CN213938306U - Vehicle-mounted independent power amplifier circuit and vehicle-mounted sound box - Google Patents
Vehicle-mounted independent power amplifier circuit and vehicle-mounted sound box Download PDFInfo
- Publication number
- CN213938306U CN213938306U CN202120035397.3U CN202120035397U CN213938306U CN 213938306 U CN213938306 U CN 213938306U CN 202120035397 U CN202120035397 U CN 202120035397U CN 213938306 U CN213938306 U CN 213938306U
- Authority
- CN
- China
- Prior art keywords
- module
- power amplifier
- input end
- vehicle
- voltage
- 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.)
- Expired - Fee Related
Links
- 230000009466 transformation Effects 0.000 claims description 35
- 230000005236 sound signal Effects 0.000 abstract description 15
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 230000003139 buffering effect Effects 0.000 abstract description 3
- 239000013307 optical fiber Substances 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000013016 damping Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Images
Landscapes
- Amplifiers (AREA)
Abstract
The utility model discloses a vehicle-mounted independent power amplifier circuit and vehicle-mounted sound equipment, when analog audio signals are inputted from the outside, an audio DSP processing module processes the input analog signals under the control of an MCU main control module, then transmits the input analog signals to a first operational amplifier module to be converted into differential signals, the differential signals are directly transmitted to a second operational amplifier module of the power amplifier module for buffering through an output plug, the audio signals are transmitted to a digital power amplifier module to be outputted to a loudspeaker after the differential signals are converted into single ends, the simplicity of the signals is ensured, when the analog audio signals are inputted from the outside, the analog audio signals are transmitted to an audio DSP processing module for processing through a decoding chip CS8416+ CS4398 in a digital audio decoding module, the operational amplifier ICNE5532 transmitted to the first operational amplifier module is converted into differential signals, the differential signals are directly transmitted to the second operational amplifier module of the power amplifier module through the output plug, the buffered audio signals are transmitted to the digital power amplifier module after the differential, the two paths of sound source input signals can be switched and selected through the switch of the host module.
Description
Technical Field
The utility model relates to a vehicle-mounted power amplifier circuit technical field especially relates to a vehicle-mounted independent power amplifier circuit and vehicle-mounted sound.
Background
With the rapid development of high integration of functions of car navigation and intensive mixed use of digital and analog circuits, especially with the popularization of intelligent car navigation, audio playing is used as the main content of car navigation and becomes an essential part for people to drive and go out.
However, in the existing vehicle navigation, most of the existing vehicle navigation systems are designed by using an integrated power amplifier, for example, a 7851 power amplifier pushes a multi-channel loudspeaker, or two forms of an external power amplifier are modified, because the integrated power amplifier is an integral power amplifier, the volume is large, the integrated power amplifier cannot be installed in a place close to an original vehicle loudspeaker, and the integrated power amplifier needs to be connected to a loudspeaker end on a vehicle through a long wire, the loudspeaker wire is too long to cause great loss of tone quality signals, and the tone quality signals pass through the switching phenomenon of a plurality of sockets, so that the internal resistance of the loudspeaker wire is increased, the damping coefficient of the power amplifier on the loudspeaker is influenced, the damping coefficient is reduced to influence the control force on the loudspeaker, a lot of sound details can be lost, and the sound reduction degree is poor. The long and thin horn wire is particularly adopted, signals coming out of the power amplifier are not well transmitted to the horn, the power amplifier also causes the fact that the sound is muddy due to the fact that the control force of the horn is reduced, the sound emitted is not ideal enough, the sound is stuffy, the single body is thin and weak, the ear is sharp, the details are not rich enough, and the user can not experience the joy brought by listening to the music.
Therefore, it is desirable to provide a vehicle-mounted independent power amplifier circuit and a vehicle-mounted audio to solve the problems of the prior art.
SUMMERY OF THE UTILITY MODEL
To the defect that above-mentioned prior art exists, the utility model aims to provide a vehicle-mounted independent power amplifier circuit and vehicle-mounted stereo set.
