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Fast response mixed signal generator and implementation method thereof

A mixed-signal, fast-response technology, used in digital function generators, instruments, electrical and digital data processing, etc., can solve the problems of increased waveform distortion of superimposed signals, and achieve less waveform data, fast response time, and easy program control. Effect

Inactive Publication Date: 2016-12-07
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the increase of instruments will bring a lot of inconvenience. Each instrument has different sources. As time increases, the distortion of the superimposed signal waveform will also increase.

Method used

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  • Fast response mixed signal generator and implementation method thereof
  • Fast response mixed signal generator and implementation method thereof
  • Fast response mixed signal generator and implementation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] combine figure 1 The mixed signal generator with fast response in this embodiment includes an interface circuit, a single-chip microcomputer (MCU), a low-pass filter, an FPGA unit, and a DAC unit. A power supply circuit, a JTAG unit, a crystal oscillator unit and a DAC unit, and the DAC unit is electrically connected to a low-pass filter.

Embodiment approach

[0029] combine figure 2 , is the first preferred embodiment of the present invention, the mixed signal is formed by superposition of 28 sinusoidal components, 2 pulse components and 2 triangular components, a total of 32 components, and its waveform generation circuit consists of a single chip FPGA and an analog circuit composition. In the FPGA, the microprocessor sets all component parameters through the interface circuit. The FPGA selects the Cyclone III generation EP3C55F484C6 chip, the external crystal oscillator clock frequency is 40MHz, and the system clock Fsys is 400MHz after frequency multiplication by the phase-locked loop.

[0030] image 3 for figure 2 The topology structure diagram of the data synthesis in the data synthesis part, the data synthesis of the entire waveform amplitude is completed inside the FPGA. Multiple waveform data pass through the multiplier first, and then pass through the adder together. This process completes the synthesis of the wavefo...

Embodiment 2

[0036] combine Figure 7 , is the second preferred implementation mode of the present invention, and its working principle is the same as that of the first implementation mode, except that the parameters of components used and the technical indicators of function signals are different.

[0037] exist Figure 7 Among them, the arbitrary waveform signal with 8 components of the mixed signal, according to the Fourier principle, any signal can be represented by a sinusoidal signal, that is, there are 8 sinusoidal components in total. The programmable logic device FPGA uses Cyclone IV generation EP4CE115F29C7N, and Fsys is the frequency of the external crystal oscillator 50MHz, the system clock Fsys is 300MHz after frequency multiplication by phase-locked loop.

[0038] Figure 7 In the shown control logic unit, the amplitude word is 12bit, the frequency word is 32Bit, the phase word is 12Bit, and the pulse width word is 12Bit. The amplitude resolution is 0.1%, the frequency res...

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Abstract

The invention provides a fast response mixed signal generator and an implementation method thereof. The fast response mixed signal generator comprises an interface circuit, a micro controller unit (MCU), a low-pass filter, an FPGA unit and a DAC unit, wherein the micro controller unit is electrically connected with the FPGA unit, a keyboard display circuit and a reset unit respectively; the FPGA unit is electrically connected with a power supply circuit, a JTAG unit, a crystal oscillation unit and the DAC unit respectively; the DAC unit is electrically connected with the low-pass filter. The fast response mixed signal generator overcomes defects in the prior art, and has the characteristics that the resultant velocity is high, the waveform data is less, the integration is easy, the circuit is simple, all parameters are set independently, and the parameters can be changed conveniently and quickly.

Description

(1) Technical field [0001] The invention relates to a mixed signal generator, in particular to a fast response mixed signal generator and its realization method. (2) Background technology [0002] Multi-component mixed signal generators are widely used in scientific experiments, electronic circuits, automatic control and other fields. In addition, they are also used in medical fields such as spectrum therapy instruments, electrocardiogram diagnosis, etc., and non-electrical measurement fields. At present, the circuit for synthesizing multi-component signals can be divided into digital circuit part and analog circuit part in terms of its hardware composition. The digital circuit shares one or more programmable logic devices and is composed of control logic, waveform memory, phase accumulator and other units. The digital circuit part outputs waveform data to the analog circuit part at a relatively high rate. The analog circuit part is composed of waveform conversion DAC, ampl...

Claims

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Application Information

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IPC IPC(8): G06F1/02
CPCG06F1/022
Inventor 童子权邓红玉任丽军盖建新
Owner HARBIN UNIV OF SCI & TECH
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