JP6491307B1 - Noise canceller device - Google Patents

Abstract

The present invention provides a noise canceller device capable of stabilizing the earth potential more continuously.
A noise canceller device is connected between an electrode plate and a metal sheet by a wound body 13 in which a sheet body provided with an electrode plate is superimposed on a copper plate sheet and wound in a coil shape, noise from the sheet body And a phase rotation circuit 32 for rotating the phase of the component and returning it to the copper sheet. The first vibration damping sheet and the second vibration damping sheet that constitute the sheet body are made of materials that convert electrical energy into thermal energy and consume it.
[Selected figure] Figure 6

Description

  The present invention relates to a noise canceller such as a choke coil that stabilizes the ground potential of an acoustic device and an electric component and removes ground noise.

  As a conventional noise canceller device, for example, Patent Document 1 discloses a noise removing device externally attached to an output connector of a condenser microphone that supplies power by a phantom power system.

  However, the noise separated by the noise removal device of Patent Document 1 is superimposed again on the signal line of the device via the ground. In order to solve this problem, the applicant of the present invention is connected to a laminated unit in which a sheet assembly including a semiconductor sheet provided with an electrode plate is wrapped in a metal foil by sandwiching a sheet assembly between metal plates and connected to the metal plate. Between the electrode plate and the metal plate, the connection portion for guiding the electric energy from the ground terminal to the stacked unit, the phase of the noise component from the sheet assembly is rotated, and the stacked unit is A noise canceller device is proposed, which includes a phase rotation circuit for returning, and the semiconductor sheet is made of a material that converts electrical energy into thermal energy and consumes it (see, for example, Patent Document 2).

JP, 2012-60276, A Unexamined-Japanese-Patent No. 2016-100826

  However, there has been a demand for the development of a device for further continuously stabilizing the earth potential in the external circuit.

  Further, the noise canceller device of Patent Document 2 is connected only to the ground terminal of the audio equipment, sends out a signal component including ground noise from the ground terminal to the noise canceller device to remove the noise component, and the noise is transmitted to the same ground terminal. A configuration is adopted in which the removed signal component is returned. However, although this configuration can remove the ground noise generated at the ground terminal, it can not send out the signal component from which the noise has been removed to the ground terminal different from the ground terminal from which the signal component was sent. Since the noise canceller device can not be applied between the devices connected by the like, the application place of the noise canceller device has been limited.

  Therefore, in view of the above circumstances, the present invention provides a noise canceller device capable of stabilizing the ground potential more continuously by effectively removing noise or preventing the mixing of ground noise to the outside. As the first objective.

  Another object of the present invention is to provide a noise canceller device that can be applied to various devices.

  In the noise canceller device of the invention according to the first aspect of the present invention, a semiconductor device having an electrode plate is superposed on a metal sheet and wound into a coil shape, and is connected between the electrode plate and the metal sheet. A phase rotation circuit that rotates the phase of the noise component from the sheet and returns it to the metal sheet, and the semiconductor sheet is made of a material that converts electrical energy into thermal energy and consumes it. Do.

  The noise canceller apparatus according to the invention of claim 2 is characterized in that input means for inputting a signal component from the outside and output means for outputting a signal component to the outside are connected to the metal sheet.

  According to the invention of claim 1, an inductance is generated by using a metal sheet having a good conductivity and making the coil-like body wound with the semiconductor sheet between the metal sheets function like a choke coil. Alternating current noise is prevented, and further, the flow of current from the outside to the metal sheet is formed, and the flow of noise components to the semiconductor sheet is formed. Can be converted to thermal energy and consumed efficiently. Further, by providing the electrode sheet on the semiconductor sheet, the noise current is separated from the noise component attenuated by the semiconductor sheet through the electrode plate serving as the noise detection electrode, and the separated noise current passes through the phase rotation circuit. Since the metal sheet cancels out, noise of the signal component input from the outside connected to the noise canceller can be effectively removed or ground noise can be effectively prevented from being mixed in the outside of the output destination of the signal component. Therefore, the ground potential in the external electronic circuit can be stabilized more continuously than the conventional noise canceller device.

  According to the invention of claim 2, by having not only the input means but also the output means, the noise canceller device can be inserted "serially" to the outside of the connection destination and can be inserted and connected. The device can be applied.

