CN103402167A - Network type digital power amplifier - Google Patents
Network type digital power amplifier Download PDFInfo
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- CN103402167A CN103402167A CN2013103587287A CN201310358728A CN103402167A CN 103402167 A CN103402167 A CN 103402167A CN 2013103587287 A CN2013103587287 A CN 2013103587287A CN 201310358728 A CN201310358728 A CN 201310358728A CN 103402167 A CN103402167 A CN 103402167A
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- power amplifier
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- network interface
- network
- power supply
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Abstract
The invention provides a network type digital power amplifier which comprises a power supply input terminal, an LLC (Logic Link Control) switching power supply, a network interface, a network card, a CPU (Central Processing Unit), a sound card and a digital power amplifier, wherein the power supply input terminal is connected with the LLC switching power supply; the LLC switching power supply is used for supplying direct current for the network card, the CPU, the sound card and the digital power amplifier respectively; a digital audio signal is transmitted to the network card, the CPU and the sound card in sequence through the network interface, and is output after passing through the digital power amplifier. The audio part of the network type digital power amplifier adopts the network interface (RJ45) to transmit and receive digital audio streams, the circuit is simple, the voice Broadcast content is rich and the use is convenient; the power amplification part of the type digital power amplifier adopts D type power amplification, the power consumption is low, the efficiency is high and radiating fins are omitted.
Description
Technical field
The invention belongs to the broadcasting equipment field, relate in particular to a kind of light rail that is applicable to, the public voice broadcast service system of the field of traffic such as subway.
Background technology
The power unit of tradition level pressure power amplifier adopts power transformer to add the rectifying and voltage-stabilizing module, and owing to belonging to linear power supply, efficiency is low, and volume is large; The power tube of power amplifier part all is operated in linear magnification region while working, it controls the size of output according to the size of input audio signal, just as the power transformation resistance of string in power supply and outlet chamber, control output, but self is also consuming electric energy simultaneously, and efficiency is low, and loss is large; Output is added with the output audio transformer, is used for the conversion of voltage; Equipment own wt weight, volume is large.
Summary of the invention
For the deficiencies in the prior art, the problem to be solved in the present invention is to provide a kind of lightweight, the network digital power amplifier of no-output audio frequency transformer.
Technical scheme of the present invention is:
A kind of network digital power amplifier, comprise power input, LLC Switching Power Supply, network interface, network interface card, CPU, sound card and digital power amplifier, described power input connects described LLC Switching Power Supply, described LLC Switching Power Supply is respectively described network interface card, described CPU, described sound card and described digital power amplifier DC power supply is provided, digital audio and video signals sends described network interface card, described CPU and described sound card to successively through described network interface, exports after described digital power amplifier.
Described power input meets AC220V.
Described digital power amplifier is D class power amplifier.
Described network interface adopts the RJ45 network interface.
Advantage and good effect that the present invention has are: 1. audio-frequency unit has been taked Adoption Network interface (RJ45) transmitting-receiving digital audio stream, and advanced means make circuit part more succinct, and the voice broadcast service content is abundanter, uses more convenient; 2. power amplifier partly adopts the power amplification of D class, and is different from the power tube operating state of traditional power amplifier, and the power tube of D class power amplifier is operated on off state, and power consumption is little, efficiency is high, saved in the past thick and heavy fin, alleviated the weight of equipment; 3. power unit application LLC resonant switch power supply has replaced power transformer and this part of rectifying and voltage-stabilizing module of traditional power amplifier, efficiency is up to 94%, and the power utilization rate is high, has greatly alleviated the weight of equipment, reduce the volume of equipment, broken the unmatched traditional concept of Switching Power Supply and power amplifier; 4. output is also the most important that the network digital power amplifier is different from traditional level pressure power amplifier, there is no exactly to be used for the output audio transformer of voltage transformation, the network digital power amplifier has been selected the special-purpose power tube of digital power amplifier, the efficient utilization of power tube to power supply, realized this important breakthrough, and make the distortion of power amplifier, frequency response, the indexs such as signal to noise ratio are more excellent.
