CN116909350A - Arbitrary waveform output circuit - Google Patents
Arbitrary waveform output circuit Download PDFInfo
- Publication number
- CN116909350A CN116909350A CN202310761068.0A CN202310761068A CN116909350A CN 116909350 A CN116909350 A CN 116909350A CN 202310761068 A CN202310761068 A CN 202310761068A CN 116909350 A CN116909350 A CN 116909350A
- Authority
- CN
- China
- Prior art keywords
- output
- circuit
- waveform
- programmable logic
- data
- 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.)
- Pending
Links
- 230000003750 conditioning effect Effects 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims description 9
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 230000005284 excitation Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/02—Digital function generators
- G06F1/022—Waveform generators, i.e. devices for generating periodical functions of time, e.g. direct digital synthesizers
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Amplifiers (AREA)
Abstract
The invention belongs to the technical field of avionics, and particularly relates to an arbitrary waveform output circuit which can realize real-time adjustment of signal waveforms, amplitude values and frequencies and output arbitrary waveforms, such as audio output and RVDT excitation (7V and 1.8 kHz) output. The arbitrary waveform output circuit comprises a processor, a programmable logic circuit, a signal conditioning circuit and a filter circuit which are electrically connected in sequence. The invention has high universality while ensuring the amplitude and frequency precision of the output signal.
Description
Technical Field
The invention belongs to the technical field of avionics, and particularly relates to an arbitrary waveform output circuit.
Background
In the field of avionics, two design methods are generally adopted for the output of excitation signals, one is to build an oscillating circuit by using an amplifier; another is to use a dedicated signal output chip such as a DDS chip, a DA conversion chip, etc. The first mode has the defects that the oscillating circuit is usually a fixed waveform such as a sine wave, a square wave, a sawtooth wave and the like, the signal amplitude and the frequency precision are not high, and the second mode needs to adopt a special chip and has low universality.
Disclosure of Invention
In view of this, the invention provides an arbitrary waveform output circuit, which has high versatility while guaranteeing the amplitude and frequency accuracy of the output signal.
In order to achieve the technical purpose, the invention adopts the following specific technical scheme:
an arbitrary waveform output circuit comprises a processor, a programmable logic circuit, a signal conditioning circuit and a filter circuit which are electrically connected in sequence; wherein:
the processor is used for generating waveform data; the programmable logic circuit modulates the output waveform according to the waveform data, and realizes the output of any waveform by adjusting the width of the high level and the low level of the output, adjusting the amplitude of the output signal and the frequency of the output signal in a multi-point combination output mode; the signal conditioning circuit is used for carrying out summation operation and amplification on the multi-point output signals of the programmable logic circuit; the filter circuit is used for filtering the output signal of the signal conditioning circuit, filtering high-frequency noise components and outputting the filtered high-frequency noise components.
Further, after the processor generates waveform data, the waveform data is written into the programmable logic circuit data buffer area 0 and the buffer area 1 alternately according to the period.
Further, the programmable logic circuit comprises a data buffer and waveform output logic; the waveform output logic modulates waveform data of the data buffer, and adjusts amplitude and frequency of an output signal by adjusting high-low level width of waveform of the waveform data.
Furthermore, the waveform output logic adopts a multi-point combination output mode, and is used for improving the output point number and the data bit width index.
Furthermore, the signal conditioning circuit outputs 2.5V reference voltage according to the control of the high level and the low level of the programmable logic circuit, and performs summation operation and amplification on the multi-point output signals.
Further, the filtering circuit filters out high-frequency noise components in the multi-point output signal based on a second-order Butterworth filter.
Compared with the prior art, the invention has the following technical characteristics: programmable logic devices are used in large numbers in products; the invention can realize random waveform output by a programmable logic device on the basis of the existing common hardware, and simultaneously, the parameters such as waveform amplitude, waveform frequency and the like can be adjusted.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
Fig. 1 is a schematic diagram of an arbitrary waveform output circuit according to an embodiment of the present invention.
Detailed Description
Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
Other advantages and effects of the present disclosure will become readily apparent to those skilled in the art from the following disclosure, which describes embodiments of the present disclosure by way of specific examples. It will be apparent that the described embodiments are merely some, but not all embodiments of the present disclosure. The disclosure may be embodied or practiced in other different specific embodiments, and details within the subject specification may be modified or changed from various points of view and applications without departing from the spirit of the disclosure. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.
It is noted that various aspects of the embodiments are described below within the scope of the following claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present disclosure, one skilled in the art will appreciate that one aspect described herein may be implemented independently of any other aspect, and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. In addition, such apparatus may be implemented and/or such methods practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should also be noted that the illustrations provided in the following embodiments merely illustrate the basic concepts of the disclosure by way of illustration, and only the components related to the disclosure are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided in order to provide a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
In one embodiment of the invention, an arbitrary waveform output circuit is provided, which realizes real-time adjustment of signal waveform, amplitude and frequency, and outputs arbitrary waveforms, such as audio output and RVDT excitation (7V, 1.8 kHz) output. As shown in fig. 1, the arbitrary waveform output circuit of the present embodiment includes a processor, a programmable logic circuit, a signal conditioning circuit, and a filter circuit electrically connected in sequence; wherein:
the processor is used for generating waveform data; the programmable logic circuit modulates the output waveform according to the waveform data, and realizes the output of any waveform by adjusting the width of the high level and the low level of the output, adjusting the amplitude of the output signal and the frequency of the output signal in a multi-point combination output mode; the signal conditioning circuit is used for carrying out summation operation and amplification on the multi-point output signals of the programmable logic circuit; the filter circuit is used for filtering the output signal of the signal conditioning circuit, filtering high-frequency noise components and outputting the filtered high-frequency noise components.
