CN111404516B - Symmetrical voltage triangular wave generator and implementation method thereof - Google Patents
Symmetrical voltage triangular wave generator and implementation method thereof Download PDFInfo
- Publication number
- CN111404516B CN111404516B CN202010227972.XA CN202010227972A CN111404516B CN 111404516 B CN111404516 B CN 111404516B CN 202010227972 A CN202010227972 A CN 202010227972A CN 111404516 B CN111404516 B CN 111404516B
- Authority
- CN
- China
- Prior art keywords
- integrator
- circuit
- voltage
- output
- input end
- 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
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K4/00—Generating pulses having essentially a finite slope or stepped portions
- H03K4/06—Generating pulses having essentially a finite slope or stepped portions having triangular shape
Abstract
The invention discloses a symmetrical voltage triangular wave generator and an implementation method thereof. The super servo circuit comprises an alternating current filtering direct current zero drift sampling circuit and a direct current zero drift amplifying circuit. The invention adds super servo circuit on the basis of the existing square wave-to-triangle wave circuit, and feeds back the bias voltage output by the voltage triangle wave generator to the input end, and because the capacitance in the circuit attenuates the alternating current component and amplifies the direct current component, the bias voltage of the integral amplifier is quickly amplified and fed back to the input end of the integral amplifier, so that the voltage at the input end of the integral amplifier is regulated in real time along with the output, thereby improving the symmetry of triangle waves output by the integral amplifier.
Description
Technical Field
The invention relates to a symmetrical voltage triangular wave generator and an implementation method thereof, belonging to the technical field of metering verification instruments and meters.
Background
Triangular waves are often used as carrier signals in the fields of communication, radar and PWM, so that a symmetrical triangular wave with high precision and no DC offset voltage is critical for signal transmission in the field.
As shown in FIG. 1, in a conventional method, a single-chip analog chip (NE 555) or a hysteresis comparison circuit is used for outputting a turnover characteristic exceeding a threshold voltage, and peripheral triodes, capacitors and other devices are added to form an oscillating circuit. As shown in fig. 2, another scheme is to generate a square wave by a singlechip to control a switch to switch a current source, and then convert the square wave into a triangular wave by an integrating circuit.
The symmetry of the current circuit output waveform depends on the offset voltage of the front-stage amplifier, and the reliability is poor. In addition, in the initial stage of integrating square wave into triangular wave, the negative input end of the integrating circuit amplifier has bias voltage, so that the output triangular wave always has a larger bias voltage, even when the input bias voltage is too large, the output waveform is direct current rather than triangular wave, so that if the circuit is to generate a symmetric triangular wave without direct current zero drift, further optimization is needed.
Disclosure of Invention
In order to solve the above problems, the present invention provides a symmetrical voltage triangular wave generator and a realization method thereof, which can improve the triangular wave symmetry of the triangular wave symmetry output.
The technical scheme adopted for solving the technical problems is as follows:
in one aspect, the symmetrical voltage triangle wave generator provided by the embodiment of the invention comprises an integrator and a super servo circuit, wherein the reverse input end of the integrator is connected with a square wave signal, and the super servo circuit feeds back the bias voltage output by the integrator to the same-direction input end of the integrator.
As one possible implementation manner of this embodiment, the super servo circuit includes an ac filtering dc zero drift sampling circuit and a dc zero drift amplifying circuit, where an input end of the ac filtering dc zero drift sampling circuit is connected to an output end of the integrator, an output end of the ac filtering dc zero drift sampling circuit is connected to an input end of the dc zero drift amplifying circuit, and an output end of the dc zero drift amplifying circuit is connected to an input end of the integrator.
As one possible implementation manner of this embodiment, the integrator includes a resistor Rt5, a capacitor C4 and an operational amplifier U5, one end of the resistor Rt5 is connected to an output end of the current source, the other end and the adjustable end of the resistor Rt5 are respectively connected to an inverting input end of the operational amplifier U5, two ends of the capacitor C4 are respectively connected to an inverting input end and an output end of the operational amplifier U5, and a series current filtering direct current zero drift sampling circuit and a direct current zero drift amplifying circuit are connected between the output end and the homodromous input end of the operational amplifier U5.
As a possible implementation manner of this embodiment, the current filtering dc zero-drift sampling circuit attenuates an ac component in the bias voltage output by the integrator, and the dc zero-drift amplifying circuit amplifies a dc component in the bias voltage output by the integrator.
As a possible implementation manner of this embodiment, the super servo circuit rapidly amplifies and feeds back the bias voltage output by the integrator to the input end of the integrator, so that the voltage at the input end of the integrator is adjusted in real time along with the output of the integrator.
As a possible implementation manner of this embodiment, the square wave signal is generated by a singlechip, a circuit switch and a current source which are sequentially connected.
