CN1121782C - Colour TV set with FM radio function - Google Patents
Colour TV set with FM radio function Download PDFInfo
- Publication number
- CN1121782C CN1121782C CN00110903A CN00110903A CN1121782C CN 1121782 C CN1121782 C CN 1121782C CN 00110903 A CN00110903 A CN 00110903A CN 00110903 A CN00110903 A CN 00110903A CN 1121782 C CN1121782 C CN 1121782C
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Abstract
The present invention relates to a colour TV set with a frequency modulation (FM) radio function, which has good receiving effect and can simply realize the function of frequency modulation reception. The frequency modulation radio function of the TV set with an FM radio function is realized by that a high-frequency tuner, an intermediate frequency amplifier, and a vision intermediate frequency discriminator of the TV set are matched with an MPU of the TV set. The present invention has perfect tuning function, automatic memory function for FM station frequency and position number, display function for tuning screens, and memory function for multiple-station positions. If only receiving monophony programs, the TV set scarcely increases cost. Even if receiving stereo programs, the TV set only needs to be added with a stereo decoder with low cost to realize receiving the stereo programs. Thus, the present invention has high economic value.
Description
Technical field
The invention belongs to electronic technology field, the acoustic processing scheme when being specifically related on original color television set, add FM broadcasting program receiving function.
Background technology
General color television set does not possess the function that receives the FM broadcasting program at present.And general FM receiver is the intermediate-freuqncy signal that the frequency-modulation broadcasting signal mixing produces 10.7MHZ, and frequency discrimination produces audio signal after what amplifies.If with this mode be grafted directly in the color television set can not with the fine fusion of the voice signal of television set, can not be implemented in increases the purpose that receives the FM broadcasting program in the color television set.
Summary of the invention
The objective of the invention is for addressing the above problem, provide a kind of can simple realization FM reception function, the color television set of the band FM radio that reception is good.
For reaching the problems referred to above, the present invention realizes like this, a kind of color television set with FM radio, the image processing section and the sound processing section that comprise color television set, wherein the acoustic processing of television set partly is made up of signal receiving antenna, high-frequency tuner, microprocessor, intermediate frequency amplifier, audio discriminator, audio frequency control and power amplifier and loud speaker.
This color television set also has the output of a reception intermediate frequency amplifier, and the audio frequency that is used for therefrom isolating FM signal detects and automatic frequency tuning (AFT) frequency discriminator control device;
With one be used to select export the television audio signals of audio discriminator output or audio frequency detects and the FM signal and the TV signal switch of the FM signal of automatic frequency tuning frequency discriminator control device output;
The switching controls end of described FM signal and TV signal switch is connected the switching signal output of television set microprocessor;
The output of described FM signal and TV signal switch is connected audio frequency control and power amplifier.
Above-mentioned audio frequency detects and the output of automatic frequency tuning frequency discriminator control device connects a FM multiplex decoder that is used for FM signal is demodulated to left and right acoustic channels output;
The output of above-mentioned audio discriminator connects a television stereo decoding circuit that is used for television audio signals is demodulated to left and right acoustic channels output;
Above-mentioned FM signal and TV signal switch switch described stereo output.
Above-mentioned automatic frequency tuning frequency discriminator is common to the automatic frequency tuning frequency discrimination of frequency modulation frequency discrimination and TV.
Above-mentioned FM signal and TV signal switch adopt three road alternative chips (N1), and its model is TC4053, and the Y0 of this chip, Z0 input connect the frequency modulated sound signal, and its Y1, Z1 input connect television audio signals; Its two-way X input connects the automatic frequency tuning signal input of TV jointly by triode trigger switch (V1).
Advantage of the present invention and good effect are, the FM radio of FM radio television set of the present invention is compared with general FM receiver, and its function of radio receiver is to adopt the high-frequency tuner of television set and the microprocessor of intermediate frequency amplifier and vision intermediate frequency frequency discriminator cooperation television set to finish.Its tuber function is more perfect, has not only realized electronic tuning, also has frequency and the automatic memory function of location number, tuning screen display function and many station locations memory function in frequency modulation (FM) broadcasting station.Compare with frequency modulation (FM) broadcast receiver of general electronic tuning, have that outage is not lost, tuning screen display function.As only receiving the monophony program, television set need increase cost hardly.Even also only need increasing a very low stereodecoder of cost, just can realize the reception stereophonic program.Therefore has very high economic worth.
Description of drawings
Fig. 1 is the circuit structure block diagram of the embodiment of the invention one;
Fig. 2 is the circuit structure block diagram of the embodiment of the invention two;
Fig. 3 is the FM signal of the embodiment of the invention two and the circuit diagram that TV signal is switched.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Embodiment one:
As shown in Figure 1, a kind of color television set with FM radio, the image processing section and the sound processing section that comprise color television set, wherein the acoustic processing of television set partly is made up of the microprocessor of signal receiving antenna, high-frequency tuner, intermediate frequency amplifier, audio discriminator, audio frequency control and power amplifier, loud speaker and television set.
