Vromans, Maastricht
Jan Vromans, Maastricht NL
Patent application number | Description | Published |
---|---|---|
20090021320 | CARTESIAN MODULATION SYSTEM VIA MULTI-LEVEL PULSE WIDTH MODULATION - A system and method for Cartesian modulation achieved via generation of a three-level pulse width modulated signal. The system in overview comprises two binary pulse width modulated signal generators receiving signals related to the in-phase and quadrature components of a base-band signal and a combination and amplification stage that combines the signals provided by the two binary pulse width modulated signal generators. The binary pulse width modulated signal generators contain at least one signal comparator and at least one base-band pre-distortion element. The signals related to the in-phase and quadrature components of the base-band signal may be; the positive or negative parts of the in-phase component, the positive or negative parts of the quadrature component, the absolute value or sign of the in-phase component, or the absolute value or sign of the quadrature component. These signals may be distorted by a base-band pre-distortion element before being coupled to the comparators. | 01-22-2009 |
20100231314 | RADIO FREQUENCY PWM & PPM MODULATOR - The present invention relates in general to transferring the envelope information of a polar modulated signal to a varying pulsewidth signal, while the phase modulation is direct transferred to the phase modulation of this PWM signal. Accordingly, the resultant signal is a PWM-PPM-signal. Such a signal can efficiently amplified by use of switching amplifying stages. By the present invention four pre-distorted baseband signals are applied basically to 4 linear RF mixers and a two adders, which are, the only needed external RF building blocks to build the modulator according to the invention. That is, the basic idea of the invention resides in the way of modulation of the four baseband signals and the way of combining of the RF modulated signals. | 09-16-2010 |
Jan S Vromans, Maastricht NL
Patent application number | Description | Published |
---|---|---|
20100148834 | ENHANCED PREDISTORTION FOR SLEWING CORRECTION - The present invention relates to a circuit arrangement and method of applying predistortion to a baseband signal used for modulating a pulse-shaped signal, wherein an envelope information of the baseband signal is detected and slewing distortions of the pulse-shaped signal are reduced by applying at least one of a phase modulation and a duty cycle | 06-17-2010 |
20100246713 | TRANSMITTER COMPRISING A PULSE WIDTH PULSE POSITION MODULATOR AND METHOD THEREOF - A baseband signal generator ( | 09-30-2010 |
20100278228 | APPARATUS METHOD AND COMPUTER READABLE MEDIUM FOR A TRANSMITTER - An apparatus comprising a signal generator for generating a polar representation of a signal. The apparatus comprises further a first filtering unit configured to filter a low frequency part of the amplitude component of said signal and a second filtering unit configured to filter a high frequency-part of the amplitude component of said signal. In addition, the apparatus includes a pulse width modulating unit configured to modulate the filtered high frequency part of the amplitude component of said signal together with the phase component of said signal. Finally the apparatus includes a DC-DC converter configured to convert the filtered low frequency part of the amplitude component of said signal. Said DC-DC converter supplies a switching mode power amplifier for amplifying the pulse width modulated signal. | 11-04-2010 |
20110007794 | TRANSMITTER - The application refers to an apparatus comprising, a signal generator ( | 01-13-2011 |
20110007838 | TRANSMITTER - This application relates to an apparatus comprising a signal generator configured to generate a signal. The apparatus encompasses a predistortion unit configured to pre-distort the generated signal. The apparatus includes a pulse width modulating unit configured to modulate the pre-distorted signal into at least two signals. The apparatus comprises at least two amplifying units each configured to amplify one of the two modulated signals. | 01-13-2011 |
20110044404 | DIGITAL MODULATOR - The application relates to a digital modulator comprising at least one input terminal configured to receive at least one signal, at least one symbol generating unit comprising a first output terminal and at least a second output terminal, wherein the symbol generating unit is configured to generate a first symbol waveform for the first output terminal depending on the received signal, and wherein the symbol generating unit is configured to generate at least a second symbol waveform for the second output terminal depending on the received signal, wherein the first symbol waveform comprises at least one different parameter value compared to the second symbol waveform, at least one third output terminal connectable to at least the first output terminal and/or second output terminal via a switching unit, a controlling unit configured to control the switching unit depending on the received signal such that a modulated output signal is generated. | 02-24-2011 |
20110285471 | DECOMPOSER AND AMPLIFIER - A quadrature out-phasing system comprising: a first baseband signal modifier ( | 11-24-2011 |
Jan Sophia Vromans, Maastricht NL
Patent application number | Description | Published |
---|---|---|
20110051842 | EFFICIENT LINEAR LINC POWER AMPLIFIER - Method for setup of parameter values in a RF power amplifier circuit arrangement ( | 03-03-2011 |
20110260791 | Power Amplifier - A pre-driver for an amplifier comprising a load network in which the following elements are connected in the following order: a resistor-an inductor-a capacitor. Also described are a power amplifier comprising such a pre-driver, a method of fabricating a pre-driver for an amplifier, and a method of performing power amplification. | 10-27-2011 |
20110273234 | RECONFIGURABLE OUTPHASING CHIREIX AMPLIFIERS AND METHODS - Various embodiments relate to a reconfigurable integrated digital Chireix out-phasing power amplifier for use in high power base stations is described and a related method of said design. The power amplifier may include a power transistor circuitry having plurality of power transistors and shunt-series circuitry (L | 11-10-2011 |
20110273236 | POWER CONTROL OF RECONFIGURABLE OUTPHASING CHIREIX AMPLIFIERS AND METHODS - Various embodiments relate to a reconfigurable integrated digital Chireix out-phasing power amplifier for use in high power base stations is described and a related method of said design. The power amplifier may include a power transistor circuitry having plurality of power transistors and shunt-series circuitry (L | 11-10-2011 |
20120069930 | CIRCUIT FOR A TRANSMITTER - A transmitter ( | 03-22-2012 |