the positive pole input of first comparator U1, and when the positive negative pole input voltage of first comparator U1 equals, first condenser C1 charges at this moment and ends, and first comparator U1's output is low level, is favorable to first condenser C1 to get into the stage of discharging smoothly.
Optionally, the modulation circuit includes a fifth resistor R5 and a sixth resistor R6, one end of the fifth resistor R5 is connected to the output end of the second comparator U2, the other end of the fifth resistor R5 is connected to one end of the sixth resistor R6 and grounded, and the other end of the sixth resistor R6 is used for switching in the voltage VD.
By adopting the technical scheme, the fifth resistor R5 and the sixth resistor R6 are beneficial to improving the output capability of the second comparator U2.
Optionally, a second diode D2 is connected between the fifth resistor R5 and the sixth resistor R6, and an anode of the second diode D2 is grounded.
By adopting the technical scheme, the second comparator U2 can output negative voltage to clamp.
Optionally, the models of the first comparator U1 and the second comparator U2 are LM339.
By adopting the technical scheme, triangular wave generation is better facilitated, and the types of components are reduced.
Drawings
Fig. 1 is a schematic circuit connection diagram of an anti-interference triangular wave carrier circuit in an embodiment of the present application;
in the figure, 1, a triangular wave generating circuit; 11. a first sub-circuit; 12. a second sub-circuit; 2. a modulation circuit.
Detailed Description
The present application is described in further detail below in conjunction with fig. 1.
Referring to fig. 1, an anti-interference triangular wave carrier circuit includes a triangular wave generating circuit 1, a second comparator U2, and a modulating circuit 2. The triangular wave generating circuit 1 comprises a power input end and a signal output end, wherein the power input end is used for being connected with a power supply, and the signal output end is used for outputting triangular wave signals. The second comparator U2 comprises an anode input end, a cathode input end and an output end, wherein the anode input end is used for being connected with a preset modulation wave signal, and the cathode input end is connected with the signal output end and used for being connected with a triangular wave signal. The modulating circuit 2 comprises a signal access end, a power end, a waveform signal end and a grounding end, wherein the signal access end is connected with the output end and used for accessing a primary waveform signal, the power end is used for being connected with the power supply, the grounding end is grounded, and the waveform signal end is used for outputting a modulated waveform signal.
Specifically, the triangular wave generating circuit 1 includes a first sub-circuit 11, a first comparator U1, and a second sub-circuit 12, where the first sub-circuit 11 is connected to the negative input terminal and the output terminal of the first comparator U1, the second sub-circuit 12 is connected to the positive input terminal and the output terminal of the first comparator U1, the first sub-circuit 11, and the first sub-circuit 11 is also connected to the negative output terminal of the second comparator U2.
The first comparator U1 and the second comparator U2 are powered by double power supplies, wherein VSS is a negative power supply, and VCC is a positive power supply.
The first sub-circuit 11 includes a first capacitor C1, a second resistor R2, and a fourth resistor R4, one end of the first capacitor C1 is grounded, the other end of the first capacitor C1 is connected to one end of the second resistor R2, the negative input terminal of the first comparator U1, and the negative input terminal of the second comparator U2, the other end of the second resistor R2 is connected to one end of the fourth resistor R4, the output terminal of the first comparator U1, and the other end of the fourth resistor R4 is connected to the power VCC.
The second sub-circuit 12 includes a first resistor R1, a first diode D1, a voltage regulator ZD1, and a third resistor R3, where one end of the first resistor R1 is connected to the power VCC, the other end of the first resistor R1 is connected to the anode of the first diode D1 and the anode of the voltage regulator ZD1, the cathode of the first diode D1 is grounded, the cathode of the voltage regulator ZD1 is connected to one end of the third resistor R3 and the anode input end of the first comparator U1, and the other end of the third resistor R3 is connected to the output end of the first comparator U1, one end of the second resistor R2 far from the first capacitor C1, and one end of the fourth resistor R4 near the output end of the first comparator U1.
Note that, referring to fig. 1, the point a potential is VA, the point B potential is VB, the point C potential is VC, and the point a is a triangular wave output. When the output of the first comparator U1 is high-level, the power supply VCC charges the first capacitor C1 through the fourth resistor R4 and the second resistor R2, so the potential of the point a rises.
The voltage at point a is: v' a=vcc×e -t1/(R2+R4)C1 The change voltage of the point B is as follows: v' b=vzd1+vd1, where R2 is the resistance value of the second resistor R2, R4 is the resistance value of the fourth resistor R4, C1 is the capacitance value of the first capacitor, and t1 represents the charging time of the first capacitor C1.