On the other hand, the implementation method of the symmetrical voltage triangular wave generator provided by the embodiment of the invention carries out AC component attenuation and DC part amplification on the bias voltage output by the voltage triangular wave generator and then feeds back the bias voltage to the input end of the voltage triangular wave generator.
As a possible implementation manner of this embodiment, the voltage triangle wave generator adopts a symmetrical voltage triangle wave generator as described above.
The technical scheme of the embodiment of the invention has the following beneficial effects:
the invention adds super servo circuit on the basis of the existing square wave-to-triangle wave circuit, and feeds back the bias voltage output by the voltage triangle wave generator to the input end, and because the capacitance in the circuit attenuates the alternating current component and amplifies the direct current component, the bias voltage of the integral amplifier is quickly amplified and fed back to the input end of the integral amplifier, so that the voltage at the input end of the integral amplifier is regulated in real time along with the output, thereby improving the symmetry of triangle waves output by the integral amplifier.
According to the invention, by using super servo feedback regulation, the influence of input offset voltage in the square wave-to-triangular wave circuit on output is optimized, so that the output cannot be asymmetric or even distorted due to the input offset voltage. The simplicity and the rapid adjustment performance of the super servo circuit enable the symmetry of the triangular wave generator to be better, and the precision and the reliability of the triangular wave generator are improved.
Description of the drawings:
fig. 1 is a diagram of a conventional triangular wave generation circuit;
FIG. 2 is a diagram of another prior art square wave conversion triangle wave circuit;
fig. 3 is a functional block diagram of a symmetrical voltage triangle wave generator, according to an exemplary embodiment.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
in order to clearly illustrate the technical features of the present solution, the present invention will be described in detail below with reference to the following detailed description and the accompanying drawings. The following disclosure provides many different embodiments, or examples, for implementing different structures of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. It should be noted that the components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted so as to not unnecessarily obscure the present invention.
Fig. 3 is a functional block diagram of a symmetrical voltage triangle wave generator, according to an exemplary embodiment. As shown in fig. 3, the symmetrical voltage triangle wave generator provided by the embodiment of the invention comprises an integrator and a super servo circuit, wherein the reverse input end of the integrator is connected with a square wave signal, and the super servo circuit feeds back the bias voltage output by the integrator to the same-direction input end of the integrator. The invention optimizes the performance of the triangular wave generating circuit through the super servo circuit, realizes the adjustment of input offset voltage, and improves the symmetry of the output triangular wave.
As one possible implementation manner of this embodiment, the super servo circuit includes an ac filtering dc zero drift sampling circuit and a dc zero drift amplifying circuit, where an input end of the ac filtering dc zero drift sampling circuit is connected to an output end of the integrator, an output end of the ac filtering dc zero drift sampling circuit is connected to an input end of the dc zero drift amplifying circuit, and an output end of the dc zero drift amplifying circuit is connected to an input end of the integrator.
As one possible implementation manner of this embodiment, the integrator includes a resistor Rt5, a capacitor C4 and an operational amplifier U5, one end of the resistor Rt5 is connected to an output end of the current source, the other end and the adjustable end of the resistor Rt5 are respectively connected to an inverting input end of the operational amplifier U5, two ends of the capacitor C4 are respectively connected to an inverting input end and an output end of the operational amplifier U5, and a series current filtering direct current zero drift sampling circuit and a direct current zero drift amplifying circuit are connected between the output end and the homodromous input end of the operational amplifier U5.
As a possible implementation manner of this embodiment, the current filtering dc zero-drift sampling circuit attenuates an ac component in the bias voltage output by the integrator, and the dc zero-drift amplifying circuit amplifies a dc component in the bias voltage output by the integrator.
As a possible implementation manner of this embodiment, the super servo circuit rapidly amplifies and feeds back the bias voltage output by the integrator to the input end of the integrator, so that the voltage at the input end of the integrator is adjusted in real time along with the output of the integrator.
As a possible implementation manner of this embodiment, the square wave signal is generated by a singlechip, a circuit switch and a current source which are sequentially connected.
According to the implementation method of the symmetrical voltage triangular wave generator, the offset voltage output by the voltage triangular wave generator is attenuated by alternating current components, amplified by direct current components and fed back to the input end of the voltage triangular wave generator.
As a possible implementation manner of this embodiment, the voltage triangle wave generator adopts a symmetrical voltage triangle wave generator as described above, as shown in fig. 3.
