CN109451397A - A kind of speaker numerical control system - Google Patents
A kind of speaker numerical control system Download PDFInfo
- Publication number
- CN109451397A CN109451397A CN201811347099.7A CN201811347099A CN109451397A CN 109451397 A CN109451397 A CN 109451397A CN 201811347099 A CN201811347099 A CN 201811347099A CN 109451397 A CN109451397 A CN 109451397A
- Authority
- CN
- China
- Prior art keywords
- resistance
- dsp chip
- module
- chip module
- circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000005236 sound signal Effects 0.000 claims abstract description 36
- 239000003990 capacitor Substances 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 230000005611 electricity Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/16—Sound input; Sound output
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/21—Pc I-O input output
- G05B2219/21137—Analog to digital conversion, ADC, DAC
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Signal Processing (AREA)
- Audiology, Speech & Language Pathology (AREA)
- General Health & Medical Sciences (AREA)
- Human Computer Interaction (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Acoustics & Sound (AREA)
- Automation & Control Theory (AREA)
- Amplifiers (AREA)
Abstract
Speaker numerical control system provided by the invention, it include include audio signal input module, dsp chip module, EQ control module and audio signal output module, wherein audio signal input module is electrically connected with dsp chip module, dsp chip module is electrically connected with EQ control module, and dsp chip module is electrically connected with audio signal output module.The signal inputted by audio signal input module is carried out digital-to-analog conversion by EQ control module by the present invention, then the information after conversion is exported by audio signal output module again, to complete to handle the signal of input and achieve the purpose that required signal.Speaker numerical control system of the invention can be widely applied to numerical control system field.
Description
Technical field
The present invention relates generally to control systems, particularly, are related to a kind of speaker numerical control system.
Background technique
In the prior art, speaker has become the required equipment of computer holder, while being also the public beautiful music of appreciation
Outer with excellent film matches tool.There are many speakers that signal can be adjusted, but signal, which is adjusted, is mostly
It carries out in the following way: sending a signal to MCU by operating encoder, DSP is then controlled by MCU, thus to letter
It number is adjusted.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides one kind can be to the speaker number that input signal is adjusted
Control system.
In order to realize the above technical effect, the present invention uses following technological means:
A kind of speaker numerical control system, including audio signal input module, dsp chip module, EQ control module and sound
Frequency signal output module, wherein audio signal input module is electrically connected with dsp chip module, and dsp chip module and EQ control mould
Block electrical connection, dsp chip module are electrically connected with audio signal output module.
A kind of improvement as above-mentioned technical proposal, wherein audio signal input module include the first signal input circuit and
Second signal input circuit.
A kind of improvement as above-mentioned technical proposal, wherein the first signal input circuit includes the first signal input part, the
Four resistance, the 5th resistance, the 6th resistance and the first transport and placing device, wherein the first signal input part is connect with one end of the 4th resistance,
The other end of 4th resistance is connect with one end of the 5th resistance and the other end of the 4th resistance also connects with the end a of the first transport and placing device
It connects, the other end of the 5th resistance is connected with one end of the common end of the first transport and placing device and the 6th resistance respectively, the b of the first transport and placing device
End is connect with digital grounding, and the other end of the 6th resistance is connected with dsp chip module.
A kind of improvement as above-mentioned technical proposal, wherein second signal input circuit includes second signal input terminal,
Two resistance, first resistor, 3rd resistor and the second transport and placing device, wherein second signal input terminal is connected with one end of second resistance,
The other end of second resistance is connected with the end a of one end of first resistor and the second transport and placing device respectively, the other end point of first resistor
It is not connected with one end of the second transport and placing device common end and 3rd resistor, the end b of the second transport and placing device is connect with digital grounding, third electricity
The other end of resistance is connected with dsp chip module.
A kind of improvement as above-mentioned technical proposal, wherein dsp chip module includes reservoir and digital analog converter,
DSP chip module has multiple pins.
A kind of improvement as above-mentioned technical proposal, wherein EQ control module includes EQ control circuit, wherein EQ control electricity
Road includes that EQ controls the first circuit, EQ control second circuit, EQ control tertiary circuit and EQ the 4th circuit of control.
