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| Number | Title | Issue Date |
| 8004368 | Radio frequency amplifier with digital amplitude modulation and method for controlling the delivering of power A digital amplitude modulator. The digital amplitude modulator is configured to modulate the amplitude of an input carrier signal based on input digital data and generate a corresponding output signal. The digital amplitude modulator includes a first variable gain a... | 08/23/2011 |
| 7932791 | Signal modulation device and signal amplifier cooperative therewith A signal modulation device and a signal amplifier cooperative therewith. The signal modulation device includes a local oscillation signal source, a baseband signal source, a first NMOS transistor, and a second NMOS transistor, wherein the first and second NMOS trans... | 04/26/2011 |
| 7907029 | Modulator A modulator includes a first converter, a second converter and a mixer. The first converter is configured to receive a first bit and provide a first current that is a function of the first bit. The second converter is configured to receive a second bit and provide a... | 03/15/2011 |
| 7884681 | Radio frequency power amplifier improvements using pre-distortion of an amplitude modulation power supply Embodiments of the present invention include amplitude-modulated or polar-modulated radio frequency (RF) power amplifier circuitry, in which an envelope power supply input to an RF power amplifier is powered by a pre-distorted amplitude modulation (AM) power supply.... | 02/08/2011 |
| 7688157 | Selective envelope modulation enabling reduced current consumption A modulation system includes an amplitude modulation path and a phase modulation path coupled to the amplitude modulation path. One of the amplitude modulation path and the phase modulation path receive a reduced current such that the reduced current reduces power c... | 03/30/2010 |
| 7538631 | Multi-mode amplitude modulator control method A power management device providing a power amplifier with power supply voltage is provided. The power management unit includes a parallel-hybrid amplitude modulator apparatus having a linear part configured to track frequency components of an input signal above a d... | 05/26/2009 |
| 7356315 | Outphasing modulators and methods of outphasing modulation In one exemplary embodiment of the invention, an outphasing modulator may include at least a multiplier to multiply an amplitude modulation signal by a phase modulated carrier signal to generate a modulated signal. The outphasing modulator may also include a phase s... | 04/08/2008 |
| 7343138 | Compensating for load pull in electromagentic signal propagation using adaptive impedance matching The invention relates to for processing an electromagnetic input signal, wherein the signal is passed through an input to be modified across a plurality of modifying segments using a characteristic of the signal, and wherein the plurality of segments have a pluralit... | 03/11/2008 |
| 7336794 | High efficiency driver for miniature loudspeakers In a first aspect the present invention provides a compact high efficiency driver suitable for driving a loudspeaker, such as a miniature loudspeaker for mobile phones or hearing aids. The driver comprising an interface for receiving an input signal, a three-level m... | 02/26/2008 |
| 7327184 | Low-power multi-level pulse amplitude modulation driver and semiconductor device having the driver A low-power multi-level pulse amplitude modulation (PAM) driver, and a semiconductor device having the same, in which the multi (M)-level PAM driver includes a load unit, first and second current sources, a pair of first input transistors, a pair of second input tra... | 02/05/2008 |
| 7289005 | Polar modulator and a method for modulation of a signal A polar modulator contains a phase locked loop which is designed to emit a radio-frequency signal at one frequency to one output, with the frequency being derived from the reference signal and from a phase modulation signal at a control input of the phase locked loo... | 10/30/2007 |
| 7274266 | Radio frequency excitation arrangement A method is performed for influencing the signal shape of an output signal of an RF power resonance amplifier and an RF excitation arrangement including an RF power resonance amplifier. A basic signal of a basic frequency is amplified and modulated with a modulation... | 09/25/2007 |
| 7257756 | Digital frequency synthesis clocked circuits Embodiments of the invention may include a reference input port to receive a reference clock, the reference clock being based on a bypass clock, a feedback input port to receive a feedback clock from a clocked circuit, and logic to compare the reference clock and th... | 08/14/2007 |
