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Low frequency function generator

A function generator, low-frequency technology, applied in the field of low-frequency function generators, can solve the problems of frequency accuracy, bandwidth, waveform type and program control can not meet the needs of practical applications, to achieve stable waveform frequency, wide output frequency range, and realize the structure. simple effect

Inactive Publication Date: 2015-09-09
PANZHIHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the instruments that can be seen on the market can no longer meet the needs of many practical applications in terms of frequency accuracy, bandwidth, waveform types and program control.

Method used

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  • Low frequency function generator
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Embodiment

[0031] The signal generator is a frequently used device. The traditional design method consisting of purely physical devices has many disadvantages, such as: large volume, heavy weight, inconvenient movement, large signal distortion, and too rigid waveform shape adjustment. It cannot meet the user's requirements for accuracy, portability, stability, etc. In this example, the single-chip microcomputer AT89S52 and the 8-bit D / A conversion chip DAC0832 are used to jointly realize the generation of four commonly used waveforms: square wave, sawtooth wave, triangle wave, and sine wave. According to the design requirements, program the frequency and amplitude of various waveforms, and load the written program into the program memory of the single-chip microcomputer. During the running of the program, when a command from the outside is received and a certain waveform needs to be output, then the corresponding interrupt service subroutine and waveform generation program are called. o...

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Abstract

The invention relates to a signal generator, and provides a low frequency function generator, aiming to solve the problems of signal generators based on current technology such as big size, overweight, lack of mobility, severe signal distortion, inflexibility of the waveform adjustment, etc. The low frequency function generator includes a man-machine interaction module, a reset module, an oscillation starting module, a power module, a processing module, a DAC module, an operational amplifier module and a waveform output module. The man-machine interaction module, the reset module, the oscillation starting module and the power module are all in connection with the processing module. The processing module is in connection with the DAC module. The DAC module is in connection with the operational amplifier module. The operational amplifier module is in connection with the waveform output module. The generator is portable, has a simple structure, and can perform display through a display module. The man-machine interaction module can switch among a plurality of kinds of waveforms, and is suitable for a low frequency function generator.

Description

technical field [0001] The invention relates to a signal generator, in particular to a low-frequency function generator based on a single-chip microcomputer. Background technique [0002] A signal generator is an instrument that generates electrical test signals of required parameters. Because of its wide range of applications, various types, and different characteristics, the classification is not consistent. According to the signal waveform, it can be divided into four categories: sine signal, function signal, pulse signal and random signal generator; according to the frequency coverage, it can be divided into low frequency signal generator, high frequency signal generator and microwave signal generator; according to the output level The adjustable range and stability are divided into simple signal generators, standard signal generators and power signal generators; according to the way of frequency change, they are divided into tuning signal generators, sweeping signal ge...

Claims

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Application Information

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IPC IPC(8): G05B19/042
CPCG05B19/0426
Inventor 任佳
Owner PANZHIHUA UNIV
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