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| Number | Title | Issue Date |
| 7437137 | Mixer system A mixer system includes a multi-phase signal generator, a mixer, and a mixer control circuit. The multi-phase signal generator generates a plurality of mixer input signals, where each has a frequency equal to the others, and a phase, and where the phases are distrib... | 10/14/2008 |
| 7437134 | Tuner arrangement A tuner arrangement is provided comprising one or more tuners. Each tuner has two or more frequency changers, each comprising a mixer and a local oscillator. A controller controls the local oscillators in response to receipt of a channel select request. The controll... | 10/14/2008 |
| 7421260 | Method and system for a second order input intercept point (IIP2) correction In RF transceivers, a method and system for a second order input intercept point (IIP2) correction are provided. A DC offset sensor may detect DC offset voltages produced by blocker signals in “I” and “Q” signal component paths in an RF receiver. The ... | 09/02/2008 |
| 7418237 | Electric circuit and transmission method for telemetric transmission The invention relates to an electric circuit for a telemetric transmission. A semiconductor transistor switch switches a quenching circuit into an electrically conductive state to prevent oscillation of a resonance circuit. The semiconductor transistor switch switch... | 08/26/2008 |
| 7363017 | High frequency module and manufacturing method thereof A high frequency module used as a unit circuit making up a phased array antenna, in which the module may be reduced in size with reduction in cost. A high frequency module 10 includes a dielectric substrate 1 having both surfaces metallized. The dielec... | 04/22/2008 |
| 7363019 | Shaping the drive signal of a mixing device Techniques for shaping the drive signal of a mixing device to overcome a characteristic capacitance of the control terminal of the mixing device and reduce the time the mixing device is in an intermediate state between its on and off states. ... | 04/22/2008 |
| 7336940 | Frequency conversion techniques using antiphase mixing A frequency upconverter using mixers operating on one or more signals and inverted versions thereof and a subtractor, such as a balun, for subtractively combining the mixer outputs to produce an upconverted signal. ... | 02/26/2008 |
| 7323950 | Balanced hybrid coupler network An electrical processing network including a first set of ports and a second set of ports electrically coupled to the first set of ports. The first set of ports are for a first set of signals with approximately 0° and 180° relative phase. The second set of ports a... | 01/29/2008 |
| 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 connected to an LO port, an RF port and an intermediate frequency port. T... | 01/29/2008 |
| 7324798 | 2-order sub-harmonic frequency modulator having high carrier suppression ratio and direct conversion transmitter using the same Disclosed herein is a 2N-order sub-harmonic frequency modulator and direct conversion transmitter using the same. The direct conversion transmitter includes a digital modulation unit, a D/A conversion unit, a DC correction and low pass filter unit, a loca... | 01/29/2008 |
| 7289167 | Television tuner including distribution connectors A metal frame body has first to fourth side plates and is divided, by a shield plate provided in the metal frame body, into a first compartment area near the first side plate and a second compartment area near the second side plate. A distributor is arranged in the ... | 10/30/2007 |
| 7273766 | Variable density and variable persistent organic memory devices, methods, and fabrication An organic memory device comprising two electrodes having a selectively conductive decay media between the two electrodes provides a capability to control a persistence level for information stored in an organic memory cell. A resistive state of the cell controls a ... | 09/25/2007 |
| 7268836 | Television tuner device generating intermediate-frequency signal free from harmonic interference of reference signal A television tuner device includes a metal frame, including a shielding plate which separates the space defined by the metal frame into a first chamber at a first side plate and a second chamber at a second side plate opposite to the first side plate; a distribution... | 09/11/2007 |
| 7266348 | Tire air pressure detection system A tire air pressure detection system, able to prevent a strong electric field or strong radio interference from affecting transmitters and causing mistaken data relating to tire air pressure to be sent out and a driver from being mistakenly warned, having transmitte... | 09/04/2007 |