A kind of improvement as above-mentioned technical proposal, wherein EQ the first circuit of control includes the 8th resistance and the first variable resistance,
Wherein one end of the 8th resistance is connected with dsp chip module, and the other end of the 8th resistance is connected with one end of the first variable resistance；EQ control
Second circuit processed includes the 7th resistance and the second variable resistance, wherein one end of the 7th resistance is connected with dsp chip module, the 7th resistance
The other end be connected with one end of the second variable resistance；It includes the 9th resistance and third variable resistance that EQ, which controls tertiary circuit, wherein the 9th electricity
One end of resistance is connected with dsp chip module, and the other end of the 9th resistance is connected with one end of third variable resistance；EQ controls the 4th circuit
Including the tenth resistance and the 4th variable resistance, wherein one end of the tenth resistance is connected with dsp chip module, the other end of the tenth resistance with
One end of 4th variable resistance is connected.
A kind of improvement as above-mentioned technical proposal, wherein audio signal output module include the first signal output apparatus and
Second signal output circuit.
A kind of improvement as above-mentioned technical proposal, wherein the first signal output apparatus includes eleventh resistor, the 12nd
Resistance, thirteenth resistor, the 14th resistance, the 15th resistance, first capacitor, third transport and placing device and the first output end, wherein the
One end of 11 resistance is connected with dsp chip module, the other end of eleventh resistor respectively with one end of twelfth resistor and
One end of three transport and placing devices is connected, the other end of twelfth resistor one end with the common end of third transport and placing device and first capacitor respectively
It is connected, the other end of first capacitor is connected to one end of thirteenth resistor, and the other end of thirteenth resistor is connected to the first output
End, one end of the 14th resistance are connected with dsp chip module, and the other end of the 14th resistance is another with third transport and placing device respectively
End is connected with one end of the 15th resistance, and the other end of the 15th resistance is connect with digital grounding.
A kind of improvement as above-mentioned technical proposal, wherein second signal output circuit includes the 16th resistance, the 17th
Resistance, the 18th resistance, the 19th resistance, the 20th resistance, four high guaily unit device, the second capacitor and second output terminal, wherein the
One end of 20 resistance is connected with dsp chip module, the other end of the 20th resistance respectively with one end of the 19th resistance and
One end of four high guaily unit device is connected, the other end of the 19th resistance one end with the common end of four high guaily unit device and the second capacitor respectively
It is connected, the other end of the second capacitor is connected with one end of the 18th resistance, and the other end of the 18th resistance is connected to the second output
End, one end of the 16th resistance is connected with dsp chip module, the other end of the 16th resistance one end with the 17th resistance respectively
It is connected with the other end of four high guaily unit device, the other end of the 17th resistance is connect with digital grounding.
Technical effect:
Speaker numerical control system provided by the invention comprising including audio signal input module, dsp chip module,
EQ control module and audio signal output module, wherein audio signal input module is electrically connected with dsp chip module, dsp chip
Module is electrically connected with EQ control module, and dsp chip module is electrically connected with audio signal output module.The present invention controls mould by EQ
The signal inputted by audio signal input module is carried out digital-to-analog conversion by block, then again will by audio signal output module
Information after conversion is exported, to complete to handle the signal of input and achieve the purpose that required signal.This hair
Bright circuit is directly to issue signal by operation potentiometer to control DSP, so that signal be adjusted, doing so be can be omitted
The circuit of the part MCU is conducive to simplify circuit and reduces cost.
Detailed description of the invention
It will be obtained more fully from the detailed description of the embodiment below with reference to attached drawing with other advantages and features below
Understand, attached drawing must be considered in illustrative and non-limiting mode, in which:
Fig. 1 is a kind of schematic diagram of speaker numerical control system circuit according to the present invention.
Specific embodiment
This programme in order to better understand will in detail explain embodiment below.