VZD1 is the regulated voltage of the regulator tube ZD1D, and VD1 is the PN voltage of the first diode D1. When the potential at the point a is the same as the potential at the point B, the charging of the first capacitor C1 is finished, and at this time, the output end of the first comparator U1 outputs a low level, and the charging time of the first capacitor C1 is as follows:
when the charging of the first capacitor C1 is completed, the first capacitor C1 starts to discharge, the potential at the point a drops, and the voltage at the point a, which changes again, is: v "a= (V' a-VSS) ×e -t2/R2C1 At this time, the B-point potential is: v "b=vd1-vzd1pn, where vzd1pn is the forward PN junction voltage of the regulator ZD1. When the potential at the point A and the potential at the point B are the same, the discharging of the first capacitor C1 is finished, and the first comparator U1 outputs a high level. The discharge time of the first capacitor C1 is:
in this embodiment, the selection of the component parameters is based on the premise of t1=t2, so that the circuit outputs a relatively standard triangular wave through the charge and discharge of the first capacitor C1. And the peak value of the triangular wave is as follows: vpeak-min=vd1-vzd1pn, vpeak-max=vd1+vzd1.
The modulation circuit 2 includes a fifth resistor R5 and a sixth resistor R6, one end of the fifth resistor R5 is connected to the output terminal of the second comparator U2, the other end of the fifth resistor R5 is connected to one end of the sixth resistor R6 and grounded, and the other end of the sixth resistor R6 is used for receiving the pull-up voltage VD.
A second diode D2 is connected between the fifth resistor R5 and the sixth resistor R6, and the anode of the second diode D2 is grounded.
The pull-up voltage VD, the fifth resistor R5, and the sixth resistor R6 are increased, the fifth resistor R5, and the sixth resistor R6 serve as current limiting resistors, and the second diode D2 clamps the comparator output negative voltage VSS to-0.2V.
Optionally, the first comparator U1 and the second comparator U2 are each LM339.
Note that, when the modulated wave is larger than the triangular wave, the second comparator U2 outputs a high level; when the modulated wave is smaller than the triangular wave, the second comparator U2 outputs a low level; when the value of the modulated wave is 0: if the triangular wave Vpeak-min=0, then the output of the second comparator U2 should be at a low level, but as long as the modulated wave appears unstable, such as high frequency disturbances, the output of the second comparator U2 will be at a high level. Therefore, in this embodiment, the PN junction voltage VD1 of the first diode D1 is selected to be greater than the PN junction voltage VZD1PN of the voltage regulator ZD1, so that the lowest peak value of the triangular wave is kept greater than 0, and thus the interference signal superimposed by the modulated wave is in the range of 0 to Vpeak-min, and in this case, the output of the second comparator U2 is kept at a low level, thereby realizing enhancement of the anti-interference capability.
The embodiments of this embodiment are all preferred embodiments of the present application, and are not intended to limit the scope of the present application, in which like parts are denoted by like reference numerals. Therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (7)
1. An anti-interference triangular wave carrier circuit, comprising:
the triangular wave generating circuit (1) comprises a power input end and a signal output end, wherein the power input end is used for being connected with a power supply, and the signal output end is used for outputting triangular wave signals;
the second comparator U2 comprises an anode input end, a cathode input end and an output end, wherein the anode input end is used for being connected with a preset modulation wave signal, and the cathode input end is connected with the signal output end and used for being connected with a triangular wave signal;
the modulating circuit (2) comprises a signal access end, a power supply end, a waveform signal end and a grounding end, wherein the signal access end is connected with the output end and used for accessing a primary waveform signal, the power supply end is used for being connected with the power supply, the grounding end is grounded, and the waveform signal end is used for outputting a modulated waveform signal.
2. An anti-interference triangular wave carrier circuit according to claim 1, characterized in that the triangular wave generating circuit (1) comprises a first sub-circuit (11), a first comparator U1 and a second sub-circuit (12), the first sub-circuit (11) is connected with the negative input terminal, the output terminal of the first comparator U1, the second sub-circuit (12) is connected with the positive input terminal, the output terminal and the first sub-circuit (11) of the first comparator U1, and the first sub-circuit (11) is also connected with the negative output terminal of the second comparator U2.
