Class / Patent application number | Description | Number of patent applications / Date published |
455188100 | Band selection | 32 |
20080248770 | BROADBAND RECEPTION SYSTEM - A reception system is proposed which is intended for receiving radio broadcasting in the AM and FM bands having an antenna coupled to an analog part on the input side, for receiving a complete reception band. The system also has a frequency selection module and a digital part that is set up to output a demodulated audio signal. The selection module comprises, as seen in the signal flow, of a filter, an attenuation element that can be regulated, a fixed amplifier, and a further filter. The output side band of the analog part provides a band limited and level-regulated signal that is sampled in an analog to digital converter at a frequency f | 10-09-2008 |
20090042524 | DIGITAL COMB LIMITER COMBINER - A wideband receiver comprises a comb limiter combiner wherein the limiting is conducted by digitization and frequency excision in the frequency domain. The received signal is divided up into sub-bands by a bank of bandpass filters having contiguous pass bands spanning the entire receiver range. In each sub-band the band limited signal is digitized and subjected to digital signal processing. A threshold is set such that any frequency with a magnitude that exceeds the threshold is excised in the frequency domain. When converted back to the time domain, the high-power interference frequencies will no longer be present, thereby leaving only the low-power noise and the desired signal. | 02-12-2009 |
20090117867 | SCALABLE BANDWIDTH SYSTEM AND METHOD OF CONTROLLING TUNABLE FILTER - The present invention relates to a scalable bandwidth system and a method of controlling a tunable filter. In the present invention, the scalable bandwidth system inputs, as a control signal of a tunable filter, a voltage corresponding to a section in which the capacitance according to an applied voltage is not practically changed for characteristics of varactor diodes, and inputs each control bit of the control signal to each varactor diode of the tunable filter to adjust the capacitance of each of the varactor diodes, and consequently adjusts the capacitance of the tunable filter by adding the capacitance of the varactor diodes. | 05-07-2009 |
20100093296 | DOWNCONVERSION STRATEGIES FOR REDUCING INTERFERENCE IN WANTED SIGNALS - A receiver for isolating a wanted signal in a received signal, the receiver comprising a downconverter for downconverting the received signal in frequency to produce a downconverted signal, a filter with a passband intended for isolating that part of the spectrum of the downconverted signal that contains the wanted signal and a controller that seeks to avoid or reduce the effect of passband intrusion in the form of a negative frequency representation of an interferer, appearing in the spectrum of the received signal, upconverted in frequency to the passband. The invention consists in corresponding methods also. | 04-15-2010 |
20100112969 | TUNER DEVICE - A tuner device includes tuner circuits, where each of the tuner circuits includes a radio frequency amplifier amplifying a radio frequency signal of a transmitted broadcast wave, a frequency mixing circuit performing frequency conversion for the transmitted radio frequency signal, and a local oscillation circuit transmitting a local oscillation signal to the frequency mixing circuit, wherein the local oscillation circuit includes, at least, a reference signal source, a first frequency divider, and a second frequency divider, oscillates a local oscillation signal having a local oscillation frequency, and makes a difference between local oscillation frequencies of the tuner circuits, the difference being generated when the tuner circuits receive the broadcast waves of the same frequency, greater than or equal to a predetermined value. | 05-06-2010 |
20100197256 | ADJUSTABLE RECEIVE FILTER - An adjustable filter is responsive to a control signal to change a frequency response of the adjustable filter based on at least one of a geographic location, frequency spectrum information, and a status of a secondary internal radio. The control signal may shift a center of the pass band from a first center frequency to a second center frequency and/or change a pass band bandwidth from a first bandwidth to a second bandwidth. A receiver includes an adjustable filter responsive to a control signal and controller configured to select a frequency response of the adjustable filter by generating the control signal based on a geographical location. In one aspect the geographical location indicates a region of operation of the receiver and the frequency response is selected in accordance with the region. | 08-05-2010 |
