Digital signal generator

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 ...

AI Technical Summary

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

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