CN207124736U - A kind of high-precision audio pulse circuit - Google Patents

A kind of high-precision audio pulse circuit Download PDF

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Publication number
CN207124736U
CN207124736U CN201721036558.0U CN201721036558U CN207124736U CN 207124736 U CN207124736 U CN 207124736U CN 201721036558 U CN201721036558 U CN 201721036558U CN 207124736 U CN207124736 U CN 207124736U
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China
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circuit
machine unit
single machine
output end
mouths
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Expired - Fee Related
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CN201721036558.0U
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Chinese (zh)
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杨日权
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Guangdong Swarc Technology Co Ltd
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Guangdong Swarc Technology Co Ltd
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Abstract

It the utility model is related to tonepulse technical field, a kind of more particularly to high-precision audio pulse circuit, use using SCM system as key control unit, using fourth-order band-pass filter circuit, high-accuracy and constant potential source, high precision clock circuit as impulse generating unit Technology design, solve that conventional audio impulse generator harmonic content is big, ropy technical problem, reached the technique effect that control mode is easy and effective, control accuracy is high;Fed back using temperature signal, output current signal feedback, the Technology design of voltage source voltage signal feedback closed loop control, solve conventional audio impulse generator it is single generation and the technical problem of feedback-less process, realize the feedback closed loop controls such as temperature drift, voltage x current drift, it is improved output audio pulse precision, the technique effect that error is reduced, can be widely applied to the Quality Detection of all kinds of audio frequency apparatuses.