20100197257 | ADJUSTABLE RECEIVE FILTER RESPONSIVE TO FREQUENCY SPECTRUM INFORMATION - An adjustable filter is responsive to a control signal to change a frequency response of the adjustable filter based on frequency spectrum information. The control signal may shift a center of the pass band from a first center frequency to a second center frequency and/or change a pass band bandwidth from a first bandwidth to a second bandwidth. In one example, the frequency spectrum information includes a status of an internal secondary radio. The frequency spectrum information may also indicate a region of operation where the frequency response is selected in accordance with the region. | 08-05-2010 |
20100323649 | CIRCUIT ARRANGEMENT WITH RADIO-FREQUENCY MIXER, AND RECEIVER ARRANGEMENT WITH THE CIRCUIT ARRANGEMENT - A circuit arrangement is disclosed with a radio-frequency mixer in which a plurality of preamplifiers in a receiver have a common output node. This node is connected to a common, broadband radio-frequency mixer via common coupling capacitances. Switching means can be used to connect and disconnect the preamplifiers, which can be associated with various frequency bands, independently of one another. The present principle can be applied in multiband receivers in mobile radio and allows integration using little chip area with good radio-frequency characteristics. | 12-23-2010 |
20110076974 | FLEXIBLE WIRELESS NETWORK SYSTEM AND METHOD OF USE - A flexible wireless network system adapted for switching to a desired frequency and efficiently amplifying signal strength of an input RF signal of the desired frequency in wireless communications while meeting ACLR requirements. The system includes an input source to receive the input RF signal, a input filter bank RF amplifier, a pre-distortion engine, a high gain amplifier connected to the pre-distortion engine, a filter module, a low gain amplifier connected to the filter module, an output antenna connected to the low gain amplifier, a computer to control switching in the input filter bank and the filter module so that the correct filters are used with the input RF signal. The input filter bank and FM Filter banks include a filter capable of switching between a multiple of frequencies so that the frequency of the input RF signal can be selected and received into the system from the input source. | 03-31-2011 |
20110171918 | MEMS BASED MULTIBAND RECEIVER ARCHITECTURE - A system to receive using MEMS elements is provided. The system includes means for receiving a broadband signal; means for selecting a superband of frequencies from the received broadband signal; means for selecting bands within the superband of frequencies, wherein the bands each have a center frequency that is offset from the other center frequencies; means for steering output from the means for selecting bands; and means for receiving the output from the means for steering output | 07-14-2011 |
20120009889 | Narrow-band tunable radio frequency (RF) power amplifiers and related methods - Narrow band tunable radio frequency (RF) power amplifiers (PAs) and related methods are disclosed that provide narrow band tunable gain responses, such as linear gain responses, that can be selected for different frequency bands. The narrow band tunable PAs thereby provide out-of-band rejection for different selectable frequency bands so that narrow band filters are not required in the transmit input path for communication devices. The passband location and/or bandwidth for the narrow band gain response can be tuned using different techniques, as desired. The narrow band tunable PAs can also be fabricated using CMOS processing, if desired, so that a CMOS PA integrated circuit is provided. | 01-12-2012 |
20130052973 | LOW-POWER AND NOISE-CANCELLING WIDEBAND RECEIVER FRONT-END - One embodiment of the present invention provides a receiver for wireless communication. The receiver includes a group of band-pass filters (BPFs), a wideband amplifier coupled to the BPFs, and a tunable demodulator coupled to the wideband amplifier. A particular BPF is configured to filter RF signals at a particular frequency band. The wideband amplifier is configured to amplify the filtered RF signals. The tunable demodulator is configured to demodulate the amplified RF signals. | 02-28-2013 |
20130165063 | SIGNAL PROCESSING CIRCUIT, SIGNAL PROCESSING METHOD AND CONTROL PROGRAM RECORDING MEDIUM - In order to provide a means for solving a problem that it provides a signal processing circuit with small circuit area and low power consumption, a signal processing circuit includes the first multiplying means which multiplies the first signal including the first frequency component by the second signal including the second frequency component and thereby outputs the third signal, the second multiplying means which multiplies the first signal by the fourth signal of the second frequency whose phase is lagging equals to the first phase difference relative to the second signal and thereby outputs the fifth signal, the third multiplying means which multiplies the first signal by the sixth signal of the second frequency whose phase is lagging equals to the second phase difference relative to the second signal and thereby outputs the seventh signal, the first adding means which adds the third signal with the first weight, the fifth signal with the second weight and the seventh signal with the third weight respectively and a signal generating means which controls the first phase difference and the second phase difference based on a control signal and thereby outputs the second signal, the fourth signal and the sixth signal. | 06-27-2013 |
