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7418251 Compact radio frequency harmonic filter using integrated passive device technology  
A radio frequency (“RF”) harmonic filter circuit as disclosed herein is fabricated using integrated passive device (“IPD”) technology. The RF harmonic filter circuit is configured to...
7418250 Quadrature mixer circuits and mobile terminal using the same  
Because there are different voltages at two current output terminals of a current divider, the voltages at the current input terminals of two current switch circuits are not affected mutually even...
7417486 Voltage-current conversion circuit, amplifier, mixer circuit, and mobile appliance using the circuit  
A cross-coupled low-distortion voltage-current conversion circuit has transistors T 1 to T 6 . At least one of the transistors has parallel connections of two or more transistors. By arbitrarily...
7415286 Gain boosting for local oscillation distribution circuitry  
A multi-band integrated circuit radio transceiver comprising receive and transmit radio front end circuit blocks further includes a local oscillation generator for generating a local oscillation...
7415262 Wireless access point power control  
An access point in a wireless network receives link margin values from associated access points. The access point determines sensitivity values for the associated access points and determines a...
7415261 Systems and method for a highly linear, low power mixer  
A mixer for use in a transceiver comprises an LO switching pair and a folded transconductor. The mixer can be used as an upconversion or down conversion mixer and provides increased headroom and...
7415257 Dual-band mixer and its design flow  
In the dual-band mixer of this invention, a current combined load is presented and is shared by two separate working frequency bands. In the invented dual-band mixer, a switch is provided to...
7415256 Received signal strength measurement circuit, received signal strength detection circuit and wireless receiver  
The RSSI circuit of the present invention includes: an IF amplifier section, which includes multiple stages of serially connected differential amplifiers for amplifying, with use of a current...
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...
7409190 Radio-frequency circuit module and radio communication apparatus  
An integrated-circuit element and passive components are mounted on a front face of a multilayer substrate. A capacitor constituting a crystal-oscillator circuit is disposed inside the multilayer...
7403758 Linearized and balanced mixer apparatus and signal mixing method  
Method and apparatus are provided for linearized balanced signal mixing. A signal mixing circuit ( 10 ) for translating a radio frequency (RF) signal is provided comprising an input amplifier ( 12...
7398075 Radio wave reception device and radio wave clock  
In a radio wave reception device and a radio wave clock capable of receiving multiple frequencies, an intermediate frequency signal whose frequency is fixed can be output while a signal output from...
7395098 Bias filtering module including MOS capacitors  
A bias filtering module with at least two capacitive levels satisfies both a settle time requirement and a filtering requirement using a voltage dependent filter module whose capacitance is a...
7395040 Multiple band multiple input multiple output transceiver integrated circuit  
A MIMO transceiver integrated circuit (IC) includes a plurality of multiple band direct conversion transmitter sections, a plurality of multiple band direct conversion receiver sections, and a...
7392033 Reducing active mixer flicker noise  
A mixer is disclosed that includes first and second transconductance modules that, in one embodiment, includes MOSFETs configured to receive a plurality of signals that are to be mixed and a...
7389098 Heterodyne receiver for low noise and image frequency repression  
Disclosed is a heterodyne receiver for low noise and image frequency repression, comprising: a low noise amplifier for receiving an input signal from an antenna and amplifying the signal while...
7389095 Variable frequency clock generator for synchronizing data rates between clock domains in radio frequency wireless communication systems  
A system, method and system are disclosed for using a variable frequency clock generator to synchronize an average data rate over intervals of time in a variable clock domain to make it equal to a...
7386293 Receiving circuit  
In a receiving circuit, an antenna 11 receives a high-frequency signal at a predetermined frequency band, a level changing section 13 changes a signal level of the high-frequency signal...
7386290 RX dual-band mixer  
A dual-band input transceiver block is formed to operably receive one of a 2.4 GHz radio frequency signal or a 5.0 GHz radio frequency transceiver signal in a manner that minimizes duplication of...
7386289 Microwireless integrated environmental sensor and transmitter system  
The invention is a microminiature wireless environmental sensor that has integrated both sensor and transmitter functions into one function. The basic operating principle for the device is that...
7383058 RF/microwave system with a system on a chip package or the like  
A transceiver system on a single package provides an RF/Microwave subsystem in an area external to the processor die which contains a digital processor. The external area may include an...
7383034 Frequency conversion circuit, modulation circuit, polar modulation transmitting circuit, quadrature modulation transmitting circuit, communication instrument, and frequency conversion method  
A frequency conversion circuit is provided capable of suppressing noise converted from about a frequency twice as large as a local signal to a reception band frequency, which performs modulation by...
7379728 Wireless communication system  
A wireless communication system includes: a filter; and a semiconductor chip including a signal processing integrated circuit having an amplifier, wherein a main surface of the semiconductor chip...
7379727 RF front-end receiver  
An RF front-end receiver comprises a low noise amplifier and a local oscillator driver, which are connected to respective input ports of a mixer which comprises a first and second transistor with...
7376403 Terahertz radiation mixer  
A terahertz radiation mixer comprises a heterodyned field-effect transistor (FET) having a high electron mobility heterostructure that provides a gatable two-dimensional electron gas in the channel...
7376400 System and method for digital radio receiver  
A communications system comprising a processor, a variable oscillator, a radio frequency (RF) quadrature demodulator, a variable capacitor, a continuous-time, sigma-delta analog-to-digital...
7369828 Electronically tunable quad-band antennas for handset applications  
An electronically tunable quad-band antenna which includes a tunable high band antenna tuned by at least one tunable varactor associated therewith; the tunable high band antenna further includes a...
7369096 Impedance matched passive radio frequency transmit/receive switch  
A Radio Frequency (RF) structure services an antenna having a characteristic impedance and includes a differential Power Amplifier (PA), a differential Low Noise Amplifier (LNA), and a balun...
7359694 Carbon nanotube devices and method of fabricating the same  
An RF mixer includes a diode quad including first, second, third and fourth carbon nanotube diodes, each carbon nanotube diode including a p-n junction The mixer also includes a RF input coupled...
7359686 Radio-frequency amplifier system  
A device for measuring voltage levels includes a root mean square (RMS) detector. The RMS detector includes a linear multiplier, a log converter, a low-pass filter and a temperature compensator....
7356325 Local oscillation routing plan applicable to a multiple RF band RF MIMO transceiver  
Local oscillation circuitry for use in an RF transceiver Integrated Circuit (IC) includes local oscillation generation circuitry operable to produce a local oscillation and local oscillation...
7348846 Amplifier arrangement  
The present invention relates to an amplifier arrangement having a plurality of amplifier stages that form a series circuit. Each amplifier stage comprises a current mirror, the translation ratio...
7345545 Enhancement mode transceiver and switched gain amplifier integrated circuit  
Methods and apparatus are provided for RF switches ( 504, 612 ) integrated in a monolithic RF transceiver IC ( 500 ) and switched gain amplifier ( 600 ). Multi-gate n-channel enhancement mode FETs...
7343146 Single chip LNA and VCO having similar resonant circuit topology and using same calibration signal to compensate for process variations  
In one aspect this invention provides a radio frequency receiver for coupling to an antenna. The receiver includes a downconversion mixer, an amplifier having an input coupled to the antenna and an...
7333791 Use of an image reject mixer in a forward data channel tuner  
Disclosed are systems and methods which utilize an image reject mixer in an out-of-band mixer application such as in a forward data channel frequency converter. For example, according to a...
7327198 Method and system for a polyphase clock for a second intermediate frequency (IF) mixer to improve signal quality  
Methods and systems for reducing interference in a signal are disclosed herein. Aspects of the method may comprise generating a first local oscillator signal. The generated first local oscillator...
7324796 Low temperature co-fired ceramic sub-harmonic mixer  
A sub harmonic mixer has improved electrical performance in a small package size. The mixer has a low temperature co-fired ceramic substrate. Coupled lines are located within the substrate and...
7324791 Low-noise differential bias circuit and differential signal processing apparatus  
A low-noise differential bias circuit is provided which obtains excellent noise characteristics while ensuring excellent distortion characteristics. A collector of a transistor Q 11 is connected...
7315192 CMOS-based receiver for communications applications  
A receiver and receiver front end having multiple independent differential inputs, multiple independent differential low-noise amplifiers, and two sets of double-balanced IQ mixers. The...
7313369 Communication semiconductor integrated circuit and radio communication system  
A communication semiconductor integrated circuit has an oscillator circuit forming part of a transmission PLL circuit fabricated on a single semiconductor chip together with an oscillator circuit...
7310508 Inline filter resistors  
A shorted resistive block formed in line with at least one trace of a plurality of a top metal layer includes a plurality of resistors with a removable shorting link coupled across the resistive...
7305223 Radio frequency circuit with integrated on-chip radio frequency signal coupler  
A radio frequency (“RF”) circuit configured in accordance with an embodiment of the invention is fabricated on a substrate using integrated passive device (“IPD”) process technology. The RF...
7305222 Radio frequency integrated circuit having reduced receiver noise levels  
A radio frequency integrated circuit (RFIC) includes a digital to analog converter, an analog to digital converter, and a radio module. The digital to analog converter (DAC) is operably coupled to...
7302247 Spread spectrum isolator  
A circuit package includes first and second units containing functional circuitry. At least one RF isolation link interconnects the first and second units and provides voltage isolation between the...
7299029 Method of operating radio receiver implemented in a single CMOS integrated circuit  
A single chip superhetrodyne AM receiver is disclosed herein. To compensate for process variations in the implementation of the IC, bias currents setting the operating conditions for various...
7299028 Low power, low noise figure, latch driver circuit  
A latch driver circuit is provided as a local oscillator driver for driving a passive mixer of an RF receiver. The driver circuit includes a differential amplifier stage coupled to a supply and a...
7299018 Receiver comprising a digitally controlled capacitor bank  
Receiver comprising an RF input filter including a digitally controlled capacitor bank with n capacitors being controlled by a tuning control signal for varying the tuning frequency of the RF input...
7295826 Integrated frequency translation and selectivity with gain control functionality, and applications thereof  
Methods and apparatuses for frequency selectivity and frequency translation, and applications for such methods and apparatuses, are described herein. The method includes steps of filtering an input...
7292828 Miniaturized multichannel transmitter and wireless telemetry system  
A multichannel wireless telemetry system is disclosed. The system includes a transmitter and a receiver in communication with the transmitter. The transmitter includes a signal processing chip. The...
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...
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