Abstract: A compact multilayer band-pass filter using an interdigital capacitor which can be integrated into a compact form in a relatively low frequency band. The band-pass filter filters only a signal of a predetermined frequency band from a signal applied through an input terminal, and outputs a filtered signal to an output terminal. The band-pass filter includes at least one pair of transmission lines, respectively formed between the input terminal and the output terminal provided on an uppermost layer, for generating an inductor component, a capacitance compensation unit, with the interdigital capacitor having a plurality of layers, for loading a specified capacitance to one end of the transmission line, and a ground layer coupled to a specified layer of the capacitance compensation unit and the other end of the transmission line and formed on a lowermost layer.

Abstract: An electrical filter assembly including a housing; at least one electrical wire extending into the housing; and a filter subassembly on the housing, the filter subassembly comprising a lead frame and a filter circuit connected to the lead frame. The filter circuit has a plurality of capacitors attached to the lead frame as a modular block. The lead frame comprises at least one insulation displacement contact section which makes electrical connection with the at least one electrical wire.

Abstract: An objective is to provide a multilayer filter capable of preventing an electric current rapidly flowing by virtue of varistor effect, from passing as noise, upon application of noise of a high voltage over a varistor voltage to its input. A multilayer filter has an inductor part 10 and a varistor part 20 in a laminate 2, and the inductor part 10 has the DC resistance of 4 ?-100 ?. This prevents an electric current rapidly flowing by virtue of the varistor effect, from passing as noise, upon application of noise of a high voltage over the varistor voltage to the input.

Abstract: Disclosed herein is a laminated filter with improved stop band attenuation, which is adopted in devices using a radio frequency, such as communication systems and/or broadcasting systems. The laminated filter forms cross capacitive coupling as feeding lines of input lead and/or output lead are coupled to a resonator pattern, and enhances an attenuation characteristic of stop band. Also, the laminated filter is minimized if feeding lines of the input lead and output lead are aligned in different layers, and the positions of the attenuation poles are easily controlled by adjusting the feeding line length.

Abstract: A filter element includes a coil part formed in an overall tube-like shape by layering a signal transmitting belt-like conductor and a grounding belt-like conductor with a belt-like insulator in between and winding so that the grounding belt-like conductor is outside the signal transmitting belt-like conductor, a magnetic body being attached to a center of the coil part; an input terminal that is connected to an outermost circumferential part of the signal transmitting belt-like conductor and is led from an outer circumferential position of the coil part; an output terminal that is connected to an innermost circumferential part of the signal transmitting belt-like conductor and is led from a central position of the coil part located on an opposite side to a leading position of the input terminal with the magnetic body in between; and a grounding terminal that is connected to an outermost circumferential part of the grounding belt-like conductor and is led from an outer circumferential position of the coil par

Abstract: A passive device and a module for a transceiver are provided. The passive device for a transceiver includes a semiconductor substrate or a dielectric substrate, at least one capacitor, a dielectric layer, at least one inductor, a via hole, a metal electrode, radio frequency signal lines, and a radio frequency ground. The at least one capacitor is formed on the substrate. The dielectric layer is formed on the capacitor and the substrate. The at least one inductor is formed on the dielectric layer. The via hole penetrates through the dielectric layer. The metal electrode is formed in the via hole and electrically connects the capacitor and the inductor. The radio frequency signal lines are for the inductor and the capacitor. The radio frequency ground is formed on the substrate and isolated from the radio frequency signal lines. A reduction in the area required for mounting passive devices and modules thereof contributes to the downsizing of communication systems.

Abstract: A noise filter in which the resonance of noise can be prevented, which is small in size and inexpensive, and is useful especially in an electronic device of which the signal frequency exceeds 100 MHz. In the noise filter, ground conductors are arranged on the outermost layers of a laminate formed by lamination of magnetic sheets and firing thereof. Transmission lines and ground conductors are alternately arranged with the magnetic sheets being sandwiched between them, respectively. Signal electrodes connected to the transmission lines and ground electrodes connected to the ground conductors are formed on the outer surface of the laminate. Thus, a signal is transmitted through the transmission lines while the ground conductors are grounded, and therefore, high frequency noise can be attenuated by utilization of heat loss caused by the magnetic sheets.

