CN1137709A - Automobile mounted radio receiver capable of automatically tuning to local affiliated station - Google Patents
Automobile mounted radio receiver capable of automatically tuning to local affiliated station Download PDFInfo
- Publication number
- CN1137709A CN1137709A CN96102795A CN96102795A CN1137709A CN 1137709 A CN1137709 A CN 1137709A CN 96102795 A CN96102795 A CN 96102795A CN 96102795 A CN96102795 A CN 96102795A CN 1137709 A CN1137709 A CN 1137709A
- Authority
- CN
- China
- Prior art keywords
- group
- radio
- radio station
- frequency
- receiver
- 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.)
- Pending
Links
- 230000005236 sound signal Effects 0.000 claims description 19
- 238000001514 detection method Methods 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 4
- 238000013500 data storage Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
- H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
- H03J7/18—Automatic scanning over a band of frequencies
- H03J7/20—Automatic scanning over a band of frequencies where the scanning is accomplished by varying the electrical characteristics of a non-mechanically adjustable element
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/30—Automatic control in amplifiers having semiconductor devices
- H03G3/3052—Automatic control in amplifiers having semiconductor devices in bandpass amplifiers (H.F. or I.F.) or in frequency-changers used in a (super)heterodyne receiver
Landscapes
- Circuits Of Receivers In General (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
A receiver installed in an automobile includes a main frequency modulator used for receiving expected radio broadcast tuned on a channel of an optimal modulation frequency, a search tuner used for receiving a plurality of audio frequency broadcasts including on a current tuned channel and a plurality of channels of relevant branch broadcast stations of all local simultaneous broadcasts, and a receiver controller used for searching for a plurality of radio broadcasts to select an optimal radio broadcast corresponding to a modulation frequency which is given to a main tuner as the optimal modulation frequency.
Description
The present invention relates to a kind of radio receiver that is installed on the automobile, more particularly, when automobile sails into by local affiliates service regional, can automatically tune to this this locality affiliates, thereby receive the car-radio receiver of same program continuously.
When carrying out wireless transmission, audio signal utilizes radio frequency (RF) carrier signal modulated usually.Can not be because audio frequency is too low by wireless transmission effectively, so this modulation is necessary.In addition, different carrier frequencies are used for different radio broadcasting stations.Each is assigned with the channel of a predetermined frequency band width.This bandwidth is needs for adapting to for the modulated audio signal of predetermined carrier frequency.The channel that is used by these broadcasting stations is typically provided with its allotted channel number.In receiver, by selecting the channel number of a hope, the RF tuner can be tuned to certain predetermined frequency range, i.e. channel, thus receive the desired radio programming of on this channel, broadcasting.
Wish to broadcast under the situation of a radio programming to the whole country simultaneously in the big broadcaster that for example has nationwide network, the broadcasting that program at first is provided for its each this locality divides platform, and then platform is broadcasted on its channel that distributes separately these minutes.Because dividing platform to have, the broadcasting of each this locality distributes to its different channels, so radio programming will be sent out on different channels.Therefore, when receiver enters a specific local area from another zone, must be re-adjusted on the channel of distributing to this locality radio hookup branch platform that covers this specific local area, to receive this program.In other words, when automobile sailed into by this this locality affiliates service regional, the receiver of installing on the automobile was under steam had to by manual tuning to this this locality affiliates.
Therefore, an object of the present invention is to provide a kind of radio receiver that is installed on the automobile, when automobile sails into when dividing regional that platform covers by this locality radio hookup, can automatically tune to this this locality radio hookup under steam and divide on platform, thereby receive identical program continuously.
According to the present invention, a kind of radio receiver that is installed on the automobile is provided,, can automatically tunes to this this locality radio hookup under steam and divide on platform when automobile sails into when dividing of platform service regional by this locality radio hookup, thereby receive identical program continuously, described radio receiver comprises:
A plurality of options buttons, each options button are used for selecting one of a plurality of radio broadcastings radio station group, and each group comprises that a main platform and each local radio hookup thereof divide platform;
Be used to store the device of the tuning information of each radio station group, this tuning information comprises one group of modulating frequency, and each identification in this group modulating frequency is included in a radio station in each radio station group;
In response to a command signal of indicating the radio station group of selecting, be used for from the device of respectively organizing one of modulating frequency of storage device taking-up corresponding to the radio station group of selecting;
A search tuning device is used for sequentially and repeatedly receiving corresponding to the audio signal in each modulating frequency of institute's taking-up group;
Be used to produce the device of direct voltage of the peak value of the audio signal that is proportional to each reception;
Be used for these direct voltages are carried out mutually relatively to select a device that causes the optimum modulation frequency of highest voltage level from the modulating frequency group of taking out; With
Be used to receive main tuner corresponding to the audio signal of this optimum modulation frequency.
Above-mentioned and other purposes of the present invention and characteristics will be conspicuous in conjunction with the accompanying drawings to the description of following preferred embodiment, and Fig. 1 has represented one according to the block diagram that is installed in the radio receiver on the automobile of the present invention.
Referring now to accompanying drawing, wherein represent one according to the block diagram that is installed in the radio receiver 100 on the automobile of the present invention, this radio receiver 100 can automatically tune to this this locality affiliates in the time of in automobile sails into by the zone of a local affiliates service.
In general, the big broadcaster with national network comprises a control station and one or more local radio hookup branches radio station, and each local radio hookup branch radio station has a service area of distributing to it.The radio programming that control station is modulated by a predetermined modulation or carrier frequency by the channel radio of its distribution; And each local affiliates picks up radio programming from control station, and broadcasted in its service area scope by the channel of its distribution.