As shown in Figure 1, the present invention provides a kind of speaker numerical control system.Speaker numerical control system of the invention includes
Audio signal input module, dsp chip module, EQ control module and audio signal output module, wherein audio signal inputs mould
Block is electrically connected with dsp chip module, and dsp chip module is electrically connected with EQ control module, and dsp chip module and audio signal are defeated
Module is electrically connected out.
In one embodiment of the invention, it is preferable that EQ control module can be knob.
In one embodiment of the invention, it is preferable that wherein audio signal input module includes the first signal input electricity
Road and second signal input circuit.
In one embodiment of the invention, it is preferable that wherein the first signal input circuit include the first signal input part,
4th resistance, the 5th resistance, the 6th resistance and the first transport and placing device, wherein one end of the first signal input part and the 4th resistance connects
It connects, the other end of the 4th resistance is connect with one end of the 5th resistance and the other end of the 4th resistance also a with the first transport and placing device
End connection, the other end of the 5th resistance are connected with one end of the common end of the first transport and placing device and the 6th resistance respectively, the first amplifier
The end b of device is connect with digital grounding, and the other end of the 6th resistance is connected with dsp chip module.
In one embodiment of the invention, it is preferable that wherein second signal input circuit include second signal input terminal,
Second resistance, first resistor, 3rd resistor and the second transport and placing device, wherein one end phase of second signal input terminal and second resistance
Even, the other end of second resistance is connected with the end a of one end of first resistor and the second transport and placing device respectively, the other end of first resistor
It is connected respectively with one end of the second transport and placing device common end and 3rd resistor, the end b of the second transport and placing device is connect with digital grounding, third
The other end of resistance is connected with dsp chip module.
In one embodiment of the invention, it is preferable that wherein dsp chip module includes reservoir and digital-to-analogue conversion
Device, dsp chip module have multiple pins.
In one embodiment of the invention, it is preferable that wherein EQ control module includes step potentiometer, step-by-step movement electricity
Position device includes EQ control circuit, and wherein EQ control circuit includes that EQ controls the first circuit, EQ control second circuit, EQ control third
Circuit and EQ control the 4th circuit.
In one embodiment of the invention, it is preferable that it includes that the 8th resistance and first become that wherein EQ, which controls the first circuit,
Resistance, wherein one end of the 8th resistance is connected with dsp chip module, the other end of the 8th resistance is connected with one end of the first variable resistance；
It includes the 7th resistance and the second variable resistance that EQ, which controls second circuit, wherein one end of the 7th resistance is connected with dsp chip module, the 7th
The other end of resistance is connected with one end of the second variable resistance；EQ controls tertiary circuit and includes the 9th resistance and third variable resistance, wherein the
One end of nine resistance is connected with dsp chip module, and the other end of the 9th resistance is connected with one end of third variable resistance；EQ control the 4th
Circuit includes the tenth resistance and the 4th variable resistance, wherein one end of the tenth resistance is connected with dsp chip module, the tenth resistance it is another
End is connected with one end of the 4th variable resistance.
In one embodiment of the invention, it is preferable that wherein audio signal output module includes the first signal output electricity
Road and second signal output circuit.
In one embodiment of the invention, it is preferable that wherein the first signal output apparatus includes eleventh resistor, the tenth
Two resistance, thirteenth resistor, the 14th resistance, the 15th resistance, first capacitor, third transport and placing device and the first output end, wherein
One end of eleventh resistor is connected with dsp chip module, the other end of eleventh resistor respectively with one end of twelfth resistor and
One end of third transport and placing device is connected, the other end of twelfth resistor respectively with the common end of third transport and placing device and first capacitor one
End is connected, and the other end of first capacitor is connected to one end of thirteenth resistor, and it is defeated that the other end of thirteenth resistor is connected to first
One end of outlet, the 14th resistance is connected with dsp chip module, and the other end of the 14th resistance is another with third transport and placing device respectively
One end is connected with one end of the 15th resistance, and the other end of the 15th resistance is connect with digital grounding.
