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Multifunctional signal generator correction method and multifunctional signal generator

A technology for signal generators and calibration methods, applied to instruments, architectures with a single central processing unit, general-purpose stored program computers, etc., to achieve the effects of improving amplitude-frequency characteristics, saving design costs, and reducing logic resources

Pending Publication Date: 2021-09-24
杭州加速科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims at the disadvantage that the multifunctional signal generator in the prior art cannot correct the amplitude-frequency distortion well, and at the same time, the general signal generator intelligently processes regular waveform data, and cannot process irregular waveform data, and provides A multi-function signal generator calibration method and multi-function signal generator

Method used

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  • Multifunctional signal generator correction method and multifunctional signal generator
  • Multifunctional signal generator correction method and multifunctional signal generator
  • Multifunctional signal generator correction method and multifunctional signal generator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A multi-function signal generator correction method, including main control unit, FPGA unit, and DAC units;

[0043] The transmission of waveform data, the main control unit transmits wavefront data and configures the frequency of the wavelength data, and transmits the wave form file and frequency to the FPGA unit;

[0044] The correction of the waveform data, the FPGA unit stores and reads the received wavefront data, and calibrates the corrected waveform data to the DAC unit via a web correction algorithm.

[0045] According to the zero-order retention characteristics of the DAC, the amplitude correction is performed before the digital signal input DAC, which is corrected to the amplitude failure, thereby greatly improving the amplitude of the multi-function signal generator system output signal.

[0046]Also included with digital-to-analog conversion, the DAC unit converts the received waveform data into an analog waveform. The waveform data output by the FPGA unit is di...

Embodiment 2

[0051] Based on the first embodiment, the present embodiment also includes a fixed clock source, and a fixed clock source provides a fixed clock to the FPGA unit. By fixing the clock source, a stable clock can be provided so that the entire data is stabilized during transmission.

[0052] The FPGA unit includes a clock generation module, a wavelert storage module, a DDS control module, an amplitude correction module; the correction method of waveform data includes,

[0053] The FPGA unit is generated by the clock of the FPGA unit, and the fixed clock source is processed by the clock source to obtain the working clock of the FPGA unit;

[0054] The storage of wavefront data is stored by the wavelert-stored module to store the wavefront data for the wavelength formation of SDPRAM;

[0055] The acquisition of waveform data, the DDS control module obtains the read address of the waveform data according to the frequency configured by the main control unit, and the waveform data corresp...

Embodiment 3

[0059] Multifunctional signal generator, which includes a primary control unit, an FPGA unit, and a DAC unit, the main control unit transmits the waveform data and configures the frequency, and transmits the wavefield file and frequency to the FPGA unit; the FPGA unit performs the received wavefront data Store and read, and calibrate the corrected waveform data to the DAC unit via a magnitude frequency correction algorithm; the DAC unit converts the received waveform data into an analog waveform.

[0060] It also includes a fixed clock source that provides a fixed clock to the FPGA unit.

[0061] The FPGA unit includes clock generation modules, wavelert storage modules, DDS control modules, amplitude correction modules;

[0062] The clock generation module processes the clock provided by the fixed clock source to get the working clock of the FPGA unit;

[0063] The wavelert storage module stores the wavelength data for the wavelength table data;

[0064] The DDS control module per...

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Abstract

The invention relates to a multifunctional signal generator device, and discloses a multifunctional signal generator correction method and a multifunctional signal generator, wherein multifunctional signal generator comprises a main control unit, an FPGA unit and a DAC unit. The method comprises the following steps: transmission of wavetable data: a main control unit sends the wavetable data and configures the frequency of the wavetable data, and transmits a wavetable file and the frequency to the FPGA unit; and correction of the waveform data: the FPGA unit stores and reads the received wavetable data, corrects the wavetable data through an amplitude-frequency correction algorithm, and transmits the corrected waveform data to the DAC unit. According to the zero-order retention characteristic of the DAC, the amplitude correction is carried out before the digital signal is input into the DAC, so that the amplitude-frequency distortion is corrected, and the amplitude-frequency characteristic of the output signal of the multifunctional signal generator system is greatly improved.

Description

Technical field [0001] The present invention relates to a multifunctional signal generator device, which discloses a multifunctional signal generator correction method and a multi-function signal generator. Background technique [0002] The signal generator is a basic frequency source generator whether it is in the fields of teaching, electronic information engineering and research, and is widely used. With communication technology, satellite positioning system, precision mechanical control, and aerospace measurement and control, the requirements for measurement and control technology requirements, the stability, accuracy and frequency bandwidth of the signal generator are getting higher and higher. [0003] In the prior art AWG system, it is necessary to convert the input digital discrete waveform data to an analog consecutive signal. The DAC is used as a zero-order holder due to the unique frequency domain characteristics of the rectangular sampling, which will be inevitable. ...

Claims

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Application Information

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IPC IPC(8): G06F15/78
CPCG06F15/7839
Inventor 凌云陶春寿
Owner 杭州加速科技有限公司
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