The principle of the invention for realizing the symmetrical voltage triangular wave generator is as follows: the square wave signal charges and discharges C4 through Rt5, and the current magnitude is controlled by Rt5, so the frequency is also controlled by Rt 5. The input bias voltage is integrated to the output end along with the integrator, the input square wave signal is converted into triangular wave, and then the triangular wave is fed back to the same-direction input end of U5 through the super servo circuit. Since the filter circuit in the servo circuit amplifies the dc component and attenuates the ac component, the ac component triangle wave in the output component of U5 is attenuated sharply in the feedback to the input terminal, and the dc bias voltage is amplified rapidly, so that almost all the components fed back to the co-directional input terminal of U5 are dc components. Through servo feedback adjustment, even if the input offset voltage of U5 is bigger, the offset voltage part of output can also be adjusted triangle wave signal rapidly and output triangle wave is pulled to symmetrical position.
According to the invention, by using super servo feedback regulation, the influence of input offset voltage in the square wave-to-triangular wave circuit on output is optimized, so that the output cannot be asymmetric or even distorted due to the input offset voltage. The simplicity and the rapid adjustment performance of the super servo circuit enable the symmetry of the triangular wave generator to be better, and the precision and the reliability of the triangular wave generator are improved.
The foregoing is only a preferred embodiment of the present invention, and it will be apparent to those skilled in the art that numerous modifications and variations can be made without departing from the principles of the invention, and such modifications and variations are considered to be within the scope of the invention.
Claims (7)
1. The symmetrical voltage triangular wave generator is characterized by comprising an integrator and a super servo circuit, wherein the reverse input end of the integrator is connected with a square wave signal, and the super servo circuit feeds back the bias voltage output by the integrator to the same-direction input end of the integrator;
the super servo circuit comprises an alternating current filtering direct current zero drift sampling circuit and a direct current zero drift amplifying circuit, wherein the input end of the alternating current filtering direct current zero drift sampling circuit is connected with the output end of the integrator, the output end of the alternating current filtering direct current zero drift sampling circuit is connected with the input end of the direct current zero drift amplifying circuit, and the output end of the direct current zero drift amplifying circuit is connected with the input end of the integrator.
2. The symmetrical voltage triangle wave generator according to claim 1, wherein the integrator comprises a resistor Rt5, a capacitor C4 and an operational amplifier U5, one end of the resistor Rt5 is connected with the output end of the current source, the other end and the adjustable end of the resistor Rt5 are respectively connected with the inverting input end of the operational amplifier U5, two ends of the capacitor C4 are respectively connected with the inverting input end and the output end of the operational amplifier U5, and an alternating current filtering direct current zero drift sampling circuit and a direct current zero drift amplifying circuit are connected in series between the output end and the homodromous input end of the operational amplifier U5.
3. The symmetrical voltage triangle wave generator of claim 1 wherein the ac filter dc zero drift sampling circuit attenuates ac components in the bias voltage output by the integrator and the dc zero drift amplifying circuit amplifies dc components in the bias voltage output by the integrator.
4. A symmetrical voltage triangle wave generator according to any of claims 1-3 wherein the super servo circuit rapidly amplifies the bias voltage output by the integrator back to the input of the integrator so that the voltage at the input of the integrator is regulated in real time following the integrator output.
5. A symmetrical voltage triangle wave generator according to any of claims 1-3, wherein the square wave signal is generated by a single chip microcomputer, a circuit switch and a current source which are connected in sequence.
6. A method for realizing a symmetrical voltage triangular wave generator is characterized in that offset voltage output by the voltage triangular wave generator is subjected to AC component attenuation and DC part amplification and then fed back to the homodromous input end of the voltage triangular wave generator.