20130178180 | FRONT END MODULE - Provided is a front end module which is provided with an output terminal shared in a plurality of frequency bands and in which insertion losses are suppressed. A front end module in an embodiment includes an antenna terminal, an output terminal, and a switch for selectively connecting the antenna terminal to a first band pass filter configured to cause a signal of a first pass band to pass therethrough or a second band pass filter configured to cause a signal of a second pass band, which is different from the first pass band, to pass therethrough. The front end module may include a phase shifter arranged between the switch and the first band pass filter. | 07-11-2013 |
20130303097 | RECEIVING DEVICE AND SEMICONDUCTOR INTEGRATED CIRCUIT - In a receiving device, an oscillating section generates a local oscillating signal for performing frequency conversion of one reception target channel of channels in broadcasting in a first frequency band and channels in broadcasting in a second frequency band; a first receiving section generates a channel signal based on the local oscillating signal and a high-frequency signal in the first frequency band when the reception target channel is a channel in the first frequency band, and does not perform the generation when the reception target channel is a channel in the second frequency band; and second receiving section generates a channel signal based on the local oscillating signal and a high-frequency signal in the second frequency band when the reception target channel is a channel in the second frequency band, and does not perform the generation when the reception target channel is a channel in the first frequency band. | 11-14-2013 |
20140134967 | VIRTUAL N-BAND LNB - A system for receiving information, the system comprising a receiver being configurable to receive signals within a plurality of first frequency bands and output a second signal relating to a signal received within a selected one of the first frequency bands, a processing element adapted to receive and process a third signal being within a predetermined, second frequency band, each first frequency band being wider in frequency than the second frequency band, and an intermediate element adapted to receive the second signal, generate the third signal by selecting, from the second signal, information with a frequency within the second frequency band, and output the third signal. Thus, in satellite communication, a 2 LO LNB may be made to appear as a 4 LO LNB seen from the Modem. | 05-15-2014 |
20140335808 | METHOD AND SYSTEM FOR A CONFIGURABLE LOW-NOISE AMPLIFIER WITH PROGRAMMABLE BAND-SELECTION FILTERS - Methods and systems for a configurable low-noise amplifier with programmable band-selection filters may comprise a low-noise amplifier (LNA) with a low pass filter coupled to a first input of the LNA and a high pass filter coupled to a second input of the LNA. The low pass filter and the high pass filter may also be coupled to a signal source input. Signals may be received in a pass band of the high pass filter and a pass band of the low pass filter. Input signals in the pass band of the one filter (but not signals in the pass band of the other filter) may be amplified by coupling the one input of the LNA to ground and coupling the other filter to ground utilizing a shunt resistor. The filters may be configurable and may each comprise at least one inductor and at least one capacitor. | 11-13-2014 |
20140342681 | Providing Multiple Inductors For A Radio Tuner - A method includes receiving a desired channel indication in a radio tuner, determining a band of operation in which the channel is located, and if the channel is within a first band coupling multiple inductors into a resonant tank, and if the desired channel is within a second band coupling a single inductor into the resonant tank. | 11-20-2014 |
20150087253 | RADIO COMMUNICATION RECEIVER APPARATUS AND METHOD - A radio communication receiver apparatus is configured to process multiple radio frequency bands in a telecommunication system. The apparatus includes a plurality of digital receiver chains wherein each digital receiver chain is coupled to receive a digital representation of the multiple radio frequency bands, including a particular radio frequency band for processing by the respective digital receiver chain. Each digital receiver chain includes a digital receiver that is programmable to select a particular radio frequency band from the digital representation of the multiple radio frequency bands, and configured to down convert the selected radio frequency band into a digital baseband signal associated with the particular radio frequency band. Built in calibration is provided by operation of direct radio frequency technology. | 03-26-2015 |
