Digital signal generator

A digital signal and generator technology, applied in the direction of electric pulse generator circuits, etc., can solve the problems of difficulty in generating different frequencies and can not meet the requirements of use, and achieve the effects of fast frequency conversion, simple structure and high stability.

Inactive Publication Date: 2014-03-12
DALIAN UNIV
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  • Abstract
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Problems solved by technology

Generally, the traditional signal generator adopts the resonance method, that is, a positive feedback loop with frequency selectivity is used to generate sinusoidal oscillation to obtain the required frequency signal, but it is difficult to generate a large number of different frequencies with the same stability and accuracy. The traditional lock The phase loop frequency synthesis signal source can no longer meet the requirements of use

Method used

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  • Digital signal generator

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Embodiment Construction

[0013] The present invention is applied in the student laboratory and is a simple digital signal generator based on digital frequency synthesis technology. The generator can realize various waveform outputs including sine wave, square wave and triangular wave, and the accuracy of the output signal is and high stability;

[0014] Such as figure 1 As shown, a digital signal generator includes a keyboard module for selecting output signal waveforms and frequencies, a control module connected to the keyboard module, a frequency synthesis module connected to the control module, and a frequency synthesis module connected to the frequency A low-pass filter module connected to the synthesis module, a signal output module connected to the low-pass filter module; the control module is also connected to the display module; the control module is also connected to the alarm module, and the alarm module It is used to generate an audible and visual alarm when the input information of the ke...

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Abstract

The invention discloses a digital signal generator which comprises a keyboard module, a control module, a frequency synthesis module, a low-pass filtering module and a signal output module. The keyboard module is used for selecting waveforms and frequency of output signals, the control module is connected with the keyboard module, the frequency synthesis module is connected with the control module, the low-pass filtering module is connected with the frequency synthesis module, the signal output module is connected with the low-pass filtering module, and the control module is further connected with a display module. The digital signal generator can realize outputting of various waveforms including sine waves, square waves and triangular waves, and is high in accuracy and stability in signal outputting, simple in structure, low in cost and capable of being applied to student laboratories.

Description

technical field [0001] The invention relates to a signal generator, in particular to a digital signal generator. Background technique [0002] A signal generator is a commonly used signal source, widely used in electronic measurement, automatic control and engineering design, etc., to generate electrical test signals of specific parameters required by the circuit under test. When testing, researching or adjusting electronic circuits and equipment, in order to measure some electrical parameters of the circuit, such as measuring frequency response, noise figure, and voltmeter calibration, etc., it is required to provide electrical signals that meet the specified technical conditions to simulate in practice. Stimulus signal for the device under test used in operation. When it is required to measure the steady-state characteristics of the system, it is necessary to use a sinusoidal signal source with known amplitude and frequency. When testing the transient characteristics of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K3/02
Inventor 汪祖民张红梅
Owner DALIAN UNIV
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