CN205301915U

CN205301915U - Sinusoidal signal generator based on STC89C52 singlechip

Info

Publication number: CN205301915U
Application number: CN201620016478.8U
Authority: CN
Inventors: 戴圣伟; 李明; 吕锋; 胡嘉锋; 袁清山
Original assignee: Hunan University of Technology
Current assignee: Hunan University of Technology
Priority date: 2016-01-11
Filing date: 2016-01-11
Publication date: 2016-06-08
Anticipated expiration: 2026-01-11

Abstract

The utility model provides a sinusoidal signal generator based on STC89C52 singlechip mainly includes the minimum system of STC89C52 singlechip, power module, DDS signal synthesis module, matrix keyboard module, filter amplifier module, display module, minimum system turns into DDS signal synthesis module control word with matrix key entry key value through the STC89C52 singlechip, and control DDS signal synthesis module produces required sinusoidal signal, carries on exporting high -quality sinusoidal signal after low pass filter enlargies with fortune through the filter amplifier module again, and the sinusoidal signal frequency is exported to the simultaneous display pair of module and the range shows.

Description

A kind of sinusoidal signal generator based on STC89C52 single-chip microcomputer

Technical field

This utility model relates to a kind of sinusoidal signal generator based on STC89C52 single-chip microcomputer, relates generally to a kind of signal generator,

For instrument and meter.

Background technology

Development along with science and technology, signal generator be it is also proposed higher requirement by user, for low grade products, require that use is easy to operate, price is low, and for medium and high-grade goods, then require high accuracy, high stability, except the function that usual signal generator has, also there is automatic gear change function, show other functions such as function in real time, what these targets had has been carried out or part realization, but really perfectly to realize these targets, for manufacturer, a lot of technology are also had to capture, a lot of difficulties are also had to overcome, rather than seem apparently to develop into perfection, quick development due to microelectric technique and computer technology, signal generator have also been obtained certain development, output accuracy and degree of stability are also in continuous raising, reference frequency output is constantly widened, function is being continuously increased, sinusoidal signal generator no exception, also in continuous development, along with constantly bringing forth new ideas and the progressive development that greatly have stimulated DDS technology of social need, microelectric technique and computer technology.

Summary of the invention

A kind of sinusoidal signal generator based on STC89C52 single-chip microcomputer, mainly includes STC89C52 single-chip minimum system, power module, DDS signal synthesizing module, matrix keyboard module, filter and amplification module, display module; By STC89C52 single-chip minimum system, matrix keyboard is inputted key assignments and be converted into DDS signal synthesizing module control word, control DDS signal synthesizing module and produce required sinusoidal signal, carrying out the sinusoidal signal of outputting high quality after low-pass filtering and amplifier are amplified then through filter and amplification module, output sinusoidal signal frequency and amplitude are displayed by display module simultaneously.

Accompanying drawing explanation

Fig. 1 is this utility model entire block diagram;

Fig. 2 is this utility model STC89C52 single-chip minimum system figure;

Fig. 3 is this utility model power module figure;

Fig. 4 is this utility model DDS signal synthesizing module figure;

Fig. 5 is this practicality matrix module figure;

Fig. 6 is this utility model filter and amplification module map.

Detailed description of the invention

Fig. 1 is entire block diagram, mainly includes STC89C52 single-chip minimum system, power module, DDS signal synthesizing module, matrix keyboard module, filter and amplification module, display module;Power module is connected with STC89C52 single-chip minimum system, powers for whole circuit; STC89C52 single-chip minimum system is connected with matrix keyboard module, produces the control word that keyboard key assignments is corresponding; STC89C52 single-chip minimum system is connected with DDS signal synthesizing module, controls DDS chip and produces the sinusoidal signal that control word is corresponding; STC89C52 single-chip minimum system is connected with display module, in real time display output sinusoidal signal frequency and amplitude; DDS signal synthesizing module is connected with filter and amplification module, the sinusoidal signal that DDS chip produces carries out low-pass filtering and amplifier is amplified, the sinusoidal signal of outputting high quality.

Fig. 2 is STC89C52 single-chip minimum system figure, mainly includes reset circuit and crystal oscillating circuit, and reset circuit is mainly made up of button, resistance and electric capacity, pushes button, and high level resets; Crystal oscillating circuit is mainly made up of crystal oscillator and electric capacity, and crystal oscillating circuit provides operating frequency for STC89C52 single-chip microcomputer.

Fig. 3 is power module figure, and power module mainly by after 220V alternating current blood pressure lowering, rectifying and wave-filtering, obtains stable 5V through LM7805 voltage stabilizing, powers for whole circuit.

Fig. 4 is DDS signal synthesizing module figure, and main employing DDS signal syntheses chip AD9852, under STC89C52 Single-chip Controlling, synthesis chip AD9852 synthesizes the sinusoidal signal that control word is corresponding.

Fig. 5 is matrix keyboard module map, and matrix keyboard module mainly adopts 4*4 matrix keyboard, by being connected with STC89C52 single-chip microcomputer P1 mouth, the key assignments of input through keyboard converts under the control of STC89C52 single-chip microcomputer the control word of correspondence to.

Fig. 6 is filter and amplification module map, and the main amplifier THS300AHV of employing and a certain proportion of resistance constitute amplifying circuit, adopt the LC low-pass filter circuit of second order simultaneously, utilize inductance and capacitor filtering, obtain required sinusoidal signal.

Claims

1., based on a sinusoidal signal generator for STC89C52 single-chip microcomputer, mainly include STC89C52 single-chip minimum system, power module, DDS signal synthesizing module, matrix keyboard module, filter and amplification module, display module; Power module is connected with STC89C52 single-chip minimum system, powers for whole circuit; STC89C52 single-chip minimum system is connected with matrix keyboard module, produces the control word that keyboard key assignments is corresponding; STC89C52 single-chip minimum system is connected with DDS signal synthesizing module, controls DDS chip and produces the sinusoidal signal that control word is corresponding; STC89C52 single-chip minimum system is connected with display module, in real time display output sinusoidal signal frequency and amplitude; DDS signal synthesizing module is connected with filter and amplification module, the sinusoidal signal that DDS chip produces carries out low-pass filtering and amplifier is amplified, the sinusoidal signal of outputting high quality.

2. a kind of sinusoidal signal generator based on STC89C52 single-chip microcomputer according to claim 1, it is characterized in that STC89C52 single-chip minimum system mainly includes reset circuit and crystal oscillating circuit, reset circuit is mainly made up of button, resistance and electric capacity, pushes button, and high level resets; Crystal oscillating circuit is mainly made up of crystal oscillator and electric capacity, and crystal oscillating circuit provides operating frequency for STC89C52 single-chip microcomputer; Power module mainly by after 220V alternating current blood pressure lowering, rectifying and wave-filtering, obtains stable 5V through LM7805 voltage stabilizing, powers for whole circuit; DDS signal synthesizing module mainly adopts DDS signal syntheses chip AD9852, and under STC89C52 Single-chip Controlling, synthesis chip AD9852 synthesizes the sinusoidal signal that control word is corresponding;Matrix keyboard module mainly adopts 4*4 matrix keyboard, by being connected with STC89C52 single-chip microcomputer P1 mouth, the key assignments of input through keyboard converts under the control of STC89C52 single-chip microcomputer the control word of correspondence to; Filter and amplification module mainly adopts amplifier THS300AHV and a certain proportion of resistance to constitute amplifying circuit, adopts the LC low-pass filter circuit of second order simultaneously, utilizes inductance and capacitor filtering, obtains required sinusoidal signal.