Patent application number | Description | Published |
20080291974 | Signal Transmitter for Wideband Wireless Communication - A signal transmitter for generating a wideband RF signal for use in, for example, a 60 GHz wireless area network, wherein a wideband (e.g 4 GHz) baseband signal is divided into a number of sub-signals ( | 11-27-2008 |
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 |
20100156502 | SIGNAL PROCESSOR COMPRISING A FREQUENCY CONVERTER - A signal processor includes a frequency converter of the multiphase type. A first phase mixer (SWC | 06-24-2010 |
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 |
20100253412 | PASSIVE HARMONIC-REJECTION MIXER - An electronic device comprising a passive harmonic-rejection mixer. The passive harmonic rejection mixer has an input connected to several sub-mixer stages, and the sub-mixer stages are connected to a summing module for generating the output. Each sub-mixing stage comprises a gating module and a respective amplifier, the gating module adapted to selectively pass the input signal or the input signal with inverted polarity under the control of control signals. | 10-07-2010 |
20110164666 | Low-1/f-Noise Local Oscillator for Non-Overlapping Differential I/Q Signals - The present invention relates to a circuit arrangement ( | 07-07-2011 |
Patent application number | Description | Published |
20110043267 | CALIBRATION OF LINEAR TIME-INVARIANT SYSTEM'S STEP RESPONSE - The invention concerns in general measurement of the transfer function of linear time invariant systems, more particular the calibration of such systems based on a measured transfer function. According to a first aspect the present invention an arrangement for measuring the transfer function of a linear time-invariant system is disclosed. According to a second aspect of the present invention the arrangement is implemented into a linear time-invariant circuitry having a transfer function representing the amplitude and phase characteristic of the circuitry, where by means of the arrangement for measuring the transfer function the transfer function can be optimized in accordance with certain criteria on-the-fly, i.e. in or before operation of the circuit. Finally, an effective and simple method for measuring of the transfer function of a linear time-invariant system together with the use or application of the method is shown. | 02-24-2011 |
20110095807 | FREQUENCY CONVERSION - A frequency conversion circuit configured to mix a first input signal (RF+,RF−) at a first frequency with a second input signal (LO+,LO−) at a second frequency to provide an output intermediate frequency signal (IF | 04-28-2011 |
20120105128 | CALIBRATION OF PASSIVE HARMONIC-REJECTION MIXER - An electronic device comprising a passive harmonic-rejection mixer ( | 05-03-2012 |
20120154050 | CIRCUIT WITH REFERENCE SOURCE TO CONTROL THE SMALL SIGNAL TRANSCONDUCTANCE OF AN AMPLIFIER TRANSISTOR - A circuit has a reference source ( | 06-21-2012 |
20130028352 | DOWN-CONVERTER - A down-converter for receiving a multiband radio frequency signal (RF) and a local oscillator signal comprises a frequency divider and a heterodyne receive chain. The frequency divider is configured to divide the local oscillator signal and provide different divided local oscillator signals. The heterodyne receive chain comprises a first stage mixer and second stage mixers. The first stage mixer is configured to mix the multiband radio frequency signal and either the local oscillator signal or a divided local oscillator signal to generate a first intermediate frequency signal. Each second stage mixer is configured to mix the first intermediate signal and a divided local oscillator signal to generate second intermediate frequency signals that each represent a band from the multiband radio frequency signal. The frequency divider is configured to provide a different divided local oscillator signal to each of the second stage mixers. | 01-31-2013 |
Patent application number | Description | Published |
20080252607 | Image Display That Moves Physical Objects and Causes Tactile Sensation - An image display including a touch-sensitive display, that creates tactile sensation and movement of an object ( | 10-16-2008 |
20090132478 | DATA PROCESSING SYSTEM AND METHOD - A data processing method comprises receiving a search term, accessing a data store, the data store including at least one searchable element, selecting components of the search elements, each component containing the search term, and creating a list of the components, the list including an indicator of the occurrence of the component. | 05-21-2009 |
20120229403 | IMAGE DISPLAY THAT MOVES PHYSICAL OBJECTS AND CAUSES TACTILE SENSATION - An image display including a touch-sensitive display, that creates tactile sensation and movement of an object ( | 09-13-2012 |
20120229404 | IMAGE DISPLAY THAT MOVES PHYSICAL OBJECTS AND CAUSES TACTILE SENSATION - An image display including a touch-sensitive display, that creates tactile sensation and movement of an object ( | 09-13-2012 |
20120229405 | IMAGE DISPLAY THAT MOVES PHYSICAL OBJECTS AND CAUSES TACTILE SENSATION - An image display including a touch-sensitive display, that creates tactile sensation and movement of an object ( | 09-13-2012 |