Matches 1 - 19 out of 19


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US20150126140 WIRELESS TRANSMITTER  
A wireless transmitter for resolving gain mismatch of TV band is disclosed. In one embodiment, a wireless transmitter comprises a two-stage 14-path harmonic-rejection mixer to manage harmonic...
US20090036068 WIRELESS SYSTEM HAVING HIGH SPECTRAL PURITY  
A wireless system having high spectral purity output signals. The wireless system has a transmitter circuit for transmitting an output signal and a power amplifier for amplifying the output signal...
US20150094004 HARMONIC REJECTIVE PASSIVE UP CONVERTER  
Methods and apparatuses are presented for harmonic reject upconverting a baseband signal using at least one quadrature passive upconversion mixer. In some embodiments, an apparatus may include a...
US20140155005 MOBILE WIRELESS COMMUNICATIONS DEVICE WITH REDUCED HARMONICS RESULTING FROM METAL SHIELD COUPLING  
A mobile wireless communications device includes a housing, antenna, and circuit board carried by the housing and having radio frequency (RF) circuitry operative with the antenna for receiving and...
US20070123182 Local oscillator leakage cancellation in radio transmitter  
The invention relates to a radio transmitter, including means for up-converting an input signal by mixing the input signal with a local oscillation signal, means for extracting an observation...
US20050221772 Harmonic mixer and radio communication device having the same  
A harmonic mixer comprising an anti-parallel diode having two diodes connected in parallel in reverse directions between first and second ends, the first end receiving a local oscillation signal,...
US20120171973 SYSTEMS AND METHODS FOR IMPLEMENTING A HARMONIC REJECTION MIXER  
Various embodiments of systems and methods for generating local oscillator (LO) signals for a harmonic rejection mixer are provided. One embodiment is a system for generating local oscillator (LO)...
US20080014872 Method and device for reducing exposure to undesirable electromagnetic radiation  
The present invention is a method and device for reducing exposure to undesirable electromagnetic radiation. The device uses a target antenna to capture certain radiation from an active emission...
US20140065988 FREQUENCY-MULTIPLIED HARMONIC SUPRESSION METHOD FOR RF CIRCUIT  
A frequency-multiplied harmonic suppression RF circuit design method includes the steps of defining respective operating frequencies of predetermined major electronic components of the RF circuit...
US20140030990 Methods and Circuits for Detuning a Filter and Matching Network at the Output of a Power Amplifier  
In transmitter modules or power amplifier (PA) modules there is at least a possible path for a second and even a third harmonic of a low band to crossover unfiltered into the high band path and...
US20070111679 Method and apparatus for vector signal processing  
A vector signal processor (80) can include a digital to time converter (DTC), an RF memory (RFM) or an electronically tunable transmission line (ETTL) (82), a mixer, or other phase shifter (70)...
US20150063175 WIRELESS COMMUNICATION APPARATUS  
According to an embodiment, a wireless communication apparatus includes a clock transmitting unit, a function circuit and a control unit. The clock transmitting unit is configured to transmit a...
US20070123183 Apparatus and method for generating RF without harmonic interference  
A transmitter capable of operating according to a first standard that does not interfere with a nearby frequency generator operating according to a second standard. The transmitter comprises an...
US20130309984 HIGH-FREQUENCY SWITCH MODULE  
A low pass filter connected between an individual port of a switch device and a high-frequency switch module attenuates the second harmonic and the third harmonic of a transmission signal input to...
US20100112965 Method and Apparatus to Transmit, Receive and Process Signals with Narrow Bandwith Devices  
In a representative embodiment, an electronic transmitter comprises a signal source configured to provide an input signal comprising a plurality of frequency components; and a plurality of...
US20050186920 Apparatus for and method of noise suppression and dithering to improve resolution quality in a digital RF processor  
A novel apparatus for and a method of noise and spurious tones suppression in a digital RF processor (DRP). The invention is well suited for use in highly integrated system on a chip (SoC) radio...
US20160373176 HIGH LINEARITY ANTENNA SWAPPING CIRCUITRY  
Antenna swapping circuitry includes a first pole, a second pole, a first throw, a second throw, and a number of switching elements. A first switching element is coupled between the first pole and...
US20160329918 SINGLE VARACTOR STACK WITH LOW SECOND-HARMONIC GENERATION  
Embodiments include semiconductor devices related to compound varactor circuits. Specifically, a semiconductor device may be constructed of a modified anti-series string of varactor pairs, wherein...
US20150311874 BROADBAND POWER AMPLIFIER SYSTEMS AND METHODS  
Disclosed are systems, devices, and methodologies to reduce harmonics in a radio frequency output signal. A power amplifier system comprises a power amplifier and a tunable output matching network...

Matches 1 - 19 out of 19