| 7263344 | Method for reducing IM2 noise in a down conversion circuit The present invention relates generally to communications, and more specifically to a method and apparatus for minimizing DC offset and second-order modulation products (IM2 noise) while demodulating RF signals. The principle of the invention can be applied to diffe... | 08/28/2007 |
| 7254380 | Low flicker noise current-folded mixer The current-folded mixer of this invention comprises an input stage and a switching stage. The input stage receives a radio frequency input RF and generates a modulated bias current to the switching stage. The switching stage has a switching pair, connected to a com... | 08/07/2007 |
| 7236761 | Balanced circuit arrangement and method for linearizing such an arrangement The present invention relates to a balanced circuit arrangement and methods for linearizing and calibrating such a circuit arrangement, wherein linearization is obtained by introducing a load imbalance between the output branches of the balanced circuit arrangement.... | 06/26/2007 |
| 7224749 | Method and apparatus for reducing re-radiation using techniques of universal frequency translation technology Methods, systems, and apparatuses for down-converting an electromagnetic (EM) signal by aliasing the EM signal, and applications thereof are described herein. Reducing or eliminating DC offset voltages and re-radiation generated when down-converting an electromagnet... | 05/29/2007 |
| 7218179 | Methods and apparatus for calibrating gm-Z In one embodiment of the present invention, an apparatus includes a plurality of gain stages each having a gain greater than one, and which are coupled to create a positive feedback at an oscillation frequency. The gain stages may be formed of transconductance gain ... | 05/15/2007 |
| 7206566 | Apparatus and method for frequency conversion An apparatus for frequency up conversion and down conversion using frequency multiplier circuits. The frequency multiplier circuits receive a lower frequency signal and are operated in a forward direction to provide a higher frequency output. The same frequency mult... | 04/17/2007 |
| 7187917 | Current interpolation in multi-phase local oscillator for use with harmonic rejection mixer A circuit provides a reduced harmonic content output signal OUTA and/or OUTB that is modulated according to an input signal 231. The circuit has an oscillator circuit 210 and a harmonic rejection mixer (HRM) 230. The oscillator circuit 210 | 03/06/2007 |
| 7184742 | High frequency device Precision in adjustment of filtering characteristics of a high frequency device is improved by providing a high frequency device comprising a first filter, a frequency converter, and a second filter. The high frequency device comprises a high frequency filter for ex... | 02/27/2007 |
| 7164896 | Method for driving a receiver stage and respective apparatus Whenever the oscillator frequency is a fraction or a multiple of the received frequency, another received frequency could in turn be there, which would then work as a kind of received disturbance frequency, and thus oscillator pulling occurs, which then severely imp... | 01/16/2007 |
| 7164901 | DC offset-free RF front-end circuits and systems for direct conversion receivers A DCR RF front-end removes the DC term resulting from mixer port to port leakage and feeds RF and LO signals into the mixers with different phase combinations. The signal inputs to the mixers result in the intermediate frequency (IF) output of mixers being 180 degre... | 01/16/2007 |
| 7164895 | Antenna tuned circuit for a superheterodyne receiver A multi-band receiver in which characteristics including a tracking error are improved is provided with a variable frequency oscillator circuit, a variable divider circuit (39) for dividing an oscillation signal (SVCO) of the variable frequency oscillator cir... | 01/16/2007 |
| 7164897 | Method and apparatus for conversion of radio frequency (RF) signals using aperiodic mixing signals An inexpensive, high-performance, fully-integrable, multi-standard transceiver with a topology including: an active mixer, followed by a high pass filter, and a passive mixer. The input signal is modulated up, or demodulated down, using a pair of complementary, aper... | 01/16/2007 |
| 7164899 | System and method for frequency translation with harmonic suppression using mixer stages A method for generating phase signals includes triggering a phase register to output a binary number stored in the phase register, wherein the phase register is triggered based at least in part on a voltage signal provided by a voltage controlled oscillator. The met... | 01/16/2007 |
