TW443040B - Signal receiving apparatus - Google Patents

Abstract

The problem of this invention is that it is difficult to miniaturize the signal receiving apparatus for receiving signal in the conventionally known middle wave broadcast due to the fact that the winding coil of ferrite core with about 5 cm long is used at the antenna portion and the ferrite core forms a diamagnetic field in the magnetization direction. The solving means of this invention is described in the following. At the antenna portion 11, ribbon-shaped or wire-shaped magnetic impedance effect device 1b is used to examine the variation of magnetic field composition for the received electric wave signal. The length of magnetic impedance effect device 1b is 0.1 mm to 10 mm, such that the size of antenna portion 11 can be apparently minimized.

Description

f 443 040 a7 _ ._B7 _______ V. Description of the invention (1). [Technical field to which the invention belongs] The present invention relates to a receiving device having an antenna section, a tuning circuit, and a detection circuit, and particularly to the above antenna section. The antenna section uses a magneto-impedance effect element in the stomach, so that the antenna section can be miniaturized as a whole receiving device. [Advanced Technology] Figure 7 is a block diagram showing a conventional receiving device. The receiving device shown in FIG. 7 is an antenna unit 1 that converts a radio wave signal into an electric signal. In the medium wave receiving device, the antenna unit 1 is formed by using a high-permeability magnetic core of a ferrite magnet as a winding coil of the magnetic core. An antenna formed by a winding coil of a ferrite magnet core detects a magnetic field component of an electric wave. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the above-mentioned winding coil 圏 is composed of a primary winding 1 a and a secondary winding 1 b, and the two coils are inductive coupling. The primary winding 1 a and the variable capacitor 2 a for tuning are connected in parallel to form a tuning circuit 2. With this, the received signal of the tuning circuit 2 is the selected frequency. The received signal of the selected frequency is taken out from the secondary winding 1 b and amplified by the high-frequency amplifier circuit 3. The output M of the high frequency amplifying circuit 3 is a mixed signal of a carrier wave and an audio signal, and the detection circuit 4 at the subsequent stage removes the carrier from the mixed signal to detect audio. The detected audio signal is amplified by a low-frequency amplifier as required. The amplifier 5 amplifies the audio signal and outputs the sound or music from the speaker 6. -4- This paper size applies the Chinese National Standard (CNS) A4 specification (210x297 mm) r 443 04 0 A7 B7 V. Description of the invention (2) [Problems to be solved by the invention] However, the above-mentioned antenna unit 1 has the conventional knowledge. The magnetic winding of the ferrite magnet used has the disadvantage of being difficult to miniaturize. Generally, when a high-permeability magnetic core is used as the magnetic field to excite in the lengthwise direction of the magnetic core, an anti-magnetic field is formed in the magnetic core. Therefore, if the magnetic core is shorter than 10 m m, the sensitivity of magnetic field detection will deteriorate rapidly. Therefore, the conventional ferrite core antenna generally has a length of about 50 mm or more. In addition, ferrite magnets are fragile in nature, and they are difficult to handle during manufacture. In addition, circuits such as the detection circuit 4 or the amplifier circuits 3 and 5 are formed by integrated products: the circuit can be easily miniaturized. However, since the antenna unit 1 has a predetermined length or more as described above, it is difficult to miniaturize the entire device. The object of the present invention is to provide a receiving device for solving the above-mentioned problems, which can reduce the size of the antenna portion and reduce the size and integration of the entire device. [Means for solving the problem] Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs < Please read the precautions on the back before r- > lf-I) The receiving device of the present invention is provided with an antenna section and a tuning circuit. The receiving device with the detection circuit is characterized in that the antenna portion is provided with: a magnetic impedance effect element, a driving circuit for driving the AC signal to the magnetic impedance effect, and a rectified receiving radio wave signal with the driving circuit. The rectified signal of the mixed signal for driving the AC signal is separated from the frequency identifier for extracting the received radio wave signal from the mixed signal. The magnetic impedance effect refers to the following phenomenon. For forged band-shaped or linear magnetic bodies, when an AC current in the MΗz band is applied, the paper size at both ends of the magnetic body applies the Chinese National Standard (CNS) A4 specification (210 * 297 mm). 