CN101707492A - Wireless receiving device - Google Patents
Wireless receiving device Download PDFInfo
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- CN101707492A CN101707492A CN200910252079A CN200910252079A CN101707492A CN 101707492 A CN101707492 A CN 101707492A CN 200910252079 A CN200910252079 A CN 200910252079A CN 200910252079 A CN200910252079 A CN 200910252079A CN 101707492 A CN101707492 A CN 101707492A
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- antenna
- electric wave
- wave signal
- wireless receiving
- amplitude modulation
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Abstract
The embodiment of the invention discloses a wireless receiving device, relates to the field of signal receiving devices, and aims at solving the problem of not good effect of received AM radio wave signals, caused by not good match of an amplitude modulation AM antenna and a front-end receiving device. The technical scheme comprises a frequency modulation FM antenna used for receiving FM radio wave signals, the amplitude modulation AM antenna connected with the frequency modulation FM antenna and used for receiving the AM radio wave signals, and an integrated chip connected with the frequency modulation FM antenna and the amplitude modulation AM antenna and used for processing the received FM radio wave signals and AM radio wave signals. The wireless receiving device can be applied to the technical field improving the receiving quality of the AM radio wave signals and the technical field of AM antenna and FM antenna compatibility.
Description
Technical field
The present invention relates to a kind of signal receiving device, relate in particular to a kind of wireless receiving system.
Background technology
Along with the development of mechanics of communication, small-sized electronic product now such as mobile phone, fixed station etc. have all proposed requirement to the reception of multiple broadcasting channel.Broadcasting channel commonly used has frequency modulation, and (Frequency Modulation, (therefore needing a kind of receiving system in above-mentioned electronic product can take in FM and AM signal concurrently for Amplitude Modulation, AM) electric wave in FM) electric wave and amplitude modulation.
In realizing process of the present invention, the inventor finds, in the existing wireless receiving system that can take in FM and AM signal concurrently, because that amplitude modulation AM antenna and front end receiving circuit mate is bad, makes that received AM electric wave signal effect is bad.
Summary of the invention
Embodiments of the invention provide a kind of wireless receiving system, can improve the quality of reception of AM electric wave signal under the situation of taking in FM and AM electric wave signal concurrently.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of wireless receiving system comprises:
The modulating FM antenna is used to receive the FM electric wave signal;
Amplitude modulation AM antenna links to each other with described modulating FM antenna, is used to receive the AM electric wave signal;
Integrated chip links to each other with described amplitude modulation AM antenna with described modulating FM antenna, is used for described FM electric wave signal that receives and AM electric wave signal are handled.
The radio system that the embodiment of the invention provides, because amplitude modulation AM antenna is linked to each other with the modulating FM antenna, link to each other with integrated chip again, make the inductance of amplitude modulation AM antenna and circuit inductance and the quality factor in quality factor and the described integrated chip mate more, solved since parameters such as the inductance of amplitude modulation AM antenna and quality factor to the influence of receiving system, and the received bad problem of AM electric wave signal effect that causes.The wireless receiving system that the embodiment of the invention provides can improve the quality of reception of AM electric wave signal under the situation of taking in FM and AM electric wave signal concurrently.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The structural representation of the wireless receiving system that Fig. 1 provides for the embodiment of the invention one;
The structural representation of the wireless receiving system that Fig. 2 provides for the embodiment of the invention two;
The structural representation of the wireless receiving system that Fig. 3 provides for the embodiment of the invention three.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer, below in conjunction with the accompanying drawing in the embodiment of the invention, technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not paying the every other embodiment that is obtained under the creative work prerequisite.
Embodiment one
As shown in Figure 1, the wireless receiving system that the embodiment of the invention provides comprises:
Modulating FM antenna 1 is used to receive the FM electric wave signal, and described modulating FM antenna is the earphone ground wire, perhaps earphone L channel line, perhaps earphone R channel line.Because FM electric wave signal frequency is higher, wavelength is shorter, adopts about 1/4 common wiring of FM electric wave wavelength, and promptly length is that common wiring about 1 meter just can receive the FM electric wave signal.Therefore, can be with ground wire, L channel line or R channel line in the earphone cord as the antenna that receives the FM electric wave signal.
Amplitude modulation AM antenna 2, with described earphone ground wire, perhaps earphone L channel line, perhaps earphone R channel line links to each other, and is used to receive the AM electric wave signal, and described amplitude modulation AM antenna is a ferrite antenna.Because AM electric wave signal frequency is lower, wavelength is longer, if adopt about 1/4 common wiring of AM electric wave wavelength to receive the AM electric wave signal, required wire length is oversize, therefore need to adopt special ferrite antenna, or other inductance with ferrite antenna is identical with the quality factor parameter or similar, can receive the antenna of AM signal.In the prior art, the inductance of ferrite antenna and quality factor have certain influence to the effect that receiving system receives the AM electric wave signal.Among the present invention, ferrite antenna is linked to each other with earphone cord, the inductance of ferrite antenna and quality factor and front end receiving circuit are mated more.And the data that record by experiment show, the AM electric wave signal better effects if that receives.As shown in the table, the ferrite antenna AM electric wave signal that the back receives that links to each other with electric wire about 1 meter is compared as can be seen with the AM electric wave signal that ferrite antenna independently receives, under most of frequency ranges of AM electric wave, the AM electric wave signal better effects if that the latter receives.