In one embodiment of the invention, it is preferable that wherein second signal output circuit includes the 16th resistance, the tenth
Seven resistance, the 18th resistance, the 19th resistance, the 20th resistance, four high guaily unit device, the second capacitor and second output terminal, wherein
One end of 20th resistance is connected with dsp chip module, the other end of the 20th resistance respectively with one end of the 19th resistance and
One end of four high guaily unit device is connected, the other end of the 19th resistance respectively with the common end of four high guaily unit device and the second capacitor one
End is connected, and the other end of the second capacitor is connected with one end of the 18th resistance, and it is defeated that the other end of the 18th resistance is connected to second
One end of outlet, the 16th resistance is connected with dsp chip module, the other end of the 16th resistance respectively with the 17th resistance one
End is connected with the other end of four high guaily unit device, and the other end of the 17th resistance is connect with digital grounding.
The working principle of speaker numerical control system of the invention is as follows: signal passes through the first input signal circuit and second
Input signal circuit is inputted, and EQ control module then passes through potentiometer and divides the voltage of 3.3V, to export difference
Voltage, the different voltages of output carry out digital-to-analog conversion by dsp chip module, to complete digitally control input
Signal carries out and exports the input signal after control by audio signal output module.
Technical effect:
Speaker numerical control system provided by the invention comprising including audio signal input module, dsp chip module,
EQ control module and audio signal output module, wherein audio signal input module is electrically connected with dsp chip module, dsp chip
Module is electrically connected with EQ control module, and dsp chip module is electrically connected with audio signal output module.The present invention controls mould by EQ
The signal inputted by audio signal input module is carried out digital-to-analog conversion by block, then again will by audio signal output module
Information after conversion is exported, to complete to handle the signal of input and achieve the purpose that required signal.
Obviously, above-described embodiment is only intended to clearly illustrate example, and does not limit the embodiments.For
For those of ordinary skill in the art, other various forms of variations or change can also be made on the basis of the above description
It is dynamic.There is no necessity and possibility to exhaust all the enbodiments.And obvious variation extended from this or change
It moves still within the protection scope of the invention.
Claims (10)
1. a kind of speaker numerical control system, it is characterised in that: including audio signal input module, dsp chip module, EQ control
Module and audio signal output module, wherein audio signal input module is electrically connected with dsp chip module, dsp chip module with
The electrical connection of EQ control module, dsp chip module are electrically connected with audio signal output module.
2. a kind of speaker numerical control system according to claim 1, which is characterized in that audio signal input module includes
First signal input circuit and second signal input circuit.
3. a kind of speaker numerical control system according to claim 2, which is characterized in that the first signal input circuit includes
First signal input part, the 4th resistance, the 5th resistance, the 6th resistance and the first transport and placing device, wherein the first signal input part and
One end of four resistance connects, the other end of the 4th resistance connect with one end of the 5th resistance and the other end of the 4th resistance also with
The end a of first transport and placing device connects, the other end of the 5th resistance one end with the common end of the first transport and placing device and the 6th resistance respectively
It is connected, the end b of the first transport and placing device is connect with digital grounding, and the other end of the 6th resistance is connected with dsp chip module.
4. a kind of speaker numerical control system according to claim 2, which is characterized in that second signal input circuit includes
Second signal input terminal, second resistance, first resistor, 3rd resistor and the second transport and placing device, wherein second signal input terminal and
One end of two resistance is connected, and the other end of second resistance is connected with the end a of one end of first resistor and the second transport and placing device respectively, the
The other end of one resistance is connected with one end of the second transport and placing device common end and 3rd resistor respectively, the end b of the second transport and placing device and number
The other end of word grounding connection, 3rd resistor is connected with dsp chip module.
5. a kind of speaker numerical control system according to claim 1, which is characterized in that dsp chip module includes storage
Device and digital analog converter, dsp chip module have multiple pins.
6. a kind of speaker numerical control system according to claim 1, which is characterized in that EQ control module includes EQ control
Circuit, wherein EQ control circuit includes that EQ controls the first circuit, EQ control second circuit, EQ control tertiary circuit and EQ control the
Four circuits.