5- A7 Ministry of Economic Affairs Printed by the Intellectual Property Bureau's Consumer Cooperatives_B7_ V. Invention Description (3) An output voltage will occur based on the inherent impedance of the material. When an external magnetic field is applied in the length direction of the magnetic body in this state, even if the external magnetic field is a weak magnetic field with a degree of several gauss, the impedance of the magnetic body will change, and the amplitude of the output voltage will be equal to the external magnetic field intensity. 10% range change. The element with this magnetic impedance effect is an element that does not have an anti-magnetic field magnetization vector because it is excited in the outer peripheral direction of the element, that is, the anti-magnetic field in the length direction is small. Even if the element length becomes 1 mm, the magnetic field detection sensitivity is almost Will deteriorate. On the magnetic impedance effect element, electrodes connected to the driving circuit are formed at both ends. If the direction of the AC signal driving flow is regarded as an axis of difficult magnetization, the permeability in that direction will increase. It is better to increase the detection sensitivity. In addition, in the magnetic impedance effect element, when a bias (bUs) magnetic field is applied in the direction in which the AC signal flows, the change in the output voltage across the magnetic impedance effect element corresponding to the change in the magnetic field component of the broadcast wave becomes sensitive and more sensitive. good. The magnetic impedance effect element may be formed in a ribbon shape, or may be formed in a line shape. · The frequency of the driving AC signal is higher than the carrier frequency of the receiving radio wave signal. In the above-mentioned magnetic impedance effect element, the above-mentioned driving AC signal will not exhibit a magnetic impedance effect unless it is at a high frequency. The frequency of the above-mentioned driving AC signal ~ requires a minimum of several hundred kHz, but the driving AC signal is ---- ---------- Install --- (Please read the precautions on the back before this page) Order. --Line η This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) (%) -6- ^ 443040 A7 B7 V. Description of the invention (4) If the frequency is close to the carrier frequency of the receiving radio wave signal, it will become difficult to remove the driving AC signal from the mixed signal at a later stage. Although the frequency of medium wave broadcasting is located in a band higher than 500 kHz, even if the driving AC signal is lower than this, the frequency difference between the driving AC signal and the receiving radio signal is only a few hundred k.所以 z Therefore, it is difficult to remove the driving AC signal by a high-pass filter. On the other hand, the frequency of the driving AC signal is higher than that of the carrier frequency of the receiving radio wave signal, and the driving AC signal is removed. The allowable limit of the low-pass filter used can be high. Practically, the frequency of the driving signal can be dozens of times the frequency of the receiving radio wave signal. (1) The composition formula is formed by an amorphous soft alloy (F 6 1 ii C 0 a) I 0 0-xy (S ί 1 I) B h) x M y, M is C r, R Any one of u, or elements containing both, represents the composition ratio a, b is 0.05, aS 0.1, 0.2SbS0.8, and x, y are at% and satisfy the relationship of 10SxS35. As described above, if a exceeds the range of 0.05SaS0.1, the magnetic strain becomes large, which is not suitable. In addition, if b exceeds the range of 0.2 g a g 0. 8, it becomes difficult to make amorphous and unsuitable. In addition, if x exceeds the range of 10 S X S 3 5, it becomes difficult to make amorphous and unsuitable. When X > 35, it is not suitable because the magnetic properties are deteriorated. (2) The composition formula is represented by C ο T Tam H f η 'formed by an amorphous soft magnetic alloy with an amorphous structure as the main body' 1, m, η is at%, which can satisfy 70S1S90 '5 helmet mS21, 6-6 This paper size is applicable to China National Standard (CNS) A4 specification (210 X 297 mm) —------------ installed.! (Please read the notes on the back before G page) * e Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 443040 V. Description of the invention (5) ^ n ^ 15, l = m / nS2 · 5 relationship . (Please read the precautions on the back first, then this page) In the above C 〇a „series of soft magnetic alloys, the saturation magnetic flux density B s depends on the content of C 〇. In order to obtain a high saturation magnetic flux density Bs, 70S1 is required However, if it is 1290, it is not suitable because the specific resistance p becomes low.