7. The method of claim 6, wherein the voltage triangle generator is a symmetrical voltage triangle generator according to any one of claims 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010227972.XA CN111404516B (en) | 2020-03-27 | 2020-03-27 | Symmetrical voltage triangular wave generator and implementation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010227972.XA CN111404516B (en) | 2020-03-27 | 2020-03-27 | Symmetrical voltage triangular wave generator and implementation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111404516A CN111404516A (en) | 2020-07-10 |
| CN111404516B true CN111404516B (en) | 2023-05-26 |
Family
ID=71431377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010227972.XA Active CN111404516B (en) | 2020-03-27 | 2020-03-27 | Symmetrical voltage triangular wave generator and implementation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111404516B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3667055A (en) * | 1969-06-03 | 1972-05-30 | Iwatsu Electric Co Ltd | Integrating network using at least one d-c amplifier |
| US4516038A (en) * | 1982-11-19 | 1985-05-07 | Sundstrand Corporation | Triangle wave generator |
| JPH06310997A (en) * | 1993-04-27 | 1994-11-04 | Canon Inc | Triangular wave generating circuit |
| JP2006517367A (en) * | 2003-02-11 | 2006-07-20 | ビーエイチシー コンサルティング プロプライエタリー リミテッド | Low distortion class D amplifier using carrier reference signal symmetry modulation |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5013931A (en) * | 1988-11-15 | 1991-05-07 | Hughes Aircraft Company | Programmable triangle wave generator |
| JP4684112B2 (en) * | 2006-01-31 | 2011-05-18 | 富士通テン株式会社 | Triangular wave generation circuit |
| US7746130B2 (en) * | 2008-07-14 | 2010-06-29 | Elite Semiconductor Memory Technology, Inc. | Triangular wave generating circuit having synchronization with external clock |
| JP2010087561A (en) * | 2008-09-29 | 2010-04-15 | Sanyo Electric Co Ltd | Triangular wave generation device |
| JP2010087562A (en) * | 2008-09-29 | 2010-04-15 | Sanyo Electric Co Ltd | Triangular wave generation device |
| JP2010109708A (en) * | 2008-10-30 | 2010-05-13 | Fujitsu Ten Ltd | Triangular wave signal generating circuit, and radar device |
| CN203086416U (en) * | 2013-03-08 | 2013-07-24 | 滁州学院 | Power amplifier based on triangle generator |
| CN104038078A (en) * | 2014-06-25 | 2014-09-10 | 中国科学院上海应用物理研究所 | Scanning power source for generating exciting currents similar to triangular waves |
-
2020
- 2020-03-27 CN CN202010227972.XA patent/CN111404516B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3667055A (en) * | 1969-06-03 | 1972-05-30 | Iwatsu Electric Co Ltd | Integrating network using at least one d-c amplifier |
| US4516038A (en) * | 1982-11-19 | 1985-05-07 | Sundstrand Corporation | Triangle wave generator |
| JPH06310997A (en) * | 1993-04-27 | 1994-11-04 | Canon Inc | Triangular wave generating circuit |
| JP2006517367A (en) * | 2003-02-11 | 2006-07-20 | ビーエイチシー コンサルティング プロプライエタリー リミテッド | Low distortion class D amplifier using carrier reference signal symmetry modulation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111404516A (en) | 2020-07-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111404516B (en) | Symmetrical voltage triangular wave generator and implementation method thereof | |
| CN109983692A (en) | MEMS sensor | |
| US8098181B2 (en) | Attenuator circuit | |
| CN108398658B (en) | Automatic frequency control device and method | |
| CN104359455A (en) | Photodiode circuit based on background noise elimination and laser ranging system | |
| CN212726952U (en) | Amplifying circuit for converting microphone differential input into single-ended output | |
| CN109061279B (en) | AC sampling circuit | |
| JP2004312587A (en) | Single end differential signal converter | |
| CN116202700A (en) | Charge signal acquisition conditioning device and system | |
| CN104811181A (en) | Current-to-voltage conversion circuit with input bias and active power filtering effects and current-to-voltage conversion method | |
| CN203166875U (en) | Modular servo device and atomic frequency standard | |
| CN209767486U (en) | fast high-frequency current amplifier | |
| US11035894B2 (en) | Reducing noise in a capacitive sensor with a pulse density modulator | |
| CN104931996B (en) | The signal condition system of Larger Dynamic fast pulse in radiation detection | |
| JPH03220907A (en) | Sinusoidal wave generator | |
| CN204559542U (en) | A kind of current-to-voltage converting circuit with inputting biased and active power filtering | |
| WO2020057371A1 (en) | Voltage-to-pulse width modulation signal circuit | |
| CN106788326B (en) | Frequency self-tracking 90 DEG phase shifter | |
| CN103457571B (en) | A kind of SAW (Surface Acoustic Wave) oscillator based on multistrip coupler | |
| CN113162603A (en) | Miniaturized signal demodulation converter device | |
| CN209283211U (en) | A kind of difference signal generator | |
| CN103401538A (en) | Inertial acceleration transducer frequency control force feedback signal processing circuit | |
| CN219625576U (en) | Alternating current signal source generating device for cable detection | |
| CN114353775B (en) | Micromechanical gyroscope integrated circuit | |
| Jie et al. | Current mode third-order high-pass filter based on CC II |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230410 Address after: No. 150, Jinger Road, Daguanyuan, Shizhong District, Jinan City, Shandong Province Applicant after: Shandong Electric Power Marketing Center Applicant after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Applicant after: STATE GRID SHANDONG ELECTRIC POWER Co. Applicant after: STATE GRID CHONGQING ELECTRIC POWER CO. ELECTRIC POWER Research Institute Applicant after: STATE GRID CORPORATION OF CHINA Address before: 250002 Wang Yue Road, Ji'nan City, Shandong Province, No. 2000 Applicant before: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co. Applicant before: STATE GRID SHANDONG ELECTRIC POWER Co. Applicant before: STATE GRID CHONGQING ELECTRIC POWER CO. ELECTRIC POWER Research Institute Applicant before: STATE GRID CORPORATION OF CHINA |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |