Class / Patent application number | Description | Number of patent applications / Date published |
455280000 | With coupling to a stage of the receiver | 27 |
20080318542 | DUAL RECEIVE FILTER - A stage is provided for a receiver of a wireless device. The stage comprises a matching network that separates amplified signals of interest received from an amplifier from amplified unwanted signals received from the amplifier in conjunction with additional downstream filters. The stage also comprises a signal path that comprises components for receiving and processing the amplified signals of interest, and a shunt path that comprises components for adjusting reflected energy sent back to the amplifier for limiting the output swing of the amplifier in a frequency band corresponding to the amplified unwanted signals. | 12-25-2008 |
20100304701 | APPARATUS AND METHOD FOR REMOVING TRANSMISSION LEAKAGE SIGNAL - An apparatus and method for removing a transmission leakage signal are provided. The apparatus includes: a directional coupler connecting an antenna to a transmission path and a reception path; and a reflection coefficient adjustment unit outputting a reflection signal to the reception path, the reflection signal having the same amplitude as and opposite phase to a first transmission leakage signal generated from the transmission path and input to the reception path and a second transmission leakage signal reflected by the antenna and input to the reception path. | 12-02-2010 |
20110081879 | AMPLIFIER CIRCUIT AND COMMUNICATION DEVICE - There is provided an amplifier circuit including: a first transistor having a source thereof connected to an input port and having a gate thereof grounded; a second transistor having a gate thereof grounded; a first inductor provided between a drain of the first transistor and a source of the second transistor; and a second inductor provided between a drain of the second transistor and an output port. | 04-07-2011 |
20130260708 | POWER RECOVERY CIRCUIT BASED ON PARTIAL STANDING WAVES - A power recovery system includes a transmission line that is coupled to transfer an RF signal received via an antenna. The RF signal generates a partial standing wave in the transmission line and the transmission line has at least one standing wave anti-node. A power recovery circuit converts an anti-node signal from the at least one standing wave anti-node to a power signal. | 10-03-2013 |
20160087665 | DEVICE AND METHOD FOR SWITCHABLY ROUTING DOWN-CONVERTED RF SIGNALS - A device for switchably routing down-converted radio frequency (RF) signals from a plurality of inputs to a plurality of outputs, and a method of operating the same. The device includes a respective switch for each output. The device also includes an interconnect arrangement. The interconnect arrangement includes a respective transmission line for each input. Each transmission line includes a plurality of branches for routing a down-converted RF signal received at the input of that transmission line to the switch of each output. The switch of each output is operable selectively to connect one of the transmission lines to its output. The interconnect arrangement also includes a plurality of cross-over points at which two of the branches cross over each other. | 03-24-2016 |
20160197607 | RADIO FREQUENCY SWITCH | 07-07-2016 |
455281000 | Having distributed parameters | 1 |
20080200141 | Receiver - A compact receiver which is easy in adjustment of a reference signal level is provided. A receiver having an antenna for receiving a wireless signal, a single pole single through switch which passes a signal received via the aforesaid antenna and outputs the signal when a first control signal is in a first state, and connects a signal received via the aforesaid antenna to a reference potential when the first control signal is in a second state, and a difference circuit which outputs a difference signal of an output signal of the aforesaid single pole single through switch when the first control signal is in the first state and an output signal of the aforesaid single pole single through switch when the first control signal is in the second state is provided. | 08-21-2008 |
455283000 | Undesired signal or noise control (e.g., antistatic) | 5 |
20110065405 | METHOD OF CANCELING NOISE CONTAINED IN RECEIVED SIGNAL - A multiplication section multiplies a signal output from a GPS antenna by a local oscillation signal generated by a local oscillation signal generation section to down-convert the signal output from the GPS antenna into an intermediate-frequency signal. A sampling circuit section samples a generated signal generated by a portable electronic circuit using a sampling clock signal having a frequency lower than a frequency of the generated signal. An attenuation section generates a cancellation signal by attenuating the sampled signal, and an addition section adds the cancellation signal to the signal output from the multiplication section to cancel in-band noise superimposed on the received signal. | 03-17-2011 |
455284000 | Balancing or cancelling | 1 |
20090093228 | DC Offset Cancellation Circuits and Methods - Embodiments of the present invention include circuits and methods for reducing DC Offset. In one embodiment the present invention includes storing DC offset on internal capacitances. In one embodiment, parallel stages are used to remove DC offset corresponding to different local oscillator frequencies. Embodiments of the invention further include changing the low cutoff frequency of the DC cancellation circuits for fast calibration. In a first state, a high pass filter may have a first low cutoff frequency, and in a second state the high pass filter may have a second cutoff frequency lower than the first low cutoff frequency. The present invention also includes a variable gain amplifier with reduced DC offset. | 04-09-2009 |
455285000 | With image frequency suppression | 2 |
20100297973 | ORTHOGONALITY COMPENSATING DEVICE, RADIO RECEIVING DEVICE, ORTHOGONALITY COMPENSATING METHOD, AND NON-TRANSITORY COMPUTER READABLE MEDIUM - Provided is an orthogonality compensating device that compensates for orthogonality between a real signal and an imaginary signal of complex digital intermediate frequency signals, the orthogonality compensating device including: a first processing unit that outputs a first signal obtained by calculating one of the real signal and the imaginary signal by using a first coefficient and a second coefficient; and a coefficient specifying unit that specifies the first coefficient such that the first signal has the same amplitude as the other of the real signal and the imaginary signal, and specifies the second coefficient such that the first signal is orthogonal to the other of the real signal and the imaginary signal, by using the first signal and the other of the real signal and the imaginary signal. | 11-25-2010 |
20100297974 | ORTHOGONALITY COMPENSATING DEVICE, RADIO RECEIVING DEVICE, ORTHOGONALITY COMPENSATING METHOD, AND NON-TRANSITORY COMPUTER READABLE MEDIUM - Provided is an orthogonality compensating device that compensates for orthogonality between a real signal and an imaginary signal of complex digital intermediate frequency signals, the orthogonality compensating device including: a detector that outputs a detection result indicating whether the complex digital intermediate frequency signals include an image frequency signal; a first processing unit that outputs a first signal obtained by adding a first scalar signal obtained by multiplying the imaginary signal by h | 11-25-2010 |
455286000 | Wave filter, coil, or wave trap | 1 |
20160006098 | WAVEGUIDE-TYPE IMAGE REJECTION FILTER AND SINGLE-SIDEBAND RECEIVER, FREQUENCY DIVIDER, AND SIDEBAND-SEPARATING RECEIVER USING THE SAME FILTER - An image rejection filter comprising a waveguide-type 90-degree hybrid coupler having an input port for receiving an input signal within a millimeter or submillimeter band, first and second output ports for dividing the input signal in two and outputting the divided signals, respectively, wherein the one signal deviates by a 90-degree phase from the other signal, and a branch port for outputting the signal; a pair of band pass filters: a waveguide-type first band pass filter whose one end is connected with the first output port and a waveguide-type second band pass filter whose one end is connected with the second output port; and a pair of radiowave absorptive terminations: a first radiowave absorptive termination connected to the other end of the first band pass filter and a second radiowave absorptive termination connected to the other end of the second band pass filter. | 01-07-2016 |
455289000 | With coupling varying, regulating, or control | 2 |
20090156151 | Wireless Portable Device Including Internal Broadcast Receiver - The invention relates, inter alia, to a wireless portable device for radio communication, comprising at least one antenna element ( | 06-18-2009 |
20120157030 | SIGNAL RECEPTION APPARATUS AND METHOD FOR IMPLEMENTATION THEREOF - The present invention discloses a signal reception apparatus and a method for implementation thereof. The apparatus comprises: a personal computer interface, configured to implement the communications between a personal computer and the signal reception apparatus; an antenna module, configured to receive signals of a base station; and an antenna interface, configured to implement the communications between a terminal and the signal reception apparatus, so as to provide the signals received by the antenna module to the terminal. The present invention improves the signal reception effect of the terminal. | 06-21-2012 |