Ta and H f are elements that want to obtain soft magnetic properties. By changing to 5S 21, 6SnS15, soft magnetic materials with large saturation magnetic flux density Bs and high resistivity P can be obtained. In addition, Hi is an element required for eliminating the negative magnetic strain constant A by Co-Ta. The magnetic strain constant λ depends on the ratio of the content of T a to the content of H f. If the magnetic strain constant λ is within the range of 1 m / n S 2.5, the magnetic strain constant λ can be well eliminated. (3) The composition formula is represented by F eh M i and is composed of a microcrystalline soft alloy with an amorphous structure as the main body. M is from T i, Z r, Hf, V 'Nb, Ta, W and rare earths. One or more elements selected by the element h, i, j are at at%, and can satisfy 45 $ 70 > 5 ^ i ^ 30 * 10 ^ j ^ 40 > h + i + j = 1 0 0 Relations "The printed clothing F of the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs is for those who want to obtain a large saturation magnetic flux density B s, and M is for the oxide in the amorphous phase, which makes the resistivity ρ larger. If h + i + j is in the above range, a soft magnetic alloy with a large magnetic flux density B s, resistivity ρ, and magnetic permeability // can be obtained. If h + i + j is outside the above range, it is inferior to Soft magnetic properties

According to the 'in the above composition, if the element M is one or more than one selected from rare earth elements, h,' 'is 50 ShS at at% -8- This paper applies the Chinese national standard (CNS > A4 Specifications (210 * 297 public love) 443040 A7 • B7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. 5. Description of the invention (6) 70, 10Sj Yun 30 is better. (4) The composition formula is given by (C ο 1-. T.) χ μ >. X z 〇- constituted by a microcrystalline soft magnetic alloy, the element T is F e, Ni includes one or both elements, and the element M is Ti, Zr, Ηί V, Nb, Ta, Cr, Mo, Si, P, c, W, B, A1, Ga, Ge and rare earth elements selected from one or more than two elements, X is from Au, Ag, Cu 'Ru, Rh, Os., I r, P t, P d selected one or more elements, the composition ratio c is' OScSO. 7, X, y, z system atomic% , And satisfy the relationship of 3Sy ^ 30, 7SwS40, 20Sy + z + w guest 6 0, the remainder is X. According to the soft magnetic alloy, for the amorphous phase containing a large amount of element M oxide, the element T is mixed to Subjective A crystalline phase, and a microcrystalline phase is more preferably a structure having an oxide containing the element M. (5) The composition formula is represented by C ο Z rb N b: a microcrystalline soft magnetic alloy having an amorphous structure as a main body The composition, a, b, and c are at at%, satisfying the relationship of 78SaS91, 0.5Sb / cS0.8. ^ The saturation magnetic flux density B s depends on the concentration of C 〇, in order to make B s large, it must be 78SaS91 If a > 91, not only the corrosion resistance will be reduced, but it will not easily change into an amorphous structure, and it will start to crystallize, so it is not suitable. Also, when a < 78, the proportion of Co adjacent to each other will be reduced, and the magnetic coupling will be broken. , So * is not easy to show soft magnetic characteristics, so it is not suitable. Permeability; "also depends on Co concentration, in 78 passengers aS9 1 of