When receiving only monaural FM broadcasting program, this color television set also has the output of a reception intermediate frequency amplifier, and the audio frequency that is used for therefrom isolating FM signal detects and automatic frequency tuning frequency discriminator control device;
With one be used to select export the television audio signals of audio discriminator output or audio frequency detects and the FM signal and the TV signal switch of the FM signal of automatic frequency tuning frequency discriminator control device output;
The switching controls end of described FM signal and TV signal switch is connected the switching signal output of television set microprocessor;
The output of described FM signal and TV signal switch is connected audio frequency control and power amplifier.
Embodiment two:
As shown in Figure 2, if will receive stereosonic program, then its audio frequency detects and the output of automatic frequency tuning frequency discriminator control device connects a FM multiplex decoder that is used for FM signal is demodulated to left and right acoustic channels output on the basis of embodiment one;
The output of its audio discriminator connects a television stereo decoding circuit that is used for television audio signals is demodulated to left and right acoustic channels output;
Above-mentioned FM signal and TV signal switch switch described stereo output.
As shown in Figure 3, frequency modulation discriminator adopts the automatic frequency tuning frequency discriminator of original television set, and the stereodecoder model is TA7343AP and peripheral circuit thereof, and FM signal and TV signal switch adopt three road alternative chip N1, and its model is TC4053.The left and right sound track signals of 8 pin of stereodecoder TA7343AP and the isolated frequency modulated sound signal of 9 pin connects Y0, the Z0 of three road alternative chip N1, and the left and right sound track signals of TV connects Y1, the Z1 of three road alternative chip N1; Its two-way X input connects the input of TV AFT signal jointly by triode trigger switch V1, the trigger end of this triode connects the automatic frequency tuning signal of TV, common SW (switch) signal that connects the automatic frequency tuning frequency discriminator of A, the B of three road alternative chip N1, C end.The X output output automatic frequency tuning signal of this three road alternatives chip N1, Y, Z output output left and right sound track signals.
Claims (3)
1. color television set with FM radio, the image processing section and the sound processing section that comprise color television set, wherein the acoustic processing of television set partly is that microprocessor by signal receiving antenna, high-frequency tuner, intermediate frequency amplifier, audio discriminator, audio frequency control and power amplifier, loud speaker and television set constitutes, and it is characterized in that: the high-frequency tuner of fm radio circuit, intermediate frequency amplifier and frequency modulation discriminator the are shared high-frequency tuner of TV, image intermediate frequency amplifier and automatic frequency tuning frequency discriminator.
This color television set also has the output of a reception intermediate frequency amplifier, and the audio frequency that is used for therefrom isolating FM signal detects and automatic frequency tuning frequency discriminator control device;
With one be used to select export the television audio signals of audio discriminator output or audio frequency detects and the FM signal and the TV signal switching device shifter of the FM signal of automatic frequency tuning frequency discriminator control device output;
The switching controls end of described FM signal and TV signal switching device shifter is connected the switching signal output of television set microprocessor;
The output of described FM signal and TV signal switching device shifter is connected audio frequency control and power amplifier.
2. the color television set of band FM radio according to claim 1 is characterized in that:
Above-mentioned audio frequency detects and the output of automatic frequency tuning frequency discriminator control device connects a FM multiplex decoder that is used for FM signal is demodulated to left and right acoustic channels output;
The output of above-mentioned audio discriminator connects a television stereo decoding circuit that is used for television audio signals is demodulated to left and right acoustic channels output;
Above-mentioned FM signal and TV signal switching device shifter switch described stereo output.
3. the color television set of band FM radio according to claim 1 is characterized in that:
Above-mentioned FM signal and TV signal switching device shifter adopt three road alternative chips (N1), and its model is TC4053, and the Y0 of this chip, Z0 input connect the frequency modulated sound signal, and its Y1, Z1 input connect the sound of television signal; Its two-way X input is imported by the automatic frequency tuning signal that triode (V1) connects TV jointly, and the base stage of this triode connects the automatic frequency tuning signal of TV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00110903A CN1121782C (en) | 2000-02-23 | 2000-02-23 | Colour TV set with FM radio function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00110903A CN1121782C (en) | 2000-02-23 | 2000-02-23 | Colour TV set with FM radio function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1274232A CN1274232A (en) | 2000-11-22 |
| CN1121782C true CN1121782C (en) | 2003-09-17 |
Family
ID=4580859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN00110903A Expired - Fee Related CN1121782C (en) | 2000-02-23 | 2000-02-23 | Colour TV set with FM radio function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1121782C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100525407C (en) * | 2005-05-26 | 2009-08-05 | 海尔集团公司 | TV set with FM receiver function |
| CN101990074A (en) * | 2009-08-03 | 2011-03-23 | 康佳集团股份有限公司 | Television with audio playing function |
| CN101674396B (en) * | 2009-10-28 | 2012-04-18 | 四川长虹电器股份有限公司 | Set top box with frequency modulation radio function and operation method thereof |
| CN102118586B (en) * | 2009-12-31 | 2013-08-14 | 深圳Tcl新技术有限公司 | Television with custom broadcasting function display mode |
-
2000
- 2000-02-23 CN CN00110903A patent/CN1121782C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1274232A (en) | 2000-11-22 |
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| 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: 20030917 Termination date: 20120223 |