It is a perspective view showing the appearance composition about the noise canceller device in one desirable embodiment of the present invention. It is a perspective view which shows the internal structure which made the upper case upside down the same as the above. It is a figure which shows the procedure until it obtains a winding body same as the above. It is a perspective view of a winding body same as the above. It is a perspective view of a noise canceller unit same as the above. FIG. 6 is a circuit diagram showing an electrical configuration including the connection between a wound body and a phase rotation circuit. It is explanatory drawing which shows the use condition which inserted and connected in series with the machine of a connecting point same as the above.

  Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a noise canceller device according to the present invention will be described.

  First, referring to FIG. 1, the external configuration of the noise canceller device will be described. 1 is a case forming an outline of the device, 2 is a terminal provided on the front of the case 1 with a signal line and a ground line In this case, four RCA terminals 2 are provided. The terminals 2A and 2B are paired, and the terminals 2C and 2D are paired. The housing 1 has a substantially rectangular parallelepiped shape, and has a substantially rectangular shape in which a front surface and a rear surface, and a left surface and a right surface face each other as viewed from above, and a lower surface is opened. The whole is constituted by the bottom plate 5 covering the opening, and the terminals 2A, 2B, 2C and 2D are provided on the front surface of the upper case 4 as a terminal block of the terminals 2. Then, the upper case 4 is overlaid so as to cover the bottom plate 5, and a screw (not shown) is inserted into the holes 6 (see FIG. 2) drilled at the four corners of the bottom plate 5. The upper case 4 and the bottom plate 5 are fixed by being screwed into the female screw portion 7 (see FIG. 2) provided on the bottom plate 5 via the bottom plate 5, and a substantially rectangular parallelepiped shaped internal portion is fixed between the upper case 4 and the bottom plate 5. Space 8 is formed. The external shape of the device and the number of terminals 2 are not limited to those shown in FIG. Also, in order to make it easy to understand when connecting with external equipment such as audio equipment and electronic equipment, the terminals 2A, 2B and terminals 2C, 2D have different terminal colors, and the installation of the terminals 2B, 2C of the upper case 4 "IN" may be described near the place, and "OUT" may be described near the installation place of the terminals 2A and 2D of the upper case 4.

  Next, an internal configuration of the noise canceller device will be described with reference to FIG. A noise canceller unit 11 is provided in the internal space 8 of the housing 1. The noise canceller unit 11 is mainly composed of a base 12 made of aluminum and having a rectangular flat plate shape, and a wound body 13 and a circuit unit 14 for ground noise canceling provided on the base 12. In the present embodiment, two wound bodies 13 and two circuit units 14 are provided, respectively, and the first wound body 13A and the first circuit unit 14A are paired, and the second wound body 13B and the second wound body 13B are provided. The second circuit units 14B are paired. Further, the lead wire 29 (see FIG. 3C) disposed in the vicinity of the edge portion of the first wound body 13A is connected to the ring of the terminal 2A serving as the ground wire, and the center of the wound body 13A By connecting the lead wire 28 (see FIG. 3 (c)) disposed in the portion with the ring of the terminal 2B serving as the ground wire, electrical connection is achieved, and in the vicinity of the edge of the wound body 13B. The lead wire 29 disposed is electrically connected to the ring of the terminal 2D serving as the ground wire and the lead wire 28 disposed at the central portion of the wound body 13B with the ring of the terminal 2C serving as the ground wire. Connection is made possible. Then, by connecting the pin of the terminal 2A serving as a signal line and the pin of the terminal 2B with the lead wire 30, an electrical connection can be made, and a terminal 2C serving as a signal line. The electrical connection is made by connecting the pin of the terminal 2D and the pin of the terminal 2D with the lead wire 30. The connection between the wound body 13 and the circuit unit 14 will be described later. The bottom plate 5 has an external thread 17 for fixing the noise canceller unit 11, and the external thread 17 is inserted through holes 19 (see FIG. 5) drilled at the four corners of the metal plate 12. By fixing, the noise canceller unit 11 is fixed to the bottom plate 5.

  3 to 5 sequentially show the assembly process of the noise canceller unit 11. FIG. The configuration of the noise canceller will be described in more detail based on these figures.