This paper size applies to China National Standard (CNS) A4 specification (210 X 297 cm) ITI ------------ install --- (Please read the business matters on the back before this page) Order · -···· 1 443040 Α7 _____ Β7 ___ V. Description of the invention (7) The range is high. (6) The composition formula is Ti. . -" — {Please read the precautions on the back of Jing first, then G page) 'Microcrystalline soft magnetic alloy composed of one or more crystal grains of bcc—Fe' bcc — FeCo'bcc — Co as the main body Composition, the element T contains one or both elements, the element X contains S i, and the element A contains one or both elements. The element M is from Ti, Zr, Hf, V'Nb. 'Ta, Mo, W selected one or more elements' The element Z is C, N contains one or two elements 'Q is from Cr, Re' Ru, Rh 'Ni' Pd, P One or more elements selected by t, Au, d, e, f, and g are at at%. It can satisfy the relationship of ′ lSe, 〇, and OSgSlO. If d, e, f, g are within the above range, a soft magnetic alloy with a large permeability β, a low coercive force H c, and a small magnetic strain constant λ can be obtained. (7) The composition formula is provided by the Intellectual Property Office of the Ministry of Economic Affairs. Τ 1 〇〇 q printed by the consumer cooperatives. — F. KS ip A 1 ,, Μ * ζ ί Q w According to bcc — Fe 'bcc — FeCo, one or more crystals of bcc_Co The element M is composed of a microcrystalline soft magnetic alloy with grains as the main element. One or more elements selected from Ti, Zi ·, Hf'V'Nb, Ta, Mo'W, among the elements ZSC'N Contains one or two elements, Q is one or more elements selected from C r 'Re' Ru 'Rh, Ni, Pd, P t, Au, and p, q, e, f, and g are At% 'meet 8'P ^ 15 This paper size applies the Chinese National Standard (CNS) A4 specification (210x297 mm) -10- Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economy 4 4 3 0 厶 7 Α7 _; _____ Β7 _ ^ ___ V. Description of the invention (8) • 0 ^ q ^ 1 〇 · I ^ e ^ l0>; 0.5 ^ f ^ l5 > 0 The relationship between each gSl0. If P, Q, e, f are within the above range A soft magnetic alloy having a large magnetic permeability y, a low coercive force H c., And a low magnetic strain constant is obtained. [Embodiment of the invention] The magnetic impedance effect used in the embodiment of the present invention is described below. For the wire When a soft high-frequency material such as a ribbon or ribbon is energized with a small high-frequency current, an output voltage due to impedance will occur across the soft magnetic material. The so-called magnetic impedance effect is a soft magnetic material with a small high-frequency current. When an external magnetic field is applied, the impedance of the soft magnetic material changes sensitively, and the output voltage across the soft magnetic material changes. Because of the change in the soft magnetic material applied by the external magnetic field, when an alternating current is applied to the magnetic material, The "skin effect" of the alternating current that will flow on its surface is known to be changed by an external magnetic field. Specifically, the required magnetic field impedance effect is based on a closed circuit as shown in FIG. 6. For a film-shaped, linear, or ribbon-shaped magnetic body M i, an AC current I ac in a frequency band of M Η z is applied from a power source E ac. In this state, when an external magnetic field H e X is applied to the length of the magnetic body M ί, an output voltage Emi due to the inherent impedance of the material occurs at both ends of the magnetic body Mi, and the amplitude of the output voltage Em i corresponds to the external magnetic field. H ex intensity changes within a range of 10%, that is, a phenomenon in which impedance changes occur. The component with this magnetic impedance effect is because it is located in the outer periphery direction of the component ---------- I --- install --- (please read the note $ on the back before ^^ this page) 〇 · & '--line. This paper size applies to China National Standard (CNS) A4 specifications < 210 X 297 mm) .11. Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and Industrial Cooperatives 443040 A7 _B7__ V. Description of the invention (9 ) Excitation so there is no antimagnetic field 'the length direction of the element of the magnetization vector', that is, the AC current I ac is slightly rotated with respect to the flow direction, which causes the permeability to change abruptly. 1mm magnetic field detection sensitivity is hardly degraded "-Also, the magnetic impedance effect element can obtain the characteristics of a weak magnetic field sensor with a high resolution energy of about 1 50 e, or it may be excited by several MW 数 z or more. Therefore, the high frequency excitation of hundreds of MHz can be used freely as a carrier for amplitude modulation. When used as a magnetic field sensor, it can be easily set to block the frequency above 100 MHz, or change the power consumption to 10 m. Characteristics below W . As soft magnetic materials that can exert magnetic impedance effects, F e -C 〇—S i _ B series, such as (FeeCoai) 7 2. 5 S i 12.5B15 amorphous wire (Maori Jianian Xiongwai "Magnetic "Impedance (MI) devices", Materials of the Magnetic Society of the Institute of Electrical Engineering Vo 1.1, MAG-94, No. 75-84, P27-36, 1994) and so on. The magnetic impedance characteristics of this Fe-Co — S i -B series material are shown in Figure 4: For the applied positive and negative external voltages, the output voltage Em i (mV) of the external magnetic field H e X (0 X) is Taking the external magnetic field He x = 〇 (0 e) as the center, it exhibits a characteristic of a roughly symmetrical shape. The measurement of the magnetic impedance characteristic shown in Fig. 4 is for a linear magnetic field impedance effect element, a driving AC signal with a frequency of 3 MHz is used, and the magnitude of the external magnetic field is between -5 (〇e) ~ 5 (〇e ) Under the condition of changing the range of I --- 11 ----- install i — I! I order *! Line (please read the precautions on the back before l, w page) Sleepy home standard climbing (CNS > A4 cell (210 X 297 male *) • 12- 443040 A7 _________B7____ V. Description of the invention (1〇) Previously, the magnetic impedance effect element was an azimuth sensor that could be used to sense geomagnetism , Or the rotary encoder of the rotation angle sensor of the spindle motor of the hard disk or magnetic disk driving device. The present invention uses a magnetic impedance effect element for the antenna part of a receiving device. The first diagram is A block diagram showing an embodiment of the receiving device of the present invention. The antenna section 11 is composed of a magnetic impedance effect element 1 1 b that grasps a radio wave signal, and drives the magnetic impedance effect element 1 1 b to communicate with each other. The circuit 1 1 a is the rectified driving current signal and the receiving radio wave signal. The rectifier circuit 1 1 c of the joint signal and the frequency identifier 1 1 d that removes the AC signal are driven. The shape of the magnetic impedance effect element 1 1 b is linear or ribbon-shaped. The linear or ribbon-shaped magnetism The impedance effect element can be manufactured by a single roll method, a casting method, a fluid cooling method, or the like. A thin-film magnetic impedance effect element 1 1 b manufactured by a sputtering method or a deposition method can also be used. The impedance effect element 1 1 b has electrodes formed at both ends for connection with the driving current] / la, and is formed so that the direction of the driving current signal flow becomes the axis of difficulty in magnetization. Therefore, the magnetic permeability increases in the direction of driving the AC signal flow. The detection sensitivity of the received radio wave signal will increase. The method of using the flow direction of the AC signal driven by the magnetic impedance effect element 1 1 b as the axis of difficult magnetization has the method of using the magnetic impedance effect element 1 1 b in a magnetic field by sputtering. Method of film formation, or no magnetic field (or small) Read the note on the back