In order to achieve the above object, the utility model provides a vehicle-mounted independent power amplifier circuit, which comprises a host module and 4 identical and independent power amplifier modules, wherein the host module and the 4 power amplifier modules are connected by differential signals; the host module comprises an audio DSP processing module, a digital audio decoding module, an MCU main control module, a first operational amplifier module and an output plug, wherein the signal output end of the MCU main control module is connected with the signal input end of the audio DSP processing module, the signal output end of the digital audio decoding module is connected with the signal input end of the audio DSP processing module, the signal output end of the audio DSP processing module is connected with the signal input end of the first operational amplifier module, and the signal output end of the first operational amplifier module is connected with the signal input end of the output plug; the power amplifier module comprises an independent socket, a third voltage transformation module, a digital power amplifier module and a second operational amplifier module, wherein the voltage input end of the third voltage transformation module is connected with the voltage input end of the independent socket, the voltage output end of the third voltage transformation module is connected with the voltage input end of the digital power amplifier module, the signal input end of the digital power amplifier module is connected with the signal output end of the second operational amplifier module, the signal output end of the digital operational amplifier module is connected with the signal input end of the independent socket and connected with an original vehicle loudspeaker, the signal input end of the second operational amplifier module is connected with the signal input end of the independent socket, and the voltage input end and the signal input end of the independent socket are connected with the output plug.
Preferably, the model adopted by the MCU master control module is STM 832.
Preferably, the model number of the digital audio decoding module is CS8416+ CS 4398.
Preferably, the models of the first operational amplifier module and the second operational amplifier module are both NE 5532.
Preferably, the model number adopted by the digital power amplifier module is TA 2022.
Preferably, the host module further includes a first voltage transformation module, a second voltage transformation module, a power socket and a control and display module, a voltage output end of the power socket is connected with a voltage input end of the first voltage transformation module and a voltage input end of the second voltage transformation module respectively, a voltage output end of the first voltage transformation module is connected with a voltage input end of the first operational amplifier module and a voltage input end of the output plug respectively, a signal output end of the audio DSP processing module is connected with a signal input end of the control and display module, and a voltage output end of the second voltage transformation module is connected with the audio DSP processing module.
Preferably, the first transformation module is of the type MP 1401.
Preferably, the second transformation module adopts DC/DC and/or adopts a power chip with the model number of MP 2482.
The vehicle-mounted sound box comprises the vehicle-mounted independent power amplifier circuit.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model provides an on-vehicle independent power amplifier circuit, it includes host computer module and 4 the same and independent power amplifier modules, all adopt differential signal to connect between host computer module and the 4 independent power amplifier modules, the interference killing feature is strong, detached power amplifier module is favorable to installing the place more nearly from former car loudspeaker after independent, reduce the loss of loudspeaker line transmission, the volume can accomplish very little, only occupy very little space and just can install near the place of loudspeaker, the loss of music detail falls to lower, the authenticity of biggest reduction sound, it has the level to make the sound detail richen clear, it is more outstanding to move, whole tone quality has been promoted, bring comfortable experience for the user.
2. The host module is provided with the coaxial input of optical fiber, the electrical isolation can be realized by realizing the long-distance transmission connection of the optical fiber, the transmission of digital noise through a ground wire is prevented, the signal-to-noise ratio of the DAC is favorably improved, the electric signal is coaxially transmitted, the sound electric signal has more elasticity, the loss of photoelectric conversion of the optical fiber is avoided, and the signal is more stable.
3. The digital power amplifier module adopts a T-type digital power amplifier, adopts a TA2022 model, and well improves power and tone quality.
4. The utility model provides a vehicle-mounted sound equipment, this vehicle-mounted sound equipment has used the on-vehicle independent power amplifier circuit of first embodiment, directly arrives loudspeaker, has shortened the line in the middle, has improved tone quality greatly, lets the listener listen comfortable, can generally promote the travelling comfort of trade product, the extensive popularization of helping hand vehicle navigation product.
Drawings
In order to illustrate the embodiments of the present invention more clearly, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the description below are some embodiments of the present invention, and those skilled in the art can also obtain other drawings without creative efforts.
Fig. 1 is a schematic diagram of the circuit principle structure of the present invention.
Description of reference numerals:
10. a host module; 101. an audio DSP processing module; 102. a digital audio decoding module; 103. the MCU master control module; 104. a first operational amplifier module; 105. an output plug; 106. a power socket; 107. a first voltage transformation module; 108. a second voltage transformation module; 109. a control and display module; 20. a power amplifier module; 201. A stand-alone socket; 202. a second operational amplifier module; 203. a third voltage transformation module; 204. and a digital power amplifier module.