Description

A kind of high-precision audio pulse circuit
Technical field
It the utility model is related to tonepulse technical field, more particularly to a kind of high-precision audio pulse circuit.
Background technology
As the intellectuality of modern electronic technology, high speed and the multidimensional production and living to people bring great side Just, and computer and Digital Signal Processing the multiple fields such as communication, navigation and space flight extensive use, then it is right It carries out Validity Test and just proposes higher requirement.Needed in face of such, tonepulse generator just plays wherein Important effect.
High-precision tonepulse generator is the signal source commonly used in testing field, can produce various complicated numerals and swash Encourage and pulse signal that amplitude-controllable, the high speed of adjustable pulse width, stability are high.Secondly, audio-frequency generator on the market today Usually there is the defects of precision is low, noise is big, unstable, test result is produced large effect.
Utility model content
Technical problem to be solved in the utility model, it is to be directed to above-mentioned technical deficiency, there is provided a kind of high-precision Audio pulse circuit is spent, is used using SCM system as key control unit, with fourth-order band-pass filter circuit, high-precision constant pressure Source, the Technology design that high precision clock circuit is impulse generating unit, solve conventional audio impulse generator harmonic content it is big, Ropy technical problem, the technique effect that control mode is easy and effective, control accuracy is high is reached;It is anti-using temperature signal Feedback, output current signal feedback, the Technology design of voltage source voltage signal feedback closed loop control, solve conventional audio pulse hair The raw single generation of device and the technical problem of feedback-less process, realize the feedback closed loop controls such as temperature drift, voltage x current drift, It is improved output audio pulse precision, the technique effect that error is reduced.
In order to solve the above technical problems, technical scheme is used by the utility model:
A kind of high-precision audio pulse circuit, it includes single machine unit, digital switch, digital regulation resistance, A/D conversion electricity Road, low-pass filter circuit and high-pass filtering circuit;The output end of the input connection digital switch of low-pass filter circuit, numeral are opened Close input and be connected with high-accuracy and constant potential source, the input of the output end connection high-pass filtering circuit of low-pass filter circuit;Numeral The output end of the input connection high-pass filtering circuit of potentiometer, the output end of digital regulation resistance are connected with power amplification circuit, The output end of power amplification circuit is provided with pulse output end mouth;Single machine unit input side one end is connected with high precision clock electricity Road, single machine unit input side other end I/O have input keyboard, and single machine unit output end side I/O is connected with photoelectric coupled circuit, Single machine unit connects control digital switch by photoelectric coupled circuit, and single machine unit output end opposite side parallel connection has display Screen;The controlled end of high-accuracy and constant potential source is connected on the I/O mouths of single machine unit, and the controlled end of digital regulation resistance is connected to monolithic On the I/O mouths of machine unit;
The input of A/D change-over circuits is connected with voltage sensor, temperature sensor and current sensor, A/D conversion electricity The output end on road is connected on the I/O mouths of single machine unit;Voltage sensor is arranged on the output end of high-accuracy and constant potential source, electric current Sensor is arranged on pulse output end.
Further optimize the technical program, described single machine unit is 89C51 SCM systems, A/D change-over circuit bags ADC0809 chips are included, the data output end of A/D change-over circuits is connected on the P2 mouths of single machine unit;High precision clock circuit For DS1302 clock chips, the I/O port of high precision clock circuit connects the P3.4 mouths of single machine unit, high precision clock circuit RST mouths connect the P3.5 mouths of single machine unit, the P3.6 mouths of the SCL mouths connection single machine unit of high precision clock circuit;
Further optimize the technical program, described photoelectric coupled circuit is MOC3021 chips, and digital switch is CD4006 cores Piece, the input of photoelectric coupled circuit are connected on the P3.0 mouths of single machine unit;The ControlA mouths of digital switch are connected to optocoupler electricity The output end on road;
Further optimize the technical program, described digital regulation resistance is MCP41010 chips.
Compared with prior art, the utility model has advantages below:1st, the system uses 89C51 SCM system conducts Main control unit, is integrated with the memory of larger capacity and abundant powerful hardware interface circuit, simple in construction, have very high performance Price ratio, cheap material benefit, suitable for popularity;2nd, the system is carried out using fourth-order band-pass filter circuit pulse signals Filtering, effectively increases the signal to noise ratio of audio pulse, and sound signal quality is improved;3rd, using digital regulation resistance conduct The volume of regulation output audio pulse, control accuracy effectively improve;It can be widely applied to all kinds of audio frequency apparatuses Quality Detection.
Brief description of the drawings
Fig. 1 is this circuit control module structural representation;
Fig. 2 is microcontroller system circuit schematic diagram in Fig. 1;
Fig. 3 is photoelectric coupled circuit and digital switch circuit theory diagrams in Fig. 1;
Fig. 4 is bandwidth-limited circuit schematic diagram in Fig. 1;
Fig. 5 is A/D change-over circuits schematic diagram in Fig. 1.
In figure, 1, single machine unit;2nd, high-accuracy and constant potential source;3rd, digital switch;4th, low-pass filter circuit;5th, high-pass filtering Circuit;6th, digital regulation resistance;7th, power amplifier;8th, pulse output end mouth;9th, A/D change-over circuits;10th, voltage sensor;11、 Temperature sensor;12nd, current sensor;13rd, photoelectric coupled circuit;14th, high precision clock circuit;15th, keyboard is inputted;16th, display screen.