20150358041 | CALIBRATION AND TUNING FOR A TUNABLE FILTER HAVING ADJUSTABLE INDUCTANCE AND CAPACITANCE - A device includes a tunable filter having an adjustable inductance and an adjustable capacitance, the tunable filter having a first tuning input responsive to a first control signal related to filter frequency band information, and a second tuning input responsive to a second control signal related to a jammer signal. | 12-10-2015 |
20180026666 | GLASS SUBSTRATE INCLUDING PASSIVE-ON-GLASS DEVICE AND SEMICONDUCTOR DIE | 01-25-2018 |
455188200 | UHF and VHF | 1 |
20090081975 | REMOVING HARMONIC AND CO-EXISTENCE INTERFERENCE IN RADIO RECEIVERS - A wireless device includes a two-stage filter that separates UHF and VHF transmission bands in such a way as to maximize cross channel isolation, so preventing cross channel signal contamination and additionally protecting all signals from host coexistence blocking transmissions and harmonics of the wanted signals without the requirement for additional or selectable filter arrangements. | 03-26-2009 |
455189100 | With plural separate mixer or converter circuits | 3 |
20100022210 | RECEIVING DEVICE AND ELECTRONIC APPARATUS USING THE SAME - In an image rejection mixer of a receiving device of the invention, when a signal of a first radio frequency band is input to input terminal, first mixer and second mixer convert the input signal of the first radio frequency band into a signal of a first intermediate frequency band by the use of a first local signal from local signal oscillation unit and a filter circuit attenuates an image disturbing signal existing in the first intermediate frequency band, and when a signal of a second radio frequency band is input to the input terminal, first mixer and second mixer convert the input signal of the second radio frequency band into a signal of a second intermediate frequency band by the use of a second local signal from the local signal oscillation unit and the filter circuit attenuates an image disturbing signal existing in the second intermediate frequency band. The first intermediate frequency band and the second intermediate frequency band are partly overlapped with each other. | 01-28-2010 |
20140323072 | METHOD AND APPARATUS FOR AN ENERGY-EFFICIENT RECEIVER - One or more circuits may comprise at least one first-type analog-to-digital converter (ADC) and at least one second-type ADC. The circuit(s) may be operable to receive a plurality of signals, each of which may comprise a plurality of channels. The circuit(s) may be operable to digitize a selected one or more of the channels. Which, if any, of the selected channels are digitized via the at least one first-type ADC and which, if any, of the selected channels are digitized via the at least one second-type ADC, may be based on which of the plurality of channels are the selected channels and/or based on power consumption of the circuit(s). A bandwidth of each first-type ADC may be on the order of the bandwidth of one of the received signals. A bandwidth of each second-type ADC may be on the order of the bandwidth of one of the plurality of channels. | 10-30-2014 |
20160094249 | APPARATUS AND METHOD FOR GENERATING BASE BAND RECEIVE SIGNALS - An apparatus for generating base band receive signals includes a first analog-to-digital converter module generating a first digital high frequency receive signal at least by sampling a first analog high frequency receive signal, a first digital signal processing module generating a first base band receive signal based on the first digital high frequency receive signal, a second analog-to-digital converter module generating a second digital high frequency receive signal at least by sampling a second analog high frequency receive signal and a second digital signal processing module generating a second base band receive signal based on the second digital high frequency receive signal. The first analog high frequency receive signal comprises first payload data at a first receive channel associated with a first carrier frequency and the second analog high frequency receive signal comprises second payload data at a second receive channel associated with a second carrier frequency. | 03-31-2016 |
455190100 | With frequency conversion | 4 |
