|
Match
|
Document |
Document Title |
|
|
7627295 |
Downconverter and upconverter
A downconverter and upconverter are provided which can obtain a sufficient image rejection ratio in a low-Intermediate Frequency (IF) scheme while reducing power consumption and can suppress Error...
|
|
|
7623837 |
Receiver for an integrated heterodyne communication system including BAW-type resonators
A heterodyne receiving circuit for a digital communication system including a first band pass filter receiving a signal from an antenna, an amplifying circuit and a second narrow band pass filter...
|
|
|
7620379 |
Radio frequency tuner
A radio frequency tuner comprises one or more tracking filters ahead of at least one frequency changer. A controller has a filter alignment mode and a reception mode. Each filter has one or more...
|
|
|
7610029 |
Method for active Gm-C filter gain control
An integrated circuit chip include a transmitter configured for transmitting an electromagnetic signal, a receiver configured for receiving an electromagnetic signal, and an amplifier operatively...
|
|
|
7610034 |
Method and apparatus for selection of design parameters for double conversion tuner to prevent radiated immunity degradation
A double conversion tuner system is disclosed that avoids the problem of degraded performance as a result of radiated interferers. Several selection criteria are described for specifying the...
|
|
|
7590396 |
Multimode communication device with shared signal path programmable filter
A multimode communication device with a shared signal path programmable filter and a method for utilizing a shared signal path programmable filter in a multimode communication device. Various...
|
|
|
7587183 |
Multi-frequency antenna assemblies with DC switching
According to various exemplary embodiments, apparatus, systems, and methods are disclosed for use with antenna systems operable for receiving first and second signals having respective first and...
|
|
|
7583936 |
Circuit with reduced insertion loss and component comprising one such circuit
An electrical circuit has at least two parallel signal paths connected to one another on the antenna side and for which a band reject filter corresponding to the transmission range is implemented...
|
|
|
7583944 |
Demodulation and regulation concept for IR receivers
A method and circuit for amplifying and demodulating amplitude-modulated signals is disclosed that amplifies a primary signal into an amplified signal, bandpass filters the amplified signal into a...
|
|
|
7583950 |
High linearity tunable bandpass filter
A tunable bandpass filter ( 10 ) is provided. An RF signal is provided at an input of the tunable bandpass filter, and a level shifted control signal (V 1, V 2 ) inputted to the tunable bandpass...
|
|
|
7579931 |
Surface acoustic wave filter element, surface acoustic wave filter and communication device using the same
A surface acoustic wave filter element has
a piezoelectric substrate; and a plurality of inter-digital transducer (IDT) electrodes formed on the piezoelectric substrate, wherein at least one...
|
|
|
7577413 |
Method and apparatus for calibrating a filter of a receiver
According to a disclosed method, a calibration signal is provided at a first frequency corresponding to a low frequency edge of a desired passband to an input of a filter ( 240 ). A first value is...
|
|
|
7570937 |
Comfort noise generator
Comfort noise is derived from a white noise signal by filtering the white noise signal in a QMF bank to produce comfort noise signal that is selectively coupled to at least one channel in a...
|
|
|
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...
|
|
|
7545889 |
Blocker performance in a radio receiver
Configuring a multiple stage band pass filter of a radio frequency receiver commences by setting a corner of a low pass mixer output filter that receives a down sampled analog information signal....
|
|
|
7539470 |
Tracking filter for selecting channel of wideband frequency
The present invention relates to a filter, and more particularly, to a tracking filter for selecting a channel of a wideband frequency. The tracking filter for selecting a channel of a wideband...
|
|
|
7522896 |
Filter control method, signal processing circuit and integrated circuit for wireless receiver
A conventional method of controlling the passband of a filter involves an increase in cost for a chip due to a large area of a detection circuit for determining the level of an interference wave....
|
|
|
7519344 |
Bandpass amplifier, method, and system
An amplifier has a band pass response. The band pass response may be set by setting corner frequencies of low pass filters.
|
|
|
7512392 |
System for adaptively filtering a received signal in a wireless receiver
An adaptive band-pass filter for a wireless receiver comprises a band-pass filter associated with the receiver, the band-pass filter configured to selectively filter the received signal, and a...
|
|
|
7499694 |
Tuner alignment
In a method of tuning a receiver for a digital signal (MPEG2-TS), an input signal (RF-in) is filtered (In-filt, Band-filt) to obtain a processed signal, a digital figure of merit (BER) is...
|
|
|
7486338 |
Fully integrated terrestrial TV tuner architecture
A TV tuner consisting of a least one low-noise amplifier, one mixer and one variable-gain amplifier plus two band-pass filters, the first of which is placed after low-noise amplifier and before the...
|
|
|
7443269 |
Method and apparatus for selectively blocking radio frequency (RF) signals in a radio frequency (RF) switching circuit
An RF switching circuit that incorporates a film bulk acoustic resonator (FBAR) device and one or more capacitors that are used to vary the capacitance of the FBAR device to change the frequency...
|
|
|
7437139 |
Method and apparatus for calibrating filtering of a transceiver
A method and apparatus of calibrating filtering of receive and transmit signals is disclosed. The method of calibrating filtering of a received signal includes injecting an LO signal. The injected...
|
|
|
7433668 |
Controlling Q-factor of filters
The present invention provides a method and an apparatus for controlling a Q-factor for a filter. The method comprises stabilizing an active feedback to provide a variable feedback in a filter,...