Be used to change the gain of main tuner 14 with the variation in this direct current signal as a gain control signal from the direct voltage of audio detection device 18.Therefore, the effect of audio detection device 18 by direct voltage can keep the constant level from wherein audio signal.The 4.5MHZ audio signal that detects is driven the loud speaker 34 that is used for the hearer by the voice signal that audio frequency amplifier 32 amplifies to produce a required amplification.
The key-press matrix 10 that is included in the receiver 100 is provided with a plurality of keys that are used to select one of a plurality of radio station group, and wherein each radio station group comprises a control station and the local radio hookup of Qi Ge branch radio station.According to the present invention, the selection of radio station group is to be undertaken by the service name of its network of expression of distributing to each radio station group, rather than passes through channel number.Therefore, by selecting service names, when sailing an other service area into, a service area needn't need to be changed to new channel number at each automobile from key-press matrix 10.When making a radio station group selected by a key of selecting from key-press matrix 10 by, representative selects a command signal of a radio station group to be applied on the receiver controller 20.
Can be used to store the tuning information of relevant each radio station group by the data storage 30 that a look-up table is formed.This tuning information comprises one group of modulating frequency, each modulating frequency be used to discern each radio station that is included in corresponding in the radio station group of modulating frequency group.
The receiver controller 20 that can be made up of a microprocessor takes out one group of modulating frequency corresponding to this selected radio station group in response to the command signal from key-press matrix 10 from data storage 30.Sequentially reached in this group modulating frequency of being taken out and repeatedly to be offered search tuning device 24.
The search tuning device 24 that is connected to antenna 22 sequentially and repeatedly receives all audio signals from each radio station in the group of selected radio station, and the radio station in the radio station group of this selection is to be discerned by this group modulating frequency of taking out from data storage 30.The audio signal that is received by search tuning device 24 is sequentially reached repeatedly is provided to IF amplifier 26.
At receiver controller 20, select a modulating frequency that produces highest voltage level in the modulating frequency that these direct current signals are compared with each other and take out with this group.The modulating frequency of this selection is applied to main tuner 14, as the optimum modulation frequency that is used for tuning MAIN MUX to receive desirable audio signal.
Therefore, utilize a kind of like this radio receiver, might monitor desirable radio broadcasting continuously, it also is like this moving under the another one service area situation of being served by another local affiliates at automobile from a service area that is covered by a local radio hookup branch radio station even.
Though the present invention has been carried out description with reference to specific embodiment, making variations and modifications under not breaking away from by following spirit of the present invention that claims limited and scope situation will be conspicuous for the professional and technical personnel.
Claims (2)
1. radio receiver that is installed on the traveling automobile when automobile sails into by local radio hookup branchs a radio station service regional, can automatically tune to this this locality and broadcast the branch radio station, thereby receive identical program continuously, and described radio receiver comprises:
A plurality of options buttons, each options button is used to select one of a plurality of radio broadcasting station groups, and each group comprises that a main platform and local radio hookup thereof divide platform;
Be used to store the device of the tuning information of each radio station group, this tuning information comprises one group of modulating frequency, and each frequency identification in this group modulating frequency is included in one of radio station in each radio station group;
In response to a command signal of indicating the radio station group of selecting, be used for from the device of storage device taking-up corresponding to one group of modulating frequency of the radio station group of selecting;
The search tuning device is used for sequentially reaching an audio signal that repeatedly receives corresponding in each modulating frequency of the group of taking out;
Be used to produce the device of the direct voltage of the peak value that is proportional to each audio signal that receives;
Be used for these direct voltages mutually relatively to select a device that produces the optimum modulation frequency of highest voltage level from this group modulating frequency of taking out; And
Main tuner is used to receive the audio signal corresponding to this optimum modulation frequency.
2. the receiver of claim 1, wherein the selection of radio station group is undertaken by service name, and this title is distributed to each radio station group to represent its network.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019950004961U KR960032943U (en) | 1995-03-21 | 1995-03-21 | Car stereo tuning equipment |
| KR4961/95-U | 1995-03-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1137709A true CN1137709A (en) | 1996-12-11 |
Family
ID=19409565
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96102795A Pending CN1137709A (en) | 1995-03-21 | 1996-03-20 | Automobile mounted radio receiver capable of automatically tuning to local affiliated station |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH08274591A (en) |
| KR (1) | KR960032943U (en) |
| CN (1) | CN1137709A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100542026C (en) * | 2002-06-07 | 2009-09-16 | Nxp股份有限公司 | The method and apparatus that is used for automatic tuning radio FM receiver |
| CN1574657B (en) * | 2003-06-06 | 2010-04-28 | 三菱电机株式会社 | Receiving arrangement |
| CN104284225A (en) * | 2013-07-05 | 2015-01-14 | 歌乐株式会社 | Vehicle navigation device |
-
1995
- 1995-03-21 KR KR2019950004961U patent/KR960032943U/en not_active Application Discontinuation
-
1996
- 1996-03-20 CN CN96102795A patent/CN1137709A/en active Pending
- 1996-03-21 JP JP8092004A patent/JPH08274591A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100542026C (en) * | 2002-06-07 | 2009-09-16 | Nxp股份有限公司 | The method and apparatus that is used for automatic tuning radio FM receiver |
| CN1574657B (en) * | 2003-06-06 | 2010-04-28 | 三菱电机株式会社 | Receiving arrangement |
| CN104284225A (en) * | 2013-07-05 | 2015-01-14 | 歌乐株式会社 | Vehicle navigation device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08274591A (en) | 1996-10-18 |
| KR960032943U (en) | 1996-10-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |