CN101459436A - Electronic device - Google Patents
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- CN101459436A CN101459436A CNA2007103009883A CN200710300988A CN101459436A CN 101459436 A CN101459436 A CN 101459436A CN A2007103009883 A CNA2007103009883 A CN A2007103009883A CN 200710300988 A CN200710300988 A CN 200710300988A CN 101459436 A CN101459436 A CN 101459436A
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- power amplifier
- electronic installation
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- filter
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Abstract
The invention relates to an electronic device able to receiving a radio frequency signal, which comprises an antenna, a first power amplifier, a battery, a second filter and a second power amplifier, wherein the antenna receives and outputs radio frequency signals, the first power amplifier is electrically coupled with the antenna, can receive the radio frequency signals, and is used to output an amplified radio frequency signal and a feedback signal after amplifying the radio frequency. The battery is electrically coupled with the first power amplifier for supplying a working voltage to the first power amplifier, and receiving and outputting the feedback signal. The second filter is electrically coupled with the battery, receives the working voltage and the feedback signal supplied by the battery, and is used to output the working voltage after filtering the feedback signal, and the second power amplifier is electrically coupled with the second filter for receiving the working voltage.
Description
Technical field
The relevant a kind of electronic installation of the present invention, and particularly relevant a kind of electronic installation that influences the loudspeaker quality because of radiofrequency signal that reduces.
Background technology
Along with development of science and technology, various electronic installation is constantly pursued " light, thin, short, little ".Under the situation that the volume of electronic installation constantly dwindles, the inner member of electronic installation is crypto set more, even has subelement shared in addition.Below be that electronic installation 900 with Fig. 1 illustrates as follows.
Please refer to Fig. 1, it illustrates a kind of functional block diagram of traditional electronic installation.Electronic installation 900 comprises an antenna 910, one first power amplifier 920, a filter 930, a fundamental frequency transducer 940, an audio chip 950, one second power amplifier 960, a loud speaker 970 and a battery 980.Wherein, first power amplifier 920 is electrically coupled to antenna 910 and filter 930, and fundamental frequency transducer 940 is electrically coupled to filter 930, the second power amplifiers 960 and is electrically coupled to audio chip 950 and loud speaker 970.In addition, first power amplifier 920 and second power amplifier 960 all are electrically coupled to battery 980.
Antenna 910 receives a radiofrequency signal (Radio Frequency Signal, be called for short RF Signal) after, export filter 930 to after then radiofrequency signal being amplified by first power amplifier 920, and through after filter 930 does filtering, radiofrequency signal is then sent to reach fundamental frequency transducer 940 and do the fundamental frequency conversion.
At this moment, because battery 980 is also supplied operating voltage to the second power amplifier 960, the feedback signal that feeds back to battery 980 will be passed to second power amplifier 960 by battery 980, be passed to loud speaker 970 again.That is to say that the operating voltage that battery 980 is supplied to contains the noise contribution of part.Generally speaking, frequency is about 217Hz and frequency multiplication thereof to the time slot frame of this feedback signal (time slot frame), and the noise of 217Hz and frequency multiplication thereof is the frequency range that people's ear can be heard.Therefore, the user of electronic installation 900 hears that through regular meeting voice signal that loud speaker 970 is exported has the noise of similar high-frequency signal.
In the case, the designer often must sacrifice the voice signal quality and meet the requirement of " light, thin, short, little " with the pursuit electronic installation, or sacrifices the volume of electronic installation, and adopts two batteries to avoid generating noise.
Summary of the invention
The relevant a kind of electronic installation of the present invention, it utilizes a filter can remove the feedback signal that is passed to second filter via battery, makes the user no longer hear noise.
According to an aspect of the present invention, propose a kind of electronic installation, receive a radiofrequency signal.Electronic installation comprises an antenna, one first power amplifier, a battery, one second filter and one second power amplifier.Antenna receives and the output radiofrequency signal.First power amplifier is electrically coupled to antenna, and received RF signal, is used to amplify a radiofrequency signal and a feedback signal after output is amplified after the radiofrequency signal.Battery is electrically coupled to first power amplifier, in order to supplying with operating voltage to the first power amplifier, and reception and output feedback signal.Second filter is electrically coupled to battery, and receives operating voltage and feedback signal that battery is supplied with, be used to the filtering feedback signal after, output services voltage.Second power amplifier is electrically coupled to second filter, in order to receive operating voltage.
