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8179209 |
Complex resonance circuit
A serial resonance circuit is prepared. The serial resonance circuit is configured of a pair of resonance circuit is configured of a pair of resonance elements serially connected to each other at a...
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8115571 |
Harmonic filter
A Passive harmonic filter (F) has an input node (B) for connection to a power supply (1), an output node (C) for connection to a load (15, 17) and an intermediate node (A). A first branch (3, 4)...
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8102219 |
Electromagnetic bandgap structure and printed circuit board
An electromagnetic bandgap structure is disclosed. In accordance with an embodiment of the present invention, the electromagnetic bandgap structure can include a dielectric layer, a plurality of...
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8081052 |
Electromagnetic bandgap structure and printed circuit board
An electromagnetic bandgap structure and a printed circuit board having the same are disclosed. In accordance with an embodiment of the present invention, the electromagnetic bandgap structure can...
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8076998 |
Electromagnetic bandgap structure and printed circuit board
An electromagnetic bandgap structure is disclosed. In accordance with an embodiment of the present invention, the electromagnetic bandgap structure that blocks a noise of a certain frequency band...
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8072297 |
Apparatus and method for improving channel filter selectivity and performance using voltage variable impedance elements
A controllable filter arrangement with a voltage controlled device that subjects a signal to a predetermined impedance as part of the filtering process when the voltage controlled device is in an...
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8058949 |
Compact RC notch filter for quadrature and differential signaling
In varying embodiments, the present inventive concepts relate to a notch filter for quadrature and differential signaling. No inductor is used in this notch filter, thus the integrated circuits...
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8058950 |
Highly selective passive filters using low-Q planar capacitors and inductors
A highly selective frequency filter is created from lossy components such as found in standard integrated circuit technologies, including particularly CMOS technologies, without the use of active...
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8035461 |
Inductive filter and method of reducing vibration sensitivity
A filter according to a present invention embodiment reduces the effects of microphonic behavior in a communications network. The filter passes a network signal, while filtering out unwanted...
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8032093 |
Power detection arrangement with harmonic suppressor
Embodiments of circuits, devices, and methods for a power detection arrangement are disclosed. The power detection arrangement may have a coupler coupled with, and in between, a switch and an...
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8022575 |
Damping electromagnetic oscillations in power systems
Exemplary embodiments of the present disclosure provide a method and controller for damping multimode electromagnetic oscillations in electric power systems which interconnect a plurality of...
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8013684 |
Radio frequency noise and interference suppression in an integrated circuit
In an integrated circuit having a number of circuit units on a single semiconductor chip, particularly in a system-on-chip integrated circuit including an integrated transceiver, interference...
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8013689 |
Integrated circuit inductor with transverse interfaces
An integrated circuit (IC) inductor structure is provided with transverse electrical interfaces. The inductor structure is formed on at least one IC circuit layer and has a first axis planar to a...
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8008992 |
Transformer with symmetric structure
A transformer is provided with four capacitors and four inductors. The first capacitor is electrically connected between a first port and ground in series. The first inductor is electrically...
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8004369 |
Arrangement structure of electromagnetic band-gap for suppressing noise and improving signal integrity
An electromagnetic-wave suppression structure in a multilayer PCB or package structure is supplied with a power to be used therein by a power distribution network including a power plane and a...
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7999634 |
Layered low-pass filter having a conducting portion that connects a grounding conductor layer to a grounding terminal
A layered low-pass filter includes: a layered substrate; an input terminal, an output terminal and a grounding terminal each disposed on a periphery of the layered substrate; first and second...
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7973619 |
Electro-magnetic bandgap structure
An electro-magnetic bandgap structure is disclosed. The electro-magnetic bandgap structure in accordance with an embodiment of the present invention includes a plurality of conductive plates...
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7944320 |
Electromagnetic bandgap structure and printed circuit board including multi-via
An electromagnetic bandgap structure and a printed circuit board that intercepts to transfer a signal having a predetermined frequency band are disclosed. In particularly, the electromagnetic...
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7848122 |
Terminator for reducing differential-mode and common-mode voltage reflections in AC motor drives
A terminator reduces reflections on power lines connecting an inverter to an AC motor by providing a differential-mode reflection damping element and at least one common-mode reflection damping...
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7825750 |
EMI filter for controlling cutoff frequency
Disclosed relates to an electromagnetic interference (EMI) filter. Capacitance and resistance or inductance of an EMI filter, which includes a resistor and a capacitor or an inductor and a...
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7755448 |
Differential impedance matching circuit and method with harmonic suppression
Matching network circuits and a method are shown for suppressing a harmonic frequency in a matching network. The circuits and method involve impedance matching first and second differential input...
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7738610 |
Method and apparatus for automatic alignment of notch filters
A method and apparatus are provided for automatic alignment of a notch filter in a receiver. The method comprises the steps of determining a frequency of an interfering signal, monitoring an energy...
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7679473 |
Low pass filter incorporating coupled inductors to enhance stop band attenuation
The present invention relates to a low pass filter incorporating coupled inductors to enhance stop band attenuation. In one embodiment, the coupled inductors are provided along with various...
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7659797 |
Low-leakage EMC filter
EMC filter, connectable between a supply network and an electric operated appliance to reduce conduction noise between said supply network and said appliance, comprising one voltage regulator...
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7636027 |
Piezoelectric resonator and piezoelectric thin-film filter
A piezoelectric resonator and a piezoelectric thin-film filter including the piezoelectric resonator. The piezoelectric resonator includes a piezoelectric layer disposed between a pair of...
