CN102124657A - Noise cancellation device, and noise cancellation module and electronic device using same - Google Patents
Noise cancellation device, and noise cancellation module and electronic device using same Download PDFInfo
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- CN102124657A CN102124657A CN2009801319596A CN200980131959A CN102124657A CN 102124657 A CN102124657 A CN 102124657A CN 2009801319596 A CN2009801319596 A CN 2009801319596A CN 200980131959 A CN200980131959 A CN 200980131959A CN 102124657 A CN102124657 A CN 102124657A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
- H04B1/12—Neutralising, balancing, or compensation arrangements
- H04B1/123—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means
- H04B1/126—Neutralising, balancing, or compensation arrangements using adaptive balancing or compensation means having multiple inputs, e.g. auxiliary antenna for receiving interfering signal
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Abstract
Disclosed is a noise cancellation device comprising a first antenna arranged within a shield and a noise cancellation unit into which noise signals received by the first antenna are input. Based on the noise signals input via the first antenna from a noise source, the noise cancellation unit attenuates the noise signals from the noise source, which are included in high-frequency signals received by a second antenna.
Description
Technical field
The present invention relates to the noise elimination apparatus that in various electronic equipments, uses.
Background technology
Figure 16 is the block diagram of noise elimination apparatus in the past.Be illustrated in the block diagram of the noise elimination apparatus that uses in the television reception portable terminal devices such as mobile phone.In Figure 16, in main body 1, be provided with image/sound efferent 8, and this image/sound efferent 8 signal processing part 9 and control part 10 have been connected at picture 2.
Between main body 1 and picture receiver 5, be connected with holding wire, control line.In addition, between the earth terminal 5a of earth terminal (earth) 1a of main body 1 and picture receiver 5, be connected with earth connection 5b.Be connected with adapter 11, tuner 12, demodulator 13 on the antenna 7 of picture receiver 5 in turn.The output signal of demodulation section 13 is processed in signal processing part 9, and provides it to image/sound efferent 8, thereby but audiovisual based on the television broadcasting of picture 2 and loud speaker 14.
Above-mentioned adapter 11 by the adaptation 15 of antenna 7 sides and thereafter the amplifier 16 of one-level constitute, thus, even short antenna 7 also can improve receiving sensitivity and can realize impedance matching.Between adapter 11 and tuner 12, connect noise removing portion 17,, between adapter 11 and tuner 12, provide noise-cancelling signal by this noise removing portion 17.
That is, noise removing portion 17 provides and the identical noise signal of noise that enters antenna 7 from this main body 1 to phase controller 19 from the earth terminal 18 of the main body 1 of portable equipment, and makes the anti-phase noise-cancelling signal that generates of noise signal therein.In addition, the noise-cancelling signal that offers noise removing portion 17 also can use the ground connection in the picture receiver 5 to bring in the earth terminal 18 that replaces main body 1.
But, in noise elimination apparatus in the past, carry out picking up of noise by the earth terminal 18 of main body 1.Because the earth terminal 18 of main body 1 also can receive the TV signal that is received by antenna 7, so the TV signal that receives in the earth terminal 18 of main body 1 can be input to noise removing portion, its result eliminates the action of the TV signal that is received by antenna 7.Therefore, in noise elimination apparatus in the past, the signal that has the expectation that receives is by the problem of deterioration.
In addition, as the formerly technical literature information relevant with the application's invention, for example known have a patent documentation 1.
[patent documentation 1] TOHKEMY 2008-22294 communique
Summary of the invention
Noise elimination apparatus of the present invention comprises: first antenna, and it is configured in the shield (shield); And noise removing portion, the noise signal that its input receives in first antenna from noise source, noise removing portion makes the noise signal decay from described noise source that is included in the high-frequency signal that is received by second antenna based on the noise signal from described noise source from the input of first antenna.
In the present invention, because first antenna configurations is in shield, so can suppress from the reception of the desired signal (above-mentioned, being equivalent to TV signal) of outside arrival.In addition, cover, be difficult to be imported into second antenna, so can realize having the noise elimination apparatus of high receptivity near the noise signal conductively-closed body of the noise source the 1st antenna.
Description of drawings
Fig. 1 is noise elimination apparatus in the embodiments of the present invention 1 and the block diagram that has used the electronic equipment of this device.
Fig. 2 is the stereogram of the noise elimination apparatus in the execution mode 1.
Fig. 3 is the vertical view of first antenna in the execution mode 1.
Fig. 4 is other the vertical view of first antenna in the execution mode 1.
Fig. 5 is the upward view of first antenna in the execution mode 1.
Fig. 6 is first antenna in the execution mode 1 and the side cutaway view of shield.
Fig. 7 is first antenna in the execution mode 1 and other side cutaway views of shield plate.
Fig. 8 is the details drawing of the shield plate end in the execution mode 1.
