CN202190275U - Mobile frequency-modulated broadcast transmitter - Google Patents
Mobile frequency-modulated broadcast transmitter Download PDFInfo
- Publication number
- CN202190275U CN202190275U CN2011202848572U CN201120284857U CN202190275U CN 202190275 U CN202190275 U CN 202190275U CN 2011202848572 U CN2011202848572 U CN 2011202848572U CN 201120284857 U CN201120284857 U CN 201120284857U CN 202190275 U CN202190275 U CN 202190275U
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- China
- Prior art keywords
- frequency
- electrically connected
- broadcast transmitter
- modulated broadcast
- stereo
- 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
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Abstract
The utility model relates to a broadcast transmitter, in particular to a vehicular stereo frequency-modulated broadcast transmitter with a USB (universal serial bus) disk playing function. An input end of a double-track preamplifier is electrically connected with a microphone and a USB disk stereo decompression circuit, an output end of the double-track preamplifier is electrically connected with an input end of a stereo encoder, an output end of the stereo encoder is electrically connected with an input end of an FM frequency modulator, an output end of the FM modulator is electrically connected with an input end of a radio-frequency power amplifier, an output end of the radio-frequency power amplifier is electrically connected with a sucker antenna, the FM modulator is further electrically connected with a frequency display circuit, and the radio-frequency power amplifier is further electrically connected with a transmitter parameter testing circuit. The vehicular stereo frequency-modulated broadcast transmitter has the advantages of accurate and stable frequency, excellent bandwidth matching, high-fidelity stereo sound effect, beautiful and clear sound and the like.
Description
Technical field
The utility model relates to a kind of broadcast transmitter, particularly a kind ofly is used for the vehicle-mounted frequency modulating stereo transmitter with USB flash disk playing function.
Background technology
Vehicle-mounted transmitter on the existing market is to adopt the narrow-band FM mode, generally uses as intercom.Therefore its frequency response is poor, and its frequency response index is 300-3400Hz, can only be used for conversation, can not be used for language and music broadcast.
The utility model content
The utility model purpose provides that a kind of frequency is accurately stable, bandwidth, coupling is good, clear stereo is imitated, the tonequality grace moves frequency-modulated broadcast transmitter clearly.
The utility model technical scheme: a kind of mobile frequency-modulated broadcast transmitter; Dual track preamplifier input is electrically connected microphone and the stereo decompression circuit of USB flash disk; Dual track preamplifier output is electrically connected with the stereophonic encoder input; The stereophonic encoder output is electrically connected with FM modulator input, and FM modulator output is electrically connected with the RF power amplification input, and the RF power amplification output is electrically connected with the sucker antenna; The FM modulator also is electrically connected frequency display circuit, and RF power amplification also is electrically connected the transmitter parameter test circuit.
Stereophonic encoder is BH1417.
RF power amplification is 15W-50W.
Frequency adjustable, frequency response index are 50-15000Hz, and step-length is 0.1MHz.
The automobile cigarette lighter power supply provides to moving frequency-modulated broadcast transmitter+the stable DC working power of 12V and+24V after automobile power source inverter and Switching Power Supply are handled.
The automobile power source inverter is 500W.
The stereophonic encoder of the utility model adopts import BH1417 integrated circuit, and circuit design is succinct, and stereophonic effect is good, and the tonequality grace is clear; The USB flash disk playing function, but both single play, also broadcast capable of circulation; Be provided with data detection system, be convenient to understand at any time the operating state of machine; Frequency adjustable, frequency response index are 50-15000Hz.
Description of drawings
Fig. 1 is the utility model block diagram.
Fig. 2 is the utility model working power block diagram.
Embodiment
The utility model has adopted new and high technologies such as the advanced microcomputer chip of American ATMEL and digital phase-locking phase, flash storage, stereo coding, MP3 music, overall with band.So these facility have characteristics such as frequency is accurately stable, the bandwidth coupling is good, clear stereo is imitated, the tonequality grace is clear.This mechanism fabrication technique is advanced, good looking appearance is generous, user-friendly for operation, easy to carry.Therefore be widely used in administrative public affair and visit examination fleet, promptly speedily carry out rescue work fleet, fleet of self-driving travel club, open-air drive-in cinema and broadcasting station, town and country.
The dual track preamplifier of the utility model simultaneously with about the audio signal of two sound channels amplify;
The stereo decompression circuit of USB flash disk can be separated compressed MP3 audio signal and be pressed into common stereo audio signal;
Stereo audio signal behind microphone and the USB flash disk decompress(ion) is delivered to the BH1417 stereophonic encoder and is encoded after the dual track preamplifier amplifies, become the so-called stereo composite signal of being made up of stereo and poor code signal and stereo audio signal;
The FM modulator is a frequency interleaved modulation modulator, and stereo composite signal is delivered to this modulator and modulated, and at this moment, stereo composite signal is modulated onto radiofrequency signal (ultra-high frequency signal) and gets on;
The 15W-50W RF power amplification is a radio-frequency power amplifier, and it will amplify from the faint radiofrequency signal of FM modulator, make its power reach 15W-50W, launched in the air by sucker sky alignment then;
The sucker antenna is a kind ofly can radio-frequency current be transformed into electromagnetic device.