Description of drawings
Fig. 1 is structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing, specific embodiments of the invention are elaborated:
As shown in Figure 1: a kind of network digital power amplifier, comprise power input, LLC Switching Power Supply, network interface, network interface card, CPU, sound card and digital power amplifier, described power input connects described LLC Switching Power Supply, described LLC Switching Power Supply is respectively described network interface card, described CPU, described sound card and described digital power amplifier DC power supply is provided, digital audio and video signals sends described network interface card, described CPU and described sound card to successively through described network interface, exports after described digital power amplifier.
Described power input meets AC220V.
Described digital power amplifier is the D power-like amplifier.
Described network interface adopts the RJ45 network interface.
The network digital power amplifier mainly contains following characteristics: (1) Adoption Network interface transmitting-receiving digital audio stream; (2) adopt the power amplification of D class, efficiency high (more than 90%); (3) power unit adopts LLC resonant switch power supply; (4) no-output audio frequency transformer.
Network digital power amplifier working mechanism:
1. power unit
Network digital amplifier power supply input is AC220V, through the LLC Switching Power Supply, is transformed into the direct current that CPU, network interface card, sound card and digital power amplifier need, and gives above-mentioned each unit power supply.
2. audio-frequency unit
Network digital power amplifier digital audio is inputted network interface card by network interface, and through the network interface card processing of decoding, the sound card on 10G CPU Control Unit converts the analogue audio frequency of output voltage sampling and output current sampling to digital audio, for remote monitoring or dynamically show.
3. power amplifier part
Power amplifier is mainly completed the power amplification of audio signal, is input to the audio frequency of power board after the power amplification of D class, directly output.
Above one embodiment of the present of invention are had been described in detail, but described content is only preferred embodiment of the present invention, can not be considered to be used to limiting practical range of the present invention.All equalizations of doing according to the present patent application scope change and improve etc., within all should still belonging to patent covering scope of the present invention.
Claims (4)
1. network digital power amplifier, it is characterized in that: comprise power input, LLC Switching Power Supply, network interface, network interface card, CPU, sound card and digital power amplifier, described power input connects described LLC Switching Power Supply, described LLC Switching Power Supply is respectively described network interface card, described CPU, described sound card and described digital power amplifier DC power supply is provided, digital audio and video signals sends described network interface card, described CPU and described sound card to successively through described network interface, exports after described digital power amplifier.
2. network digital power amplifier according to claim 1, it is characterized in that: described power input meets AC220V.
3. network digital power amplifier according to claim 1, it is characterized in that: described digital power amplifier is the D power-like amplifier.
4. network digital power amplifier according to claim 1, is characterized in that: described network interface employing RJ45 network interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103587287A CN103402167A (en) | 2013-08-15 | 2013-08-15 | Network type digital power amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103587287A CN103402167A (en) | 2013-08-15 | 2013-08-15 | Network type digital power amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103402167A true CN103402167A (en) | 2013-11-20 |
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ID=49565669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103587287A Pending CN103402167A (en) | 2013-08-15 | 2013-08-15 | Network type digital power amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103402167A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202223800U (en) * | 2011-09-28 | 2012-05-23 | 西安建筑科技大学 | Visible fire fighting linkage device for fire detection and people diversion |
| CN202261691U (en) * | 2011-11-07 | 2012-05-30 | 武汉钢铁(集团)公司 | IP (Internet Protocol)-network-based conversation station |
| CN102932158A (en) * | 2012-09-28 | 2013-02-13 | 天津市北海通信技术有限公司 | Double-network-interface unit for network type all-digital broadcasting system |
| CN203407017U (en) * | 2013-08-15 | 2014-01-22 | 天津市北海通信技术有限公司 | Network type digital power amplifier |
-
2013
- 2013-08-15 CN CN2013103587287A patent/CN103402167A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202223800U (en) * | 2011-09-28 | 2012-05-23 | 西安建筑科技大学 | Visible fire fighting linkage device for fire detection and people diversion |
| CN202261691U (en) * | 2011-11-07 | 2012-05-30 | 武汉钢铁(集团)公司 | IP (Internet Protocol)-network-based conversation station |
| CN102932158A (en) * | 2012-09-28 | 2013-02-13 | 天津市北海通信技术有限公司 | Double-network-interface unit for network type all-digital broadcasting system |
| CN203407017U (en) * | 2013-08-15 | 2014-01-22 | 天津市北海通信技术有限公司 | Network type digital power amplifier |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131120 |