Fig. 9 is the side cutaway view of structure that improves the sensitivity of first antenna in the execution mode 1.
Figure 10 is the block diagram of the noise elimination apparatus in the execution mode 1.
Figure 11 A is the vertical view of the noise elimination apparatus in the embodiments of the present invention 2.
Figure 11 B is the upward view of noise elimination apparatus.
Figure 12 is the block diagram of the noise elimination apparatus in the execution mode 2.
Figure 13 is the performance plot of the power supply/control signal of control part.
Figure 14 A is the top perspective view of the noise elimination apparatus in the embodiments of the present invention 3.
Figure 14 B is the below stereogram of noise elimination apparatus.
Figure 14 C is the face side view that the main substrate of noise elimination apparatus is installed.
Figure 15 A is the vertical view of the noise cancellation module in the embodiments of the present invention 4.
Figure 15 B is the upward view of noise cancellation module.
Figure 16 is the block diagram of noise elimination apparatus in the past.
Among the figure: the 30-noise elimination apparatus; 31-shield (shield); 32-first antenna; 33-noise removing portion; The 34-main body; The 35-picture receiver; 37-second antenna; The 38-adapter; The 39-tuner; The 40-demodulation section; The 41-signal processing part; 42-image/sound efferent; The 43-display part; The 44-loud speaker; The 45-adaptation; The 46-amplifier; The 47-control part; The 48-phase controller; The 49-control part; The 50-gain controller; The 51-band pass filter.
Embodiment
(execution mode 1)
Below, with reference to description of drawings embodiments of the present invention 1.
The example that is described as follows: in the electronic equipment that is received as purpose as high-frequency signal and for example, carried noise elimination apparatus of the present invention with television broadcasting signal.
Fig. 1 is noise elimination apparatus in the embodiments of the present invention 1 and the block diagram that has used the electronic equipment of this device.Noise elimination apparatus 30 in the embodiments of the present invention 1 comprises: first antenna 32 that is configured in the inboard of shield 31; And the noise removing portion 33 that imports the noise signal that in first antenna 32, receives.
In picture receiver 35, carried adapter 38, noise elimination apparatus 30, tuner 39 and the demodulation section 40 of the TV signal that second antenna 37, input receive by second antenna.
With the output signal of the output signal of adapter 38 and noise elimination apparatus 30 synthetic after, be input to tuner 39.The TV signal of 39 pairs of inputs of tuner is amplified, export to demodulation section 40 after frequency translation, noise remove etc.In demodulation section 40, modulated TV signal is carried out demodulation, and the signal after the demodulation is outputed to signal processing part 41.
In main body 34, be provided with image/sound efferent 42 to display part 43 and loud speaker 44 output images and sound, also be provided with the control part 47 of this image/sound efferent 42 of control and signal processing part 41.
Between main body 34 and picture receiver 35, be connected with holding wire that is electrically connected signal processing part 41 and demodulation section 40 and the control line that is electrically connected control part 47, tuner 39, demodulation section 40, control part 49.In addition, between earth terminal 35a, the 35b of earth terminal 34a, the 34b of main body 34 and picture receiver 35, be connected with earth connection 36a, 36b.
By in signal processing part 41, handling the output signal of demodulation section 40, and offer image/sound efferent 42, thereby but audiovisual based on the television broadcasting of display part 43 and loud speaker 44.
Connect noise removing portion 33 between adapter 38 that constitutes like this and tuner 39, this noise removing portion 33 provides noise-cancelling signal between adapter 38 and tuner 39.Noise elimination apparatus 30 by first antenna 32 pick up with from being positioned at the identical noise of noise that near first antenna 32 noise source invades second antenna 37, and the noise that will pick up offers phase controller 48.
The output signal of phase controller 48 is input to gain controller 50.Gain controller 50 is based on the control signal from control part 49 inputs, change the amplitude of noise, when synthesizing with the TV signal of exporting from adapter 38, adjustment is from the amplitude of the noise of first antenna 32 input, make be included in this TV signal in the absolute value of amplitude of noise identical.
The output signal of gain controller 50 is input to filter 51.Filter 51 is that the frequency bandwidth of TV signal that second antenna 37 is received is made as the band pass filter (BPF) by frequency band, has the effect of the noise attentuation beyond the frequency band of the TV signal of making.
The received signal quality information of the TV signal of demodulation section 40 derivation inputs (for example, carrier wave/noise), BER (Bit Error Rate: the index of the quality of expression received signal such as) error rate) C/N (Carrier/Noise:, and this received signal quality information offered control part 47.Control part 47 sends to control part 49 based on the received signal quality information with control signal, and control part 49 is based on this control signal, control phase controller 48 and gain controller 50.
For example, with the output signal of the output signal of adapter 38 and noise elimination apparatus 30 synthetic after, under the situation that noise has increased, because the received signal quality information deterioration that in demodulation section 40, derives, so control part 47 sends the phase place that is used for being adjusted at the noise that first antenna 32 picks up, the control signal of amplitude to control part 49.