| 7254195 | Apparatus, methods and articles of manufacture for dynamic differential delay correction The invention is directed to a system for dynamically correcting an electromagnetic wave by processing two or more aspects of the electromagnetic wave along two or more separate signal paths; comparing an expected value for at least one of the aspects of the electro... | 08/07/2007 |
| 7248639 | Method for reducing the out-of-band emission in AM transmitters for digital transmission A method for reducing out-of-band emission in an AM transmitter for digital transmission includes generating, from a digital modulation signal, an amplitude signal and a phase-modulated radio frequency signal configured to control the AM transmitter. A digital modul... | 07/24/2007 |
| 7245183 | Apparatus, methods and articles of manufacture for processing an electromagnetic wave A method of processing an electromagnetic wave comprises regulating at least two independently controllable current sources with a signal determined from at least one characteristic of the electromagnetic wave to generate a processed electromagnetic wave from at lea... | 07/17/2007 |
| 7239859 | Method and system for establishing a telephony data connection to receiver The current invention provides a method for establishing a telephony data connection to a receiver. The telephony data connection is initiated at a source location. A carrier signal is generated for the connection and the carrier signal is modified. The modified car... | 07/03/2007 |
| 7199675 | Source-injection parallel coupled LC-quadrature voltage controlled oscillator A quadrature VCO comprises: a first delay cell including a first differential VCO coupled between a power supply and a first current source; and first and second coupling transistors that each include a first terminal, a second terminal coupled to the power supply, ... | 04/03/2007 |
| 7183958 | Sub-ranging digital to analog converter for radiofrequency amplification An apparatus and method for amplifying a radiofrequency signal using a main Digital to Analog Converter (RFDAC) and a subordinate Digital to Analog Converter (Sub-DAC). The main RFDAC provides a first portion of a N-bit digital output, which specifies the amplificat... | 02/27/2007 |
| 7184491 | Wireless communication apparatus A linear system and an EER system are used in combination such that the EER system can also be used in a cellular phone with a wide output dynamic range. In the EER system, linear control of an amplifier becomes difficult in a low output range. Thus, use of the EER ... | 02/27/2007 |
| 7164328 | Direct digital amplitude modulator 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 are disclosed. The interpolation technique greatly reduces the amplitud... | 01/16/2007 |
| 7154329 | Method and apparatus for compensating amplifier output for temperature and process variations An amplifier circuit includes a calibration circuit with a controllable circuit element such as a digital resistor. One or more properties of the controllable circuit element (e.g., the resistance in a digital resistor) is varied by a digital calibration word such t... | 12/26/2006 |
| 7145409 | Low power quadrature voltage controlled oscillator using back gate Disclosed is a quadrature VCO (voltage controlled oscillator) which comprises a first delay cell including a first switching transistor and a second switching transistor, the first delay cell outputting first and second in-phase signals with different phases; and a ... | 12/05/2006 |
| 7119629 | Synchronized controlled oscillation modulator A synchronized controlled oscillation modulator (SCOM), comprising at least one, Controlled Oscillation Modulator (5), and synchronizing means (1, 6) connected to said COM modulator. The modulator can comprise several COM modulators, and the synchroniz... | 10/10/2006 |
| 7092681 | High output power radio frequency integrated circuit A high output power radio frequency integrated circuit includes an up conversion module, a plurality of drivers and a plurality of integrated circuit pads. The up conversion module is operably coupled to convert a low intermediate frequency (IF) signal into a radio ... | 08/15/2006 |
| 7084799 | Sigma-delta modulated amplifier A sigma-delta modulated amplifier is disclosed that is operable to sum an input signal and a feedback signal, integrate the summed signal, asynchronously quantize the integrated signal, sample the quantized signal utilizing a pseudo-random osculating signal, and amp... | 08/01/2006 |
| 7082169 | Mirror translation loop transmitter architecture A mirror translation loop upconverter that is capable of upconverting both constant envelope and non-constant envelope modulation formats is disclosed. Embodiments of the invention provide the ability to upconvert a transmit signal that includes only a phase-modulat... | 07/25/2006 |
