CN2816924Y - Audio signal converter - Google Patents
Audio signal converter Download PDFInfo
- Publication number
- CN2816924Y CN2816924Y CN 200520063334 CN200520063334U CN2816924Y CN 2816924 Y CN2816924 Y CN 2816924Y CN 200520063334 CN200520063334 CN 200520063334 CN 200520063334 U CN200520063334 U CN 200520063334U CN 2816924 Y CN2816924 Y CN 2816924Y
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- cpu
- analog signal
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Abstract
The utility model discloses a kind of audio-frequency signal converter, form by amplifier, analog to digital converter, EPROM, CPU, wherein the R channel input end of analog signal Rin of amplifier and L channel input end of analog signal Lin are connected on the sound signal input unit, and its R channel analog signal output Rout and L channel analog signal output Lout are connected on the R channel input end of analog signal Rin and the L channel input end of analog signal Lin of analog to digital converter respectively; The output pin of analog to digital converter is connected on the input pin of CPU; The output pin of EPROM is connected on the input pin of CPU; The output pin of CPU links to each other with port on the digital signal follower.
Description
Technical field
The utility model relates to communication technique field, and particularly a kind of is the audio-frequency signal converter of digital signal with analog signal conversion.
Background technology
The audio frequency analog to digital conversion is used widely, is that simulated sound is stored through analog to digital conversion as language playback device, reverts to simulated sound during playback again.
Development along with computer technology, because computer can not directly be handled the sound sort signal, need earlier it to be changed into the digital signal that computer can be discerned, will use the DAC (digital-to-analog conversion) in the sound card, it converts voice signal to digital signal, this need carry out in two steps, sampling and conversion.Sampling is the process that analogue audio frequency is changed into DAB, and used major equipment is analog/digital converter (corresponding is D/A with it, i.e. DAC for Analog to Digital Converter, i.e. ADC).The electrical signal conversion that is actually common simulated audio signal of process of sampling becomes binary code 0 and 1, and these 0 and 1 have just constituted digital audio file.
But audio frequency analog to digital converter of the prior art, sample frequency is lower, and the digital audio and video signals behind the coding is the Parallel Digital sound signal.Therefore, this type of signal is not suitable for the higher sound signal of frequency, and simultaneously, the Parallel Digital sound signal that is produced only is fit to storage, is unfavorable for transmission.
Summary of the invention
The purpose of this utility model provides a kind of audio-frequency signal converter at existing weak point in the above-mentioned prior art just, not only is used for common analog to digital conversion, more can satisfy the requirement to the audio frequency long-distance transmissions.
The utility model can be realized by following measure: the utility model provides a kind of audio-frequency signal converter, form by amplifier, analog to digital converter, EPROM, CPU, it is characterized in that: wherein the R channel input end of analog signal Rin of amplifier and L channel input end of analog signal Lin are connected on the sound signal input unit, and its R channel analog signal output Rout and L channel analog signal output Lout are connected on the R channel input end of analog signal Rin and the L channel input end of analog signal Lin of analog to digital converter respectively; Output pin D1, D2, D3 and the D4 of analog to digital converter is connected on respectively on input pin D1, D2, D3 and the D4 of CPU; Output pin D1, D2, D3 and the D4 of EPROM is connected on respectively on input pin D5, D6, D7 and the D8 of CPU; Output pin D19, D20, D21, D22, D23 and the D24 of CPU links to each other with port on the digital signal follower.
The beneficial effects of the utility model are: simulating signal can be amplified and is converted to digital signal and export, and can satisfy requirement to the audio frequency long-distance transmissions.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is a circuit block diagram of the present utility model.
Fig. 2 is circuit theory diagrams of the present utility model.
Embodiment
As shown in Figures 1 and 2, the utility model is made up of integrated circuit components such as amplifier, analog to digital converter, EPROM, CPU, wherein the R channel input end of analog signal Rin of amplifier and L channel input end of analog signal Lin are connected on the sound signal input unit, and its R channel analog signal output Rout and L channel analog signal output Lout are connected on the R channel input end of analog signal Rin and the L channel input end of analog signal Lin of analog to digital converter respectively; Output pin D1, D2, D3 and the D4 of analog to digital converter is connected on respectively on input pin D1, D2, D3 and the D4 of CPU; Output pin D1, D2, D3 and the D4 of EPROM is connected on respectively on input pin D5, D6, D7 and the D8 of CPU; Output pin D19, D20, D21, D22, D23 and the D24 of CPU links to each other with port on the digital signal follower.
Its principle of work is:
The audio frequency input unit is collected the sound signal of PC sound card, is sent to amplifier thereafter, sound signal is carried out being sent to analog to digital converter after the processing and amplifying in amplifier.In analog to digital converter, signal is carried out analog to digital conversion, obtain digital signal, with this conversion after digital data transmission to CPU, the address date of the EPROM of CPU acquisition is simultaneously handled the digital pulse signal that modulates after this address date and the conversion and the back of encoding is sent out by the port of twisted-pair Ethernet.Be transferred to the main frame of warning system after when this equipment is installed in the front end of audible and visual alarm system host, can converting the sound signal of server sound card to digital signal by Cat5 standard category-5 cable.Good anti-interference can allow transmission range obtain maximum extension, and the signal employing Cat5 standard category-5 cable or the six class lines of output are grown the prime information source converter that Distance Transmission (1000M) can be used for acoustooptic alarm system.
Claims (2)
1. audio-frequency signal converter, it is characterized in that: form by amplifier, analog to digital converter, EPROM, CPU, wherein the R channel input end of analog signal Rin of amplifier and L channel input end of analog signal Lin are connected on the sound signal input unit, and its R channel analog signal output Rout and L channel analog signal output Lout are connected on the R channel input end of analog signal Rin and the L channel input end of analog signal Lin of analog to digital converter respectively; Output pin 1 pin, 2 pin, 3 pin and 4 pin of analog to digital converter are connected on respectively on input pin 1 pin, 2 pin, 3 pin and 4 pin of CPU; Output pin 1 pin, 2 pin, 3 pin and 4 pin of EPROM are connected on respectively on input pin 5 pin, 6 pin, 7 pin and 8 pin of CPU; Output pin 19 pin, 20 pin, 21 pin, 22 pin, 23 pin and 24 pin of CPU link to each other with the port on the digital signal follower.
2. audio-frequency signal converter as claimed in claim 1 is characterized in that: the output terminal of CPU links to each other and the audible and visual alarm system by standard category-5 cable or six class lines, can be used for audible and visual alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520063334 CN2816924Y (en) | 2005-08-24 | 2005-08-24 | Audio signal converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520063334 CN2816924Y (en) | 2005-08-24 | 2005-08-24 | Audio signal converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2816924Y true CN2816924Y (en) | 2006-09-13 |
Family
ID=36996734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520063334 Expired - Fee Related CN2816924Y (en) | 2005-08-24 | 2005-08-24 | Audio signal converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2816924Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102347769A (en) * | 2011-05-26 | 2012-02-08 | 天津大学 | Control circuit of analog-to-digital converter and control method thereof |
-
2005
- 2005-08-24 CN CN 200520063334 patent/CN2816924Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102347769A (en) * | 2011-05-26 | 2012-02-08 | 天津大学 | Control circuit of analog-to-digital converter and control method thereof |
| CN102347769B (en) * | 2011-05-26 | 2013-12-04 | 天津大学 | Control circuit of analog-to-digital converter and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060913 Termination date: 20110824 |