In this embodiment, after the processor generates waveform data, the waveform data is written alternately into the programmable logic circuit data buffer 0 and the buffer 1 in cycles.
In this embodiment, the programmable logic circuit includes a data buffer and waveform output logic; the waveform output logic modulates waveform data of the data buffer, and adjusts the amplitude and frequency of the output signal by adjusting the high-low level width of the waveform data. Taking an audio signal as an example, the number of output points per second is required to be 16k, the audio data is 14 bits, and the programmable logic device of the embodiment operates at a main frequency of 16k×16384= 262.144MHz to control the high and low level width of each output point.
In this embodiment, the waveform output logic adopts a multi-point combination output mode, so as to improve the output point number and the data bit width index.
In this embodiment, the signal conditioning circuit outputs a 2.5V reference voltage according to the high-low level control output by the programmable logic circuit, and performs summation operation and amplification on the multi-point output signal.
In this embodiment, the filtering circuit filters out the high-frequency noise component in the multi-point output signal based on a second-order butterworth filter.
The foregoing is merely specific embodiments of the disclosure, but the protection scope of the disclosure is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the disclosure are intended to be covered by the protection scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (6)
1. An arbitrary waveform output circuit is characterized by comprising a processor, a programmable logic circuit, a signal conditioning circuit and a filter circuit which are electrically connected in sequence; wherein:
the processor is used for generating waveform data; the programmable logic circuit modulates the output waveform according to the waveform data, and realizes the output of any waveform by adjusting the width of the high level and the low level of the output, adjusting the amplitude of the output signal and the frequency of the output signal in a multi-point combination output mode; the signal conditioning circuit is used for carrying out summation operation and amplification on the multi-point output signals of the programmable logic circuit; the filter circuit is used for filtering the output signal of the signal conditioning circuit, filtering high-frequency noise components and outputting the filtered high-frequency noise components.
2. The arbitrary waveform output circuit as claimed in claim 1, wherein after the processor generates waveform data, the waveform data is written alternately in the programmable logic circuit data buffer 0 and the buffer 1 in cycles.
3. The arbitrary waveform output circuit of claim 2 wherein the programmable logic circuit comprises a data buffer and waveform output logic; the waveform output logic modulates waveform data of the data buffer, and adjusts amplitude and frequency of an output signal by adjusting high-low level width of waveform of the waveform data.
4. The arbitrary waveform output circuit of claim 3 wherein the waveform output logic employs a multi-point combination output scheme for increasing output point count and data bit width indicator.
5. The arbitrary waveform output circuit according to claim 4, wherein the signal conditioning circuit outputs a 2.5V reference voltage according to a high-low level control output of the programmable logic circuit, and performs summation operation and amplification on the multi-point output signal.
6. The arbitrary waveform output circuit of claim 5 wherein the filtering circuit filters out high frequency noise components in the multi-point output signal based on a second order butterworth filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310761068.0A CN116909350A (en) | 2023-06-26 | 2023-06-26 | Arbitrary waveform output circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310761068.0A CN116909350A (en) | 2023-06-26 | 2023-06-26 | Arbitrary waveform output circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116909350A true CN116909350A (en) | 2023-10-20 |
Family
ID=88367507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310761068.0A Pending CN116909350A (en) | 2023-06-26 | 2023-06-26 | Arbitrary waveform output circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116909350A (en) |
-
2023
- 2023-06-26 CN CN202310761068.0A patent/CN116909350A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN116909350A (en) | Arbitrary waveform output circuit | |
| CN117147964A (en) | Testing circuit and testing method for center frequency of band-pass filter | |
| CN206460695U (en) | A kind of analog waveform generator experiment device for teaching | |
| CN212514870U (en) | Low-voltage signal source | |
| CN111693837B (en) | Low-voltage signal source | |
| CN103595373B (en) | A kind of nine component mixed signal generators and nine component mixed signal method for generation | |
| CN204559529U (en) | A kind of signal conditioning circuit for SAW (Surface Acoustic Wave) oscillator output signal | |
| CN112213620B (en) | Harmonic distortion test circuit of communication device | |
| CN208092129U (en) | A kind of amplitude versus frequency characte tester based on FPGA and ARM | |
| JP2008292399A (en) | Inspection system for capacitor | |
| CN103716019B (en) | Sinusoidal wave generation circuit and audio shield | |
| KR101836705B1 (en) | Apparatus and method for generating sine wave | |
| CN107773240A (en) | A kind of excitation source circuit based on Differential OPAMP | |
| CN105227182B (en) | A kind of RF local oscillator circuit for radio general measuring instrument | |
| CN107276568A (en) | A kind of jittered device of train pulse trailing edge | |
| CN221303419U (en) | Detection device for total harmonic distortion plus measurement noise | |
| CN105262485B (en) | A kind of wideband generative circuit for radio general measuring instrument RF local oscillator circuit | |
| CN117742444A (en) | High-performance low-frequency broadband vector signal generating circuit and method | |
| CN110739914A (en) | Rotary transformer excitation circuit based on sine wave | |
| CN111638390A (en) | Sweep frequency electric field generator | |
| CN110794208A (en) | Broadband rapid modulation domain frequency measurement method based on digital phase calculation | |
| CN221263783U (en) | Raman pulse forming device | |
| CN110568259A (en) | Remote amplitude-frequency characteristic measuring device | |
| CN202772855U (en) | TDR step pulse generator | |
| CN210807202U (en) | Test circuit and device of band-pass filter |
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 |