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| Number | Title | Issue Date |
| 8190117 | Mixer circuit and radio communication device using the same A mixer circuit includes a voltage-to-current converter which converts a positive phase input voltage signal and a reversed phase input voltage signal input to a first input terminal and a second input terminal into a positive phase current signal and a reversed pha... | 05/29/2012 |
| 8180313 | Mixer and transceiver having the mixer Provided are a mixer and a transceiver having the mixer. The mixer includes: an local oscillation (LO) differential signal generator converting an input LO signal into a differential signal; and a mixing unit receiving the LO differential signal as a first input and... | 05/15/2012 |
| 8121577 | Controllable input impedance radio frequency mixer The present invention is a controllable input impedance RF mixer, which when fed from a high impedance source, such as a current source, provides a high quality factor (Q) impedance response associated with an impedance peak. The high-Q impedance response may be use... | 02/21/2012 |
| 8112059 | Mixer circuit, integrated circuit device and radio frequency communication unit A mixer circuit comprises an input stage arranged to convert an input voltage signal received at an input of the mixer circuit into at least one current signal, and a frequency conversion stage comprising at least one switching element arranged to convert a signal c... | 02/07/2012 |
| 8112058 | Miniaturized dual-balanced mixer circuit based on a double spiral layout architecture A miniaturized dual-balanced mixer circuit based on a double spiral layout architecture is proposed, which is designed for use to provide a frequency mixing function for millimeter wave (MMW) signals, and which features a downsized circuit layout architecture that a... | 02/07/2012 |
| 8086209 | Method and apparatus for frequency mixing of radio frequency signals A mixer such as an I/Q mixer, having an amplifier having first and second inputs and an output. The first input corresponding to, for example, an I input, and the second input corresponding to, for example, a Q input. The mixer also including a multiple way (M-way) ... | 12/27/2011 |
| 8064870 | Miniaturized dual-balanced mixer circuit based on a trifilar layout architecture A miniaturized dual-balanced mixer circuit based on a trifilar layout architecture is proposed, which is designed for use to provide a frequency mixing function for millimeter wave (MMW) signals, and which features a downsized circuit layout architecture that allows... | 11/22/2011 |
| 8064871 | Miniaturized dual-balanced mixer circuit based on a multilayer double spiral layout architecture A miniaturized dual-balanced mixer circuit based on a multilayer double spiral layout architecture is proposed, which is designed for use to provide a frequency mixing function for millimeter wave (MMW) signals, and which features a downsized circuit layout architec... | 11/22/2011 |
| 8050649 | Downconversion mixer with IM2 cancellation A downconversion mixer with IM2 cancellation includes a mixer, an IM2 generator, and a scaling unit. The mixer frequency downconverts an input RF signal with an LO signal and generates an output baseband signal. The IM2 generator includes first and second field effe... | 11/01/2011 |
| 8023923 | Mixer circuit The invention relates to a mixer circuit 31 comprising a down-conversion mixing component 33 arranged for down-converting an input radio frequency signal Irf+, Irf−. In order to improve such a mixer circuit, it is proposed that it comprises in additi... | 09/20/2011 |
| 7962116 | Mixer gain calibration method and apparatus A receiver includes a Gilbert cell mixer comprising an input transconductance stage. The input transconductance stage includes first and second transistors receiving an input signal and providing a first gain characteristic that is substantially non-linear over an o... | 06/14/2011 |
| 7917119 | Band control apparatus, band control program and band control method A band control apparatus, a band control program and a band control method that control bands takes the cost into consideration. A band control apparatus 1a for relaying signals by using at least one of a plurality of lines 2a, 2 | 03/29/2011 |
| 7904050 | Mixer apparatus having switchable local oscillator inputs A mixer apparatus (60), such as an integrated circuit (IC) mixer is provided for improving the physical layout of devices containing mixers. The mixer includes a multiplier (62) with an input port (64), an output port (66), a first switch... | 03/08/2011 |
| 7856222 | Integrated balun and coupler transformer Integrated balun and coupler is described. In one example, a radio frequency (RF) device includes a balun and coupler. The balun includes a first winding and a second winding arranged on a magnetic core. Respective inputs of the first winding and the second winding ... | 12/21/2010 |
| 7809348 | Compensating circuit for a mixer stage A compensating circuit for a mixer stage is provided, wherein the mixer stage has an input stage to which an input signal for mixing can be applied and has, following the input stage, a switching stage for mixing a differential input signal—obtained from the input... | 10/05/2010 |
| 7796968 | Frequency conversion circuit A frequency conversion circuit comprises an input stage composed of one or more transistors, the input stage outputting a current corresponding to a voltage-type RF signal which is input to the gate of the transistor; a frequency conversion stage receiving an LO sig... | 09/14/2010 |
| 7764941 | Radio communications apparatus A bit error rate of the reception signal is detected on the reception side, such that an n optimal modulation method and LO output power are determined in accordance with this bit error rate, and an LO output changing instruction is sent to an image signal rejection... | 07/27/2010 |
| 7738852 | Low noise mixer Disclosed is a mixer comprising: a switching circuit, having a first pair of differential signal nodes and a second pair of differential signal nodes, for switching according to a local oscillation signal; an amplifying stage circuit, for receiving an input signal a... | 06/15/2010 |
| 7606551 | Mixer circuit with balanced frequency mixer with varactor diodes In a mixer circuit with a balanced frequency mixer with varactor diodes, a first input signal that exhibits a first input frequency can be fed to the frequency mixer via a first input. Furthermore, a second input signal that exhibits a second input frequency can be ... | 10/20/2009 |
| 7606550 | Method and system for a dual mode receiver with low intermediate frequency (IF) and zero second IF In RF transceivers, a method and system for a dual mode receiver with low intermediate frequency (IF) and zero second IF are provided. An RF receivers may be adapted to operate in a low IF down conversion mode or a baseband down conversion mode. A control signal may... | 10/20/2009 |
| 7580693 | Passive reflection mixer In one aspect, a mixer that provides improved isolation between an input oscillator and a mixing cell. In another aspect, a mixer that includes circuitry operative to shape an input signal provided by a local oscillator. ... | 08/25/2009 |
| 7570936 | Sub-harmonically pumped mixer A mixing circuit is described in connection with various embodiments. ... | 08/04/2009 |
| 7565128 | High performance low noise amplifier A signal processing circuit is proposed, which is intended to receive a pair of input signals Sp and Sn in phase opposition on two input terminals and to provide two pairs of output currents SIp and SIn in phase opposition on four output terminals. Each input signal... | 07/21/2009 |
| 7522903 | Three-phase mixer-system Three-phase mixer-systems comprising at least three groups of mixers (1-4,5-8,9-12,30) for frequency translating signals are (basic idea) provided with balancing means (13-21,31) for suppressing certain mixing products with ... | 04/21/2009 |
| 7509111 | Integrated circuit having a mixer circuit Integrated circuit including a mixer circuit, which has a first circuit section, a second circuit section, and a transformer. The first circuit section has two radiofrequency terminals. The second circuit section has two reference oscillator terminals, an active mix... | 03/24/2009 |
| 7496343 | Programmable mixer for reducing local oscillator feedthrough and radio applications thereof A state of a programmable mixer is set during a calibration phase to minimize local oscillator feedthrough. During a calibration phase, inputs to the programmable mixer are set to zero, or to a known state and the local oscillator is set to a calibration frequency. ... | 02/24/2009 |
| 7440742 | Mixer gain calibration method and apparatus A gain calibration circuit comprises a generator that generates a constant overdrive voltage that biases a radio frequency (RF) mixer. A reference signal generator generates a reference signal. A comparator receives the reference signal and a second signal that is a... | 10/21/2008 |
| 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 with a large amplitude of local signals. Accordingly, the performance... | 08/26/2008 |
| 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 T1 to T6. At least one of the transistors has parallel connections of two or more transistors. By arbitrarily setting the number of parallel connections of the transistor... | 08/26/2008 |
| 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 connect and disconnect an adjust capacitor series to the load inductors. By... | 08/19/2008 |
| 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 the differential transformer, a frequency divider which divides the hig... | 07/01/2008 |
| 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 selectively coupled auxiliary current source to inject an auxiliary current... | 06/24/2008 |
| 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 mixing an input signal with a local signal. The frequency conversion... | 06/03/2008 |
| 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 gates coupled to one output terminal, a third and fourth transistor wi... | 05/27/2008 |
| 7372354 | Detector circuit to be used for measuring current A detector circuit to be used for measuring current and including a main current transformer and two substantially identical auxiliary current transformers, where magnetomotive forces are induced by a main current, said magnetomotive forces being counteracted by mag... | 05/13/2008 |
| 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 transformer. The differential PA has a differential PA output with a PA dif... | 05/06/2008 |
| 7369835 | Image rejection mixer providing precision image rejection An image rejection mixer includes a first mixer, a second mixer, a first output adjust circuit, and a second output adjust circuit. The first mixer is coupled to receive an input RF signal and a local oscillator signal and includes a first mixer stage and a first ou... | 05/06/2008 |
| 7369837 | Frequency-mixing method and frequency-mixing device using the same A frequency-mixing method includes a step of generating a first quadrature signal having a predetermined frequency, a second quadrature signal having a phase difference of about 180 degrees with respect to a phase of the first quadrature signal, a third quadrature s... | 05/06/2008 |
| 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 and a programable gain low noise amplifier. Frequency conversion circu... | 04/29/2008 |
| 7366484 | Systems and methods for adjusting the bias level of a mixer in a transmitter A mixer having dynamic biasing, comprises a mixer configured to receive a local oscillator (LO) reference signal and a radio frequency (RF) data signal, and a bias control circuit configured to reduce bias current from the mixer under a low power condition. ... | 04/29/2008 |