455293000 | Specified stage (e.g., mixer, amplifier, or demodulator) | 13 |
20080268805 | High Linearity Passive Mixer and Method Thereof - A high linearity mixer circuit includes a commutation network comprising four switches to provide an electrical coupling between a first pair of circuit nodes and a second pair of circuit nodes, whereas the coupling has two states and is controlled by a pair of complementary logical signals. The mixer circuit further comprises a first pair of current-sourcing devices coupled to the first pair of circuit nodes and a second pair of current-sourcing devices coupled to the second pair of circuit nodes. The mixer circuit further includes a pair of capacitors to provide AC coupling, either between the first pair of circuit nodes and a first external circuit, or between the second pair of circuit nodes and a second external circuit. | 10-30-2008 |
20080287085 | RF front-end for a radar system - An RF sender/receiver front-end is disclosed comprising a terminal for receiving an oscillator signal, at least one distribution unit for distributing the oscillator signal into different signal paths, two or more mixer-arrangements for sending a transmit-signal or for receiving an receive-signal, where each mixer-arrangement comprises a mixer and an amplifier for amplifying the oscillator signal and generating the transmit-signal. | 11-20-2008 |
20110207425 | MULTI-GIGABIT MILLIMETER WAVE RECEIVER SYSTEM AND DEMODULATOR SYSTEM - A receiver system and a demodulator system are configured to receive and demodulate, respectively, multi-gigabit millimeter wave signals being wirelessly transmitted in the unlicensed wireless band near 60 GHz. | 08-25-2011 |
20110294452 | ANTENNA AMPLIFIER DEVICE AND ANTENNA DEVICE PROVIDED IN MOBILE OBJECT - Even when an input is weak, an antenna amplifier device may achieve a high sensitivity while reducing a noise factor (NF). The antenna amplifier device includes an amplification circuit | 12-01-2011 |
20110294453 | EFFICIENT SAMPLING AND RECONSTRUCTION OF SPARSE MULTI-BAND SIGNALS - A method for signal processing includes distributing an analog input signal to a plurality of processing channels. In each processing channel, the input signal is mixed with a respective periodic waveform including multiple spectral lines, so as to produce a respective baseband signal in which multiple spectral slices of the input signal are superimposed on one another. The baseband signal produced in each of the processing channels is digitized, to produce a set of digital sample sequences that represent the input signal. | 12-01-2011 |
20120094625 | DETECTING UNAUTHORISED RADIO COMMUNICATIONS DEVICES - A method for detecting unauthorised radio communications devices, the method including the steps of filtering received radio frequency signals into desired signals having a frequency band characteristic of an unauthorised radio communications device and undesired signals having a different frequency band characteristic of an authorised radio communications device, comparing respective levels of the desired and undesired signals with respective predetermined threshold levels, and generating detection signals indicative of the presence of the unauthorised radio communications device only if the desired signals exceed their predetermined threshold level and the undesired signals do not exceed their predetermined threshold level, thereby passively discriminating between the authorised and unauthorised radio communications devices, and interference therebetween. | 04-19-2012 |
20120142300 | COMMUNICATION DEVICE INCLUDING MULTIPLE LO RECEIVERS - Some embodiments of the present disclosure relate to multiband receivers that include at least one divider unit having a divisor that is other-than-two. For example, in some embodiments the divisor is an odd integer (e.g., three). Such divisors allow oscillators for respective receiver subunits in a multi-band receiver to have frequencies that are sufficiently different from one another so as to limit cross-talk interference there between, even when the receiver subunits are concurrently receiving data on adjacent channels. To facilitate this other-than-two divisor, a phase error compensation block is often used to compensate for the effects of using the other-than-two divisor. | 06-07-2012 |
20120171980 | Amplifier with On-Chip Filter - An integrated circuit for a radio receiver comprising a radio-frequency amplifier and a radio-frequency filter is described. The amplifier receives radio-frequency signals from an antenna, the filter is connected to the amplifier output, and the output of the filter is provided to a processing stage of the receiver. The amplifier comprises an amplifying stage controlled by a radio-frequency input signal and a signal fed back from the filter. The amplifier input impedance is substantially matched to the antenna impedance at a frequency band of interest. The signal fed back from the filter providing attenuation of signals outside the frequency band of interest at the amplifier input. The filter comprises one or more filter components. A filter component comprises a first input and a second input for receiving the amplifier output, a first switch arranged to selectively connect the first input to a first impedance, a second switch arranged to selectively connect the first input to a second impedance, a third switch arranged to selectively connect the second input to the first impedance, and a fourth switch arranged to selectively connect the second input to the second impedance. The first and fourth switches are controlled by a first oscillator signal and the second and third switches are controlled by a second oscillator signal that is 180° out of phase with the first oscillator signal. | 07-05-2012 |
20120295564 | GENERAL RECEIVER DEVICE WITH ADAPTIVE FILTER - A general receiver device with adaptive filter includes an antenna, a low noise amplifier, a bandpass tracking filter, a single-ended-to-differential converter unit, a mixer, and an adaptive filter. The antenna receives an RF signal. The low noise amplifier amplifies the RF signal for generating an amplified RF signal. The band-pass tracking filter filters the amplified RF signal for generating a filtered RF signal. The single-ended-to-differential converter unit converts the filtered RF signal into a differential RF signal. The mixer receives a differential local oscillation signal and uses the differential local oscillation signal to down-convert the differential RF signal into a differential IF signal. The adaptive filter filters the differential IF signal for generating a filtered differential IF signal. | 11-22-2012 |
20130017798 | Universal Demodulation and Modulation for Data Communication in Wireless Power Transfer - The present invention provides a universal demodulation circuit, a load modulation circuit and associated method, and an associated power transfer system, all suitable for use in wireless power transfer. A power receiver with signal strength detection is also provided. Modulation of the impedance of the demodulation circuit is determinable by detecting the amplitudes of a first and a second electrical parameter, thereby demodulating data communicated by modulation of the impedance of the demodulation circuit. The modulation circuit has a communication modulator to modulate the impedance of the modulation circuit, to a predetermined minimum modulation depth, thereby to communicate data. | 01-17-2013 |
20130183920 | RESIDUAL SIGNAL GENERATING CIRCUIT, SUCCESSIVE APPROXIMATION AD CONVERTER, PIPELINED AD CONVERTER, AND RADIO RECEIVER - There is provided with a residual signal generating circuit in which the capacitive DA converter generates a first difference signal with respect to an input signal based on a criterion voltage, the criterion voltage being indicative of an input range of the input signal, the reference voltage generating circuit divides the criterion voltage to obtain at least one partial voltage signal, the residual signal generating section generates 2 | 07-18-2013 |
20130303102 | DIFFERENTIAL LOOPSTICK ANTENNA CONFIGURATION - A long-wave or medium-wave receiver receives a first signal from a first terminal of a loopstick antenna on a positive antenna input terminal of the receiver and receives a second signal from a second terminal of the loopstick antenna on a negative antenna input terminal of the receiver. The first and second signals are processed differentially in the receiver. The receiver may optionally be configured to operate in either a differential mode or a single-ended mode by setting switches to selectively connect one of the antenna input terminals to ground in single-ended mode. | 11-14-2013 |
20140171005 | LOW-NOISE TIA-TO-ADC INTERFACE WITH A WIDE-RANGE OF PASSIVE GAIN CONTROL - A circuit for a low-noise interface between an amplifier and an analog-to-digital converter (ADC) may comprise a capacitor element having a capacitance of C coupled between a first and second output node of the amplifier. A first resistor R | 06-19-2014 |