|
|
|
7428262 |
Channel estimation in a rake receiver of a CDMA communication system
A method and apparatus for channel estimation in a rake receiver of a CDMA communication system operates with a finite-impulse-response channel estimation filter with L taps and having a fixed...
|
|
|
7415264 |
Low noise filter for a wireless receiver
A low noise filter is arranged to receive an input signal from a downconverter. The low noise filter is constructed to block or cancel any DC offset in the input signal, as well as filter selected...
|
|
|
7409200 |
Module integration integrated circuits
A first signal conditioning circuit is formed from a first portion, a second portion and a third portion. Signal conditioning functions of each of these portions are facilitated by a predetermined...
|
|
|
7406304 |
Electronic component with integrated tuning device, allowing the decoding of digital terrestrial or cable television signals
An integrated superheterodyne dual-conversion tuner upconverts a signal so as to place it outside a reception band, and then downconverts the signal with a non-zero intermediate frequency. A first...
|
|
|
7398065 |
Programmable sampling band pass filter
A variable bandwidth, sampled analog filter can be programmed to have a variety of responses. A variable bandwidth, sampled analog filter is preferably a sampled analog resonator based filter that...
|
|
|
7395044 |
Signal processing apparatus and method of differential transformer
A measuring apparatus employing a differential transformer includes a high-frequency oscillator which generates a high-frequency signal having a frequency higher than the excitation frequency of...
|
|
|
7376440 |
N-plexer systems and methods for use in a wireless communications device
A wireless communication device comprises an N-plexer, that is, a multi-band device, connected to a single antenna for receiving multiple communication bands on the single antenna. The N-plexer...
|
|
|
7366486 |
System and method for coarse/fine PLL adjustment
An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programable attenuation...
|
|
|
7358862 |
Radiosonde system, radiosonde system receiver and signal processing method in a radiosonde receiver
This publication discloses a radiosonde system, a radiosonde system receiver and a signal processing method for use in a radiosonde system. The radiosonde system comprises at least one radiosonde (...
|
|
|
7352911 |
Method for bilateral filtering of digital images
A method for processing an image using a bilateral filter. The bilateral filter is reformulated at each pixel location in the image into a sum of the original signal value of a central pixel at...
|
|
|
7346327 |
Wireless receiving circuit and wireless portable device
A wireless receiving circuit includes a mixer, a buffer, an active low-pass filter, and a second order passive low-pass filter which are connected between a signal input terminal and a signal...
|
|
|
7343142 |
Tuner
A digital terrestrial tuner has an RF input connected to a filter arrangement, whose output signal is supplied to a zero intermediate frequency frequency changer. The filter arrangement comprises a...
|
|
|
7340237 |
Dual-band active filter
The present invention discloses a dual-band active filter having filtering response and positive pass-band gain. The dual-band active filter includes an input match unit for gain match of the...
|
|
|
7333793 |
Method for performing packet switched handover in a mobile communication system
The invention relates to a method and system for performing packet switched handover in a mobile communication network. The system comprises a mobile node, a first and a second packet switching...
|
|
|
7327996 |
High sensitivity radio receiver
The invention relates to a high sensitivity receiver installed outdoors which may be used in a base station of a mobile communication system, for example. A received radio frequency signal is...
|
|
|
7321754 |
Radio-frequency signal frequency conversion device for a low power RF receiver
The radio-frequency signal frequency conversion device generates intermediate complex signals (IF) for a correlation stage of a low power RF receiver. In order to do this, the device includes a...
|
|
|
7319852 |
Apparatus and method for DC offset compensation in a direct conversion receiver
An apparatus for coarse compensation of a direct current (DC) offset in a direct to baseband receiver architecture utilizes a serial analog to digital converter (ADC), such as a Delta-Sigma...
|
|
|
7315731 |
Method of measuring and calibrating frequency down converter
A frequency down converter that maintains accuracy even if the frequency pass band is wide uses a reference frequency band within the frequency pass band, the reference frequency band being...
|
|
|
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...
|
|
|
7292834 |
Switchable high frequency bandpass filter
A switchable high frequency bandpass filter includes an input node and an output node, a switchable LC resonator, and a switch signal input interface circuit. The switchable LC resonator is coupled...
|
|
|
7289784 |
Active tunable filter circuit
An active tunable filter circuit for use as an integratable active filter in a mobile radio apparatus, comprises an active amplifier circuit (A) including a reactive feedback network including a...
|
|
|
7286811 |
Local oscillator apparatus and method
A direct conversion satellite tuner is fully integrated on a common substrate. The integrated tuner receives an RF signal having a plurality of channels and down-converts a selected channel...
|
|
|
7283840 |
Reconfigurable analog baseband for a single-chip dual-mode transceiver
A dual-mode analog baseband circuit is implementable on a single IC with reduced chip area. The baseband portion of the IC includes a single dual-mode complex filter that is reconfigurable to be a...
|
|
|
7269424 |
Mobile terminal implementing a ranging signal receiver and method
Mobile terminal implementing a ranging signal receiver and method. Means are provided to incorporate ranging signal reception capability into a mobile terminal (such as a UMTS terminal)...
|
|
|
7269156 |
High-frequency circuit device
A high-frequency circuit device is provided that is conformable to both of the TDMA system and the CDMA system as well as a plurality of frequency bands and achieves low cost and low power...
|
|
|
7266351 |
Transconductance / C complex band-pass filter
A complex filter such as the channel select filter in a radio transceiver is implemented using a transconductance/C topology to benefit from the ability to tune such filters and thereby stabilize...
|