  FIG. 3A shows a copper or silver electrode plate 22 to which one end of a lead wire 21 is connected, and a first damping sheet 23 formed in a substantially horizontally long rectangular shape. The electrode plate 22 acts as a noise detection electrode, and in this case, five electrode plates 22 having lead wires 21 are placed at substantially equal intervals on one surface of the first damping sheet 23. There is. In addition, the external appearance shape, the number, etc. of the electrode plate 22 are not limited to what is shown to (a). After that, as shown in (b), a sheet body 25 is formed by bonding a second damping sheet 24 having substantially the same shape as the first damping sheet 23 so as to fit the first damping sheet 23 exactly. Ru.

  The first damping sheet 23 and the second damping sheet 24 are semiconductor sheets, and any damping material that converts vibration energy generated from an acoustic device or electronic device into electrical energy and finally converts it into thermal energy is Used. This material is an organic polymer hybrid damping material in which a functional material having conductivity, piezoelectric and dielectric properties is dispersed in a polymer, and is named "PIEZON sheet" manufactured by Kiso Industry Co., Ltd. Have already been commercialized (for details, see, for example, Japanese Patent Application Laid-Open No. 2013-228097). In the present embodiment, the first vibration control sheet 23 and the second vibration control sheet 24 are selectively used in the sound quality adjustment material fo. It is trade name "TA-32" by q. As described above, the first vibration control sheet 23 and the second vibration control sheet 24 to be semiconductor sheets are attached to each other, and the electrode plate 22 is sandwiched between the two semiconductor sheets to form an electrode plate. The insulation between 22 is maintained. Further, as described later, when making the copper sheet 26 into a coil shape, the first vibration damping sheet 23 and the second vibration damping sheet 24 are wound around the copper sheet 26 so that the wound body 13 serves as a choke coil. Become effective.

  When the first damping sheet 23 is bonded to the second damping sheet 24 to obtain the sheet 25 in which the electrode plate 22 is encapsulated, as shown in (c), the first damping sheet 23 or the second damping sheet 23 is used. The second damping sheet 24 is provided on one side surface of the copper sheet 26 which has substantially the same shape as the damping sheet 24 and is provided with the lead wires 27 and 28 at both ends and the lead wire 29 near the lead wire 27. The other side surface of the first damping sheet 23 not attached is placed. At this time, for example, in the sheet assembly of the earth element shown in Patent Document 2, this sheet assembly is covered with copper foil and silver foil and the crucible is also made to act as a rectifying diode. When the coil 26 is coiled, the surface portions of the copper sheet 26 are electrically connected via the silver foil, and the coil is not formed. Therefore, in the present embodiment, the sheet 25 is not covered with the silver foil. Is adopted. In the present embodiment, a copper plate is employed to form the wound body 13 with the copper sheet 26. For example, a metal having good conductivity such as a gold plate or a silver plate is employed to substitute for the copper sheet 26. It is also good.

  As shown in FIG. 4, the sheet 25 is placed on the copper sheet 26 and superimposed, and then the copper sheet 26 is coiled from the side end on the lead wire 28 side so as to wind the sheet 25 inward. The wound body 13 as a choke coil in which the lead wire 28 side is the center portion and the lead wires 27 and 29 side is the edge portion is obtained. With this configuration, the noise canceller device can be miniaturized because it can be made compact as compared with the above-described sheet assembly of the prior art earth element.

  FIG. 5 shows a state in which the first and second wound bodies 13A and 13B as the completed wound body 13 and the first and second circuit units 14A and 14B are attached and fixed to the base 12. . The first circuit unit 14A is connected between each lead wire 21 and a lead wire 27 drawn from one side and the other side of the first wound body 13A, and the second circuit unit 14B is It is connected between each lead wire 21 and lead wire 27 drawn out from one side and the other side of winding object 13B, respectively. The first and second circuit units 14A and 14B each include a phase rotation circuit 32 (see FIG. 10) inside a resin casing 31. Although not shown here, the phase rotation circuit 32 is configured by mounting various electronic components on a printed circuit board. The noise canceller unit 11 configured as described above is electrically connected to each terminal 2 as shown in FIG. 2, the noise canceller unit 11 is fixed to the bottom plate 5, and the upper case 4 is mounted on the bottom plate 5 and mounted. Then, the appearance of the noise canceller shown in FIG. 1 is completed. In this embodiment, since the wound body 13 is made compact, a configuration is adopted in which two wound bodies 13A and 13B are incorporated into one noise canceller device.