Frequency display circuit is used to show the tranmitting frequency of transmitter, shows with LED.As: 90MHz.
The transmitter parameter test circuit is used for the technical indicators such as frequency deviation, electric current and transmitting power of test receiver, shows with gauge outfit.
Cigarette lighter socket can provide the direct voltage of 12V on the automobile, and the automobile inverter becomes the direct voltage of 12V into the alternating voltage of 220V, and Switching Power Supply becomes the alternating voltage of 220V+and the galvanic current of 12V and+24V presses, and supplies entire machine work.
Detailed description is not prior art.
This machine function and characteristics:
1, adopts the wireless frequency modulation emission of 15W-50W power, the removable emission of transmitter.
2, stereophonic encoder adopts import BH1417 integrated circuit, and circuit design is succinct, and stereophonic effect is good, and the tonequality grace is clear.
3, USB flash disk playing function.But both single broadcasts, also broadcast capable of circulation.The played file form is MP3.
4, use the automobile cigarette lighter power drives, be furnished with 500W vehicle power inverter.
5, adopt specialized aviation aluminium shell.The handle of being furnished with the plastic-aluminum structure.Easy to carry.
6, be provided with data detection system, be convenient to understand at any time the operating state of machine.
7, frequency adjustable, step-length are 0.1MHz.Frequency adjustment switch is embedded, avoids inoperative personnel misoperation.
8, technical target of the product meets the GB4312.1-84 of People's Republic of China (PRC) frequency-modulated broadcast transmitter standard
What this machine adopted is WBFM, and its frequency response index is 50-15000Hz, is the language and the music broadcast transmitter of specialty, and fidelity is high, and tonequality is graceful.Be used for the broadcasting of vehicle-mounted music and language.
Claims (6)
1. mobile frequency-modulated broadcast transmitter; It is characterized in that: dual track preamplifier input is electrically connected microphone and the stereo decompression circuit of USB flash disk; Dual track preamplifier output is electrically connected with the stereophonic encoder input; The stereophonic encoder output is electrically connected with FM modulator input, and FM modulator output is electrically connected with the RF power amplification input, and the RF power amplification output is electrically connected with the sucker antenna; The FM modulator also is electrically connected frequency display circuit, and RF power amplification also is electrically connected the transmitter parameter test circuit.
2. according to the said a kind of mobile frequency-modulated broadcast transmitter of claim 1, it is characterized in that: stereophonic encoder is BH1417.
3. according to the said a kind of mobile frequency-modulated broadcast transmitter of claim 1, it is characterized in that: RF power amplification is 15W-50W.
4. according to the said a kind of mobile frequency-modulated broadcast transmitter of claim 1, it is characterized in that: frequency adjustable, frequency response index are 50-15000Hz, and step-length is 0.1MHz.
5. according to the said a kind of mobile frequency-modulated broadcast transmitter of claim 1, it is characterized in that: the automobile cigarette lighter power supply provides to moving frequency-modulated broadcast transmitter+the stable DC working power of 12V and+24V after automobile power source inverter and Switching Power Supply are handled.
6. according to the said a kind of mobile frequency-modulated broadcast transmitter of claim 5, it is characterized in that: the automobile power source inverter is 500W.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202848572U CN202190275U (en) | 2011-08-08 | 2011-08-08 | Mobile frequency-modulated broadcast transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202848572U CN202190275U (en) | 2011-08-08 | 2011-08-08 | Mobile frequency-modulated broadcast transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202190275U true CN202190275U (en) | 2012-04-11 |
Family
ID=45921709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202848572U Expired - Fee Related CN202190275U (en) | 2011-08-08 | 2011-08-08 | Mobile frequency-modulated broadcast transmitter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202190275U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978586A (en) * | 2016-06-29 | 2016-09-28 | 广西大学 | FM (Frequency Modulation) transmitting system based on Android platform |
| CN106027081A (en) * | 2016-06-29 | 2016-10-12 | 广西大学 | Full-band intelligent and adjustable FM transmitter |
-
2011
- 2011-08-08 CN CN2011202848572U patent/CN202190275U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978586A (en) * | 2016-06-29 | 2016-09-28 | 广西大学 | FM (Frequency Modulation) transmitting system based on Android platform |
| CN106027081A (en) * | 2016-06-29 | 2016-10-12 | 广西大学 | Full-band intelligent and adjustable FM transmitter |
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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: 20120411 Termination date: 20120808 |