Afterwards, adjust phase place, the amplitude of noise, for example after the output signal of the output signal of synthetic antenna adaptation 38 and noise elimination apparatus 30, be made as noise and be suppressed.At this moment, the received signal quality information that derives in demodulation section 40 is good, and control part 47 transmits control signal to control part 49, makes the setting of phase controller 48 and gain controller 50 be fixed.
Here, for example, go back under the situation of received television signal, in the output signal of noise elimination apparatus 30, also comprise TV signal, may suppress the TV signal that second antenna 37 receives at first antenna 32.Its result, (Signal/Noise: signal/noise) than worsening, the receiving feature of electronic equipment can worsen to be input to the S/N of the TV signal of demodulation section.
In the noise elimination apparatus 30 of present embodiment 1, because first antenna 32 is configured in the inside of shield 31, so become the antenna that is difficult to received television signal.
Specifically, being covered under the situation on every side of first antenna 32 by conductive shield body 31, compare with the radiation resistance of second antenna 37 that is not configured in shield inside, the radiation resistance of first antenna 32 is obviously little.Thus, the S/N ratio of the signal that receives with second antenna 37 is compared, and the S/N ratio of the signal that first antenna 32 can be received is provided with lessly, can improve the S/N ratio of the TV signal that is input to demodulation section 40.
In addition, the situation low according to the radiation resistance of first antenna 32 can be imagined the difficulty that becomes of picking up of noise whether, but since first antenna 32 be configured in noise source near, so can receive noise by carrying out electromagnetic coupled with noise source.
Specifically, first antenna 32 for the sensitivity of electromagnetic coupled along with increasing near the cube of first antenna 32 with distance, and for the sensitivity of the reception of the TV signal that arrives from afar along with increasing near the first power of first antenna 32 with distance.Therefore, first antenna 32 has big sensitivity with respect to noise source, on the other hand, because be configured in shield 31 inside, so also be subjected to the influence that radiation resistance reduces, to TV signal only have little sensitivity (list of references: figure say ア Application テ Na (P153[formula 3.5], P180[formula 3.41], the author: the back rattan still for a long time, publisher: (Choi) Electricity feelings Reported Communications Society).
As mentioned above, the invention is characterized in the low antenna of radiation resistance that has adopted common those skilled in the art can not adopt as first antenna 32.The present invention reduces the sensitivity with respect to the TV signal that arrives from afar by adopting the low antenna of radiation resistance, on the contrary, by near configuration first antenna noise source, thereby noise is had high sensitivity.
In addition, owing to can suppress to be input to the noisiness of second antenna 37 from noise source by shield 31, so can also improve the S/N ratio of the output signal of second antenna 37.
Fig. 2 is the stereogram of the noise elimination apparatus in the execution mode 1.Fig. 2 represents an embodiment of the concrete structure of first antenna 32 and shield 31.
In Fig. 2, noise removing portion 33 has been carried and as the semiconducter IC of noise source 53 in the top of the main substrate 52 in being built in electronic equipment (in Fig. 1, being built in the substrate in the picture receiver 35).
Near noise source 53, be provided for first antenna 32 of pick-up noise, shield 31 is set to roughly surround the noise source 53 and first antenna 32.At least a portion of shield 31 is formed by electroconductive component, both can by electroconductive component cover the noise source 53 and first antenna 32 around whole, also can open the hole (for example, diameter is below about 1/10 of wavelength of received signal) of a diameter littler than the wavelength of received signal.This is because if the diameter in hole is littler than wavelength, then the signal of coming from the outside is difficult to leak and enters in the shield.
In addition, shield 31 also can be realized by the conductive pattern that carries the shield plate above main substrate 52 and be formed in the main substrate 52.Thus, can realize shield 31 easily.And then shield 31 can be connected to the ground (ground) that main substrate 52 forms in the direct current mode, also can not connect.This be because, be connected irrespectively with having or not between the ground of shield 31 and main substrate 52, as long as first antenna 32 is configured in the inboard of shield 31, just can be set as first antenna 32 and be difficult to receive structure from the TV signal of outside arrival.
In Fig. 2, first antenna 32 is the loop aerials as the balanced type antenna.If adopt the balanced type antenna as first antenna 32, then can be suppressed on the transmission line 54 that is electrically connected first antenna 32 and noise removing portion 33 and produce common mode (common mode), can be transmitted in the noise that picks up in first antenna 32 by differential mode (differential mode) basically.Thus, can suppress transmission line 54 and carry out antenna action, can prevent that transmission line 54 from moving as antenna, and receive the TV signal that arrives from the outside by transmission line 54.Therefore, the noise elimination apparatus of the electronic equipment that can realize having high receptivity can be provided.