20080280577 | RECEIVER AND INTEGRATED AM-FM/IQ DEMODULATORS FOR GIGABIT-RATE DATA DETECTION - This disclosure addresses providing gigabit-rate data transmission over wireless radio links, using carrier frequencies in the millimeter-wave range (>30 GHz). More specifically, a circuit for detection of amplitude-shift keyed (ASK) or other amplitude modulations (AM) which can be easily incorporated into an integrated circuit receiver system is described, making the receiver capable of supporting both complex IQ modulation schemes and simpler, non-coherent on-off or multiple-level keying signals. Several novel radio architectures are also described which, with the addition of a frequency discriminator network, have the capability of handling frequency shift keyed (FSK) or other frequency modulations (FM), as well as AM and complex IQ modulation schemes. These radio architectures support this wide variety of modulations by efficiently sharing detector hardware components. The architecture for supporting both quadrature down-conversion and ASK/AM is described first, followed by the ASK/AM detector circuit details, then the AM-FM detector architecture, and finally the most general AM-FM/IQ demodulator system concept and the FSK/FM detector circuit details. | 11-13-2008 |
20100210229 | IBOC broadcasting receiver - An broadcasting receiver suitable for receiving a broadcasting signal transmitted in an IBOC signal format, includes: a narrowband filtering means suitable for processing an analog broadcasting signal included in the broadcasting signal; a wideband filtering means suitable for processing a digital broadcasting signal included in the broadcasting signal; a demodulating means for demodulating the broadcasting signal; a signal level detecting means for detecting a level of the broadcasting signal; a digital determining means for determining whether the broadcasting signal includes digital broadcasting signal or not; and a filter switching means for switching filtering means for use in processing the broadcasting signal to be input to the demodulating means between the narrowband filtering means and the wideband filtering means, according to the level of the detected broadcasting signal, when the digital determining means determines that the broadcasting signal does not include the digital broadcasting signal. | 08-19-2010 |
20120083231 | TUNER - Noise in an audio output is reduced even if a mixing signal leaks to another tuner. A broadcast wave is received from a broadcast station by an antenna to which a mixing signal is mixed by a mixer to obtain an IF signal and demodulated by a demodulator. An oscillator outputs a mixing signal having a frequency difference of at least a barely audible frequency within an audio frequency band from any broadcast station center frequency allocated at a predetermined frequency spacing, the mixing signal is mixed with the signal received by the antenna, and the IF signal is obtained. | 04-05-2012 |
20140128015 | Direct Digital Conversion Tuner - A direct sampling tuner includes a low noise amplifier and an optional dynamically configurable band pass filter coupled to the lose noise amplifier. The optional filter is configured to pass a selected band of channels. The tuner further includes a relatively high accuracy, multi-bit analog-to-digital converter (“ADC”) coupled to the LNA or to the optional dynamically configurable band pass filter. The ADC operates at greater than about twice a frequency of a sampled signal. The ADC directly samples the spectrum of the selected channels at the Nyquist rate, thus avoiding image problems presented by conventional tuners. | 05-08-2014 |
455191100 | With plurality of tuned circuits | 3 |
20090036075 | MULTI-CHANNEL RADIOFREQUENCY RECEIVER - The invention relates to a multichannel radio-frequency receiver ( | 02-05-2009 |
20140057581 | MIXER HAVING FREQUENCY SELECTIVITY - In order to provide a mixer capable of extracting a high multiplication signal and which has a reception band-pass filter function, a magnetoresistance effect element is provided that includes a pinned magnetization layer, a free magnetization layer, and a non-magnetic spacer layer disposed between the pinned magnetization layer and the free magnetization layer. This allows for a frequency converter which implements a desired band-pass filter by controlling a magnetic field applied by a magnetic-field applying unit to be provided. | 02-27-2014 |
455191300 | With switching between stages | 1 |
20090181630 | RADIO FREQUENCY SWITCH CIRCUIT - A radio frequency switch circuit includes: an antenna terminal; a first and second RF terminal; a first through transistor placed between the antenna terminal and the first RF terminal; a second through transistor placed between the antenna terminal and the second RF terminal; a first shunt transistor placed between ground and the first RF terminal; a second shunt transistor placed between the ground and the second RF terminal; and a distortion compensation circuit including a reverse parallel connected MOS capacitor whose capacitance around 0 volts has voltage dependence that is convex to the minus direction, the distortion compensation circuit being operable to compensate for voltage dependence of off-capacitance around 0 volts of the first and second through transistor and the first and second shunt transistor that is convex to the plus direction. Electrical connection between the antenna terminal and the first and second RF terminal is switchable. | 07-16-2009 |