CN202841109U - RDS addressable receiver-amplifier - Google Patents
RDS addressable receiver-amplifier Download PDFInfo
- Publication number
- CN202841109U CN202841109U CN 201220314648 CN201220314648U CN202841109U CN 202841109 U CN202841109 U CN 202841109U CN 201220314648 CN201220314648 CN 201220314648 CN 201220314648 U CN201220314648 U CN 201220314648U CN 202841109 U CN202841109 U CN 202841109U
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Abstract
The utility model discloses an RDS addressable receiver-amplifier, which comprises a wireless data decoding circuit and an audio power amplification circuit; the wireless data decoding circuit is composed of a radio chip internal power circuit, a radio frequency detection circuit, a radio frequency demodulation circuit, a stereo decoding circuit and an RDS data decoding circuit which are connected in sequence, radio frequency signals are finally reduced into stereo audio signals and RDS data signals after being processed inside the radio frequency demodulation circuit; and the audio power amplification circuit is composed of a power circuit, an audio pre-amplification circuit and a power amplification circuit, and signals demodulated by a radio chip is output by a loudspeaker after being amplified. The RDS addressable receiver-amplifier has the advantages that the functions of radio frequency input, high-power stereo audio output and data decoding are achieved, the quality of output voice is good, data transmission is stable and reliable, the RDS addressable receiver-amplifier can make full use of the existing coaxial cable network to facilitate signal transmission, and the RDS addressable receiver-amplifier is convenient and practical.
Description
Technical field
The utility model relates to a kind of addressable amplifier equipment, especially relates to a kind of terminal equipment of emergent intelligent broadcast system.
Background technology
Common amplifier only has level switch machine function, and the receiving sensitivity of traditional common radio reception chip, and stereo noise when data transmission performance is all bad, even some chip supported data transfer function not more; A lot of chips or circuit can not low level receive, and when signal was lower than 35dB, sound will produce serious noise, and data more can not reliable reception; Since be subjected to the impact of the structure of traditional die, its peripheral circuit and complexity thereof, the debugging trouble, and high especially to the required precision of components and parts, the performance of complete machine in production and use procedure had a strong impact on;
Traditional amplifier receiving sensitivity is low, and can not realize reliable switching on and shutting down, can not prevent the intrusion of illegal signals, work noise is large, produce debugging and inconvenient, according to above problem, so addressable amplifier of new generation arises at the historic moment, and in emergent intelligent broadcast system, play a part very important.
Summary of the invention
The utility model has overcome shortcoming of the prior art, the addressable amplifier that is input to stereo and data output function from radio frequency that has of a kind of convenience, practicality is provided, can take full advantage of the advantage of coaxial hybrid network, carry out the one-way transmission of audio frequency and data, adopt the RDS wireless data transmission technology, cleverly with data from the front end device transmission to the terminal amplifier.
The technical solution of the utility model is: the addressable amplifier, comprise RDS wireless data decoding circuit and audio power amplifying circuit, described wireless data decoding circuit is connected successively by radio reception chip internal power circuit, radio frequency detection, radio demodulating, stereo decoding, RDS data decode circuitry, after radiofrequency signal enters the demodulator circuit inter-process, finally restore stereo audio signal and RDS data-signal; Audio power amplifier part is comprised of power circuit, audio frequency pre-amplification circuit, power amplification circuit, and the audio signal that the radio reception chip solution is accessed is exported through loudspeaker through after amplifying.
In the inside of described radio frequency testing circuit the RSSI signal strength detection circuit is arranged.
Between described pre-radio demodulating and stereo decoding microcontroller is set, described microcontroller device links to each other with the radio reception chip.
Decoded by microprocessor controls in described RDS data decode circuitry, described microcontroller links to each other with radio reception chip controls mouth.
In described audio power amplifying circuit, system will control according to RDS the state of data, the power supply of power amplification circuit is carried out the opening and closing operation, and addressable controls to each amplifier.
Compared with prior art, the utility model has the advantages that:
1, has higher receiving sensitivity, guarantee when inputting than low level signal, the energy reliably working;
2, has the reliable and stable advantage of transfer of data, adopt the RDS radio data communication mode, under this communication mode, front end adopts the phase shift keying modulation system, compare frequency shift keying and amplitude shift key modulation mode own unique advantage is arranged, data demodulation process restores through chip internal DSP, so that working stability is reliable;
3, can control to each terminal in the front end addressing, and can carry out the search switch machine to terminal according to the state of front-end control signal, and open when needed the terminal amplifier power supply;
4, this amplifier has the automatic channel search function, can revise at any time the reception frequency of amplifier, has stronger adaptive capacity to environment;
5, adopt microprocessor controls radio reception circuit, peripheral circuit is succinct, produces debugging conveniently, and data receiver is reliable and stable, and antijamming capability is strong.