In addition, also can select the shape of first antenna 32, feasible supply terminals (not shown) with respect to first antenna 32 becomes symmetrical structure as far as possible, so that first antenna 32 moves as the balanced type antenna easily, also can on loading position, work hard with respect to first antenna 32 of noise source 53.This is because also move as the part of the antenna of first antenna 32 with the noise source 53 of first antenna, 32 electromagnetic coupled, so constitute parts around first antenna 32 are included, and becoming symmetric shape as far as possible, easier first antenna 32 that makes moves as the balanced type antenna.
In Fig. 2, transmission line 54 is the feed lines as the balanced type transmission line.Because being used on transmission line 54, being easy to generate common mode under the situation of transmission line 54, so transmission line 54 also moves as antenna easily as the coaxial line of unbalanced type transmission line.
In addition,, the situation that transmission line 54 moves as antenna can be suppressed, and the structure that is difficult to receive the TV signal that arrives from the outside can be constituted adopting under the situation of balanced type transmission line as transmission line 54.
And then, as noise source 53, both can be used as near second antenna 37 tuner 39 or the demodulation section 40 of configuration, also can be used as the display part 43 of the bigger noise signal of radiation or signal processing part 41 etc.
Fig. 3 is the vertical view of first antenna in the execution mode 1.Fig. 4 is other the vertical view of first antenna in the execution mode 1.
Fig. 3, Fig. 4 are concrete structures of first antenna 32.In Fig. 3, first antenna 32 is made of the loop aerial 56 that is formed in the flexible base, board 55.
Loop aerial 56 is magnetic current type antenna (can arrange the antenna of the action of small magnetic dipole), compares with the current antenna (can arrange the antenna of the action of small electric dipole) that dipole antenna is such, and magnetic field is had the sensitivity higher than electric field.Therefore, become under the situation of noise source, because magnetic field is than the ratio height of electric field, so, then can increase the amount of picking up of noise if adopt the such magnetic current type antenna of loop aerial shown in Figure 3 56 at the position of flowing through big electric current.
In Fig. 4,, thereby realized first antenna 32 by formation folded doublet 57 on flexible base, board 55.Folded doublet 57 is current antennas, compares with the magnetic current type antenna that the loop aerial 56 of Fig. 3 is such, and electric field is had the sensitivity higher than magnetic field.Therefore, become under the situation of noise source, because the ratio of electric field is than magnetic field height, so if adopt the such current antenna of dipole antenna, then can increase the amount of picking up of noise at the position that produces high potential difference.
Fig. 3, Fig. 4 are the balanced type antennas, but are not limited to this, also can adopt one pole (monopole) antenna as the unbalanced type antenna.By adopting the unbalanced type antenna, can make 32 miniaturizations of first antenna.
Fig. 3, first antenna 32 shown in Figure 4 be configured in noise source 53 near, but because constituted first antenna 32 by flexible base, board 55, thus can carry easily have concavo-convex noise source near.At this moment, also can be on the one side at least of the flexible base, board of Fig. 3, first antenna 32 shown in Figure 4 additional adhesive part, by adhesive part paste noise source 53 near.
In addition, owing to after design of electronic devices finishes, determine the loading position of first antenna 32 mostly under the situation, if, determine near the position that noise source is easily and the advantageous effects of pasting so the invention of present embodiment 1 then has after design of electronic devices finishes.
In addition, also can the flexible base, board 55 of Fig. 3, be not to form shield pattern 58 on the face of formation face of loop aerial 56.Fig. 5 is the upward view of first antenna in the execution mode 1.The back side that Fig. 5 is illustrated in first antenna 32 shown in Figure 3 has formed the figure of shield pattern 58.Under this state, dispose near noise source 53 by making the face that does not form shield pattern 58, thereby can improve the inhibition effect of reception from the TV signal of outside arrival.
For example, in Fig. 2, by the face of loop aerial 56 of first antenna 32 of having pasted as shown in Figure 5 formation from the sealing of the top of noise source 53, thus also can be without the shield plate on the main substrate 52 of shield 31.Thus, lightweight, the slimming of electronic equipment can be realized, and the manufacturing efficient of noise elimination apparatus can be improved.
In addition, the shield pattern 58 of Fig. 5 and the shield pattern (not shown) that is formed in the main substrate 52 both can also can insulate with the conducting of direct current mode.This be because, even shield pattern 58 and be formed on shield pattern (not shown) on the main substrate 52 via (for example than the little slit of the wavelength of TV signal, about 1/10 gap width of wavelength) be insulated, TV signal also is difficult to come in from this slot leakage.