7. a kind of speaker numerical control system according to claim 6, which is characterized in that it includes that EQ, which controls the first circuit,
Eight resistance and the first variable resistance, wherein one end of the 8th resistance is connected with dsp chip module, the other end of the 8th resistance and first becomes
One end of resistance is connected；It includes the 7th resistance and the second variable resistance that EQ, which controls second circuit, wherein one end of the 7th resistance and dsp chip
Module is connected, and the other end of the 7th resistance is connected with one end of the second variable resistance；It includes the 9th resistance and that EQ, which controls tertiary circuit,
Three variable resistances, wherein one end of the 9th resistance is connected with dsp chip module, the other end and one end phase of third variable resistance of the 9th resistance
Even；It includes the tenth resistance and the 4th variable resistance that EQ, which controls the 4th circuit, wherein one end of the tenth resistance is connected with dsp chip module,
The other end of tenth resistance is connected with one end of the 4th variable resistance.
8. a kind of speaker numerical control system according to claim 1, which is characterized in that audio signal output module includes
First signal output apparatus and second signal output circuit.
9. a kind of speaker numerical control system according to claim 8, which is characterized in that the first signal output apparatus includes
Eleventh resistor, twelfth resistor, thirteenth resistor, the 14th resistance, the 15th resistance, first capacitor, third transport and placing device and
First output end, wherein one end of eleventh resistor is connected with dsp chip module, and the other end of eleventh resistor is respectively with the tenth
One end of two resistance is connected with one end of third transport and placing device, the other end of the twelfth resistor common end with third transport and placing device respectively
Be connected with one end of first capacitor, the other end of first capacitor is connected to one end of thirteenth resistor, thirteenth resistor it is another
End be connected to the first output end, one end of the 14th resistance is connected with dsp chip module, the other end of the 14th resistance respectively with
One end of the other end of third transport and placing device and the 15th resistance is connected, and the other end of the 15th resistance is connect with digital grounding.
10. a kind of speaker numerical control system according to claim 8, which is characterized in that second signal output circuit packet
Include the 16th resistance, the 17th resistance, the 18th resistance, the 19th resistance, the 20th resistance, four high guaily unit device, the second capacitor
And second output terminal, wherein one end of the 20th resistance is connected with dsp chip module, the other end of the 20th resistance is respectively with
One end of 19 resistance is connected with one end of four high guaily unit device, and the other end of the 19th resistance is public with four high guaily unit device respectively
End be connected with one end of the second capacitor, the other end of the second capacitor is connected with one end of the 18th resistance, the 18th resistance it is another
One end is connected to second output terminal, and one end of the 16th resistance is connected with dsp chip module, the other end difference of the 16th resistance
It is connected with the other end of one end of the 17th resistance and four high guaily unit device, the other end of the 17th resistance is connect with digital grounding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811347099.7A CN109451397A (en) | 2018-11-13 | 2018-11-13 | A kind of speaker numerical control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811347099.7A CN109451397A (en) | 2018-11-13 | 2018-11-13 | A kind of speaker numerical control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109451397A true CN109451397A (en) | 2019-03-08 |
Family
ID=65552824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811347099.7A Pending CN109451397A (en) | 2018-11-13 | 2018-11-13 | A kind of speaker numerical control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109451397A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203434943U (en) * | 2013-09-22 | 2014-02-12 | 杭州和声电子有限公司 | Multifunctional intelligent integrated circuit power amplification system |