Abstract: An energy conditioning structure comprised of any combination of multilayer or monolithic energy conditioners with operable conductors, all selectively arranged and shielded for attachment to at least a conductive substrate.

Abstract: A transmission line type noise filter, which is connectable between a direct current power supply and an electrical load component to pass a coming DC current while attenuating a coming AC current, includes a first conductor, a dielectric layer, a second conductor as a cathode, a first anode (12), and a second anode. The first and the second conductors and the dielectric layer serve as a capacitance forming portion. The thickness of the first conductor is selected to substantially restrict temperature elevation of the first conductor, which is caused by DC direct current flowing in the first conductor.

Abstract: A microminiature power converter includes a semiconductor substrate on which a semiconductor integrated circuit is formed, a thin film magnetic induction element, and a capacitor. The thin film magnetic induction element includes a magnetic insulating substrate, and a solenoid coil conductor in which a first conductor is formed on a first principal plane of the magnetic insulating substrate, a second conductor is formed on a second principal plane of the magnetic insulating substrate, and a connection conductor is formed in a through hole passing through the magnetic insulating substrate are connected. A relationship of a length L of the magnetic insulating substrate in a direction vertical to a magnetic field generated by the solenoid coil and a length d of the coil conductor is d?L/2.

Abstract: A noise filter (1) has a first impedance element (2) having an impedance value Z1, a second impedance element (3) having an impedance value Z2, a third impedance element (4) having an impedance value Z3, a first anode terminal (5), a second anode terminal (6), and a cathode terminal (7). Z1<Z2 and Z1<Z3 are satisfied. Both ends of a central conductor (2a) of the first impedance element (2) are connected to a first node (8) and a second node (9), respectively. Both ends of the second impedance element (3) are connected to the first node (8) and the first anode terminal (5), respectively. Both ends of the third impedance element (4) are connected to the second anode terminal (6) and the second node (9), respectively. The central conductor (2a) and a cathode conductor (2b) of the first impedance element (2) form a transmission line structure having the impedance value Z1. The cathode conductor (2b) is connected to the cathode terminal (7).

Abstract: A transmission line capacitor includes at least two side-by-side capacitor portions spaced apart between a separating portion all contained in a single monolithic body. Such transmission line capacitors provide specific capacitor functionality for parallel transmission lines in a printed circuit board environment, while also maintaining a desired impedance value between the transmission paths. The transmission line capacitors offer both biasing functionality for blocking undesired DC voltages as well as AC coupling functionality for passing AC voltage signals with preserved data integrity. A first embodiment may be formed with a dielectric material having a relatively low dielectric constant, allowing high capacitor “height” with fixed spacing between distinct capacitive structures. Another embodiment may be formed with a relative high K dielectric and then slotted with an air gap between capacitive structures.

Abstract: A noise filter includes four magnetic layers including upper and lower magnetic layers and intermediate magnetic layers which are laminated to define a laminated unit. Two signal lines are disposed side by side between the intermediate magnetic layers, and two ground electrodes sandwich the intermediate magnetic layers therebetween so as to form a transmission line. A dielectric member is disposed between the two signal lines. With this configuration, a common-mode signal is attenuated by utilizing magnetic loss in the magnetic layers. In contrast, by providing the dielectric member, a normal-mode signal is allowed to propagate by reducing the effective relative magnetic permeability while preventing the occurrence of blunt waves.

Abstract: An inductor element 30 effectively functions even when formed on a substrate and comprises two upper and lower conductors 1, 2 spirally formed on the front side of a semiconductor substrate 3. The conductors 1, 2 have substantially the same shape. When viewed from the above of the front side of the substrate 3, the two conductors 1, 2 are superposed one on the other almost exactly. Lead wires 6a, 6b are connected to the outer end (outer peripheral end) and the inner end (center end) of the conductor 1, respectively. The outer end of the conductor 1 is connected to the inner end of the conductor 2 through a connection wire 6c. The conductor 1 functions as an inductor conductor and is connected to a circuit provided on the semiconductor substrate 3 through the lead wires 6a, 6b.