| 7162001 | Charge pump with transient current correction An improved charge pump used in a phase-locked loop includes transient current correction capability by adding a canceling capacitance for each parasitic capacitance associated with a switching device in a charge pump. For each transient current component flowing th... | 01/09/2007 |
| 7155196 | Intermediate frequency tuner The present invention is a method and apparatus for optimizing performance of a transceiver selecting and processing an intermediate frequency free of significant interference, such as noise. A frequency band may be scanned to detect interference upon which an inter... | 12/26/2006 |
| 7155194 | Mixer used in direct conversion transceiver and related method A frequency conversion apparatus for converting an input signal having an input frequency into an output signal having an output frequency. The frequency conversion apparatus includes a first multiplier and a gm stage. The first multiplier multiplies a first local s... | 12/26/2006 |
| 7133656 | Direct conversion receiver A direct conversion receiver is disclosed wherein a received RF signal is mixed in a mixer with a local oscillation signal having a frequency the same as a desired central frequency, and is down-converted to a base band signal. The receiver comprises a divider for d... | 11/07/2006 |
| 7129994 | Television tuner having level of harmonics of oscillation signal suppressed low The level of the harmonics of oscillation signals for synchronous detection to be inputted to a mixer circuit for converting frequencies is suppressed low. A first integrated circuit component formed with a first mixer circuit for converting frequencies; a second in... | 10/31/2006 |
| 7130606 | Integrated semiconductor mixer An integrated semiconductor mixer includes a substrate (10), a radio-frequency balun (12) disposed on the substrate (10), a local oscillator balun (14) disposed on the substrate (10), an intermediate-frequency port (16) disp... | 10/31/2006 |
| 7130577 | Low noise converter employed in satellite broadcast reception system and receiver apparatus A reception frequency band is selected at 11.7 GHz–12.2 GHz, the local oscillating frequencies of local oscillators are determined at 10.75 GHz and 13.85 GHz, respectively, and each intermediate frequency band is selected at 950 MHz–1450 MHz and 1650 MHz–2150 ... | 10/31/2006 |
| 7130607 | Adjusting a programmable mixer A method for adjusting a programmable mixer of a local oscillation module to reduce local oscillation leakage begins by determining at least one of: DC offset of an input signal of the programmable mixer and process mismatches between a first mixing stage and a seco... | 10/31/2006 |
| 7123899 | Broadband single-ended input upconverter An upconverter for mixing a single-ended RF signal with a differential local oscillator signal to generate a differential IF signal, that includes a source degenerated first differential pair comprising matched first and second transistors, each having source, gate ... | 10/17/2006 |
| 7120414 | Circuit and method for receiving and mixing radio frequencies in a direct conversion receiver A frequency mixing circuit and a frequency mixing method. The frequency mixing circuit includes first and second differential amplifiers, a subtracter and a mixer. The first differential amplifier amplifies a first pair of input signals having a first frequency to g... | 10/10/2006 |
| 7110740 | Mixer circuit, receiver circuit, and frequency comparison circuit A mixer circuit contains a first terminal and a second terminal to which a first differential input signal is applied, and an active element switching a short-circuit between the first terminal and the second terminal. By driving the active element by a second diffe... | 09/19/2006 |
| 7099646 | Signal mixer having a single-ended input and a differential output A single-ended-to-differential mixer includes a differential input circuit having a single-ended input. The differential input circuit is responsive to a single-ended input signal to generate first and second signals. The single-ended-to-differential mixer includes ... | 08/29/2006 |
| 7099647 | Single chip direct conversion transceiver for reducing DC offset and method of manufacturing the same A single chip direct conversion transceiver that includes a substrate on which a mixer unit and a local oscillator are provided as a circuit, and a positive hole formed between the mixer unit and the local oscillator and filled with a conductive plug to block signal... | 08/29/2006 |