Fig. 6 is first antenna in the execution mode 1 and the side cutaway view of shield.Fig. 6 is the side cutaway view of a concrete embodiment of expression first antenna 32 and shield 31.Above main substrate 52, carry noise source 53 in advance,, form shield by shield plate 59 and the shield pattern 60 that is formed on the back side of main substrate 52 according to the mode of surrounding this noise source 53.In addition, shield plate 59 and shield pattern 60 both can be with the conductings of direct current mode, also can not conducting.With the inboard of noise source 53 opposed shield plates 59, dispose first antenna 32, the noise in pick-up noise source 53.
Fig. 7 is other a side cutaway view of first antenna in the execution mode 1 and shield plate.Fig. 7 is the cutaway view of seeing from the side different with the side cutaway view of Fig. 6, for the ease of understanding, only illustrates the shield plate 59 and first antenna 32.In Fig. 7, first antenna 32 is configured in the inboard of shield plate 59, and the transmission line of first antenna 32 partly becomes the structure of turning back in the end of shield plate 59.
Fig. 8 is the details drawing of the shield plate end in the execution mode 1.Fig. 8 has enlarged the end A of the shield plate 59 among Fig. 7.Fig. 8 is the figure when end A is seen in the side identical with Fig. 6.In Fig. 8, the flexible base, board 55 that has formed the transmission line 61 of first antenna is configured to from the back side of first anchor portion 62 of shield plate 59 to the face of surface coverage first anchor portion 62.
In addition, the width that also can be designed to flexible base, board 55 is wideer than the width of first anchor portion 62, and is thought of as first anchor portion 62 and does not expose from flexible base, board 55.Thus, pad can not be connected in the direct current mode on shield plate 59 and the main substrate.
In addition, if do not worry that pad is connected in the direct current mode on shield plate 59 and the main substrate, then also can as shown in Figure 7 flexible base, board 55 be configured to only cover the back side, and need not to be configured to the back side from first anchor portion 62 of shield plate 59 to whole of surface coverage.Thus, can improve the manufacturing efficient of noise elimination apparatus.
And then, also can adhesive portion be set in the part of the flexible base, board of first antenna 32 of pie graph 7, utilize this adhesive portion, paste the back side of shield plate 59.Thus, can improve the manufacturing efficient of noise elimination apparatus.
In addition, for the noise pickup sensitivity of first antenna 32 that improves Fig. 7, also can constitute and make first antenna 32 further near noise source 53 and the structure of configuration.Use Fig. 9 to represent the embodiment that this is specialized.Fig. 9 is the side cutaway view of structure that improves the sensitivity of first antenna in the execution mode 1.
In Fig. 9, be that with the difference of Fig. 7 newly be provided with isolation (spacer) portion 64 in the inboard of shield plate 59, side surface has disposed first antenna 32 within it.Thus, the interval between the noise source 53 and first antenna 32 is further narrowed down, can further improve the sensitivity that noise receives.
Figure 10 is the block diagram of the noise elimination apparatus in the execution mode 1.Figure 10 represents that first antenna 32 is used to receive the structure of bigger noise.In Figure 10, on first antenna 32, amplifier 65 has been installed as the balanced type antenna.Because first antenna 32 is the balanced type antenna, so amplifier 65 also has symmetrical structure.Power to this amplifier 65 via balanced type transmission line 54.
Specifically, connect at the two ends of first antenna, 32 sides of transmission line 54, noise removing portion 33 sides and TV signal to be passed through but block the capacitor 66 of DC power supply 67a, also connect make DC power supply 67a by but block the inductor 67 of TV signal.Via inductor 67, provide DC power supply 67a to amplifier 65.Thus, do not need additional new supply lines.
In addition, in Figure 10, owing to used the transmission line 54 of balanced type, so by roughly component value, the link position of symmetry have constituted capacitor 66 and inductor 67.
(execution mode 2)
Below, the noise elimination apparatus of use description of drawings embodiments of the present invention 2.Figure 11 A is the vertical view of the noise elimination apparatus in the embodiments of the present invention 2, and Figure 11 B is the upward view of noise elimination apparatus.
In Figure 11 A, the top with noise removing portion 33 is installed in flexible base, board 55 in advance is formed with first antenna 32, to surround noise removing portion 33 on flexible base, board.
In Figure 11 B, all be pre-formed shield pattern 58 in the rear side of flexible base, board 55, conducting shield pattern 58 such as the shield pattern of the peripheral part by Figure 11 A and through hole.
The part of the shield pattern 58 of Figure 11 A is electrically connected with the shield pattern 60 of the main substrate of Fig. 6, forms the shield 31 of Fig. 1.Shown in Figure 11 A,, can obtain near noise source, can form easily the favourable effect of shield 31 by have certain thickness noise removing portion 33 in the configuration of the substantial middle portion of flexible base, board 55.
In addition, if shown in Figure 11 A, constitute the inboard that first antenna 32 and noise removing portion 33 are configured in shield 31 like that, then need not as shown in Figure 2 transmission line 54 to be configured in the outside of shield 31, so can prevent by transmission line 54 received television signals.