Abstract: A transmission line type noise filter includes a metal fine wire (1) made of valve-operational metal and serving as a central conductor, a capacitance forming portion (3) formed over a predetermined length on the periphery of the metal fine wire, and a conductor layer (2) formed on the surface of the capacitance forming portion and serving as an external conductor. The capacitance forming portion (3) includes a sintered body (11) formed on the metal fine wire and made of the foregoing valve-operational metal, a dielectric film (31) formed on the surface of the sintered body and serving as a dielectric, and a solid electrolyte layer (23) formed on the surface of the dielectric film.

Abstract: A feed-through filter capacitor assembly using an electrically conductive adhesive modified with a filler of low coefficient of thermal expansion (CTE) to provide a conductive relation between the conductive pin and the electrode plates of the ceramic capacitor. The conductive adhesive contains an organic polymer-based adhesive component that has a CTE greater than the CTE of the capacitor ceramic body and a conductive metal filler having a CTE lower than the adhesive component. The conductive adhesive is further provided with a CTE-lowering filler that has a CTE lower than the CTE of the conductive metal filler, thereby lowering the overall CTE of the adhesive to a value closer to the CTE of the capacitor ceramic body.

Abstract: A monolithic LC filter which provides increased magnetic field coupling as compared with a conventional monolithic LC filter, without an increase in component size of the filter. The monolithic LC filter includes first and second resonator inductors coupled together by magnetic field coupling. The inductors include parallel-extending straight coupling sections formed by conductive lines which extend in parallel generally along a diagonal of a supporting dielectric layer. This configuration enables the lengths of the coupling sections to be increased as compared with the lengths of the corresponding coupling sections of a conventional monolithic LC filter.

Abstract: A non-inverting-side first switch is formed in a first area on one of sides of a differential amplifier, meanwhile a non-inverting-side second switch is formed in a second area on the other of sides of the differential amplifier, the non-inverting switches being for resetting a non-inverting input terminal of the differential amplifier. Similarly, An inverting-side first switch is formed in the first area, meanwhile an inverting-side second switch is formed in the second area, the inverting switches being for resetting a non-inverting input terminal of the differential amplifier. Further, a non-inverting-side line connecting the non-inverting-side first switch and the non-inverting input terminal, and an inverting-side line connecting the inverting-side first switch and the inverting-side second switch are provided next to each other. A signal line crossing one of the lines is provided so as to cross the other of the lines.

Abstract: A noise filter includes a plurality of magnetic sheets stacked one on another. The magnetic sheets are baked to form a layered product. A transmission line is arranged between the second and third magnetic sheets. The transmission line extends linearly in the longitudinal direction of the layered product. Two ground conductors have the second and third magnetic sheets therebetween. Signal electrodes connected to both ends of the transmission line are arranged adjacent to both ends, in the longitudinal direction, of the layered product. Grounding electrodes connected to the ground conductors are arranged in the middle positions, in the longitudinal direction, of the layered product. With the ground conductors being grounded, a signal passes through the transmission line, thus attenuating high-frequency noise using heat dissipation by the four magnetic sheets.

Abstract: A multilayer LC composite component includes a coil unit including a stack of coil conductors, two adjacent coil conductors being separated by an insulating layer (dielectric layer) and being electrically connected to each other and a capacitor unit including a ground-side capacitor electrode and a signal-side capacitor electrode which oppose each other with an insulating layer disposed therebetween, the ground-side capacitor electrode having an electrode-free area at a central region thereof and the signal-side capacitor electrode being electrically connected to the coil unit via the electrode-free area. The ground-side capacitor electrode extends to at least two opposing sides of the insulating layer (dielectric layer) and has a cut portion (cross-shaped cut portion) which extends continuously from the electrode-free area.

