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7339446 |
Tunable resonator with MEMS element
According to an embodiment of the present invention, a microelectromechanical system (MEMS) element tunes a resonator to a frequency.
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7317364 |
Varactor tuning for a narrow band filter including an automatically controlled tuning system
A method and apparatus for providing dynamic and remote tuning of a cryo-cooled bandpass filter is disclosed. The device includes resonator element and a voltage sensitive element as part of the...
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7209866 |
Method and arrangement for automatic adjustment of devices having setting elements, and a corresponding computer program product and a corresponding computer-readable storage medium
Devices having setting elements are adjusted by carrying out a first measurement of a characteristic curve to be controlled at predefined measurement points, each setting element assuming a...
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7171238 |
Self-identifying antenna system
An antenna system is disclosed, to be used with a radio component particularly a wireless access point or bridge. The present system includes an antenna element for transmitting and receiving...
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7135940 |
Tunable filter and portable telephone
A tunable filter has a plurality of variable capacitors and a plurality of inductor elements, each being formed on a common substrate, a filter circuit formed by using at least a portion of the...
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7102465 |
Frequency discrete LC filter bank
An inductive (“L”)-capacitive (“C”) filter bank has application for use in a television receiver. The LC filter includes inductors configured in at least one inductive (“L”) bank, and...
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7102457 |
Mechanically balanced microwave load pull tuner
A mechanically balanced automatic microwave tuner is used in on-wafer device testing. Using low loss rigid airlines to connect the tuner and the devices improves the tuning range at the DUT...
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7071791 |
Automatic antenna-switching apparatus and system
An automatic antenna-switching apparatus is provided for the user to connect a single multiband communications platform to a group of antennas with different frequencies by detecting the RF energy...
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7057452 |
Method and circuit for correcting the offset of an amplification chain
A circuit for correcting the offset of an amplification and filtering chain having a predetermined gain and cut-off frequency depending on the value of at least one capacitor, comprising: a...
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7049902 |
Tunable high-order bessel low pass filter
A tunable high-order Bessel low pass filter which is applied to a multi-rate duobinary generation system of an optical communication system. The tunable Bessel low pass filter comprises a variable...
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7023293 |
Method for tuning a radio filter, a radio filter and a system comprising such a radio filter
The present invention relates to a method for tuning a radio filter. The filter comprises an input connection, an output connection and at least two resonator modules coupled in cascade, each...
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7002427 |
Filter trimming
An adjustable phase shifter generates a phase shifted reference signal by introducing a phase shift in a reference signal. A phase detector identifies a phase difference between the reference...
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6989720 |
Receiver
A receiver capable of reducing the number of pads of a semiconductor device used for connection with a tuning circuit. The receiver includes a semiconductor device 100 containing various circuits...
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6965275 |
Method and apparatus for tuning a filter
A method and an apparatus for tuning a filter is provided wherein the filter has at least one adjustable element for adjusting at least one performance parameter of the filter like for example a...
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6954115 |
Methods and apparatus for tuning successive approximation
A method for tuning a filter to a desired frequency using successive approximation. Elements of the filter are selected according to a control code used to vary the filter's oscillation frequency....
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6930565 |
Fully integrated automatically-tuned RF and IF active bandpass filters
An automatic tuning scheme for two active band-pass filters where both filters operate on the signal while simultaneously being tuned using a reference signal. To allow that the amplitude of a...
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6917252 |
Fully integrated automatically-tuned RF and IF active bandpass filters
An automatic tuning scheme for two active band-pass filters where both filters operate on the signal while simultaneously being tuned using a reference signal. To allow that the amplitude of a...
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6894580 |
Filter tuner system and method
A system and method for a filter tuner is presented. The system comprises a sequential logic, a register, a comparator, a first and second counter, a synchronizing logic, a first and second...
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6888421 |
Power attenuator with coupling port
A power attenuator with at least one coupling port. The coupling port may be provided to monitor input power levels, out put power levels, or other operations of the power attenuator. One or more...
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6882246 |
System and method for an electronically tunable frequency filter having constant bandwidth and temperature compensation for center frequency, bandwidth and insertion loss
A novel system and method for a frequency tunable filter is described. The inventive system and method may be used, for example, in multi-band cellular phones and/or transceivers in wireless...
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6882245 |
Frequency discrete LC filter bank
An inductive (“L”)-capacitive (“C”) filter bank has application for use in a television receiver. The LC filter includes inductors configured in at least one inductive (“L”) bank, and...
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6823292 |
Tuneable filter
A tuneable filter, for example an antenna filter in a single chip radio receiver, comprises a frequency selective circuit ( 12 ) including passive reactive components. At least some of the reactive...
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6822540 |
Tuning a cavity filter based on positional data for tuning members
A method for tuning a cavity filter is provided. The cavity filter includes a plurality of tuning members. The method includes selecting a stored set of positional values for the tuning members,...
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6819197 |
Multiple bandwidth phase lock filters for multimode radios
An apparatus and method for filtering a signal in a phase lock loop is disclosed. An typical apparatus for filtering a phase error signal comprises a first filter subcircuit receiving a phase error...
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6798312 |
Microelectromechanical system (MEMS) analog electrical isolator
A microelectromechanical system (MEMS) analog isolator may be created in which an actuator such as an electrostatic motor drives a beam against an opposing force set, for example, by another...