| CN204733306U (en) * | 2015-06-10 | 2015-10-28 | 深圳市东景盛电子技术有限公司 | Utilize the Bluetooth player of DSP process audio |
| CN105096976A (en) * | 2015-08-03 | 2015-11-25 | 宁波爱维斯工贸有限公司 | Audio system for controlling DSP via intelligent APP in Bluetooth mode |
| CN105472506A (en) * | 2015-11-24 | 2016-04-06 | 宁波柏人艾电子有限公司 | Microphone circuit audio control circuit |
| CN105764005A (en) * | 2016-03-02 | 2016-07-13 | 宁波音王电声股份有限公司 | Guitar power amplifier based on technology of DSP audio signal processing |
| CN107765590A (en) * | 2017-08-28 | 2018-03-06 | 广州飞达音响股份有限公司 | A kind of tuning system and method for knob sound console |
| CN107843856A (en) * | 2017-12-14 | 2018-03-27 | 成都隆航科技有限公司 | Total voltage Acquisition Circuit in battery equalization system |
| CN209030422U (en) * | 2018-11-13 | 2019-06-25 | 广州杰士莱电子有限公司 | A kind of speaker numerical control system |
-
2018
- 2018-11-13 CN CN201811347099.7A patent/CN109451397A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203434943U (en) * | 2013-09-22 | 2014-02-12 | 杭州和声电子有限公司 | Multifunctional intelligent integrated circuit power amplification system |
| CN204733306U (en) * | 2015-06-10 | 2015-10-28 | 深圳市东景盛电子技术有限公司 | Utilize the Bluetooth player of DSP process audio |
| CN105096976A (en) * | 2015-08-03 | 2015-11-25 | 宁波爱维斯工贸有限公司 | Audio system for controlling DSP via intelligent APP in Bluetooth mode |
| CN105472506A (en) * | 2015-11-24 | 2016-04-06 | 宁波柏人艾电子有限公司 | Microphone circuit audio control circuit |
| CN105764005A (en) * | 2016-03-02 | 2016-07-13 | 宁波音王电声股份有限公司 | Guitar power amplifier based on technology of DSP audio signal processing |
| CN107765590A (en) * | 2017-08-28 | 2018-03-06 | 广州飞达音响股份有限公司 | A kind of tuning system and method for knob sound console |
| CN107843856A (en) * | 2017-12-14 | 2018-03-27 | 成都隆航科技有限公司 | Total voltage Acquisition Circuit in battery equalization system |
| CN209030422U (en) * | 2018-11-13 | 2019-06-25 | 广州杰士莱电子有限公司 | A kind of speaker numerical control system |
Non-Patent Citations (1)
| Title |
|---|
| 朱若寒;孙易冰;: "基于DSP信号采集系统设计与实现", 微计算机信息, no. 08, 15 March 2008 (2008-03-15) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109884384B (en) | Signal acquisition circuit compatible with current and voltage input | |
| CN105187631A (en) | Intelligent terminal key device based on earphone interface and control method of intelligent terminal key device | |
| CN209030422U (en) | A kind of speaker numerical control system | |
| CN109361503B (en) | Multi-scroll circuit based on sawtooth wave chaos inverse control | |
| CN110380731A (en) | A kind of D/A conversion circuit | |
| CN109451397A (en) | A kind of speaker numerical control system | |
| CN106412764A (en) | Audio data processing method and device, and earphone | |
| CN206208961U (en) | A kind of conditioned circuit device | |
| CN103633952B (en) | switching mode amplifier operation | |
| CN109547026A (en) | A kind of current steering digital-to-analog converter based on R-2R resistor network | |
| KR950030144A (en) | AV System Audio / Video Connectivity | |
| CN204906363U (en) | Flash analog to digital conversion circuit | |
| CN106160727A (en) | A kind of isolation circuit and isolation circuit control method | |
| CN107656572A (en) | The multichannel variable voltage source and its control method realized with digital analog converter | |
| CN105450191A (en) | Dual-line silicon microphone amplifier | |
| CN209803233U (en) | Signal acquisition circuit compatible with current and voltage input | |
| CN208597074U (en) | The status adjustment device of electronic equipment | |
| CN207638859U (en) | Analog-to-digital conversion Acquisition Circuit | |
| CN214675634U (en) | Audio processing circuit, audio processing device and audio backup system | |
| CN106331947A (en) | Coding and decoding chip and method for removing DC level of microphone | |
| CN214704459U (en) | Dynamic constant current circuit and communication device applying same | |
| CN110262613A (en) | A kind of voltage regulator circuit and method | |
| CN113242487B (en) | Line control method, line control device, adapter and line control system | |
| CN203588693U (en) | Voice circuit structure | |
| CN106488357B (en) | A kind of method and apparatus of audio interface conversion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |