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WO/2002/097967A1 |
Direct frequency modulation of a phase-locked loop (PLL) output signal is achieved by means of a modulation signal comprising a digital sequence. The digital modulation signal is coupled to the input of the VCO of the PLL, and is also co...
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WO/2002/095948A2 |
Disclosed is a phase control loop enabling a frequency measurement operational mode for precise detection of the loop gain of the control loop, in addition to a normal operation mode, whereby a frequency divider (2) is embodied as a freq...
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WO/2002/093781A2 |
The invention relates to a method for modulating an output voltage of a transmitter circuit comprising a voltage controlled oscillator, a digital/analog converter and an antenna circuit, the method comprising the method comprising sendin...
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WO2000024117A9 |
Methods, systems, and apparatuses for down-converting an electromagnetic (EM) signal by aliasing the EM signal are described herein. Briefly stated, such methods, systems, and apparatuses operate by receiving an EM signal and an aliasing...
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WO/2002/084908A2 |
Method and system are disclosed for modulating a radio frequency carrier signal. The radio frequency carrier signal is modulated using a VCO running at a center frequency of 0 Hz. A baseband signal is used to adjust the overall frequency...
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WO/2002/084785A1 |
The present invention relates to an FM transmitter for the NRD guide equipped with a voltage control oscillator using a varactor diode in the rear part of the Gunn diode oscillator.
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WO/2002/080350A1 |
An RF power oscillator for contactless card antennas shapes a carrier signal at the operating frequency utilizing a delay circuit having a number of taps for delaying the carrier signal by different lengths of time. The delayed signals a...
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WO/2002/075918A2 |
An apparatus and method for creating an amplifier input waveform based on received phase and amplitude information from an input signal. The apparatus includes a first switch receiving phase information from a primary waveform and a seco...
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WO/2002/075927A2 |
The invention relates to a frequency closed loop for frequency modulation comprising an oscillator (VCO), whereby a first signal path (13), a second signal path (14) and a switch (S1) are provided for switching between the signal paths (...
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WO/2002/069439A1 |
The present invention relates to a transmitter equipped with an FM modulator comprising: A diode mount upon which a Gunn diode, which is a component for the carrier frequency oscillation, is mounted; a strip oscillator for feeding the mi...
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WO2001010013A9 |
The present invention provides for high-efficiency power control of a high-efficiency (e.g. hard-limiting or switch-mode) power amplifier. The spread between a maximum frequency of the desired modulation and the operating frequency of a ...
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WO/2002/067428A2 |
The invention relates to a method for compensating a PLL circuit operating according to the two-point modulation principle . Said PLL circuit is placed in a transient state without injecting a modulation, whereupon an analog and a digita...
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WO2000024120A9 |
The present invention includes a system and method for ensuring reception of a communications signal. A modulating baseband signal with desired information is accepted, and a plurality of redundant spectrums is generated. Each redundant ...
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WO/2002/067441A2 |
In a method of calibrating a quadrature transmitter (1), a first calibration signal (DS1) is injected into an in-phase transmit branch (7,8,9) of the quadrature transmitter, and a second calibration signal (DS2) is injected into a quadra...
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WO/2002/067364A1 |
The present invention relates to an ASK modulator using an NRD gude. According to the present invention, by installing a diode mount which is equipped with the Schottky Barrier Diode on the end of the NRD gude, the modulation is made pos...
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WO/2002/067368A1 |
The present invention relates to an ultra high speed modulator using a coupler of an NRD guide. According to the first preferred embodiment of the present invention, the modulation is conducted by making a binding block at the binding po...
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WO/2002/063772A2 |
A data item with an item width of N bits is fed to a sigma-delta programmer. The highest-order L bits of the data item represent the places before the decimal point and the remaining N-L low-order bits represent the decimal places of the...
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WO/2002/063785A1 |
This invention is a method of carrier suppression tuning of a wireless communication device (100) utilizing a quadrature modulator (104) in a transmission path (102). A power detector (128) and a processor (132) are coupled to the ends o...
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WO/2002/062029A2 |
The invention relates to a method for amplitude compensation in transceivers having a PLL circuit which works according to the principle of two-point modulation. The amplitude of an analog modulation signal is selected according to a mod...
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WO/2002/056523A2 |
The present invention is a method and apparatus (Fig. 5) to remove the adverse effects due to the imbalance between inphase and quadrature channels for I-Q demodulators and modulators in multi-carrier systems. A first balancer (510) gene...
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WO/2002/054587A2 |
An apparatus for providing a waveform as a switched input into an output matching network (12) of a standard class E amplifier. The apparatus includes a switch (16) in communication with the input and the combining device (15) receiving ...
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WO/2002/049203A2 |
A precision oven-controlled crystal oscillator (10) uses an adjustment feedback signal that, when mixed with a reference signal from a stable reference oscillator (32), accurately controls the generation of an output signal from a voltag...
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WO/2002/047250A2 |
A transmitted signal comprises two components which define a vector. Modulation of the signal entails rotating the vector. The new values of the components needed to represent a change in the rotation of the vector are calculated from th...
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WO/2002/047249A2 |
The present invention relates to radio frequency signal generation and amplification and relates to a polar loop amplifier arrangement. The present invention seeks to overcome problems associated with known polar loop amplifiers such as ...
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WO/2002/047344A2 |
A waveform generator for use in IQ modulation in a wireless cellular device having an FM waveform generator (104) that is programmable to generate a desired FM frequency deviation; a digital accumulator (108, 110, 112) to provide phase g...
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WO2000069085A9 |
A monolithic CMOS programmable digital intermediate frequency receiver (20) includes a programmable memory (29), a clock generator (26), a sigma delta converter (22), a digital downconverter (24), and a decimation filter network (28). Th...
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WO/2002/037666A2 |
A digital signal processor generates in-phase, quadrature-phase and amplitude signals from a baseband signal. A modulator modulates the in-phase and quadrature-phase signals to produce a modulated signal. A phase locked loop is responsiv...
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WO/2002/037667A1 |
This invention provides various embodiments of a direct digital amplitude modulator (DDAM) for modulating radio frequency (RF) or intermediate frequency (IF) or baseband signal with the invented interpolation technique. The interpolation...
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WO/2002/035787A2 |
A transmitter has a quadrature modulator that provides a modulated signal at a first frequency. The transmitter has a phase locked loop, of which a voltage controlled oscillator is coupled after the phase comparator of the phase locked l...
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WO/2002/035712A2 |
A signal synthesiser arrangement includes a signal generator in the form of a voltage controlled oscillator (VCO) (10) which generates a high frequency source signal under the control of a control unit (16). The synthesiser control unit ...
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WO/2002/031963A2 |
Phase-locked loop methods and structures are provided for generating modulated communication signals with nonconstant envelopes. These methods and structures realize the improved communication performance of nonconstant-envelope modulati...
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WO/2002/015383A1 |
An oscillator (100, 200) and a method of adjusting the frequency of oscillation of the oscillator (100, 200) are disclosed for generating a signal with an adjustable frequency in a frequency range from 1GHz to 200GHz. The oscillator (100...
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WO/2002/013370A2 |
A frequency translator (201) uses a CORDIC phase rotator (202) coupled to a phase accumulator (102) to translate an input signal in frequency. The CORDIC phase rotator performs required phase angle rotations of input vectors using only s...
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WO/2002/013369A1 |
A Multi-mode Loop Frequency modulator (10) for modulating a carrier signal according to various modulation pulse shapings and data signal to provide a modulated output signal (VCOout), comprises a waveform generator (12) and two multiple...
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WO/2002/009381A2 |
A digital modulator (fig 11) includes a source of a plurality of digital data signals which have a common data bit period. A plurality of encoders each encodes a corresponding one of the plurality of digital data signals using a variable...
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WO/2002/009270A2 |
A system for transmitting and receiving data is provided. The system includes a direct-conversion receiver that receives a signal modulated on a carrier frequency signal. The direct-conversion receiver includes one or more subharmonic lo...
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WO/2002/007401A2 |
A variable frequency synthesizer is used during generation of a phase-encoded signal. The reference signal input to the frequency synthesizer is not held stable and constant, but is instead deliberately varied to control the output of th...
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WO/2002/007303A1 |
The invention concerns a method and a circuit for modulating a carrier signal (Se) with a signal (SCj) comprising at least a modulation cell (CMi) by phase shift for receiving two digital control signals (Scji, SCji2) representing at lea...
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WO/2002/003541A2 |
A digitally modulated RF amplifier system having improved adjacent sideband distortion reduction at spaced apart frequencies located essentially at the edges of a desired frequency channel. The system includes a digital modulator that re...
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WO/2001/099270A2 |
Quadrature modulators include a quadrature splitter and a pair of Gilbert Multiplier Cells coupled to the quadrature splitter, each of which is biased in Class-B. The quiescent current bias in the Gilbert Multiplier Cells may be substant...
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WO/2001/095477A2 |
A system and method of modulation is described that initially over-modulates with an information signal at a scale that is N times an intended modulation scale and then subsequently, frequency-divides the over-modulated signal by the sam...
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WO/2001/093415A1 |
The invention concerns a digital modulation synthesizer for generating an output frequency or phase modulated radiofrequency signal (S¿OUT?), comprising a pre-accentuation filter (18) receiving a frequency modulation digital signal (F¿...
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WO/2001/089169A1 |
In a radio circuit (299) that forwards a signal pair (I,Q) by a first channel (291, I) and by a second channel (292, Q), a gain controller (200) monitors differences between the overall gains (G¿I?, G¿Q?) in the channels and correc...
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WO/2001/084704A2 |
The present invention, generally speaking, provides an RF power amplifier that exhibits high PAE at high output powers. The design of the power amplifier is based on the observation that the switching transistor is controlled by either v...
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WO/2001/079880A1 |
Disclosed is a method for detecting and compensating non-linearities in a microwave radar system, wherein a transmission signal whose frequency is modulated according to a given function is produced with the aid of a transmission oscilla...
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WO/2001/080418A2 |
A method and system is described wherein an information signals is gated at a frequency that is a sub-harmonic of the frequency of the desired output signal. In the modulation embodiments, the information signal is modulated as part of t...
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WO/2001/071904A1 |
A quadrature transceiver has a transmitter, a receiver, and a common local oscillator. With the transmitter switched off and the receiver switched on, a DC-error in the receiver is nulled in servo loops in in-phase and a quadrature recei...
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WO/2001/071931A2 |
A digital tuner (70) for maximizing tuning range for a particular intermediate frequency includes an analog-to-digital converter (78) operating at an input clock frequency to sample an analog input signal (76) and output a multi-bit digi...
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WO/2001/069776A1 |
The invention concerns methods for modulating the amplitude of a carrier designed in particular to interrogate an authentication label operating without contact. It consists in powering the output transistor (301) of the interrogation si...
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WO/2001/067596A1 |
Band pass amplifiers and methods for driving the same are described. According to one embodiment, a frequency selective network (102) is provided in a feedback loop (112). An analog-to-digital converter (104) is coupled to the frequency ...
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