Abstract: An LC noise filter includes a capacitor unit having a plurality of capacitor electrode patterns and a plurality of insulating layers that are stacked and integrated, and an inductor unit in which a plurality of coil conductor patterns and a plurality of insulating layers are stacked and integrated. In the LC noise filter, the inductor unit and the capacitor unit are stacked, and a cutoff frequency is adjusted in accordance with the distance in the stacked direction between the coil conductor pattern and the capacitor electrode pattern being next to each other in the stacked direction.

Abstract: To provide a circuit arrangement for filtering and/or selecting single frequencies or frequency ranges, particularly of signals intended for at least an integrated circuit and/or signals generated by at least an integrated circuit, said circuit arrangement (100) comprising at least two electric resonant circuits (10; 20; 30) with at least an inductive element (12; 22; 32) and at least a capacitive element (14; 24; 34), which, at a given low power supply voltage, provides a dynamic range complying with the current requirements, on the one hand, and has a maximal quality factor (Q), on the other hand, and can be realized in an inherently symmetrical arrangement and combined with a differential or balanced circuit technique to be preferred in integrated techniques, it is proposed that the resonant circuits (10; 20; 30), particularly the inductive elements (12; 22; 32) are magnetically fixedly coupled to each other, and in that at least a part, preferably all resonant circuits (10; 20; 30) of the circuit arran

Abstract: A distributive capacitor 205 and impedance matching network 201 and transmitter 101 that use the capacitor and are suitable for high density integration applications include a printed circuit substrate 303 comprising one of a printed circuit board and a silicon based substrate, a first conductive layer 305 disposed on the printed circuit substrate, a layer of dielectric material 307 disposed on the first conductive layer and having a thickness, the dielectric material having a dielectric constant more than five times greater than the dielectric constant of the printed circuit substrate; and a second conductive layer 309 disposed on the layer of dielectric material and having a second length 311 and a second width 603 that are selected so that the distributive capacitor operates as a transmission line.

Abstract: An electric filter having means for buffering high-frequency interference in a high-current environment, comprising a feed-through conductor, a derivation conductor, and one or more capacitors. The one or more capacitors are switched between the feed-through conductor and the derivation conductor. The feed-through conductor is directed around the capacitor. A motor vehicle wiring system can be equipped with such a filter.

Abstract: Using plural layers selected from among composite resin substrates having a fully high or low dielectric constant, composite resin substrates having a fully high magnetic permeability, and composite resin substrate layers having a fully high Q value, the invention provides a multilayer electronic part of small size having high performance and improved overall electrical characteristics. The multilayer electronic part includes constituent layers of at least two types formed of composite materials and a conductor layer formed on at least one composite material layer, wherein the conductor layer constructs a predetermined electric circuit.

Abstract: An electrical connector having electrical conductors in a plurality of rows is provided, wherein each of the plurality of rows includes a housing and a plurality of electrical conductors. Each electrical conductor has a first contact end connectable to a printed circuit board, a second contact end and an intermediate portion therebetween that is disposed within the housing. The housing includes a first region surrounding each of the plurality of electrical conductors, the first region made of insulative material and extending substantially along the length of the intermediate portion of the electrical conductors. The housing also includes a second region adjacent the first region and extending substantially along the length of the intermediate portion of the electrical conductors. The second region is made of a material with a binder containing conductive fillers.

Abstract: A non-inverting-side first switch is formed in a first area on one of sides of a differential amplifier, meanwhile a non-inverting-side second switch is formed in a second area on the other of sides of the differential amplifier, the non-inverting switches being for resetting a non-inverting input terminal of the differential amplifier. Similarly, An inverting-side first switch is formed in the first area, meanwhile an inverting-side second switch is formed in the second area, the inverting switches being for resetting a non-inverting input terminal of the differential amplifier. Further, a non-inverting-side line connecting the non-inverting-side first switch and the non-inverting input terminal, and an inverting-side line connecting the inverting-side first switch and the inverting-side second switch are provided next to each other. A signal line crossing one of the lines is provided so as to cross the other of the lines.