  FIG. 6 shows the electrical configuration of the noise canceller including the connection between the winding body 13 and the phase rotation circuit 32. As shown in FIG. In the figure, the phase rotation circuit 32 includes a first circuit 41 having resistors R1 and R2 in addition to the capacitor C1, a second circuit 42 having resistors R3 and R4 in addition to the capacitors C2 and C3, and a capacitor C4. , C5, C6, and a third circuit 43 provided with resistors R5, R6.

  The first circuit 41 connects the lead 21 drawn from the electrode plate 22 closest to the end closest to the lead wire 28 to one end of the parallel circuit of the capacitor C1 and the resistor R1. Between the other end and the lead wire 27, a resistor R2 is connected. The third circuit 43 is a lead drawn from the electrode plate 22 closest to the end closest to the lead wire 27 or 29 at one end of a parallel circuit including the capacitors C4, C5, C6 and the resistor R5 connected in series. A wire 21 is connected, and a resistor R6 is connected between the other end of the parallel circuit and the lead wire 27. The second circuit 62 is a lead drawn from each electrode plate 22 which is not connected to the first circuit 41 or the third circuit 43 at one end of a parallel circuit including the capacitors C2 and C3 and the resistor R3 connected in series. A wire 22 is connected, and a resistor R4 is connected between the other end of the parallel circuit and the lead wire 27.

  As a result, in the first circuit 41, the phase of the noise component flowing in through the lead wire 21 is rotated by 90 degrees by the single capacitor C1, and returned from the resistor R2 to the wound body 13 via the lead wire 27. In the second circuit 42, the phase of the noise component flowing in through the lead wire 21 is rotated (reversed) by 180 degrees by the two capacitors C2 and C3, and the resistor R4 passes through the lead wire 27 to the wound body 13 Will be returned. Furthermore, in the third circuit 43, the phase of the noise component flowing in through the lead wire 21 is rotated 270 degrees by the three capacitors C4, C5, C6, and returned from the resistor R6 to the wound body 13 via the lead wire 27. Is configured.

  The configuration of the phase rotation circuit 32 is not limited to that shown in FIG. In the present embodiment, the three first circuits 41 to 43 are combined, but it may be a phase inverting circuit configured only by the second circuit 42, such as the capacitors C1 to C6 and the resistors R1 to R6. In addition to the passive elements, various active elements may be incorporated.

  (A) to (C) of FIG. 7 show the usage state of the noise canceller device in the above configuration, and in (A), an AV output terminal OW (stereo left) capable of outputting an analog signal of stereo sound and an AV output For example, a power amplifier including a terminal OR (stereo right), an audio device M such as a CD player, and an AV input terminal IW (stereo left) capable of inputting an analog signal of audio and an AV input terminal IR (stereo right) , And a state where a noise canceller device is inserted and connected between the audio amplifiers OA and the like.

  Conventionally, the AV output terminal OW of the audio device M and the AV input terminal IW of the audio amplifier OA are directly connected by a lead, while the AV output terminal OR of the audio device M and the AV input terminal IR of the audio amplifier OA are connected Directly connected to input an analog signal from the audio device M to the audio amplifier OA. In the present embodiment, as shown in (A), the AV output terminal OW of the audio device M and the terminal 2C of the housing 1 are connected by the conducting wire S1, and the terminal 2D of the housing 1 and the AV input terminal of the audio amplifier OA. The IW is connected with the conducting wire S2, while the AV output terminal OR of the audio device M and the terminal 2B of the housing 1 are connected with the conducting wire S3, and the terminal 2A of the housing 1 and the AV of the audio amplifier OA are connected. A noise canceller device is used in series with the audio equipment M and the audio amplifier OA by connecting the input terminal IR to the lead S4.