In addition, in Figure 11 A, represented noise removing portion 33, first antenna 32, the structure of shield pattern 58 formation/lift-launchs on flexible base, board 55.But be not limited to this, for example, also can further tuner 39, demodulation section 40 be carried on the flexible base, board 55 of Figure 11 A.Thus, the transmission line that is electrically connected tuner 39, demodulation section 40 and noise removing portion 33 can be shortened, loss can be reduced.
In addition, in noise removing portion 33, be electrically connected and the tuner 39 of Fig. 1, the holding wire 68 that adapter 38 links to each other, but this holding wire 68 is configured between the power supply of first antenna 32.Thus, can prevent to hinder the situation of the balance play of first antenna 32.
In addition, in Figure 11 A, be formed with shield pattern 58, but also can be the structure of this shield pattern 58 not at the peripheral part of flexible base, board 55.And, also can on the face of Figure 11 of flexible base, board 55 A, add adhesive portion (not shown), be installed on the main substrate 52 of Fig. 6 via this adhesive portion.
Even have the slit between the shield pattern 58 of the shield pattern 60 of the main substrate 52 of Fig. 6 and Figure 11 B, if gap width is enough little with respect to the wavelength of TV signal, then TV signal also is difficult to enter via this slot leakage the inside of shield 31.
Figure 12 is the block diagram of the noise elimination apparatus in the execution mode 2.In Figure 12, an embodiment of the method for attachment of the noise removing portion 33 of presentation graphs 11A, tuner 39, control part 47.In Figure 12,, give identical symbol and omit explanation for the structure identical with Fig. 1.
In Figure 12, capacitor 68a has following effect, that is: TV signal etc. is passed through by the signal that second antenna 37 of Fig. 1 receives, but roughly blocked control signal or the power supply that sends from control part 47.Inductor 69 has following effect, that is: the control signal or the power supply that send from control part 47 are passed through, but roughly cuts off the signal that TV signal etc. is received by second antenna 37 of Fig. 1.
The action of the block diagram of Figure 12 is described.The TV signal that receives in second antenna 37 of Fig. 1 is provided for tuner 39 by capacitor 68a.Then, in tuner 39, carry out outputing to demodulation section 40 after the frequency translation.
In this demodulation section 40, the demodulation of the TV signal of importing, carrier wave/noise), BER (Bit Error Rate: the error rate) wait the index of the quality of representing received signal) and received signal quality information (for example, the C/N (Carrier/Noise: that derives the TV signal of input.
And, provide this received signal quality information to control part 47.Control part 47 generates control signal based on the received signal quality information, and sends this control signal via inductor 69 to control part 49.Here, for supplying with, also be to overlap on this control signal, and offer noise removing portion 33 via inductor 69 to the power supply of noise removing portion 33.
Figure 13 is the performance plot of the power supply/control signal of control part.Figure 13 represents from the position embodiment of control part 47 to the superimposed signal waveform of the supply voltage of noise removing portion 33 output and control signal.The transverse axis express time, the longitudinal axis is represented magnitude of voltage.In Figure 13, characteristic 130 expressions output to the waveform of the signal of noise removing portion 33 from control part 47.Characteristic 131 is required voltage values in noise removing portion 33, and this above magnitude of voltage is output to noise removing portion 33 from control part 47 all the time.
Though it is not shown in Figure 12, but passed through the signal of characteristic 130 of Figure 13 of the inductor 69 in the noise removing portion 33, be conditioned the magnitude of voltage that device (not shown) constant voltage turns to the characteristic 131 of Figure 13, afterwards, offer each active element that constitutes noise removing portion 33.
In addition, carry out the control of control part 49 by the control signal that generates according to the characteristic 132 more than the magnitude of voltage of the characteristic 131 of Figure 13 to the magnitude of voltage of the quadravalence section of characteristic 135.By adopting such structure, do not need the transmission line that configuration control signal is used and power supply is used respectively, can improve manufacturing efficient.
In addition, in Figure 13, the structure of supplying with about to the control signal of noise removing portion 33, power supply has been described, but also can have been undertaken the control signal of adapter 38, the supply of power supply by same method.Thus, can improve the manufacturing efficient of the electronic equipment that noise elimination apparatus has been installed.
(execution mode 3)
Below, the noise elimination apparatus of use description of drawings embodiments of the present invention 3.Figure 14 A is the top perspective view of the noise elimination apparatus in the embodiments of the present invention 3, and Figure 14 B is the below stereogram of noise elimination apparatus, and Figure 14 C is the face side view that the main substrate of noise elimination apparatus is installed.
In Figure 14 A, 14B, noise elimination apparatus 30 comprises: the ground pattern 71 that the surface forms above the matrix 70 that is made of medium or magnetic; First antenna 32 that forms in the surface below of matrix 70; And the auxiliary substrate of in the pit 73 of the surface below centre that is formed at matrix 70, installing 72.Noise removing portion 33 is installed on auxiliary substrate 72, and is electrically connected with first antenna 32.