Description of drawings
For foregoing of the present invention can be become apparent, below in conjunction with accompanying drawing preferred embodiment of the present invention is elaborated, wherein:
Fig. 1 illustrates a kind of functional block diagram of traditional electronic installation; And
Fig. 2 illustrates the functional block diagram according to the electronic installation of preferred embodiment of the present invention.
Embodiment
Please refer to Fig. 2, it illustrates the functional block diagram according to the electronic installation 100 of preferred embodiment of the present invention.Electronic installation 100 is in order to receive a radiofrequency signal, for example is a mobile phone, a global positioning system (GlobalPositioning System is called for short GPS) receiving system, a radio system or a broadcast receiver.Electronic installation 100 comprises an antenna 110, one first power amplifier 120, one first filter 130, a fundamental frequency transducer 140, a battery 180, one second filter 190, an adjuster 191, one second power amplifier 160, an audio chip 150 and a loud speaker 170.From one side, the antenna 110 of electronic installation 100 is in order to receive a radiofrequency signal.Radiofrequency signal can be passed through antenna 110, first power amplifier 120, first filter 130 and fundamental frequency transducer 140 first paths and transmit, and handles action to carry out various communications.
From another point of view, the audio chip 150 of electronic installation 100 is in order to provide an audio signal.Audio signal can transmit by second path of audio chip 150, second power amplifier 160 and loud speaker 170, to carry out the broadcast of voice or music.
With regard to first path, first power amplifier 120 is electrically coupled to antenna 110, and received RF signal.First power amplifier 120 is in order to amplify radiofrequency signal.
With regard to second path, second power amplifier 160 is coupled to audio chip 150.Second power amplifier 160 is in order to the amplification audio signal, and the audio signal output after will amplifying is to loud speaker 170.
After the audio signal that loud speaker 170 receives after amplifying, convert audio signal to voice signal again, and play to the external world, listen to for the user.
For fear of the decay of the radiofrequency signal in first path, generally be that first power amplifier 120 is disposed at around the antenna 110.Equally, the decay for the audio signal of avoiding second path can be disposed at second power amplifier 160 around the loud speaker 170 equally.And, keep good usefulness for making first power amplifier 120 and second power amplifier 160, first power amplifier 120 and second power amplifier 160 design the time will inevitably preferentially place battery 180 around.
As shown in Figure 2, battery 180 is electrically coupled to first power amplifier 120 and second power amplifier 160, in order to first power amplifier 120 in supply operating voltage to the first path and second power amplifier 160 in second path.When first power amplifier 120 receives the operating voltage of battery 180, to have the radio frequency signal feedback of part to battery 180, and be passed to other elements that electrically connect with battery 180 by battery 180, for example be second power amplifier 160 in second path.
In order to eliminate the feedback signal that second power amplifier 160 transmits, second filter 190 is electrically coupled between the battery 180 and second power amplifier 160, and receives operating voltage and feedback signal that battery 180 is supplied with.After second filter, the 190 filtering feedback signals, and export the operating voltage after the filtering feedback signal to second power amplifier 160.Second power amplifier 160 is electrically coupled to second filter 190.The operating voltage that this moment, second power amplifier 160 was received has not then had noise.
Filter can be divided into low pass filter (Lowpass filter), high pass filter (Highpass filter), band pass filter (Bandpass filter) and band according to filter (Bandstop filter) etc., and its difference is the conversion specification difference of processing signals.
Wherein, low pass filter allows that low frequency signal passes through, and weakens the passing through of signal that (or reduce) frequency is higher than cut-off frequency.For different filters, the signal of each frequency weaken the degree difference.When using in voice applications, low pass filter also is called as the highdensity plywood filter or high pitch is eliminated filter.
Low pass filter has many different forms, comprises digital algorithm, sound barrier (acoustic barriers), image blurring processing of the hiss filter that uses in the audio frequency apparatus, smoothed data etc.
Generally speaking, feedback signal is 5%～10% radiofrequency signal.When the frequency range of the time slot frame of feedback signal during, be the frequency range that people's ear can be heard in 210Hz～220Hz and frequency multiplication thereof.Low pass filter is the signal of filtering 210Hz～220Hz and frequency multiplication thereof effectively, so second filter 190 of present embodiment is that (Low-Pass Filter LPF) explains for example with a low pass filter.
In addition, electronic installation 100 also comprises adjuster 191.Adjuster 191 is electrically coupled between second filter 190 and second power amplifier 160, and adjuster 191 can be done the level adjustment to operating voltage, and suppresses the signal of non-flip-flop.