Detailed Description
The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly. It is obvious that the described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
The terms "including" and "having," and any variations thereof, in the description and claims of the invention and the above description of the drawings are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and in the claims, or in the drawings, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. In the specification and claims of the present invention or in the drawings, directional terms such as "upper", "lower", "left", "right", "front", "rear", "side" and the like are used for relative positional description with respect to the drawings provided, and are not used to describe a specific order of actual products.
Referring to fig. 1, a first embodiment of the present invention provides a vehicle-mounted independent power amplifier circuit, which includes a host module 10 and 4 identical and independent power amplifier modules 20, wherein the host module 10 and the 4 independent power amplifier modules 20 are connected by differential signals, and the power amplifier modules 20 separated independently are favorable to being installed at a place closer to an original car horn, so as to reduce the transmission loss of the horn wire.
The host module 10 includes an audio DSP processing module 101, a digital audio decoding module, an MCU main control module 103, a first operational amplifier module 104 and an output plug 105, a signal output end of the MCU main control module 103 is connected to a signal input end of the audio DSP processing module 101, a signal output end of the digital audio decoding module 102 is connected to a signal input end of the audio DSP processing module 101, a signal output end of the audio DSP processing module 101 is connected to a signal input end of the first operational amplifier module 104, and a signal output end of the first operational amplifier module 104 is connected to a signal input end of the output plug 105.
When the external audio input signal is a digital audio signal, the external audio input signal needs to be input to the signal input end of the digital audio decoding module 102 through the optical fiber coaxial, and then is transmitted to the signal input end of the audio DSP processing module 101; when the external audio input signal is an analog audio signal, the analog audio signal can be directly input to the signal input terminal of the audio DSP processing module 101. Therefore, the host module 10 is provided with the optical fiber coaxial input, the optical fiber realizes the long-distance transmission connection, the electrical isolation can be realized, the transmission of digital noise through a ground wire is prevented, the signal-to-noise ratio of the DAC is favorably improved, the electrical signal is coaxially transmitted, the sound electrical signal has more elasticity, the loss of photoelectric conversion of the optical fiber is avoided, and the signal is more stable.
The MCU master control module 103 is an STM832 model, and mainly controls the audio DSP processing module 101 to process audio signals. The digital audio decoding module 102 has a model number CS8416+ CS 4398. The first operational amplifier module 104 is of a type NE5532, and converts a signal output from the audio DSP processing module 101 to the first operational amplifier module 104 into a differential signal.
Further, the host module 10 further includes a first voltage transformation module 107, a second voltage transformation module 108, a power socket 106 and a control and display module 109, a voltage output end of the power socket 106 is respectively connected with a voltage input end of the first voltage transformation module 107 and a voltage input end of the second voltage transformation module 108, a voltage output end of the first voltage transformation module 107 is respectively connected with a voltage input end of the first operational amplifier module 104 and a voltage input end of the output plug 105, a signal output end of the audio DSP processing module 101 is connected with a signal input end of the control and display module 109, and a voltage output end of the second voltage transformation module 108 is connected with the audio DSP processing module 101. The power socket 106 provides a normal voltage for the host module 10, and supplies power to each sub-module in the host module 10 to work normally after voltage conversion is performed by the first voltage transformation module 107 and the second voltage transformation module 108. The power socket 106 is internally provided with a fuse of 15A, when the current abnormally rises to a certain height and heat, the fuse is fused to cut off the current, and the safe operation of the circuit is protected. The first voltage transformation module 107 is MP1401, which transforms the external power into a voltage of plus or minus 15V. The second transforming module 108 outputs 5V voltage by using DC/DC and/or uses a power chip with model number MP 2482.
Since the 4 power amplifier modules 20 are independent and the same, the embodiment only needs to describe one of the independent power amplifier modules 20, and the rest is the same. The power amplifier module 20 includes an independent socket 201, a third transformer module 203, a digital power amplifier module 20420 and a second operational amplifier module 202, a voltage input end of the third transformer module 203 is connected with a voltage input end of the independent socket 201, a voltage output end of the third transformer module 203 is connected with a voltage input end of the digital power amplifier module 20420, a signal input end of the digital power amplifier module 20420 is connected with a signal output end of the second operational amplifier module 202, a signal output end of the digital operational amplifier module is connected with a signal input end of the independent socket 201 and is connected to an original vehicle horn, a signal input end of the second operational amplifier module 202 is connected with a signal input end of the independent socket 201, and the voltage input end and the signal input end of the independent socket 201 are both connected with the output plug 105.