| AM wave frequency (Hz) | The electric wave signal that ferrite antenna independently receives (dB) | The electric wave signal (dB) that ferrite antenna receives when connecing electric wire about 1 meter |
| ??540 | ??64 | ??71 |
| ??792 | ??55 | ??60 |
| ??855 | ??46 | ??54 |
| ??990 | ??50 | ??54 |
| ??1044 | ??39 | ??37 |
| ??1089 | ??36 | ??35 |
| ??1143 | ??49 | ??52 |
| ??1296 | ??46 | ??50 |
| AM wave frequency (Hz) | The electric wave signal that ferrite antenna independently receives (dB) | The electric wave signal (dB) that ferrite antenna receives when connecing electric wire about 1 meter |
| ??1422 | ??50 | ??55 |
| ??1521 | ??47 | ??53 |
In the present embodiment, ferrite antenna can also play the effect of isolating FM and AM electric wave.Particularly, because the impedance of inductance is directly proportional with the frequency of received electric wave, and the FM wave frequency is greater than the AM wave frequency, therefore when FM electric wave and AM electric wave pass through ferrite antenna simultaneously, the FM electric wave can not pass through because the impedance that is subjected to is big, reaches the purpose that FM separates with the AM electric wave with this.
Integrated chip 3 links to each other with described ferrite antenna with described earphone ground wire (perhaps earphone L channel line, perhaps earphone R channel line), is used for described FM electric wave signal that receives and AM electric wave signal are handled.For example, to isolating between described FM electric wave signal and the described AM electric wave signal, described electric wave signal being converted into signal processing operations such as audio signal.Wherein, described signal is isolated also and can be realized by the characteristic of ferrite itself, repeat no more herein.
Among Fig. 14 and 5 is respectively the input of the FM electric wave signal on the integrated chip 3 and the input of AM electric wave signal.
Embodiment two
As shown in Figure 2, the wireless receiving system that the embodiment of the invention provides, basic identical with embodiment one.Difference is, in order to realize ferrite antenna 2 being linked to each other with earphone base 6 line shown in Figure 1 in actual electronic product, realizes ground wire, perhaps L channel line, the perhaps connection of R channel line in ferrite antenna and the earphone cord 1 by earphone base 6.Input 4 with the FM electric wave signal on the integrated chip 3 links to each other with earphone base 6 simultaneously.
Embodiment three
As shown in Figure 3, the wireless receiving system that the embodiment of the invention provides is with the difference of embodiment one, when described modulating FM antenna is the FM built-in aerial, the FM built-in aerial is linked to each other with ferrite antenna, also can improve the reception of AM electric wave signal.
The radio system that the embodiment of the invention provides, because amplitude modulation AM antenna is linked to each other with the modulating FM antenna, link to each other with integrated chip again, make the inductance of amplitude modulation AM antenna and circuit inductance and the quality factor in quality factor and the described integrated chip mate more, solved since parameters such as the inductance of amplitude modulation AM antenna and quality factor to the influence of receiving system, and the received bad problem of AM electric wave signal effect that causes.The wireless receiving system that the embodiment of the invention provides can improve the quality of reception of AM electric wave signal under the situation of taking in FM and AM electric wave signal concurrently.
The present invention can be applicable in the technical field of the technical field of the quality of reception of improving the AM electric wave signal and AM antenna and FM antenna compatibility.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion by described protection range with claim.
Claims (4)
1. a wireless receiving system is characterized in that, comprising:
The modulating FM antenna is used to receive the FM electric wave signal;
Amplitude modulation AM antenna links to each other with described modulating FM antenna, is used to receive the AM electric wave signal;
Integrated chip links to each other with described amplitude modulation AM antenna with described modulating FM antenna, is used for described FM electric wave signal that receives and AM electric wave signal are handled.
2. wireless receiving system according to claim 1 is characterized in that, described modulating FM antenna comprises:
FM built-in aerial, perhaps earphone ground wire, perhaps earphone L channel line, perhaps earphone R channel line.
3. wireless receiving system according to claim 1 is characterized in that, described amplitude modulation AM antenna comprises: ferrite antenna, perhaps identical with the quality factor parameter with the inductance of described ferrite antenna antenna.
4. wireless receiving system according to claim 1 is characterized in that, also comprises:
Earphone base links to each other with the input of the FM electric wave signal of described amplitude modulation AM antenna and described integrated chip, is used to connect earphone cord; The ground wire of described earphone cord, perhaps L channel line, perhaps the R channel line is as described FM antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910252079A CN101707492A (en) | 2009-12-08 | 2009-12-08 | Wireless receiving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910252079A CN101707492A (en) | 2009-12-08 | 2009-12-08 | Wireless receiving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101707492A true CN101707492A (en) | 2010-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910252079A Pending CN101707492A (en) | 2009-12-08 | 2009-12-08 | Wireless receiving device |
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| Country | Link |
|---|---|
| CN (1) | CN101707492A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105744405A (en) * | 2014-12-09 | 2016-07-06 | 苏州欧利嘉电子有限公司 | Earphone for racing driver |
| CN105744404A (en) * | 2014-12-09 | 2016-07-06 | 苏州欧利嘉电子有限公司 | Earphone for racing driver |
-
2009
- 2009-12-08 CN CN200910252079A patent/CN101707492A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105744405A (en) * | 2014-12-09 | 2016-07-06 | 苏州欧利嘉电子有限公司 | Earphone for racing driver |
| CN105744404A (en) * | 2014-12-09 | 2016-07-06 | 苏州欧利嘉电子有限公司 | Earphone for racing driver |
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Application publication date: 20100512 |