I repeat this page Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed on this paper The standard of the paper is applicable to the Chinese storehouse standard (CNS) A4 (210 X 297 mm) -13- 443040 a7 _______B7___ V. Description of invention (11) After being manufactured by single roll method, casting method, fluid cooling method 'sputtering method' or deposition method, it is placed in a magnetic field under a high temperature atmosphere to perform magnetic field annealing (please read the precautions on the back first, then ^ 3 table Page) Method》 The magnetoresistive effect element 1 1 b 'can be formed in a length of 0.1 to 10 mm and a thickness of 1 to 50. If the length or thickness of the magnetic impedance effect element is different, the magnetic impedance characteristics of the magnetic impedance effect element will also be different, so the sensitivity required by the receiving device 'or using a suitable size of the magnetic impedance element according to the purpose of the receiving device Just fine. The composition 'of the magnetic impedance effect element 1 1 b is, for example, (CoQ.94F 6 .. 6) 72.5312.5815. Fe-Co-S iB-based soft magnetic materials other than this composition, or Co_T-M — χ — 0 system (element T contains one or both elements, and element M is from Ti, Zr., Hf ' V'Bb 'Ta, Cr, Mo, Si, P'C'W'B'A1, Ga' Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs

One or more elements selected by Ge and rare earth elements' X is one or two selected by Au, Ag, Ag, Cu, Ru'.Rh, 0s, Ir, Pt, Pd The above elements) Co-Ta-Hf-based, Fe-M-0-based (M-based Ti, Zr, Hf, V, Nb, Ta, W and one or more selected from rare earth elements) Co_Zr— Nb system 'T—S i — A 1 — Μ — ZZ-Q system (Usu T system contains F e ′

Elements of either or both of Co, the element M is from Ti ’Zi:’

One or more elements selected by Hf, V, Nb, Ta, Mo, and W. The elements Z are C and N. Either or both elements are included in this paper. The Chinese paper standard (CNS > A4) Specifications < 210x297 mm) -14-443040 A7 B7 V. Description of the Invention (12) Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the elements Z are C, N contains either or both elements, Q is From Cr * Re, Ru, Rh, Ni, Pd, Pt, Au (select one or more elements) soft magnetic materials, etc., can also form a magnetic impedance effect element 1 1 b »_ drive circuit 1 1 a is the current and voltage of the driving AC signal to the magnetic impedance effect element 1 1 b, and is, for example, 10 m 4, 2 V. In addition, if the driving circuit 1 1 a is a self-oscillating circuit, the magnetic impedance effect element 1 1 b and the driving circuit 1 1 a can be integrated into one body, so that the instability of the sensitivity of the circuit floating impedance and the like can be prevented. Into. As an example of a self-oscillating driving circuit, a stable Colpim oscillator circuit is shown in FIG. 2. AM broadcasting is a carrier of frequency bands from 500 kHz to 2000 kHz. The amplitude modulation is performed by audio signals such as sound or music. The receiving device of the present invention detects a change in a magnetic field component of a radio wave signal and converts it into an electric signal. A linear or ribbon-shaped magnetic impedance effect element 1 1 b is driven by a driving circuit 1 1 a to generate an AC signal. An output voltage due to the impedance occurs at both ends of the magnetic impedance effect element 1 1 b. The frequency of the driving AC signal is set to 10 times to 20 times the frequency of the carrier of the AM broadcast, and it can be set to 20 MHz in this embodiment. If the receiving device reaches the AM wave signal, the amplitude of the output voltage across the magnetic impedance effect element 1 1 b will change in response to the change in the amplitude of the magnetic component of the wave signal. Figure 3 shows the output power of the magnetic impedance effect element at 1 lb. Please read the note on the back. This page is bound. The paper size is applicable to Chinese national standards (CNS> A4 size (210 X 297 mm) -15- 443 04. 0 A7 B7 V. Description of the invention (13 voltage, changed by the receiving radio wave signal. The carrier wave of AM wave 32 is modulated by the amplitude of the audio signal 31. The amplitude of the output voltage across the magnetic impedance effect element 11b, because It changes according to the amplitude change of the carrier 32, so the output from both ends of the magnetic impedance effect element 1 1 b is composed of a mixed signal of the receiving radio wave signal of the carrier 32 and the driving AC signal 33. The magnetic impedance characteristics of the Fe_Co_S i_B series materials shown in Figure 4 are the characteristics of the output voltage applied to the positive and negative external magnetic fields. The external magnetic field H e X = 〇 has a roughly symmetrical shape around the center = Therefore, the carrier 3 2 is At positive or negative pressure, the amplitude of the output voltage also becomes the same. However, the carrier 32 is rectified during the demodulation phase. When the rectification is performed, the negative part of the carrier 32 is removed or converted to a positive one. With the magnetic impedance effect element 1 1 b, the audio signal will be demodulated correctly even if the positive and negative of the carrier 3 2 are converted without distinction. Please read the notes & Printed by Consumer Cooperatives