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7555278 |
Unconditionally stable filter
An unconditionally stable on-chip filter includes a filtering section and at least one negative resistance module. The filtering section is operably coupled to filter a signal and includes...
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7511596 |
Dual bandpass filter having serial configuration of coupled-line filters
Two second-order bandpass filter are connected serially to obtain a dual bandpass filter. One is inductive and the other is capacitive. One has a low passband and the other has a high passband....
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7446631 |
Radio frequency inductive-capacitive filter circuit topology
A filter circuit topology for filtering a radio frequency input signal includes one or more inductor devices, such as, for example, discrete chip or air coils. The inductor devices are center...
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7424276 |
Transmitter and wireless communication apparatus using the transmitter
In a transmitter of polar-loop architecture having a phase control loop and an amplitude control loop, as loop filters for controlling a loop band of the amplitude control loop, a first filter with...
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7308241 |
Receiver system
A conventional receiver system has a filter circuit with unsatisfactory gain characteristics, and thus does not offer satisfactory reception performance. A receiver system of the invention has a...
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7292449 |
Virtual ground return for reduction of radiated emissions
A digital apparatus having a cable comprising a plurality of high-speed and low-speed signal carrying conductors, the conductors carrying the low-speed signals are bypassed to a signal ground with...
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7259639 |
Inductor topologies and decoupling structures for filters used in broadband applications, and design methodology thereof
Inductor topologies for filters used in broadband applications are described. In one implementation, an apparatus, such as an interface module includes a printed circuit board and a filter. The...
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7259643 |
Tunable wideband bandpass filter, tunable multi-band bandpass filter using the same, and methods therefore
A tunable wideband bandpass filter that can digitally vary the center frequency and bandwidth of a signal to be filtered, and includes a plurality of switched-capacitor banks for varying...
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7197284 |
Antenna switches including field effect transistors
The present invention provides a transceiver circuit that includes a transmission amplifier coupled with an antenna input/output node. The transmission amplifier is configured to amplify...
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7177612 |
Frequency generator and communication system using the same
A frequency generator which can perform stable frequency oscillation unaffected by temperature variation. A frequency generator having a differential amplifier (1) having an LC resonance circuit...
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7126443 |
Increasing performance of planar inductors used in broadband applications
Increasing performance of planar inductors used in broadband applications is described. In one implementation, an apparatus includes a high Quality factor (Q) value spiral planar inductor etched...
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7002434 |
Lumped-element transmission line in multi-layered substrate
A lumped-element transmission line is formed in a multi-layered substrate. A mutual inductance between first and second inductors in a T-equivalent circuit model is enlarged to a designed positive...
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6954119 |
Cascaded arrangement of lower order filters and method of designing the same
A passive filter arrangement and a method of providing such a filter is described. The frequency response of the filter arrangement is substantially the same as the frequency response of a first...
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6944435 |
Unconditionally stable on-chip filter and applications thereof
An unconditionally stable on-chip filter includes a filtering section and at least one negative resistance module. The filtering section is operably coupled to filter a signal and includes...
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6914477 |
Bandpass filter unit and communication apparatus
A bandpass filter unit includes first and second bandpass filters having substantially the same pass-band characteristics. The first and second bandpass filters are connected in parallel with each...
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6903628 |
Lowpass filter formed in multi-layer ceramic
A laminated lowpass filter includes nine dielectric substrates arranged in a stack. The outer surfaces of the stack are ground planes. From top to bottom, top four layers forms a first MIM...
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6894585 |
High quality factor (Q) planar spiral inductor based CATV diplexer and telephony module
A cable television diplexer and telephony module that can be employed in CATV data transmission systems to enhance performance levels and reduce manufacturing costs. The cable television diplexer...
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6861926 |
π-Type band pass filter
An improved band pass filter of π-type inductor is disclosed, which utilizes the serial inductor in the π as a compensating inductor, which can lower the coupling coefficient of the band pass by a...
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6809613 |
Low-reflection transmission-line filters with gaussian characteristics
A transmission line filter having low reflectivity and Gaussian characteristics includes at least one inductive element aligned along the transmission line and at least one shunt configuration...
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6791436 |
Modular electrical signal filter assembly
A modular electronic signal filter assembly is provided, including a plurality of modular filter housing members joined to one another in a longitudinal direction via a plurality of coupling...
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6737935 |
Diplex circuit forming bandstop filter
A bandstop filter for use in CATV applications is formed by a pair of diplexers, a lowpass filter and a highpass filter. Signals having a frequency range of, e.g., 0-3 GHz enter at a first node...
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6734759 |
Droop compensation filter having high pass characteristic
A filter is applied between a digital signal source and a signal receiver for providing compensation of droop caused in a transmission path between the signal source and the signal receiver. The...
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6696885 |
Polyphase filters in silicon integrated circuit technology
An IQ generator is integrated into an IC for generating IQ output signal. The IQ generator includes a signal generator providing input with two identical signals opposed in phase, a filter...
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6686814 |
Voltage tunable varactors and tunable devices including such varactors
A voltage tunable dielectric varactor includes a substrate having a low dielectric constant and having generally planar surface, a tunable ferroelectric layer positioned on the generally planar...
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6683508 |
System and method of increasing a self-resonant frequency of a tuning circuit and an oscillator employing the same
A segmented inductor for use with a tuning circuit, a method of increasing a self-resonant frequency of a tuning circuit and an oscillator employing the circuit and method. In one embodiment, the...
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