Description of drawings
The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is signal flow schematic diagram of the present utility model.
Embodiment
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
As shown in Figure 1, a kind of addressable amplifier comprises RDS wireless data decoding circuit and audio power amplifying circuit.
RDS wireless data decoded portion comprises radio demodulating, phase-detection, RDS inner decoding and power circuit.Radiofrequency signal according to input, pass through I2C interface initialization radio reception chip by microcontroller, and read chip internal register RDS data message, according to the control information of reading, realization is carried out power management operations to power amplifier simultaneously to relevant controls such as amplifier registration, opening sound volume, broadcast reception frequency, emergent volumes.
If headend equipment does not reliably receive frequency, then amplifier enters the tuning state automatically, and microcontroller is by the control to the radio reception chip, the current controlled frequency of Auto-matching, and according to the requirement of control information, automatically preserve new reception frequency.
The audio signal that power amplification circuit mainly accesses the radio reception chip solution through behind the pre-amplification circuit, is carried out power amplification again, finally outputs to loudspeaker, and unlatching or the closed condition of power amplification circuit are controlled in real time by microcontroller.
Operation principle of the present utility model is:
1, the radiofrequency signal sent here of front end, enter the radio reception chip after, after processing through phase bit comparison, radio demodulating, stereo decoding, RDS internal data, finally restore RDS data-signal and stereo audio signal;
2, microcontroller passes through the control to the radio reception chip, and according to the RDS control data that read, real-time is reflected to power amplification circuit with control information;
3, by the identification to the RDS data, so just accomplish each amplifier is carried out addressing control, and front end data is sent to amplifier.
The above only is preferred embodiment of the present utility model; not in order to limit the utility model; all any modifications of within spirit of the present utility model and principle, doing, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (5)
1.RDS addressable amplifier, it is characterized in that: comprise wireless data decoding circuit and audio power amplifying circuit, described wireless data decoding circuit is connected successively by radio reception chip internal power circuit, radio frequency detection, radio demodulating, stereo decoding, RDS data decode circuitry, after radiofrequency signal enters the demodulator circuit inter-process, finally restore stereo audio signal and RDS data-signal; Audio power amplifier part is comprised of power circuit, audio frequency pre-amplification circuit, power amplification circuit, and the audio signal that the radio reception chip solution is accessed is exported through loudspeaker through after amplifying.
2. RDS addressable amplifier according to claim 1 is characterized in that: in the inside of described radio frequency testing circuit the RSSI signal strength detection circuit is arranged.
3. RDS addressable amplifier according to claim 1, it is characterized in that: between described pre-radio demodulating and stereo decoding microcontroller is set, described microcontroller device links to each other with the radio reception chip.
4. RDS addressable amplifier according to claim 1, it is characterized in that: described RDS data decode circuitry is decoded by microprocessor controls, and described microcontroller links to each other with radio reception chip controls mouth.
5. RDS addressable amplifier according to claim 1, it is characterized in that: in described audio power amplifying circuit, system will control according to RDS the state of data, the power supply of power amplification circuit is carried out the opening and closing operation, and addressable controls to each amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220314648 CN202841109U (en) | 2012-07-02 | 2012-07-02 | RDS addressable receiver-amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220314648 CN202841109U (en) | 2012-07-02 | 2012-07-02 | RDS addressable receiver-amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202841109U true CN202841109U (en) | 2013-03-27 |
Family
ID=47952703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220314648 Expired - Fee Related CN202841109U (en) | 2012-07-02 | 2012-07-02 | RDS addressable receiver-amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202841109U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107195315A (en) * | 2017-07-25 | 2017-09-22 | 成都德芯数字科技股份有限公司 | Audio broadcast control device and method |
-
2012
- 2012-07-02 CN CN 201220314648 patent/CN202841109U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107195315A (en) * | 2017-07-25 | 2017-09-22 | 成都德芯数字科技股份有限公司 | Audio broadcast control device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20150702 |
|
| EXPY | Termination of patent right or utility model |