When S lib is applied, the output of the curve of the magnetic impedance characteristic shown in the Oe diagram is applied when the transverse magnetic field is near 0 (Oe). By applying a bias voltage like this, the corresponding magnetic impedance effect element will be applied. 1 1 b becomes sensitive at both ends. As shown in the magnetic field bias applied to the magnetic anti-effect element, there is an appropriate number of windings on the magnetic impedance effect element 1. By pressing the B-type material through the coil c, if the anti-effect element is pressed, Field, the 4th axis) is shifted and the magnetic field component changes. For example, the 5th coil C is wound only with F e-C 〇 for magnetic resistance. Variation of the voltage The method of output voltage of broadcasting wave, Example 1 b Current will flow around this paper. The paper size is applicable to China National Standard (CNS) A4 specification (210x297 mm) -16- 443040 A7 B7 Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the employee consumer cooperative. V. Description of the invention (14) Method of biasing the magnetic field. The received signal of the carrier wave 3 2 and the drive AC signal 3 3 from the magnetic impedance effect element 1 1 b are mixed signals. Input to rectifier circuit 1 1 c. This embodiment is a bridge circuit composed of diodes 1 1 e, 1 ie, 1 1 e, 1 1 e to form a rectifier circuit, so the negative part of the mixed signal will be converted to a positive. Rectifier circuit .1 1 c is not limited to a diode bridge circuit, any circuit can be used as long as it has a rectifying function. For example, one diode can be connected as a magnetic impedance effect element 1 1 b and a frequency identifier 1 1 d. The mixed signal of the receiving radio wave signal of the carrier 3 2 and the driving AC signal 33 is rectified and input to the frequency identifier 1 1 d, and the driving AC signal 3 3 is removed. The frequency of the driving AC signal, if When it is set to be higher than the frequency of the received radio wave signal, the frequency identifier 1 1 d is composed of a 迤 -pass filter. Conversely, if the frequency of the drive AC signal is set to be lower than the frequency of the received radio wave signal The frequency identifier 1 1 d is composed of a high-pass filter. However, the frequency of the driving AC signal is higher than the carrier wave of the receiving radio wave signal. ≫ The magnetic impedance effect element 11b is if the driving AC signal is not high Frequency, not It will show the effect of magnetic impedance. Although the frequency of driving the AC signal needs to be at least several hundred kHz, if the frequency of the driving AC signal is close to the carrier frequency of the receiving radio wave signal, it will be at the frequency identifier 1 1 d. The mixed signal of the radio wave signal and the driving AC signal will become difficult to remove. Driving the AC signal will be difficult. Please read the note of r first. The size of the paper is bound to the Chinese national standard (CNS > A4 specification (210 X 297 mm) -17 -443040 A7 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs _B7 ____ V. Description of the invention (15) The frequency of medium wave broadcasting, although it is located in a higher frequency band of 500k Hz, but if you want to drive the AC signal more than This is a low-frequency difference between the driving AC signal and the receiving radio wave signal, which is only a few hundred kHz. It is difficult to use a high-pass filter to remove the driving AC signal. On the other side, ‘the part that will drive the AC signal at a higher frequency than the frequency of the carrier wave of the receiving radio signal’ is the allowable range of the low-pass filter required to drive the AC signal can be made higher. Practically, the frequency of driving the AC signal can be dozens of times of the frequency of receiving the radio wave signal. In this embodiment, the frequency identifier 1 1 d is constituted by a low-pass filter composed of a capacitor 1 1 ί and a resistor 1 1 g. The capacitor 1 1 f is used to remove the DC signal mixed with the mixed signal of the receiving radio wave signal and the driving AC signal. The frequency identifier is not limited to the one shown in this embodiment, and any device may be used as long as it can remove the driving AC signal. For example, an alternative high-pass filter can also be used. A low-pass filter can only pass a band-pass filter of the carrier wave of the received signal, or a band-stop furnace wave filter that does not allow the AC signal to pass ( band eliminator filter). Alternatively, a filter composed of a capacitor or a resistor may be applied with a bias voltage. Applying a bias voltage will increase the sensitivity when the drive AC signal is removed. From the mixed signal of the receiving radio wave signal of the carrier 32 and the driving AC signal 33, after removing the driving AC signal 3 3, the received receiving wave signal is amplified by the high-frequency amplification circuit 12. However, the antenna section 11 does not have the function of selecting the carrier frequency of the received radio wave signal. That is, the input and output of the high-frequency amplifier circuit 12 (Please read the precautions on the back before {3 pages). Packing: Order-Line 0 This paper size applies to China National Standard (CNS) A4 specifications < 210x297 male (Centi) -18- A7 B7 443040 V. Description of the invention (16) is a radio wave signal of all frequencies that are received. The tuning circuit 13 provided in the latter stage selects the signal of the target frequency from the output of the high-frequency amplifier circuit 12, and the detection circuit 14 extracts the audio signal from the mixed signal of the audio signal and the carrier wave. The tuning circuit 13 and the detection circuit 14 are constructed using circuits used in general AM broadcasting. For example, the resonance circuit of the coil and the capacitor or the band-pass filter are tuned * The carrier signal is removed by the low-pass filter or the like to obtain the frequency signal. The extracted audio signal is amplified by the low-frequency amplifier circuit 15 as required, and can be heard by the speaker 16 as sound or music. [Effects of the Invention] According to the receiving device of the present invention described in detail, the antenna portion is formed instead of a winding coil using a conventional ferrite magnet core. By using a magnetic impedance effect element, it can be significantly reduced in size. . In addition, the direction of the flow of the AC signal driving the magnetic impedance effect element becomes the axis of difficult magnetization, and the biasing magnetic field can be used to increase the reception sensitivity of the receiving device by applying a bias magnetic field in the direction of driving the AC signal. Brief Description of the Drawings Figure 1 is a block diagram showing an embodiment of the receiving device of the present invention. 0 Figure 2 is a circuit diagram showing an example of the driving circuit of the present invention. Figure 3 shows the power output of the magnetic impedance effect element of the receiving device-ίιι — lm — — — — — I — ^ illln! ^. ≪ Please read the note on the back first and then the title page ) Printed by the Consumer Goods Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs, the paper size is applicable due to national standards (CNS > A4 specifications (210 * 297 public * > • 19- 443040 A7 B7) V. Description of the invention (17) Graph of changes in telecommunication signal