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6791430 |
Resonator tuning assembly and method
A device and method for tuning a planar filter through a wide range of center frequencies are disclosed. The tuning assembly includes a superconductive tuning tip and an actuator configured and...
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6781474 |
Apparatus and method for tuning a filter
An apparatus and method for tuning a filter ( 11 ) with oscillator alignment for applications where the filter tuning signal ( 19, 27 ) is generated independently of the local oscillator tuning...
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6778023 |
Tunable filter and method of tuning a filter
A bandpass filter is tuned by converting the filter into an oscillator using a negative resistance circuit, tuning the oscillator by using conventional tuning techniques such as tuning a varactor...
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6765452 |
Method and apparatus for damping an LC filter
A method for damping an LC filter coupled to a converter and generating a filter signal. The method comprises sensing the filter signal and processing the filter signal to generate a corresponding...
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6759916 |
High-frequency filter device, filter device combined to a transmit-receive antenna, and wireless apparatus using the same
A high-frequency filter device includes at least one filter to be connected to a high-frequency stage of a wireless apparatus. The filter includes a voltage-controlled variable frequency resonance...
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6750734 |
Methods and apparatus for tuning an LC filter
A receiver, such as a television receiver, tunes an inductive (“L”) and capacitive (“C”) filter based on a desired frequency. The LC filter includes a plurality of inductors, configured in...
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6750733 |
Coupled resonator filter tuning having inter-resonator interaction compensation
The present invention tunes a coupled resonator filter to a given tuning specification using a reference filter that was previously tuned to the specification. A method of tuning a subject filter...
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6727775 |
Ferrite crystal resonator coupling structure
Single and multiple ferrite crystal resonator, oscillator, and filter coupling structures are disclosed. In one embodiment, a single ferrite crystal resonator coupling structure is configured as a...
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6664873 |
Tunable resonator
A tunable resonator is provided. The resonator includes a housing having a cavity. A resonator body is disposed adjacent to a first surface within the cavity. A gap is formed between the resonator...
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6621368 |
Dynamic range extension for an electronic circuit
A circuit for extending the dynamic range of an electronic circuit is provided. The circuit includes a first adjustable attenuation circuit having an input and an output and a control input. The...
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6621367 |
Signal power dynamic range compressing circuit and power amplifier using the same
In an input signal power dynamic range compressing circuit, an input signal is distributed by a directional coupler to a linear signal transfer path and a compressing signal generating path, and in...
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6593828 |
System and method for filter tuning
A system and method for filter tuning are presented. The system comprises means for adjusting the components of a filter by coarse adjustments such that the filter is set with an initial cutoff...
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6545559 |
Tuning method and system
Tuning method for a combiner filter ( 2 ) in an antenna ( 3 ) near system for base station equipment is disclosed. Transmitted signals related to the combiner filter are compared with each other. A...
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6535076 |
Switched charge voltage driver and method for applying voltage to tunable dielectric devices
A circuit for providing a control voltage for tunable dielectric devices, the circuit comprising an input for receiving a voltage command signal, a charging circuit for establishing a desired...
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6535075 |
Tunable on-chip capacity
The invention relates to a tunable on-chip capacity circuit for a semiconductor chip ( 10 ) mounted on a substrate ( 30 ) and including a plurality of power supply decoupling capacitors ( 20-23 )...
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6529088 |
Closed loop antenna tuning system
A tunable resonant system includes an electric element, and a core having a controllable parameter that determines the resonant frequency of the system. In order to tune the resonant system to a...
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6504446 |
Method for adjusting characteristics of dielectric filter, method for adjusting characteristics of dielectric duplexer, and devices for practicing the methods
A method which is capable of easily obtaining specified filter characteristics in a short time, even in the case of a dielectric filter having complicated relationships between changes in the...
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6489854 |
Electronic apparatus for automatically detecting the length of network transmission lines
An electronic apparatus for automatically detecting the length of network transmission lines. The electronic apparatus essentially comprises a detection device, an analog/digital (A/D) converter, a...
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6472947 |
Multiple signal path antenna circuit having differential attenuation between signal paths
An antenna circuit is described which makes it possible to suppress intermodulation products. This antenna circuit includes an antenna connection device to which at least one first antenna can be...
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6437655 |
Method and apparatus for automatically adjusting the characteristics of a dielectric filter
A method and an apparatus for exactly and automatically adjusting the characteristics of a dielectric filter in a short time period. The characteristic parameters of a dielectric filter are...
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6392501 |
Method and arrangement for tuning a resonator
The invention relates to a bandpass filter that follows the frequency of an input signal especially for reducing the noise on the receive band of mobile communications devices. More specifically...
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6380819 |
Tuning method for filters having multiple coupled resonators
A tuning method for filters having multiple coupled resonators isolates the characteristics of each resonator, enabling a specified filter response to be achieved by adjusting the resonators...
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6307443 |
Bandpass filters with automatic tuning adjustment
A method and system for tuning a tunable bandpass filter includes a bandpass filter having a passband which is dependant on the value of a tuning signal. A data signal having a dominant frequency...
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6307442 |
Enhanced LC filter with tunable Q
A tunable electronic filter circuit is provided including an input terminal and an output terminal connected to the input terminal with a node therebetween. An inductor, a variable capacitor, and a...
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6297709 |
Temperature compensated variable attenuator
A temperature compensated variable attenuator comprising a variable attenuator having at least one diode with temperature variations across the at least one diode producing a temperature offset...
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