Abstract: An LC oscillator capable of oscillating even if it is fabricated on a substrate comprises a transistor, capacitor, and an inductor element 30. The inductor element 30 has two spiral conductors 120, 122 having substantially the same shape and formed on a semiconductor substrate 110. The inner end of the conductor 120 is electrically connected to the outer end of the conductor 122. Lead wires 130, 132 are connected to the outer and inner ends of the conductor 120 respectively. The lead wire 132 is passed through the lower conductor 122 and the semiconductor substrate 110 and led outside. The upper A conductor 120 serves as an inductor conductor and is connected to another component of the LC oscillator formed on the semiconductor substrate 110 through the lead wires 130, 132.

Abstract: In order to accommodate increasing operation speed of a digital circuit, a distributed constant type noise filter having a low impedance transmission line optimal to provide a power de-coupling of an LSI operating at high speed is provided. Particularly, a capacitor-forming portion of the distributed constant type noise filter is constructed with a solid electrolytic capacitor having a 3-terminal structure. In the distributed constant type noise filter constructed as mentioned, a ratio of width W of the capacitor-forming portion to thickness d of a dielectric member thereof and length L of the capacitor-forming portion are set on the basis of dielectric constant of the capacitor-forming portion such that electric noise generated by an electron device connected thereto are removed over a wide frequency range thereof.

Abstract: In a superheterodyne receiver, energy can bypass a filter by magnetically coupling to a metallic radio frequency shield. This is especially a problem with small form factor devices in which the metallic radio frequency shield is positioned close to the filter. By using a ferrite-embedded element positioned between the filter and the RF shield, some of the undesired harmonics produced by the mixer can be dissipated into heat.

Abstract: A singular or multiple paired, filter capacitor assembly that is comprised of either multilayer or monolithic capacitors and includes selective and arranged attachment to at least a conductive substrate, with operable conductors. This assembly can also include coupled to sets of interleaved-type or monolithic-type ground and active electrodes all arranged in a pre-selected manner for electrical connection into various types of electrical devices.

Abstract: The present invention provides a foil wound low profile power L-C processor. A magnetic winding is disposed within a core. The magnetic winding can be made of one or more sets of conductive foil and insulation film wound together in a spiral pattern. The magnetic winding can also include dielectric film. The magnetic winding can have a center aperture in which a non-magnetic and non-conductive center post can be disposed. The center post can also be divided into portions with a combined length less than the length of the center aperture to form an air gap within the center aperture.

Abstract: A passive low pass, &pgr;-type filter of a surface mounted device configuration has two stack capacitors disposed radially inwardly of a coil, otherwise known as an inductor. Each capacitor has a number of ground plates successively stacked between a number of signal plates. The ground plates electrically engage a front and rear ground band which circles the external surface of a non-conductive encapsulant of the filter. A forward and rearward conductive member or sheet engages each end of the encapsulant. One end of the coil is engaged to the front sheet and the opposite end is engaged to the rear sheet. The signal plates of the forward capacitor are engaged to the front sheet and the signal plates of the rearward capacitor are engaged electrically to the rear sheet.

Abstract: An electrical noise-filtering assembly includes first and second busbars. The first busbar is spaced from the second busbar at a fixed distance sufficient to induce the proximity effect. As arranged, high frequency noise having high order harmonics adhere to the surfaces spaced by the fixed distance. Noise can be removed efficiently by disposing low equivalent series resistance (ESR) noise filters between the surfaces where the noise harmonics concentrate.

Abstract: A laminated LC component has no directivity in terms of mounting and characteristics. A first set of coil conductors are electrically connected in series so as to define a first helical coil. A second set of coil conductors are also electrically connected in series so as to define a second helical coil. Capacitor electrodes are disposed such that they face each other with an insulating sheet disposed between the capacitor electrodes thereby forming a capacitor. The capacitor electrode at the ground side has a substantially cross shape and four ends of the substantially cross-shaped capacitor electrode are exposed at four respective sides of the insulating sheet. The insulating sheets are stacked on one another and fired so as to define a single unitary laminated block.

Abstract: A singular or multiple paired, filter capacitor assembly that is comprised of either multilayer or monolithic capacitors and includes selective and arranged attachment to at least a conductive substrate, with operable conductors. This assembly can also include coupled to sets of interleaved-type or monolithic-type ground and active electrodes all arranged in a pre-selected manner for electrical connection into various types of electrical devices.

Abstract: A suspended printed inductor (SPI) connected in parallel to a suspended interdigital capacitor (SIC) so as to form a parallel resonant circuit that is nearly independent of variations in PCB etching tolerances. This combination of SPI and SIC functions to resonate at a center frequency and with similar parallel resonant circuits can be used to form RF filters having any desired order. Using the parallel resonant combination of SPI and SIC, a RF filter can be constructed whose electrical properties are nearly insensitive to variations in PCB parameters and etch processing. The sensitivity of the spiral suspended printed inductor in combination with the suspended printed interdigital capacitor to PCB parameters such as dielectric constant and PCB height is greatly reduced. Further, the parallel combination of suspended printed spiral inductor and suspended interdigital capacitor is nearly insensitive to PCB etching tolerances. SPIs and SICs are characterized by the absence of a ground plane.

Abstract: An electromagnetic resonator and a frequency filter. The resonator is composed of an electromagnetic waveguiding structure which is twisted along its axis while being bent back and the two ends connected smoothly to provide a smooth path to the electromagnetic wave, the twist providing additional phase shift to facilitate a resonant condition in a smaller volume. The filter includes one or more coupled resonators which are coupled in a controlled fashion to an external circuit to realize a desired frequency selectivity.

Abstract: An LC resonator includes insulation sheets and inductor patterns that are electrically connected through long via-holes provided in insulation sheets, so that tubular structures each having an insulator material disposed therein and having a substantially rectangular cross section are produced. The tubular structures are laminated through sheets to define an inductor having a double structure. A capacitor pattern is opposed to the open ends of the inductor patterns, respectively, to produce a capacitor. That is, the capacitor pattern is arranged between the tubular structures. The capacitor and the inductor having the double structure define an LC parallel resonance circuit.

Abstract: A laminated LC filter has an excellent Q characteristic and includes at least three LC resonators. Each of the LC resonators includes an inductor pattern and a capacitor pattern. The pattern widths of the inductor patterns of the LC resonator located at the approximate center portion are wider than the pattern widths of the inductor patterns of the LC resonators located at both ends.

Abstract: A stacked LC filter includes a layered body defined by a plurality of insulating layers, a plurality of inductor patterns, and a plurality of capacitor patterns in a stacked arrangement At least three LC resonators are disposed in the layered body including a plurality of inductors, which are defined by the inductor patterns, and a plurality of capacitors, which are defined by the capacitor patterns disposed so as to face the inductor patterns. At least two coupling capacitor patterns are stacked in the layered body and are arranged to couple the LC resonators. A pole adjusting pattern is stacked in the layered body and faces the at least two coupling capacitor patterns.

Abstract: A filter includes a first end, a second end, a conducting casing, at least one central conductor, and connecting devices at each of the ends, the casing extending along an imaginary axis and intended to accommodate the conductor along this imaginary axis. The conductor is provided with capacitance generating portions and inductance generating portions. The connecting device at the first end of the filter includes a first connecting member connected to the casing and a second connecting member connected to the conductor, and the connecting device at the second end of the filter includes a third connecting member connected to the casing and a fourth connecting member connected to the conductor. Both the second and the fourth connecting members are provided integrally with the conductor.

Abstract: Disclosed is an electromagnetic wave shielding apparatus for shielding electromagnetic waves generated from a circuit so as to prevent the electromagnetic waves from being leaked to the outside of the circuit. The apparatus includes a metal member disposed in such a manner as to be opposed to the circuit, and an electromagnetic wave absorbing member disposed on the metal member, wherein the electromagnetic absorbing member is composed of a carbon layer and coil-like carbon fiber structures. The apparatus is allowed to simply obtain an electromagnetic wave absorbing function without increasing the weight of the apparatus.

Abstract: In order to accommodate increasing operation speed of a digital circuit, a distributed constant type noise filter having a low impedance transmission line optimal to provide a power de-coupling of an LSI operating at high speed is provided. Particularly, a capacitor-forming portion of the distributed constant type noise filter is constructed with a solid electrolytic capacitor having a 3-terminal structure. In the distributed constant type noise filter constructed as mentioned, a ratio of width W of the capacitor-forming portion to thickness d of a dielectric member thereof and length L of the capacitor-forming portion are set on the basis of dielectric constant of the capacitor-forming portion such that electric noise generated by an electron device connected thereto are removed over a wide frequency range thereof.

Abstract: An EMI filter (10) that makes use of a ferroelectric-ferromagnetic composite, member, or slab (12) in connection with capacitive and inductive elements. The geometrical structure of the filter (10) is such that the mutually orthogonal electric fields and magnetic fields generated by the capacitive and inductive elements penetrate the volume of the composite (12). In some designs, capacitive plates (14, 18, 32, 34) are split to avoid setting up eddy currents in the plates (14, 18, 32, 34) which oppose the penetration of magnetic flux through the composite (12). Various structural designs can be provided to define the capacitive elements and the inductive elements in different configurations relative to the composite to satisfy the desirable requirements.

Abstract: A method of manufacturing a noise-cut filter having distributed inductances and distributed capacitances is produced wherein conductive spiral coil patterns are formed on the opposite surfaces of a dielectric sheet, such that the spiral coil patterns are aligned with each other in a direction perpendicular to the plane of the dielectric sheet, and a main circuit pattern is constructed by bonding a main circuit conductor to the spiral coil pattern formed on one of the opposite surfaces of the dielectric sheet. The main circuit conductor is formed by stamping with a punch press so that the conductor has a cross sectional area large enough to allow the passage of current of a main circuit, and has substantially the same shape as the spiral coil pattern.

Abstract: A small inductor built-in electronic part whose Q is high is provided. An LC resonator comprises a laminate composed of a number of laminated electronic layers. Capacitor electrodes, common electrodes, and ground electrodes are formed between the dielectric layers. Two via holes are formed penetrating through the plurality of intermediate dielectric layers in the thickness direction thereof leaving a space therebetween. These via holes act as inductor elements.

Abstract: A method for manufacturing an inductor. A silicon substrate of a first conductive type is provided. A spiral conductive layer is formed over the silicon substrate. A doped region of a second conductive type is formed in the substrate below the spiral conductive layer. A doped region of the first conductive type is next formed in the substrate around the doped region of the second conductive type. A reverse-bias voltage is applied to the doped region of the first conductive type and the doped region of the second conductive type. The application of a reverse-bias voltage creates a depletion region beneath the doped region of the second conductive type and the space between the doped regions.

Abstract: A multilayer noise filter includes a damping resistor which is arranged to control the distortion of the waveform of an output signal and eliminate a space required for installation of the damping resistor on a substrate upon which the filter is mounted. The axial direction of coils incorporated in inductor assemblies is substantially perpendicular to external input and output electrodes. One end of one coil is electrically connected to the external input electrode and one end of another coil is electrically connected to the external output electrode. The other ends of the coils are electrically connected to a resistor at different locations, respectively. The resistor connecting the external input and output electrodes is disposed on the top surface of a multilayer unit such that the resistor is substantially parallel to the stacking direction of the multilayer unit and the axial direction of the coils. In a capacitor assembly, a pair of capacitor conductors are arranged to face each other.

Abstract: A noise-cut filter having distributed inductances and distributed capacitances is provided wherein conductive spiral coil patterns are formed on the opposite surfaces of a dielectric sheet, such that the spiral coil patterns are aligned with each other in a direction perpendicular to the plane of the dielectric sheet, and a main circuit pattern is constructed by bonding a main circuit conductor to the spiral coil pattern formed on one of the opposite surfaces of the dielectric sheet. The main circuit conductor is formed by stamping with a punch press so that the conductor has a cross sectional area large enough to allow the passage of current of a main circuit, and has substantially the same shape as the spiral coil pattern.