  As a result, when a signal component flows from the pin serving as the signal line of the AV output terminal OW of the audio device M to the pin of the terminal 2C through the conducting wire S1, this signal component passes through the lead wire 30 and the noise canceller unit 11 Without passing through, it is sent out from the pin of the terminal 2D as it is, and is inputted to the pin which becomes the signal line of the AV input terminal IW of the audio amplifier OA through the conducting wire S2. On the other hand, when a signal component containing noise flows into the ring of the terminal 2C from the ring serving as the ground line of the AV output terminal OW of the acoustic device M and flows into the ring of the terminal 2C, the signal component containing this noise passes through the lead 28 And flow into the copper sheet 26 of the second wound body 13B constituting the noise canceller unit 11, but the second wound body 13B wound in a coil shape with the sheet 25 serving as a semiconductor sheet interposed therebetween serves as a choke coil. It functions and inductance is generated to block the AC noise of the signal component, and the blocked AC noise does not flow into the copper sheet 26. On the other hand, when the blocked AC noise is transmitted to the sheet 25, there is a potential fluctuation of the AC noise due to the conversion action from electrical energy to heat energy by the first damping sheet 23 and the second damping sheet 24. Absorbed and consumed. Thereafter, noise current is separated from the AC noise attenuated by the sheet 25 through the electrode plate 22 serving as a noise detection electrode, and sent out to the phase rotation circuit 32 in the circuit unit 14B.

  In the phase rotation circuit 32, one capacitor C1 in the first circuit 41 rotates the phase of the noise current separated by the electrode plate 22 closest to the end closest to the lead wire 90 by 90 degrees, The capacitors C 4, C 5 and C 6 in the circuit 43 rotate the phase of the noise current separated by the electrode plate 22 closest to the end closest to the lead wires 27 and 29 by 270 degrees, and two in the second circuit 62 The capacitors C2 and C3 rotate the phase of the noise current separated by each of the electrode plates 22 not connected to the first circuit 41 and the third circuit 43 by 180 degrees. These phase-rotated noise currents are sent out from the phase rotation circuit 32 to the lead wire 27 through the resistors R2, R4, R6, and are transmitted to the copper sheet 26 and canceled each other. Thus, the signal component from which the noise has been removed and the DC signal component are sent from the ring of terminal 2D via lead wire 29, and via lead wire S2 to the ring that becomes the ground line of AV input terminal IW of audio amplifier OA. It is input.

  Similarly, when a signal component flows from the pin serving as the signal line of the AV output terminal OR of the audio device M to the pin of the terminal 2B from the pin serving as the signal line of the audio device M, this signal component is the lead 30 The signal is sent from the pin of the terminal 2A as it is without passing through the noise canceller unit 11, and is inputted to the pin serving as the signal line of the AV input terminal IR of the audio amplifier OA via the lead S4. On the other hand, when a signal component including noise flows into the ring of the terminal 2B from the ring serving as the ground line of the AV output terminal OR of the audio device M and the ring of the terminal 2B flows, the signal component including the noise passes through the lead 28 Flow into the copper sheet 26 of the first coil 13A of the noise canceller unit 11, but the AC noise of this signal component is blocked by the inductance of the first coil 13A functioning as a choke coil. The electric power is transmitted from the first damping sheet 23 and the second damping sheet 24 to the heat energy, whereby the potential fluctuation of the blocked AC noise is absorbed and consumed. Thereafter, the noise current is separated through the electrode plate 22 and sent out to the phase rotation circuit 32 in the circuit unit 14A, phase rotation is performed with each noise current, and the phase rotation circuit 32 via the resistors R2, R4 and R6. Are fed to the lead wires 27 and transmitted to the copper sheet 26 to cancel each other. Thus, the signal component from which noise has been removed and the signal component from direct current are sent from the ring of terminal 2A via lead wire 29, and via lead wire S4 to the ring as the ground wire of AV input terminal IR of audio amplifier OA. It is input.

  Thus, when the noise canceller device of this embodiment is connected in series with the audio device M and the audio amplifier OA, and used in series with the ground wire between the audio device M and the audio amplifier OA, the ring of the AV output terminal OW And noise from the signal component including noise flowing in from the ring of the AV output terminal OR by removing the noise and sending it out to the ring of the AV input terminal IW of the audio amplifier OA or the ring of the AV input terminal IR. To make the music signal clear.

  In the noise canceller device of the present embodiment, besides being used by being inserted between devices as described above (A), for example, it is used by being serially used in a grounding circuit of electric parts such as a central processing unit and an operational amplifier. can do. FIG. 7B shows a state in which the noise canceller device of the present embodiment is used in series with the ground wire of the central processing unit CPU. Here, the ground terminal GND of the central processing unit CPU and the ring of the terminal 2A of the housing 1 are connected by the conducting wire S5, and the other end of the conducting wire S6 whose one end is connected to the ring of the terminal 2B of the housing 1 is grounded Connected to E, a noise canceller is used in series with the central processing unit CPU.