| 7034614 | Modified polar amplifier architecture An amplifier system is provided that switches between operation in a polar mode and a signal restoration mode based on a characteristic of an input signal relative to a threshold level. The system includes a correction path that mitigates distortion and out-of-band ... | 04/25/2006 |
| 7023292 | Polar modulation using amplitude modulated quadrature signals Polar modulators include a phase splitter, a controller, variable current sources, transistor circuits, and a combiner. The phase splitter splits a RF carrier signal into quadrature component signals that are 90 degrees out of phase with each other. The controller g... | 04/04/2006 |
| 7016432 | Contactless IC card system In a contactless IC card system, a modulating circuit manufactured in an IC form is operable at a high power efficiency. The demodulating apparatus is configured to include: first signal output means for outputting a first output signal having a predetermined phase ... | 03/21/2006 |
| 7009447 | Outphasing modulator Briefly, an apparatus having an outphasing modulator that may provide at least first and second outphased signals to a power amplifier. The outphasing modulator may control amplitude of the first and second outphased signals by an amplitude modulation controller whi... | 03/07/2006 |
| 7009601 | System and method for test data reporting using a status signal In-flight entertainment systems provide entertainment for passengers on commercial airline flights. Presently, usually on longer flights, video entertainment is commonly available on in-flight passenger entertainment systems. In-flight entertainment systems can disp... | 03/07/2006 |
| 7003048 | Communication arrangement comprising powerful integrated amplitude-modulation means In a communication arrangement (1) provided for transmitting data (DA) to a transponder (2) which arrangement includes a data source (5) for delivering data (DA) and includes a carrier signal generator (6) for generating a carrier signal ... | 02/21/2006 |
| 6987434 | Non-radiative dielectric waveguide modulator having waveguide type hybrid coupler A non-radiative dielectric (NRD) waveguide modulator is provided having a waveguide type hybrid coupler, in which by forming a waveguide type 180° hybrid coupler and waveguide as a single body, the structure is simplified and manufacturing processes are reduced. Th... | 01/17/2006 |
| 6975843 | Method and an arrangement relating to telecommunications systems A transmitter with a pulse width modulation amplifier includes an inner positive feedback loop, which has a self oscillating modulator and a switching stage and is connected to an LP filter. Outer feedback loops from the LP filter respective from an output transform... | 12/13/2005 |
| 6952456 | Ultra wide band transmitter A transmitter system is provided. In one embodiment, the transmitter system includes a data modulation unit, which generates a stream of data that is synchronized with a master clock. The transmitter system additionally includes a transmitter that transmits the stre... | 10/04/2005 |
| 6937108 | Methods and apparatus for offset chirp modulation A method and apparatus for producing a modulation scheme usable in conjunction with information transmission and reception via waveforms, such as electromagnetic waves. The modulation scheme is usable for such purposes as resolving range ambiguities and overcoming f... | 08/30/2005 |
| 6922114 | Operating method and system for the resonant operation of high-pressure lamps in longitudinal mode The operating method is based on the simultaneous application of FM and AM, and is distinguished by passing through three operating states, specifically a warm-up phase, an impressing phase and the continuous operation. In the warm-up phase, the f002_h... | 07/26/2005 |
| 6903619 | Electromagnetic wave transmitter systems, methods and articles of manufacture A transceiver and transmitter are shown. A baseband processor receives a signal for transmission. It converts the signal into amplitude and phase polar components. Each component is then processed—the phase component through a wideband phase modulator and the ampl... | 06/07/2005 |
| 6876265 | System and method for using a saw based RF transmitter for AM modulated transmission in a TPM For use in a tire pressure monitoring system, an amplitude modulation (AM) radio frequency (RF) oscillator includes a modulator and a generator. The modulator may be configured to generate a modulation signal in response to a data input signal. The generator may be ... | 04/05/2005 |