The third voltage transformation module 203 integrates an internal boosting power supply, and can convert a 12V voltage into voltages required by each sub-module in the power amplification module 20, such as 30V, 5V, 10V, 24V, and the like. The digital power amplifier module 20420 adopts a T-type digital power amplifier, and the adopted model is TA2022, which well improves power and tone quality. The second operational amplifier module 202 is of a model NE 5532.
The utility model discloses on-vehicle independent power amplifier circuit's working process or theory of operation: when analog audio signals are input from the outside, the audio DSP processing module 101 processes the input analog signals under the control of the MCU main control module 103, then transmits the processed signals to the first operational amplifier module 104 to be converted into differential signals, and then directly transmits the differential signals to the second operational amplifier module 202 of the power amplifier module 20 for buffering through the output plug 105, and then transmits the audio signals to the digital power amplifier module 20420 to be output to the speaker after the differential signals are converted into single-ended signals, thereby ensuring the simplicity of the signals, when analog and digital audio signals are input externally, the analog audio signals are decoded and converted by a decoding chip CS8416+ CS4398 in the digital audio decoding module and sent to the audio DSP processing module 101 for processing, the analog audio signals are sent to an operational amplifier ICNE5532 in a first operational amplifier module 104 and converted into differential signals, the differential signals are directly sent to a second operational amplifier module 202 of the power amplifier module 20 through an output plug 105 for buffering, the audio signals are sent to the digital power amplifier module 20420 after the differential signals are converted into single ends and then output to a loudspeaker, and the two paths of audio source input signals can be switched and selected through a switch of the host module 10.
A second embodiment of the present invention provides a car audio, which employs the car-mounted independent power amplifier circuit of the first embodiment. This power amplifier output of on-vehicle stereo set directly arrives loudspeaker, has shortened middle line, has improved tone quality greatly, lets listen the person and listen comfortable, can generally promote the travelling comfort of trade product, the extensive popularization of helping hand vehicle navigation product.
The above description is only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings of the utility model, or the direct or indirect application in other related technical fields, are included in the patent protection scope of the utility model.
Claims (9)
1. The utility model provides a vehicle-mounted independent power amplifier circuit which characterized in that: the power amplifier comprises a host module and 4 identical and independent power amplifier modules, wherein the host module is connected with the 4 power amplifier modules through differential signals;
the host module comprises an audio DSP processing module, a digital audio decoding module, an MCU main control module, a first operational amplifier module and an output plug, wherein the signal output end of the MCU main control module is connected with the signal input end of the audio DSP processing module, the signal output end of the digital audio decoding module is connected with the signal input end of the audio DSP processing module, the signal output end of the audio DSP processing module is connected with the signal input end of the first operational amplifier module, and the signal output end of the first operational amplifier module is connected with the signal input end of the output plug;
the power amplifier module comprises an independent socket, a third voltage transformation module, a digital power amplifier module and a second operational amplifier module, wherein the voltage input end of the third voltage transformation module is connected with the voltage input end of the independent socket, the voltage output end of the third voltage transformation module is connected with the voltage input end of the digital power amplifier module, the signal input end of the digital power amplifier module is connected with the signal output end of the second operational amplifier module, the signal output end of the digital power amplifier module is connected with the signal input end of the independent socket and connected with an original vehicle horn, the signal input end of the second operational amplifier module is connected with the signal input end of the independent socket, and the voltage input end and the signal input end of the independent socket are connected with the output plug.
2. The vehicle-mounted independent power amplifier circuit according to claim 1, characterized in that: the model adopted by the MCU master control module is STM 832.
3. The vehicle-mounted independent power amplifier circuit according to claim 1, characterized in that: the model of the digital audio decoding module is CS8416+ CS 4398.
4. The vehicle-mounted independent power amplifier circuit according to claim 1, characterized in that: the models adopted by the first operational amplifier module and the second operational amplifier module are both NE 5532.