  Even in this case, as in the case of (A), when ground noise flows from the ground E through the lead wire S6 into the ring of the terminal 2B, the ground noise flows through the lead wire 28 of the first wound body 13A. The ground noise is blocked by the inductance generation of the first wound body 13A that functions as a choke coil but flows into the sheet 25, and the first damping sheet 23 and the second damping sheet 24 flow into the copper sheet 26. As a result of the conversion of electrical energy into thermal energy, the potential fluctuation of the blocked ground noise is absorbed and consumed. Thereafter, of the ground noise attenuated by the sheet 25, the noise current is separated through the electrode plate 22 and sent out to the phase rotation circuit 32 in the circuit unit 14A, and the phase rotation is performed with each noise current. It is sent out to the lead wire 27 from the phase rotation circuit 32 through R2, R4 and R6, and is transmitted to the copper sheet 26 to be canceled each other. Thus, even when the noise canceller device of this embodiment is used in series with the ground circuit of the central processing unit CPU, the ground noise generated on the ground E is eliminated, and the ground terminal is mounted on the electronic circuit to which the central processing unit CPU is attached. Ground noise can be prevented from being mixed via GND.

  FIG. 7C also shows a state in which the noise canceller device of this embodiment is used in series in the ground circuit of the operational amplifier AMP. Here, the negative power supply terminal of the operational amplifier AMP is used as the ground terminal GND, the ground terminal GND and the ring of the terminal 2A of the housing 1 are connected by the conducting wire S7, and one end is the ring of the terminal 2B of the housing 1 The other end of the conducting wire S8 connected to is connected to earth E, and a noise canceller device is used in series with the operational amplifier AMP. Also in this case, as in the case of (B) described above, the ground noise generated on the ground E is removed to prevent the ground noise from being mixed into the electronic circuit to which the operational amplifier AMP is attached via the ground terminal GND. be able to.

  In the noise canceller device of the present embodiment, the sheet 25 is formed by sandwiching the electrode plate 22 made of a silver plate or a copper plate between the first vibration damping sheet 23 and the second vibration damping sheet 24 to be semiconductor sheets. By forming the wound body 13 which is configured to be wound in a coil shape by being superimposed on 26, AC noise generated in the ring of the AV output terminal OW and the ring of the AV output terminal OR of the acoustic device M or earth E To prevent the ground noise from flowing into the copper sheet 26 while absorbing the blocked noise into the semiconductor sheet and converting it into thermal energy and consuming it to stabilize the earth potential. is there. That is, by using the copper sheet 26 having good electrical conductivity, the flow of current from the ring of the AV output terminal OW or the ring of the AV output terminal OR to the copper sheet 26 or the current from the ground E to the copper sheet 26 By forming a flow and winding the copper sheet 26 in a coil shape to form the wound body 13, the flow of AC noise and ground noise to the sheet 25 can be obtained by the trade name "PIEZON sheet" manufactured by Kiso Kogyo Co., Ltd. As a result, it is efficiently consumed by converting the electrical energy of the noise component into thermal energy.

  Further, the noise currents separated through the electrode plate 22 have their phases rotated through the capacitors C1 to C6 of the phase rotation circuit 32, and are returned to the copper sheet 26 through the resistors R2, R4, and R6 to cancel each other. . Thereby, noise of the signal component from the ring of the AV output terminals OW and OR of the audio equipment M connected to the noise canceller can be effectively eliminated or electrical parts such as the central processing unit CPU and the operational amplifier AMP can be attached. The electronic circuit can be effectively prevented from being mixed with the ground noise via the ground terminal GND, so that the earth potential in the audio amplifier OA or the above-mentioned electronic circuit can be further continuously stabilized.

  In particular, the semiconductor sheet (sound quality adjustment material fo.q sheet) used in the present embodiment is planar, and the contact resistance reduction effect is larger than that of the nanodiamond-added copper wire. It is thought that it plays a role of rubber. In addition, it is considered that the sound quality adjusting material used here has a large damping effect, and the dual effect of reducing the contact resistance and the damping is considered to be the reason why the SN ratio of the acoustic device M is greatly improved. In fact, the noise canceller device used in the present embodiment can achieve a high effect in noise removal as compared with the conventional noise canceller device shown in, for example, Patent Document 2. Therefore, the earth potential in the audio amplifier OA or central processing The earth potential in the electronic circuit to which the electric components such as the device CPU and the operational amplifier AMP are attached can be further stabilized continuously. Furthermore, since the conventional noise canceller device is connected "in parallel" to devices such as the audio device M, the audio amplifier OA, the central processing unit CPU, the operational amplifier AMP, etc. to which it is connected, the available location is limited. However, since the noise canceller device of the present embodiment can be used by being inserted and connected "in series" to these devices, it can be applied to various devices.