Embodiment
To make the purpose of this utility model, technical scheme and advantage of greater clarity, with reference to embodiment And referring to the drawings, the utility model is further described.It should be understood that these descriptions are merely illustrative, and do not really want Limit the scope of the utility model.In addition, in the following description, the description to known features and technology is eliminated, to avoid not Necessarily obscure concept of the present utility model.
Embodiment one:As Figure 1-5, including single machine unit 1, digital switch 3, digital regulation resistance 6, A/D Change-over circuit 9, low-pass filter circuit 4 and high-pass filtering circuit 5;The input of low-pass filter circuit 4 connects the defeated of digital switch 3 Go out end, the input of digital switch 3 is connected with high-accuracy and constant potential source 2, the output end connection high-pass filtering circuit of low-pass filter circuit 4 5 input;The output end of the input connection high-pass filtering circuit 5 of digital regulation resistance 6, the output end of digital regulation resistance 6 connect Power amplification circuit 7 is connected to, the output end of power amplification circuit 7 is provided with pulse output end mouth 8;The input side of single machine unit 1 One end is connected with high precision clock circuit 14, and the input side other end I/O of single machine unit 1 has input keyboard 15, single machine unit 1 Output end side I/O is connected with photoelectric coupled circuit 13, and single machine unit 1 connects control digital switch 3, monolithic by photoelectric coupled circuit 13 The output end opposite side of machine unit 1 parallel connection has display screen 16;The controlled end of high-accuracy and constant potential source 2 is connected to single machine unit 1 I/O mouths on, the controlled end of digital regulation resistance 6 is connected on the I/O mouths of single machine unit 1;
The input of A/D change-over circuits 9 is connected with voltage sensor 10, temperature sensor 11 and current sensor 12, A/D The output end of change-over circuit 9 is connected on the I/O mouths of single machine unit 1;Voltage sensor 10 is arranged on high-accuracy and constant potential source 2 Output end, current sensor 12 are arranged on pulse output end mouth 8.
Described single machine unit 1 is 89C51 SCM systems, and A/D change-over circuits 9 include ADC0809 chips, and A/D turns The data output end for changing circuit 9 is connected on the P2 mouths of single machine unit 1;High precision clock circuit 14 is DS1302 clock cores Piece, the P3.4 mouths of the I/O port connection single machine unit 1 of high precision clock circuit 14, the RST mouths connection of high precision clock circuit 14 The P3.5 mouths of single machine unit 1, the P3.6 mouths of the SCL mouths connection single machine unit 1 of high precision clock circuit 14;Described optocoupler Circuit 13 is MOC3021 chips, and digital switch 3 is CD4006 chips, the input connection single machine unit 1 of photoelectric coupled circuit 13 On P3.0 mouths;The ControlA mouths of digital switch 3 are connected to the output end of photoelectric coupled circuit 13;Described digital regulation resistance 6 is MCP41010 chips.
As shown in figure 1, this circuit mainly includes pulse generating module and control module;Wherein pulse generating module mainly rises Pulse generation, the effect of impulse magnitude modulation;And control module mainly plays the signals such as detection output pulse waveform, temperature, and rise To the effect of control pulse generating module.Major control mode is as follows:High-accuracy and constant potential source 2 sends voltage signal.By numeral Switch 3 generation pulse signals, after by low-pass filter circuit 4 and the fourth-order band-pass of high-pass filtering circuit 5 filtering carry out signal filtering, Voltage signal is adjusted to current signal by digital regulation resistance 6 afterwards, and tonepulse is sent by the amplification of power amplification circuit 7 Signal;During pulse generation, single machine unit 1 detects environment temperature by temperature sensor 11, and to high-accuracy and constant Potential source 2 and digital regulation resistance 6 carry out temperature-compensating regulation, reduce influence of the temperature to the system;Secondly, single machine unit 1 is logical Whether the size that over-current sensor 12 and voltage sensor 10 detect output pulse signal is correct, and feedback control high-accuracy and constant Potential source 2, digital switch 3 and digital regulation resistance 6 enter the regulation of the amplitude of line-pulse signal, frequency, realize feedback closed loop control, reach To the signal to noise ratio of audio pulse and the effect of sound signal quality for improving output;
Fig. 2 is the circuit structure diagram of the system SCM system, and the system uses 89C51 SCM systems as master control list Member, is integrated with the memory of larger capacity and abundant powerful hardware interface circuit, simple in construction, have very high performance price Than cheap material benefit, suitable for popularity, and using DS1302 high precision clock circuits, precision is high, precise control.
In Fig. 3, this circuit realizes control circuit to the control of circuit occurs using MOC3021 photoelectric coupled circuits, and carries out light It is electrically isolated, it is therefore prevented that influence of the harmonic signal of control circuit to pulse generating circuit, improve the precision of this circuit;Secondly, Such as Fig. 4, this circuit uses fourth-order band-pass circuit, effectively weakens the harmonic signal in circuit, ensure that the quality of output signal. The utility model can be widely applied to the Quality Detection of all kinds of audio frequency apparatuses.
It should be appreciated that above-mentioned embodiment of the present utility model is used only for exemplary illustration or explains this reality With new principle, without forming to limitation of the present utility model.Therefore, without departing from spirit and scope of the present utility model In the case of any modification, equivalent substitution and improvements done etc., should be included within the scope of protection of the utility model.In addition, The appended claims for the utility model are intended to fall into scope and border or this scope and border Whole in equivalents changes and modifications example.