Figure 4 shows F

Co

Graph of the magnetic impedance characteristics of the S B series magnetic impedance effect element. Fig. 5 is a conceptual diagram showing a method of applying a bias magnetic field to a magnetic impedance effect element. Figure 6 is a schematic diagram showing a method of applying a driving AC signal to a magnetic impedance effect element | applying an external magnetic field. FIG. 7 is a block diagram showing a conventional receiving device. Read the precautionary page on the back. [Equal description printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, printed by the employee consumer cooperative. 1 b 1 c Id 2 3 4 5 6 Antenna drive circuit Magnetic impedance effect element Rectifier circuit Frequency identifier High frequency amplifier circuit Tuning circuit Detector circuit Low-frequency amplifier circuit Speaker book size Applicable to Chinese National Standard (CNS) A4 specification (210 x 297 mm) -20-

Claims (1)

443040 Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs A8 B8 C8 D8 VI. Patent Application Fan Garden 1. A receiving device, which has; a tuning circuit, and a detection circuit, which are characterized by having; the antenna portion is provided with ; A magnetic impedance effect element, a driving current for driving the AC signal to the magnetic impedance effect element, and a rectifying circuit for rectifying a mixed signal from the receiving radio wave signal and the driving AC signal given by the driving circuit, and from the above The mixed signal separates the frequency identifier of the received radio wave signal. > • 2. The receiving device according to item 1 of the patent application range, wherein the magnetic impedance effect element has electrodes connected to the driving circuit formed at both ends, and the direction in which the AC signal is driven is to become a difficult axis for magnetization. 3. If the receiving device of the first or second item of the patent application scope, wherein the magnetic impedance effect element is the driving AC signal described above, a bias magnetic field is applied to the flow direction. 4. The receiving device according to item 1 or item 2 of the scope of patent application, wherein the magnetic impedance effect element is formed in a ribbon shape or a line shape. 5. If the receiving device of the scope of patent application item 1 or item 2, wherein the frequency of the above-mentioned driving AC signal is higher than the frequency of the receiving radio wave signal carrier _ 6. If the scope of patent application is item 1 or 2 The receiving device of item, wherein the magnetic impedance effect element is composed of an amorphous type represented by (F e 1-η C 〇) 1 〇〇- X-y (S i 1-i! Β ι >) xMy Made of high quality soft magnetic alloy, M series contains either one of C r, Ru, or both elements, which represents the composition ratio a, b is 〇5Sa SO. 1, 0.2 helmet. 8, x , Y is the relationship of 10 xS3 5 and OSy 彡 7 with at%. Please note on the back of the first I. The binding paper private paper size is applicable to Chinese standard (CNS) A4 size (210X297 mm) _ 21 4 4 3 0 4 0 as BS C8 _______ D8______ 6. Application for patent scope 7. The receiving device of the scope of application for the item 1 or item 2, wherein the magnetic impedance effect element is an amorphous soft magnetic alloy whose composition formula is represented by c 0 1 T am H f 11 and the amorphous structure is the main body So M becomes 1, η, η can be satisfied in at%. 7 0 S 1 '$ 9 0' 5 S m '2 1, 6-6 Yun 11315, 1 $ 111/11 $ 2.5 relationship. 8 · If applying for a patent The receiving device of the first or second range of the device, wherein the above-mentioned magnetic impedance effect element is composed of a microcrystalline soft magnetic alloy with an amorphous structure as the main body represented by Feh M 1 0 j. M is one or more elements selected from Ti, Zr, Hf, V, Nb, Ta'W quality rare earth elements. 'H'i'j can satisfy 45Sh at 70%, helmet 30 '10 customers j each 40, h + i + j = 100. 9. Such as the receiving device of the scope of patent application for item 1 or 2' of the above The magnetic impedance effect element is composed of a microcrystalline soft magnetic alloy represented by (C 〇! T T,) X Μ X ζ Ο w, and the element T is F e 'N i. Element, the element M is one or two selected from Ti'Zr'Hf, V, Nb'Ta'I Cr, Mo, Si'P ^ C'W'B'Al'Ga'Ge and rare earth elements More than one element, X is one or more elements selected from Au'Ag'Cu'Ru'Rh'Os' I r 'Pt' pd, the composition ratio is c system cK) · 7, .y , Z, w are atomic%, satisfying the relationship of 30-0 ^ z ^ 20 * 7 ^ w ^ 40 f 20 ^ y + z + w Yun 60, and the remainder is x. Please read the note I on the back page of the gutter. The paper size printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs is printed on the paper standard (CNS) A4 (210X297 mm) -22- 443 040 Yi C8 D8 __ VI. Patent application scope 10. If the receiving device of the patent application scope item 1 or item 2 ', wherein the above magnetic impedance effect element is composed of an amorphous structure represented by 〇azrh N b The magnetic alloy composition 'a, b, c can satisfy 78SaS91' 〇-bSb / cS0.8 at at%. 1 1. If the receiving device of the first or second item of the scope of the patent application is the "receiving device", where the above-mentioned magnetic impedance effect element is composed of the following formula, please read the precautions before T XdMeZfQs, which will be represented by bcc_Fe, bcc — Fe. Co, bcc — Co-printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs or two or more kinds of crystals as the main body. The element T contains Fe, and Co contains X. Si contains either Si or A1. Ti, Zr, Hf, V, Nt> one or more elements, elements or both elements, element Q is selected from CrNi, Pd, Pt, Au d, e, f, g system S0,0.'5'fS15,0 can be filled at at%; L 2. As in the first patent application scope, wherein the above magnetic impedance effect element is composed of a group of microcrystalline soft magnetic alloys-square or rain, The elements of the two elements, the element M is a package, Ta, Mo, and W are selected. The Z system contains any one of C and N, Re, Ru, Rh * 1 or more elements, which is sufficient. Sdg25, The relationship between lSe S g S 1 0. The receiving device of item 2 or item 2 has the formula T 1 ο 〇bcc ί-* sip A 1 q M e Z f Q «Indicated by Fe, bcc — FeCo, bcc — Co 1 or A microcrystalline soft magnetic alloy composed of two or more kinds of crystals as the main body. The element T is composed of one or both of F e and C 0. The paper size of the element is applicable to the Chinese standard (CNS > A4). (210X297 mm) _ 23. AO 443040 § D8 VI. The scope of patent application M is one or more than one element selected from T i, Z r, H f, V, N b, Ta, W. The element Z is one or both of C and N, and the element Q is one or more elements selected from C r, Re, Ru, Rh 'Ni, Pd, P t, Au, and P , Q, e, f, g at 8% can satisfy 8SpS15, OSp ^ l0. I ^ e ^ lO > 〇.5 ^ f ^ ll5 -〇ig ^ 1 0. Please read the note of the back first Matter re-Y binding line _ Printed by the Consumers' Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Paper Size Quick-Release Zhonggu Yinjiazheng Standard (CNS) A4 Specification (210X297 mm) -24-