The noise elimination apparatus 30 of Figure 14 A, 14B is installed in the top of main substrate 52, makes its lower face side is sealed to main substrate 52.When mounted, be formed on the ground pattern 74 on the main substrate surface of ground pattern 71 on the lower surface of Figure 14 B and Figure 14 C by electrical connections such as scolders.
In addition, be pre-formed ground pattern (not shown) at the back side of main substrate 52, and be electrically connected with the ground pattern 74 of main substrate 52.By such structure, can realize the shield 31 of Fig. 1 according to the mode of roughly surrounding noise source (not shown).
The pad 75 of Figure 14 C is electrically connected with carrying tuner (not shown) on main substrate 52 or control part (not shown) etc. in advance, and by scolder etc. the pad 76 that is electrically connected with the noise removing portion 33 of Figure 14 B and the pad 75 on the main substrate 52 is electrically connected.
If use as shown in Figure 14B first antenna 32, ground pattern 71, noise removing portion 33 incorporate modules, then can make noise elimination apparatus miniaturization of the present invention, do not need as shown in Figure 2 transmission line 54 to be configured in the outside of shield 31, so can prevent situation by transmission line 54 received television signals yet.
In addition, in Figure 14 B, noise removing portion 33 is installed in auxiliary substrate 72 carries matrix 70 afterwards, but also noise removing portion 33 directly can be installed on matrix 70.Thus, can improve the manufacturing efficient of noise elimination apparatus 30.
(execution mode 4)
Below, the noise cancellation module of use description of drawings embodiments of the present invention 4.Figure 15 A is the vertical view of the noise cancellation module in the embodiments of the present invention 4, and Figure 15 B is the upward view of noise cancellation module.
In Figure 15 A, 15B, noise cancellation module 80 comprises: the ground pattern 78 that forms on the back side of auxiliary substrate 77; Be formed on second antenna 37 in the zone that does not form ground pattern 78 on the back side on the surface of auxiliary substrate 77; And be formed with first antenna 32 and noise removing portion 33 in the zone of ground pattern 78 on overleaf in the surface configuration of auxiliary substrate 77.
The place of the noise source of the noise that receives in second antenna 37 is many near the situation in the place of second antenna 37.This is because along with away from noise source, the electric field of noise or magnetic field are gradually with the cube decay of distance.
Since by noise elimination apparatus 30 want the noise source position of the noise eliminated be positioned at second antenna 37 near, so shown in Figure 15 A, if provide with noise elimination apparatus 30 and second antenna, 37 incorporate noise cancellation module, then miniaturization can be realized, the fade performance of the reception noise of second antenna 37 can be improved simultaneously.
In addition, shown in Figure 15 A, 15B, also can in noise cancellation module 80, carry adapter 38, tuner 39, demodulation section 40 etc.Thus, can realize miniaturization, and the miniaturization and of the electronic equipment of noise cancellation module of the present invention has been carried in promotion.
In addition, also can adopt flexible base, board as auxiliary substrate 77, the face side formation adhesive portion at auxiliary substrate 77 is configured on the main substrate via this adhesive portion.Thus, can improve the easiness of carrying main substrate.
In addition, do not form ground pattern 78 at the back side in the zone that is formed with second antenna 37, thus, second antenna 37 can improve radiation resistance, and can improve the receptivity of TV signal.Thus, can increase the S/N ratio of expectation such as TV signal ripple and noise.
(utilizability on the industry)
According to the present invention, because first antenna is configured in the shield, so can suppress from the reception of the desired signals such as TV signal of outside arrival, in addition, by the noise of shield blocking-up near the noise source first antenna, thereby make it be difficult to be input to second antenna, so can realize having the noise elimination apparatus of high receptivity. Therefore, noise elimination apparatus of the present invention can be used for various electronic equipments, communication equipment etc., can improve the receptivity of these equipment.
Claims (12)
1. noise elimination apparatus comprises:
First antenna, it is configured in the shield; And
Noise removing portion, the noise signal that its input receives in described first antenna from noise source,
Described noise removing portion makes the noise signal decay from described noise source that high-frequency signal comprised that receives based on the signal from described first antenna input in second antenna.
2. noise elimination apparatus according to claim 1, wherein,
Described first antenna is the balanced type antenna.
3. noise elimination apparatus according to claim 1, wherein,
Be electrically connected described first antenna and described noise removing portion by the balanced type transmission line.
4. noise elimination apparatus according to claim 1, wherein,
Described noise removing portion is configured in the shield identical with described first antenna.
5. noise elimination apparatus according to claim 1, wherein,
Described shield is made of conductive pattern on the substrate and shield parts,
Described first antenna is formed by the surface or the inboard conductive pattern of described shield parts.