3. An anti-interference triangular wave carrier circuit according to claim 2, characterized in that the first sub-circuit (11) comprises a first capacitor C1, a second resistor R2 and a fourth resistor R4, one end of the first capacitor C1 is grounded, the other end of the first capacitor C1 is connected to one end of the second resistor R2, the negative input terminal of the first comparator U1, the negative input terminal of the second comparator U2, the other end of the second resistor R2 is connected to one end of the fourth resistor R4, the output terminal of the first comparator U1, and the other end of the fourth resistor R4 is connected to the power supply VCC.
4. An anti-interference triangular wave carrier circuit according to claim 3, wherein the second sub-circuit (12) comprises a first resistor R1, a first diode D1, a voltage regulator ZD1 and a third resistor R3, one end of the first resistor R1 is connected with a power supply VCC, the other end of the first resistor R1 is connected with the positive pole of the first diode D1 and the positive pole of the voltage regulator ZD1, the negative pole of the first diode D1 is grounded, the negative pole of the voltage regulator ZD1 is connected with one end of the third resistor R3 and the positive pole input end of the first comparator U1, and the other end of the third resistor R3 is connected with the output end of the first comparator U1.
5. An anti-interference triangular wave carrier circuit according to claim 1, characterized in that the modulation circuit (2) comprises a fifth resistor R5 and a sixth resistor R6, one end of the fifth resistor R5 being connected to the output of the second comparator U2, the other end of the fifth resistor R5 being connected to one end of the sixth resistor R6 and to ground, the other end of the sixth resistor R6 being adapted to be connected to the voltage VD.
6. The anti-interference triangular wave carrier circuit according to claim 5, wherein a second diode D2 is connected between the fifth resistor R5 and the sixth resistor R6, and the positive electrode of the second diode D2 is grounded.
7. The anti-interference triangular wave carrier circuit according to claim 2, wherein the first comparator U1 and the second comparator U2 are each of the LM339.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222520100.XU CN219247804U (en) | 2022-09-22 | 2022-09-22 | Anti-interference triangular wave carrier circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222520100.XU CN219247804U (en) | 2022-09-22 | 2022-09-22 | Anti-interference triangular wave carrier circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219247804U true CN219247804U (en) | 2023-06-23 |
Family
ID=86843899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222520100.XU Active CN219247804U (en) | 2022-09-22 | 2022-09-22 | Anti-interference triangular wave carrier circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219247804U (en) |
-
2022
- 2022-09-22 CN CN202222520100.XU patent/CN219247804U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1848683B (en) | Trianglar-wave generator and pulse-width modulation signal generating circuit containing the same | |
| CN112805587B (en) | Laser emission circuit and laser radar | |
| CN103023463B (en) | A kind of ramp signal generative circuit and ramp signal generator | |
| CN107241083A (en) | A kind of high-precision automatic biasing clock circuit and corresponding auto bias circuit | |
| CN203574531U (en) | A mos transistor drive circuit based on high-frequency oscillation signals | |
| CN219247804U (en) | Anti-interference triangular wave carrier circuit | |
| CN113985953B (en) | Non-band-gap reference source with over-temperature protection and soft start characteristics | |
| CN106537726B (en) | A kind of vehicle electricity based on vehicle power supply and super capacitor power switching circuit | |
| CN202652374U (en) | Television and mute auxiliary control circuit thereof | |
| CN214480523U (en) | Pulse width modulation signal generating circuit | |
| CN214315229U (en) | Vehicle pulse acquisition circuit, vehicle pulse acquisition equipment and vehicle | |
| CN212627837U (en) | Vehicle-mounted delay circuit, vehicle-mounted delay system and automobile | |
| CN103762984A (en) | Non-communication type remote analog acquisition device | |
| CN212627856U (en) | Conversion circuit for converting unipolar digital signals into bipolar digital signals | |
| CN110690893B (en) | High-frequency driving system | |
| CN116260223A (en) | Energy storage circuit with isolation function | |
| CN107947777B (en) | Reset circuit of optical module, optical module and optical network terminal | |
| CN112805586A (en) | Laser emission circuit and laser radar | |
| CN219107429U (en) | Successive approximation type analog-digital converter and period-adjustable multiphase clock generation circuit thereof | |
| CN219554825U (en) | Low-cost negative voltage generation circuit | |
| CN112234951A (en) | Common mode active EMI filter | |
| CN211018640U (en) | Switching power supply circuit and power supply system | |
| CN209184572U (en) | A kind of triangular signal generation circuit | |
| CN216794972U (en) | Switching circuit of low-voltage power supply | |
| CN115395638B (en) | High formwork gateway hybrid power supply system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |