CN205844830U

CN205844830U - A kind of arbitrarily signal generating device based on DSP

Info

Publication number: CN205844830U
Application number: CN201620799738.3U
Authority: CN
Inventors: 孙晓云
Original assignee: Xian University of Science and Technology
Current assignee: Xian University of Science and Technology
Priority date: 2016-07-27
Filing date: 2016-07-27
Publication date: 2016-12-28
Anticipated expiration: 2026-07-27

Abstract

The utility model discloses a kind of arbitrarily signal generating device based on DSP, including DSP module with for the low pass filter of filter high frequency noise, the input of described DSP module is connected to the keyboard circuit for setting signal waveform, frequency and amplitude, the outfan of described DSP module is connected to display circuit and for converting digital signals into the D/A modular converter of analogue signal, and the described outfan of D/A modular converter connects with the input of low pass filter.This utility model simple in construction, reasonable in design, use DSP module as computing unit, carry out mathematical calculation to needing the signal produced, the arbitrary signal of assigned frequency and amplitude can be produced, use easy to operate, practical, using effect is good, it is simple to promote the use of.

Description

A kind of arbitrarily signal generating device based on DSP

Technical field

This utility model belongs to test instrunment technical field, is specifically related to a kind of arbitrarily signal generating device based on DSP.

Background technology

Along with China's economy and the development of science and technology, corresponding test instrunment and means of testing be it is also proposed higher wanting Ask, AWG (Arbitrary Waveform Generator) as in test instrunment to closing a main class, be widely used in electronic surveying, system debug, religion Learn and scientific research, be the optimal instrument of signal simulation experiment.Along with science and technology constantly improves, test object is also enriched.Therefore, right Functional requirement in signal generator is more and more higher the most comprehensive, and therefore exploitation AWG (Arbitrary Waveform Generator) is significant.

Mostly existing signal generator is traditional analog signal generator, has that volume is big, inconvenient operation, signal wave The features such as form quality amount is the most accurate, it is impossible to fully meet market demand.It is thus desirable to the arbitrary signal that a kind of volume is little, precision is good Generator, can produce the arbitrary signal of assigned frequency and amplitude, simple in construction, reasonable in design, uses easy to operate, practicality By force, using effect is good, it is simple to promote the use of.

Utility model content

Technical problem to be solved in the utility model is for above-mentioned deficiency of the prior art, it is provided that a kind of based on The arbitrarily signal generating device of DSP, its simple in construction, reasonable in design, the arbitrary signal of assigned frequency and amplitude can be produced, use Easy to operate, practical, using effect is good, it is simple to promote the use of.

For solving above-mentioned technical problem, the technical solution adopted in the utility model is: a kind of arbitrary signal based on DSP is sent out Raw device, it is characterised in that: include DSP module and the low pass filter for filter high frequency noise, the input of described DSP module Being connected to the keyboard circuit for setting signal waveform, frequency and amplitude, the outfan of described DSP module is connected to display circuit and use In converting digital signals into the D/A modular converter of analogue signal, the outfan of described D/A modular converter and low pass filter Input connects.

Above-mentioned a kind of based on DSP arbitrarily signal generating device, it is characterised in that: described D/A modular converter includes chip REFLNAB pin and the REFLNCD pin of TLV5614, described chip TLV5614 all connect with+2.5V reference voltage source, described Chip TLV5614'sPin connects with+3.3V power end, the AVDD pin of described chip TLV5614 and+5V power end phase Connect, described chip TLV5614'sPin, DIN pin, SCLK pin,Pin and FS pin all with DSP module phase Connect.

Above-mentioned a kind of based on DSP arbitrarily signal generating device, it is characterised in that: described low pass filter includes chip MAX293, the V+ pin of described chip MAX293 connects with+5V power end, the V-pin of described chip MAX293 and-5V power supply End connects, and the IN pin of described chip MAX293 connects with the VOUTA pin of chip TLV5614, the CLK of described chip MAX293 Pin connects with DSP module.

Above-mentioned a kind of based on DSP arbitrarily signal generating device, it is characterised in that: described keyboard circuit is 4 × 4 matrix keys Dish circuit.

Above-mentioned a kind of based on DSP arbitrarily signal generating device, it is characterised in that: described DSP module is chip TMS320VC5509A。

This utility model compared with prior art has the advantage that

1, hardware circuit of the present utility model is simple, reliable, good stability, and precision is high.

2, this utility model uses DSP module as waveshape module, can produce the sine of assigned frequency and amplitude Signal, triangular signal, square-wave signal, sawtooth waveforms and white Gaussian noise signal, it is achieved and use easy to operate.

3, this utility model is reasonable in design, and volume is little, low cost.

In sum, this utility model simple in construction, reasonable in design, any letter of assigned frequency and amplitude can be produced Number, use easy to operate, practical, using effect is good, it is simple to promote the use of.

Below by drawings and Examples, the technical solution of the utility model is described in further detail.

Accompanying drawing explanation

Fig. 1 is schematic block circuit diagram of the present utility model.

Fig. 2 is the circuit theory diagrams of this utility model DSP module.

Fig. 3 is the circuit theory diagrams of this utility model D/A modular converter.

Fig. 4 is the circuit theory diagrams of this utility model low pass filter.

Fig. 5 is the circuit theory diagrams of this utility model keyboard circuit.

Description of reference numerals:

1 DSP module；2 keyboard circuits；3 display circuits；

4 D/A modular converters；5 low pass filters.

Detailed description of the invention

As it is shown in figure 1, this utility model includes DSP module 1 and the low pass filter 5 for filter high frequency noise, described The input of DSP module 1 is connected to the keyboard circuit 2 for setting signal waveform, frequency and amplitude, the output of described DSP module 1 It is terminated with display circuit 3 and for converting digital signals into the D/A modular converter 4 of analogue signal, described D/A modular converter 4 Outfan connect with the input of low pass filter 5.

As in figure 2 it is shown, in the present embodiment, described DSP module 1 is chip TMS320VC5509A.

As it is shown on figure 3, in the present embodiment, described D/A modular converter 4 includes chip TLV5614, described chip TLV5614 REFLNAB pin and REFLNCD pin all connect with+2.5V reference voltage source, described chip TLV5614'sPin with+ 3.3V power end connects, and the AVDD pin of described chip TLV5614 connects with+5V power end, described chip TLV5614'sPin, DIN pin, SCLK pin,Pin and FS pin respectively with the GPIO0 pin of chip TMS320VC5509A, DX0 pin, CLKX0 pin, GPIO1 pin and FSX0 pin connect.

As shown in Figure 4, in the present embodiment, described low pass filter 5 includes chip MAX293, the V+ of described chip MAX293 Pin connects with+5V power end, and the V-pin of described chip MAX293 connects with-5V power end, the IN of described chip MAX293 Pin connects with the VOUTA pin of chip TLV5614, and the CLK pin of described chip MAX293 is with chip TMS320VC5509A's GPIO3 pin connects.

As it is shown in figure 5, in the present embodiment, described keyboard circuit 2 is 4 × 4 matrix keyboard circuits.

When being embodied as, setting signal waveform shape, frequency and amplitude by keyboard circuit 2, DSP module 1 calculates and is wanted Producing the waveform parameter of signal, then waveform parameter is transferred to D/A modular converter 4 and display circuit 3, D/ by DSP module 1 simultaneously The digital signal of the waveform parameter received is converted to analogue signal by A modular converter 4, is then sent to low pass filter 5, low Bandpass filter 5 filters the high-frequency noise in waveform parameter analogue signal, and waveform parameter is demonstrated by display circuit 3 with written form Come.

The above, be only embodiment of the present utility model, not impose any restrictions this utility model, every according to this Any simple modification, change and the equivalent structure change that above example is made by utility model technical spirit, all still falls within In the protection domain of technical solutions of the utility model.

Claims

1. an arbitrarily signal generating device based on DSP, it is characterised in that: include DSP module (1) and for filter high frequency noise Low pass filter (5), the input of described DSP module (1) be connected to for setting signal waveform, frequency and amplitude keyboard electricity Road (2), the outfan of described DSP module (1) is connected to display circuit (3) and for converting digital signals into the D/ of analogue signal A modular converter (4), the outfan of described D/A modular converter (4) connects with the input of low pass filter (5).

2. according to a kind of based on DSP the arbitrarily signal generating device described in claim 1, it is characterised in that: described D/A modulus of conversion Block (4) includes chip TLV5614, and the REFLNAB pin of described chip TLV5614 and REFLNCD pin are all electric with+2.5V benchmark Potential source connects, described chip TLV5614'sPin connects with+3.3V power end, the AVDD pin of described chip TLV5614 Connect with+5V power end, described chip TLV5614'sPin, DIN pin, SCLK pin,Pin and FS pin All connect with DSP module (1).

3. according to a kind of based on DSP the arbitrarily signal generating device described in claim 2, it is characterised in that: described low-pass filtering Device (5) includes that chip MAX293, the V+ pin of described chip MAX293 connect with+5V power end, the V-of described chip MAX293 Pin connects with-5V power end, and the IN pin of described chip MAX293 connects with the VOUTA pin of chip TLV5614, described core The CLK pin of sheet MAX293 connects with DSP module (1).

4. according to a kind of based on DSP the arbitrarily signal generating device described in claim 1, it is characterised in that: described keyboard circuit (2) it is 4 × 4 matrix keyboard circuits.

5. according to a kind of based on DSP the arbitrarily signal generating device described in claim 1, it is characterised in that: described DSP module (1) it is chip TMS320VC5509A.