  As described above, the noise canceller device according to the present embodiment includes the coiled body 13 in which the sheet 25 as the semiconductor sheet provided with the electrode plate 22 is superimposed on the copper sheet 26 as the metal sheet and wound in a coil shape; A phase rotation circuit 32 connected between the plate 22 and the metal sheet 26 to rotate the phase of the noise component from the sheet 25 and return it to the copper sheet 26; The vibration sheet 23 and the second vibration control sheet 24 are made of materials that convert electric energy into heat energy and consume it.

  In this case, a good copper plate sheet 26 of a conductor is used, and the coiled body 13 wound in a coil shape sandwiching the sheet 25 by the copper plate sheet 26 functions as a choke coil to generate an inductance. Alternating current noise is prevented, and a current flow from the ring E of the AV output terminals OW and OR of the acoustic device M as the outside or from the ground E to the copper sheet 26 is formed, and noise components to the sheet 25 are Since a flow is formed, the electrical energy guided to the sheet 25 can be converted to thermal energy and efficiently consumed by the sheet 25. Further, by providing the electrode plate 22 in the sheet 25, the noise current is separated from the noise components attenuated by the sheet 25 through the electrode plate 22 serving as a noise detection electrode, and the separated noise current has a phase Since it is canceled by the copper sheet 26 through the rotation circuit 57, the noise of the signal component input from the audio equipment M connected to the noise canceller can be effectively eliminated or the central processing unit CPU or operational amplifier to which the signal component is output Ground noise can be effectively prevented from being mixed into the electronic circuit to which AMP is attached via the ground terminal GND. Therefore, the earth potential in the audio amplifier OA or the above-mentioned electronic circuit can be stabilized more continuously than in the conventional noise canceller device.

  Further, the noise canceller device in the present embodiment is a lead wire 28 as an input means for inputting a signal component from the AV output terminals OW, OR or the ground E of the audio equipment M as the outside through the ring of the terminals 2B, 2C. And a lead wire 29 as an output means for outputting a signal component to the audio amplifier OA as the outside, the central processing unit CPU, and the operational amplifier AMP via the terminals 2A and 2D, connected to the copper sheet 26 There is.

  In this case, by having not only the lead wire 28 but also the lead wire 29, the casing 1 of the noise canceller device can be used as opposed to the connection destination audio device M, the audio amplifier OA, the central processing unit CPU, the operational amplifier AMP and the like. It becomes possible to insert and connect "in series", and the noise canceller can be applied to various devices.

  The present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, the metals shown in the embodiments include a single element or an alloy. Although the coiled body 13 and the circuit unit 14 according to the embodiment are provided in the noise canceller unit 11 two by two, the number of the coiled body 13 and the circuit unit 14 is not limited to this. It may be less. And although the terminal 2 shown by embodiment is an RCA terminal, you may apply the terminal 2 by other various systems.

13 wound body 22 electrode plate 23 first damping sheet (semiconductor sheet)
24 2nd damping sheet (semiconductor sheet)
25 sheet body (semiconductor sheet)
26 Copper sheet (metal sheet)
28 Lead wire (input means)
29 Lead wire (output means)
32 phase rotation circuit M sound equipment (external)
OA audio amplifier (external)
E ground (external)
CPU central processing unit (external)
AMP op amp (external)

Claims (2)

A wound body in which a semiconductor sheet provided with an electrode plate is stacked on a metal sheet and wound in a coil shape;
A phase rotation circuit connected between the electrode plate and the metal sheet to rotate the phase of the noise component from the semiconductor sheet and return it to the metal sheet;
The noise canceller device, wherein the semiconductor sheet is made of a material that converts electrical energy into thermal energy and consumes it.   The noise canceller apparatus according to claim 1, characterized in that input means for inputting a signal component from the outside and output means for outputting the signal component to the outside are connected to the metal sheet.

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