Claims (4)

  1. A kind of 1. high-precision audio pulse circuit, it is characterised in that:Including single machine unit (1), digital switch (3), numeral electricity Position device (6), A/D change-over circuits (9), low-pass filter circuit (4) and high-pass filtering circuit (5);The input of low-pass filter circuit (4) The output end of end connection digital switch (3), digital switch (3) input are connected with high-accuracy and constant potential source (2), low-pass filter circuit (4) input of output end connection high-pass filtering circuit (5);The input connection high-pass filtering circuit of digital regulation resistance (6) (5) output end, the output end of digital regulation resistance (6) are connected with power amplification circuit (7), the output of power amplification circuit (7) End is provided with pulse output end mouth (8);Single machine unit (1) input side one end is connected with high precision clock circuit (14), monolithic Machine unit (1) input side other end I/O has input keyboard (15), and single machine unit (1) output end side I/O is connected with optocoupler electricity Road (13), single machine unit (1) connect control digital switch (3) by photoelectric coupled circuit (13), and single machine unit (1) output end is another Side parallel connection has display screen (16);The controlled end of high-accuracy and constant potential source (2) is connected on the I/O mouths of single machine unit (1), The controlled end of digital regulation resistance (6) is connected on the I/O mouths of single machine unit (1);
    The input of A/D change-over circuits (9) is connected with voltage sensor (10), temperature sensor (11) and current sensor (12), the output end of A/D change-over circuits (9) is connected on the I/O mouths of single machine unit (1);Voltage sensor (10) is arranged on The output end of high-accuracy and constant potential source (2), current sensor (12) are arranged on pulse output end mouth (8).
  2. 2. high-precision audio pulse circuit according to claim 1, it is characterised in that:Single machine unit (1) is that 89C51 is mono- Piece machine system, A/D change-over circuits (9) include ADC0809 chips, and the data output end of A/D change-over circuits (9) is connected to single-chip microcomputer On the P2 mouths of unit (1);High precision clock circuit (14) is DS1302 clock chips, and the I/O port of high precision clock circuit (14) connects The P3.4 mouths of single machine unit (1) are connect, the P3.5 mouths of the RST mouths connection single machine unit (1) of high precision clock circuit (14) are high The P3.6 mouths of the SCL mouths connection single machine unit (1) of accuracy clock circuit (14).
  3. 3. high-precision audio pulse circuit according to claim 1, it is characterised in that:Photoelectric coupled circuit (13) is MOC3021 Chip, digital switch (3) are CD4006 chips, and the input of photoelectric coupled circuit (13) is connected on the P3.0 mouths of single machine unit (1); The ControlA mouths of digital switch (3) are connected to the output end of photoelectric coupled circuit (13).
  4. 4. high-precision audio pulse circuit according to claim 1, it is characterised in that:Digital regulation resistance (6) is MCP41010 chips.
CN201721036558.0U 2017-08-18 2017-08-18 A kind of high-precision audio pulse circuit Expired - Fee Related CN207124736U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201721036558.0U CN207124736U (en) 2017-08-18 2017-08-18 A kind of high-precision audio pulse circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201721036558.0U CN207124736U (en) 2017-08-18 2017-08-18 A kind of high-precision audio pulse circuit

Publications (1)

Publication Number Publication Date
CN207124736U true CN207124736U (en) 2018-03-20

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Application Number Title Priority Date Filing Date
CN201721036558.0U Expired - Fee Related CN207124736U (en) 2017-08-18 2017-08-18 A kind of high-precision audio pulse circuit

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109771819A (en) * 2018-12-24 2019-05-21 广州普正生物科技有限公司 A kind of music control electrotherapy rssi circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109771819A (en) * 2018-12-24 2019-05-21 广州普正生物科技有限公司 A kind of music control electrotherapy rssi circuit

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Granted publication date: 20180320

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