5. The vehicle-mounted independent power amplifier circuit according to claim 1, characterized in that: the model number adopted by the digital power amplifier module is TA 2022.
6. The vehicle-mounted independent power amplifier circuit according to claim 1, characterized in that: the host module further comprises a first voltage transformation module, a second voltage transformation module, a power socket and a control and display module, wherein the voltage output end of the power socket is respectively connected with the voltage input end of the first voltage transformation module and the voltage input end of the second voltage transformation module, the voltage output end of the first voltage transformation module is respectively connected with the voltage input end of the first operational amplifier module and the voltage input end of the output plug, the signal output end of the audio DSP processing module is connected with the signal input end of the control and display module, and the voltage output end of the second voltage transformation module is connected with the audio DSP processing module.
7. The vehicle-mounted independent power amplifier circuit according to claim 6, characterized in that: the first transformation module is MP 1401.
8. The vehicle-mounted independent power amplifier circuit according to claim 6, characterized in that: the second transformation module adopts DC/DC and/or adopts a power supply chip with the model number of MP 2482.
9. A car audio, characterized in that: comprising a vehicle mounted stand alone power amplifier circuit as claimed in claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120035397.3U CN213938306U (en) | 2021-01-07 | 2021-01-07 | Vehicle-mounted independent power amplifier circuit and vehicle-mounted sound box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120035397.3U CN213938306U (en) | 2021-01-07 | 2021-01-07 | Vehicle-mounted independent power amplifier circuit and vehicle-mounted sound box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213938306U true CN213938306U (en) | 2021-08-10 |
Family
ID=77157888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120035397.3U Expired - Fee Related CN213938306U (en) | 2021-01-07 | 2021-01-07 | Vehicle-mounted independent power amplifier circuit and vehicle-mounted sound box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213938306U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117528342A (en) * | 2023-11-29 | 2024-02-06 | 先锋高科技(上海)有限公司 | Power amplifier device, audio system and vehicle |
-
2021
- 2021-01-07 CN CN202120035397.3U patent/CN213938306U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117528342A (en) * | 2023-11-29 | 2024-02-06 | 先锋高科技(上海)有限公司 | Power amplifier device, audio system and vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN213938306U (en) | Vehicle-mounted independent power amplifier circuit and vehicle-mounted sound box | |
| CN209183265U (en) | Apparatus for processing audio | |
| CN209710302U (en) | A kind of audio signal switching circuit | |
| CN210042179U (en) | Vehicle-mounted audio system | |
| CN110047482A (en) | A kind of vehicle intelligent charging cable for supporting voice control | |
| CN204836355U (en) | HDMI changes VGA audio frequency and video separator | |
| CN203013250U (en) | Vehicle-mounted intelligent audio switching terminal system | |
| CN202772911U (en) | Multiple-bus mine-used broadcast communication network downhole branch control station based on priority | |
| CN208127569U (en) | A kind of live streaming sound card connects the tone frequency channel wire and live broadcast system of computer or mobile phone | |
| CN206602603U (en) | A kind of rear seat entertainment system for supporting MOST buses | |
| CN203407008U (en) | A vehicle-mounted multimedia system using a loudspeaker box and an earphone as output terminals | |
| JPH1056660A (en) | Circuit device for coupling analog transmission line to digital transmission line | |
| JP2002135883A (en) | On-vehicle audio interface adapter | |
| CN217883810U (en) | A2B audio signal conversion device | |
| CN216957423U (en) | Vehicle-mounted KTV device | |
| CN221615131U (en) | Multipath audio control device based on automatic driving microbar | |
| CN205725661U (en) | A kind of automobile controls and power amplification circuit with DSP digital audio | |
| JP4195807B2 (en) | Audio signal repeater | |
| CN204859357U (en) | HDMI audio frequency separator | |
| CN219761294U (en) | Multifunctional audio system | |
| CN117528342B (en) | Power amplifier device, audio system and vehicle | |
| CN212909938U (en) | Audio circuit is assisted to hearing | |
| CN215529217U (en) | Vehicle-mounted audio system and vehicle-mounted equipment | |
| CN219322461U (en) | Audio interface communication device of entertainment screen and vehicle | |
| CN208300007U (en) | A kind of automobile audio circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210810 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |