67results about How to "Raise the self-resonant frequency" patented technology

A method and apparatus for fully integrating a Voltage Controlled Oscillator (VCO) on an integrated circuit. The VCO is implemented using a differential-mode circuit design. The differential-mode implementation of the VCO preferably comprises a differential mode LC-resonator circuit, a digital capacitor, a differential pair amplifier, and a current source. The LC-resonator circuit includes at least one tuning varactor and two high Q inductors. The tuning varactor preferably has a wide tuning capacitance range. The tuning varactor is only used to "fine-tune" the center output frequency f0 of the VCO. The center output frequency f0 is coarsely tuned by the digital capacitor. The VCO high Q inductors comprise high gain, high self-resonance, and low loss IC inductors. The IC VCO is fabricated on a high resistivity substrate material using a trench isolated guard ring. The guard ring isolates the fully integrated VCO, and each of its component parts, from RF signals that may be introduced into the IC substrate by other devices. By virtue of the improved performance characteristics provided by the digital capacitor, the analog tuning varactor, the high Q inductor, and the trench isolated guard ring techniques, the inventive VCO is fully integrated despite process variations in IC fabrication.

The embodiment of the invention discloses a two-channel coil antenna and a device applying the two-channel coil antenna, relating to the technical field of antenna and solving the technical problem that cross coupling of two coil antennae is strong in the two-channel coil antenna in the prior art. The two-channel coil antenna in the embodiment comprises a flexible or non flexible medium substrate, a first conductor layer and a second conductor layer are respectively correspondingly arranged on a first surface and a second surface of the medium substrate; the first conductor layer and the second conductor layer are all composed of coils, wherein projection of the coil of the first conductor layer along the normal direction of the plane where the first conductor layer is located and projection of the coil of the second conductor layer along the normal direction of the plane where the second conductor layer is located are mutually separate. The embodiment of the invention is mainly applied to scene of transmitting and receiving signals.

Interleaved three-dimensional (3D) on-chip differential inductors and transformers are disclosed. The interleaved 3D on-chip differential inductors and transformers make the best use of multiple metal layers in mainstream standard processes, such as CMOS, BiCMOS and SiGe technologies.

Disclosed is a semiconductor device which includes a substrate having an air layer or void therein, an interlayer dielectric film above the substrate, and a metal wiring having a spiral structure on the interlayer dielectric film corresponding to or over the air layer. The semiconductor device exhibits reduced parasitic capacitance between the metal wiring (used as an inductor) and the substrate, thereby improving a self-resonance frequency as well as an applicable frequency band of the inductor.

This disclosure provides systems, methods, and apparatus for through substrate via inductors. In one aspect, a cavity is defined in a glass substrate. At least two metal bars are in the cavity. A first end of each metal bar is proximate a first surface of the substrate, and a second end of each metal bar is proximate a second surface of the substrate. A metal trace connects a first metal bar and a second metal bar. In some instances, one or more dielectric layers can be disposed on surfaces of the substrate. In some instances, the metal bars and the metal trace define an inductor. The inductor can have a degree of flexibility corresponding to a variable inductance. Metal turns can be arranged in a solenoidal or toroidal configuration. The toroidal inductor can have tapered traces and/or thermal ground planes. Transformers and resonator circuitry can be realized.

This invention relates to a surface-pasted broadband microwave single layer sheet condenser including a single layer ceramic medium, an up electrode and a down electrode, in which, said up electrode and down electrode are adhered on the two opposite surfaces of the ceramic medium characterizing that said down electrode is divided into two and an electrode clearance is remained between them and a method is also disclosed.

An inductor element includes a resin substrate which is an insulating substrate including conductor patterns, and coils defined by the conductor patterns. Two coils are arranged on the same plane, and connected in series. Adjacent coils define a closed magnetic circuit. That is, the winding direction and the connection of the coils are determined such that magnetic flux that interlinks coils that are adjacent in the planar direction define a loop. There are also provided an inductor bridge and a high-frequency filter that include the inductor element.

A multilayer ceramic capacitor of a low ESL comprises a ceramic core body, two lead wires conductively connected to the ceramic core body and an insulating shell wrapping the ceramic core body. The lead wires are an ''L''-shaped structure formed by a current-conducting plate and a welding plate which are vertically connected to each other. The current-conducting plate and the ceramic core body are conductively connected and are covered by the insulating shell. The welding plate is located at a bottom of the insulating shell and possesses a welding segment which is laterally stretched out of the insulating shell. Through using the ''L''-shaped lead wires, lead wire lengths are greatly reduced and bending angles of the lead wires are decreased so that the ESL can be greatly reduced, a self-resonant frequency of the capacitor is increased and the capacitor can be applied in a high frequency circuit.

The invention provides paint capable of shielding a chromatic circle inductor and a process for coating the chromatic circle inductor. The paint capable of shielding the chromatic circle inductor is characterized by comprising the following materials in percentage by mass: 25-50% of chromatic circle inductor paint, 20-55% of soft magnetic ferrite magnetic powder, 10-30% of liquid curing agent and 10-30% of diluent; the manufacturing method for the paint capable of shielding the chromatic circle inductor and the process for coating the chromatic circle inductor comprise the steps of coating for two times by using the paint capable of shielding chromatic circle inductor, and then coating for two times by using the paint capable of shielding chromatic circle inductor. The paint capable of shielding the chromatic circle inductor and the process for coating the chromatic circle inductor have the advantages that interference on other parts caused by leakage flux generated in operating of the chromatic circle inductor can be effectively shielded; the cost of the coating can be greatly reduced; the inductance value can be increased; the self-resonance frequency is increased; and the paint is mainly suitable for packaging of the chromatic circle inductor.

A suspended strip line ultra-wideband zero-point-adjustable band-pass filter disclosed by the invention is small in area, high in integration level and excellent in standing wave performance. According to the technical scheme, at least two resonators and a double-layer metallization coupling via hole which are arranged between double rows of metallization coupling via holes are distributed on the front face and the back face of a dielectric substrate, and each resonator is jointly composed of a main resonator located on one side and a resonator loading capacitor located on the other side; the resonator loading capacitors of all the resonators are connected with the metal ground at the two sides of the dielectric substrate; and transmission lines at the two ends achieve connection of the upper layer and the lower layer through a metalized through hole, and the self-resonant frequency of each resonator can be adjusted by adjusting the size of the resonator loading capacitor on the back face of the dielectric substrate of the resonator. The size of the capacitance loading part is increased, so that the self-resonant frequency of the resonators shifts towards the low-end direction of the frequency, the capacitance loading size of the back surface of the resonators is reduced, the self-resonant frequency of the resonators shifts towards the high-end direction of the frequency.

A coupler structure of a mobile terminal having a repeater applied thereto is provided. The coupler structure includes a first substrate having a reception coupler, a second substrate having a transmission coupler, and a repeater disposed between the first substrate and the second substrate.

The invention discloses a sunken spiral inductor structure and a fabrication method thereof. The method comprises the following steps of etching a groove in a semiconductor substrate, depositing a bottom-layer metal coil and a top-layer metal coil, and forming the sunken spiral inductor structure. By the design of changing the top-layer metal coil and the bottom-layer metal coil of an inductor tobe air gaps and taking air as a medium, a Q (quality factor) value is substantially improved, meanwhile, the self-resonant frequency is also improved, so that an inductance value is improved, the power loss is reduced, and the performance of the inductor is better. On the basis of the sunken spiral inductor structure, the parasitic capacitance on the semiconductor substrate can be greatly reduced.

A small balancer coil for cold-cathode florescent lamps having sufficient shunt/balance effects, comprises a discharge lamp, a conductor located close to the discharge lamp, and two coils whose magnetic fluxes face each other. The magnetic fluxes generated in the coils face and cancel each other. Lamp currents of the discharge lamps are balanced by making the sum of the reactances of the mutual inductance of the balancer coil larger than the negative resistance of the discharge lamp. Section winding is applied to each coil of the balancer coil so as to maintain shunt and balance effects even in a small/flat balancer coil by making self-resonance frequency of each of the coils higher.

The invention aims to provide lightening protection equipment which is used to inhibit, discharge and damp lightening interference and atmospheric discharge of an antenna-feeder system. The lightening protection equipment comprises a first capacitor, a second capacitor, a first planar inductance coil, and a second planar inductance coil, wherein the first planar inductance coil and the second planar inductance coil are of planar spiral shapes, the number of turns is N, wherein the N is a natural number which is more than or equal to 1; the first planar inductance coil and the second planar inductance coil are supported by supports made of cross insulating materials, each retaining screw is equipped with a corona discharge ring to prevent corona discharge; the first planar inductance coil and the second planar inductance coil are parallelly and oppositely arranged, and have certain distance; and the first capacitor and the first planar inductance coil form a primary resonant circuit, and the second capacitor and the second planar inductance coil form a secondary resonant circuit.

The invention discloses a millimeter wave amplifier matching circuit based on a difference coupling line and belongs to the fields of radio frequency and millimeter wave terahertz integrated circuit design. The circuit is composed of two stages of amplifying circuits and a matching network connected between the two stages of amplifying circuits; each amplifying circuit respectively comprises one NMOS transistor, one feedback capacitor and one group of difference coupling lines; the matching network is divided into an input matching network, an inter-stage matching network and an output matching network; the input matching network adopts a third difference coupling line, the inter-stage matching network comprises a fourth difference coupling line and a first blocking capacitor, and the output matching network comprises a fifth difference coupling line and a second blocking capacitor; and each group of difference coupling line is composed of two transmission lines which are placed in parallel and mutually coupled. The millimeter wave amplifier matching circuit can greatly increase gain while guaranteeing constant power consumption, stability is enhanced under the same conditions, andlayout area is reduced, so that performance of an amplifier is improved.

The invention provides a radio frequency filter and a semiconductor processing device. The radio frequency filter is used for filtering radio frequency signals, which are returned by a radio frequency power source connected with an electrostatic chuck to a DC (direct current) power source connected with the electrostatic chuck. The radio frequency filter comprises an inductor element and a capacitor element, wherein the inductor element is a magnetic core inductor. The radio frequency filter can filter low-frequency radio frequency signals as well as high-frequency radio frequency signals simultaneously and accordingly can filter two or more radio frequency signals with large frequency differences, thereby enhancing the applicability.

The invention provides a method and a device for improving a weak coupling wireless electric energy transmission gain. A plurality of transmitting coil elements are arranged on a transmitting end to form a transmitting coil array, each transmitting coil element is independently connected with a power amplifier, and the output impedance of each power amplifier is regulated according to the influence of every two transmitting coil elements for the integral power gain; and meanwhile, according to a situation that phase displacement between each transmitting coil element of the transmitting end and the receiving coil element of a receiving end is different, the phase of each power amplifier is regulated so as to compensate the phase of the transmitting coil element of the transmitting end. Byuse of the method and the device, the energy transmission gain is improved, so that wireless electric energy transmission can be easily realized, and the method and the device can be applied to smallequipment, including handheld mobile equipment and the like.

The invention relates to an ultralow parasitic inductance design of the discrete decoupling and embedding capacitor in a circuit board. Through holes or blind holes are densely arranged on an electrode, to reduce the parasitic inductance, to increase the working frequency of the embedded capacitor, and to improve the power integrity and the signal integrity of the circuit board. The lowest resonance frequency of the prior discrete embedding capacitor is genarally from hundreds of MHz to 2GHz, the so called medium frequency range. The prior design is hard to exceed 2GHz. With the working frequency of an electronic system is higher and higher and the speed is faster and faster, the corresponding improvement of the working frequency of a capacitor is required. The main factor restricting the working frequency of the embedded capacitor is the excessive parasitic inductance. However, because the restriction of the processing technology, the parasitic inductance is difficult to be reduced through the conventional method. Through using the multi-access method, The invention converts the serial distributed inductance into the parallel inductance, and thereby greatly reduces the parasitic inductance. Theoretically, the invention can reduce the parasitic inductance to zero.

The invention discloses a preparation method of a high-frequency high-Q capacitor, which sequentially comprises the following steps of preparing high-activity composite powder with a 'shell-core' structure, mixing the high-activity composite powder with an organic solvent, a dispersing agent, a plasticizer, a defoaming agent and a slurrying agent to prepare high-rheological-property casting slurry, and carrying out casting treatment to prepare a dielectric film, processing the capacitor ceramic chip into a bar block through dielectric film printing lamination, laminating the bar block into a capacitor green chip, performing high-temperature glue discharging and high-temperature sintering on the capacitor green chip to form the capacitor ceramic chip, covering the surface with a nickel layer and a tin layer, sorting after a reliability test, and packaging qualified products. The capacitor prepared by the invention has the characteristics of high Q value, low equivalent series resistanceand high self-resonant frequency, and ensures extremely low loss transmission of microwave circuit signals.