Preferably, in order to cooperate the frequency range of feedback signal, adjuster 191 can adopt a low noise adjuster (Low Noise Regulator).For example be a low dropout regulator (Low Dropout Regulator, LDORegulator).
Thus, provide simultaneously under first power amplifier 120 and the situation of second power amplifier 160 in second path of operating voltage to above-mentioned first via footpath at battery 180, though the feedback signal of first power amplifier 120 may be passed to second power amplifier 160 by battery 180, but by above-mentioned second filter, 190 filtering noises, and behind the signal by the non-flip-flop of adjuster 191 inhibition, the operating voltage that second power amplifier 160 is received has not had noise.Therefore can not have influence on the audio signal in second path.The audio signal that makes the user hear no longer contains noise.
The electronic installation that the above embodiment of the present invention disclosed is to utilize a filter, and the adjuster of perhaps arranging in pairs or groups again can be removed the feedback signal that is passed to loud speaker by battery, and makes electronic installation have multiple advantages, below only enumerates the part advantage:
The first, by the filtering and the adjusting of filter and adjuster, filtering that loud speaker is received and adjusted operating voltage have not contained noise contribution, and the audio signal that makes the user hear that acoustic assembly is exported no longer contains noise.
The second, after audio signal no longer produced noise, first power amplifier and second power amplifier can shared same batteries, and what not only make electronic installation more meets light, thin, short, little trend, more need not sacrifice the quality of audio signal.
In sum, though the present invention with the preferred embodiment announcement as above, yet it is not in order to limit the present invention.The persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when doing various changes that are equal to and retouching.Therefore, protection scope of the present invention is when looking accompanying being as the criterion that the application's claim scope defined.
Claims (10)
1. an electronic installation receives a radiofrequency signal, and this electronic installation comprises:
One antenna receives and exports this radiofrequency signal;
One first power amplifier is electrically coupled to this antenna, and receives this radiofrequency signal, is used to amplify this radiofrequency signal and a feedback signal after output is amplified after this radiofrequency signal;
One battery is electrically coupled to this first power amplifier, in order to supplying with an operating voltage to this first power amplifier, and receives and export this feedback signal;
One second filter is electrically coupled to this battery, and receives this operating voltage and this feedback signal that this battery is supplied with, be used to this feedback signal of filtering after, export this operating voltage; And
One second power amplifier is electrically coupled to this second filter, in order to receive this operating voltage.
2. electronic installation according to claim 1 is characterized in that also comprising an adjuster, and it is electrically coupled between this second filter and this second power amplifier, and this adjuster is that this operating voltage is done the level adjustment.
3. electronic installation according to claim 2 is characterized in that this adjuster is a low noise adjuster.
4. electronic installation according to claim 2 is characterized in that this adjuster is a low dropout regulator.
5. electronic installation according to claim 1 is characterized in that this electronic installation is a mobile phone, a GPS receiver, a radio system or a broadcast receiver.
6. electronic installation according to claim 1 is characterized in that the frequency range of the time slot frame of this feedback signal is 210Hz～220Hz.
7. electronic installation according to claim 6, the frequency range that it is characterized in that the time slot frame of this feedback signal is the frequency multiplication of 210Hz～220Hz.
8. electronic installation according to claim 1 is characterized in that this feedback signal is this radiofrequency signal of 5%～10%.
9. electronic installation according to claim 1 is characterized in that also comprising:
One audio chip is electrically coupled to this second power amplifier, and this audio chip produces and exports an audio signal to this second power amplifier; And
One loud speaker is electrically coupled to this second power amplifier, and receives and output this audio signal after this second power amplifier amplifies.
10. electronic installation according to claim 1 is characterized in that also comprising:
One first filter is electrically coupled to this first power amplifier, and receives this radiofrequency signal, is used to this radiofrequency signal is done to export after the filtering; And
One fundamental frequency transducer is electrically coupled to this first filter, and this radiofrequency signal after accepting filter, in order to convert this radiofrequency signal to fundamental frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103009883A CN101459436A (en) | 2007-12-12 | 2007-12-12 | Electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007103009883A CN101459436A (en) | 2007-12-12 | 2007-12-12 | Electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101459436A true CN101459436A (en) | 2009-06-17 |
Family
ID=40770092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007103009883A Pending CN101459436A (en) | 2007-12-12 | 2007-12-12 | Electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101459436A (en) |
-
2007
- 2007-12-12 CN CNA2007103009883A patent/CN101459436A/en active Pending
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20090617 |