6. noise elimination apparatus according to claim 1, wherein,
Described shield is made of conductive pattern on the substrate and shield parts,
Described first antenna is formed by the surface or the inboard conductive pattern of antenna element, and described antenna element is fixed on the inboard of described shield parts.
7. noise elimination apparatus according to claim 5, wherein,
Described noise removing portion is installed in the described shield parts.
8. noise elimination apparatus according to claim 6, wherein,
Described noise removing portion is installed in the described antenna element.
9. noise elimination apparatus according to claim 5, wherein,
Described shield parts have flexibility.
10. noise elimination apparatus according to claim 1, wherein,
What receive in described first antenna is imported into described noise removing portion from the noise signal of described noise source via amplifier.
11. a noise cancellation module comprises:
First antenna, it is configured in the shield;
Noise removing portion, the noise signal that its input receives in described first antenna from noise source; And
Second antenna, it is configured in outside the described shield,
Described noise removing portion makes the noise signal decay from described noise source that high-frequency signal comprised that receives based on the noise signal from described noise source from described first antenna input in described second antenna.
12. an electronic equipment comprises:
The described noise cancellation module of claim 11;
Signal processing part, it is electrically connected with described noise cancellation module; And
Display part, it is electrically connected with described signal processing part.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008209634 | 2008-08-18 | ||
| JP2008-209634 | 2008-08-18 | ||
| PCT/JP2009/003733 WO2010021096A1 (en) | 2008-08-18 | 2009-08-05 | Noise cancellation device, and noise cancellation module and electronic device using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102124657A true CN102124657A (en) | 2011-07-13 |
Family
ID=41706989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009801319596A Pending CN102124657A (en) | 2008-08-18 | 2009-08-05 | Noise cancellation device, and noise cancellation module and electronic device using same |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5104953B2 (en) |
| CN (1) | CN102124657A (en) |
| WO (1) | WO2010021096A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110632976A (en) * | 2018-06-22 | 2019-12-31 | 联想（新加坡）私人有限公司 | Electronic device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4351010A1 (en) * | 2022-10-06 | 2024-04-10 | Electronics and Telecommunications Research Institute | Wireless signal receiver device |
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| CN1127571A (en) * | 1994-03-11 | 1996-07-24 | 摩托罗拉公司 | A balun apparatus and method of designing same |
| JPH10242876A (en) * | 1997-02-27 | 1998-09-11 | Kokusai Electric Co Ltd | Antenna built-in receiver |
| JP2000068872A (en) * | 1998-08-17 | 2000-03-03 | Nec Corp | Interference prevention receiver and interference prevention method |
| US20030224751A1 (en) * | 2002-06-04 | 2003-12-04 | Sierra Wireless, Inc. | Adaptive noise reduction system for a wireless receiver |
| US20040042569A1 (en) * | 2002-09-03 | 2004-03-04 | Electro-Radiation Incorporated | Method and apparatus to provide communication protection technology for satellite earth stations |
| CN1918805A (en) * | 2005-01-17 | 2007-02-21 | 松下电器产业株式会社 | Turner, and mobile device using the same |
| CN101106664A (en) * | 2006-07-13 | 2008-01-16 | 松下电器产业株式会社 | Portable device |
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2009
- 2009-08-05 JP JP2010525577A patent/JP5104953B2/en not_active Expired - Fee Related
- 2009-08-05 CN CN2009801319596A patent/CN102124657A/en active Pending
- 2009-08-05 WO PCT/JP2009/003733 patent/WO2010021096A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1127571A (en) * | 1994-03-11 | 1996-07-24 | 摩托罗拉公司 | A balun apparatus and method of designing same |
| JPH10242876A (en) * | 1997-02-27 | 1998-09-11 | Kokusai Electric Co Ltd | Antenna built-in receiver |
| JP2000068872A (en) * | 1998-08-17 | 2000-03-03 | Nec Corp | Interference prevention receiver and interference prevention method |
| US20030224751A1 (en) * | 2002-06-04 | 2003-12-04 | Sierra Wireless, Inc. | Adaptive noise reduction system for a wireless receiver |
| US20040042569A1 (en) * | 2002-09-03 | 2004-03-04 | Electro-Radiation Incorporated | Method and apparatus to provide communication protection technology for satellite earth stations |
| CN1918805A (en) * | 2005-01-17 | 2007-02-21 | 松下电器产业株式会社 | Turner, and mobile device using the same |
| CN101106664A (en) * | 2006-07-13 | 2008-01-16 | 松下电器产业株式会社 | Portable device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110632976A (en) * | 2018-06-22 | 2019-12-31 | 联想（新加坡）私人有限公司 | Electronic device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2010021096A1 (en) | 2012-01-26 |
| WO2010021096A1 (en) | 2010-02-25 |
| JP5104953B2 (en) | 2012-12-19 |
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Application publication date: 20110713 |