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Asuri
Bhushan Asuri, San Diego, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20110300914 | REDUCING POWER CONSUMPTION BY IN-CIRCUIT MEASUREMENT OF RECEIVE BAND ATTENUATION AND/OR NOISE - Although the duplexer in a full-duplex transceiver circuit may only be guaranteed by the duplexer manufacturer to have a transmit band rejection from its TX port to its RX port of a certain amount, and may only be guaranteed to have a receive band rejection of another amount, the actual transmit band rejection and the actual receive band rejection of a particular instance of the duplexer may be better than specified. Rather than consuming excess power in the receiver and/or transmitter in order to meet performance requirements assuming the duplexer only performs as well as specified, the duplexer's in-circuit performance is measured as part of a transmitter-to-receiver isolation determination. Transmitter and/or receiver power settings are reduced where possible to take advantage of the measured better-than-specified in-circuit duplexer performance, while still meeting transceiver performance requirements. Power settings are not changed during normal transmit and receive mode operation. | 12-08-2011 |
Bhushan S. Asuri, San Diego, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20110012648 | SYSTEMS AND METHODS FOR REDUCING AVERAGE CURRENT CONSUMPTION IN A LOCAL OSCILLATOR PATH - A method for reducing average current consumption in a local oscillator (LO) path is disclosed. An LO signal is received at a master frequency divider and a slave frequency divider. Output from the master frequency divider is mixed with an input signal to produce a first mixed output. Output from the slave frequency divider is mixed with the input signal to produce a second mixed output. The second mixed output is forced to be in phase with the first mixed output. | 01-20-2011 |
| 20110051838 | DRIVING A MIXER WITH A DIFFERENTIAL LO SIGNAL HAVING AT LEAST THREE SIGNAL LEVELS - The mixer of a transmit chain of a wireless transmitter (such as the transmitter of a cellular telephone handset) is driven with low third harmonic in-phase (I) and quadrature (Q) signals. The low third harmonic I and Q signals have three or more signal levels, and transition between the these three or more signal levels at times such that each of the I and Q signals approximates a sine wave and has minimal third harmonic spectral components. In one example, reducing the third harmonic components of the I and Q signals simplifies design of amplifier stages of the transmitter and helps reduce receive band noise. | 03-03-2011 |
| 20110128084 | METHODS AND APPARATUS FOR INDUCTORS WITH INTEGRATED PASSIVE AND ACTIVE ELEMENTS - An integrated circuit is described. The integrated circuit includes an inductor that has a large empty area in the center of the inductor. The integrated circuit also includes additional circuitry. The additional circuitry is located within the large empty area in the center of the inductor. The additional circuitry may include a capacitor bank, transistors, electrostatic discharge (ESD) protection circuitry and other miscellaneous passive or active circuits. | 06-02-2011 |
| 20110133794 | PHASE LOCKED LOOP WITH DIGITAL COMPENSATION FOR ANALOG INTEGRATION - A phase locked loop (PLL) device includes a digital differentiator configured to differentiate a digital loop signal to at least partially compensate for the integration of an analog current signal by an analog integrator. A digital to analog converter (DAC) includes a current source output stage that generates the analog current signal based on an digital input signal. The analog integrator integrates the analog current signal to generate a voltage control signal for controlling a voltage controlled oscillator (VCO). | 06-09-2011 |
| 20110133799 | CONFIGURABLE DIGITAL-ANALOG PHASE LOCKED LOOP - A phase locked loop (PLL) device is configurable in an analog phase locked loop and a hybrid analog-digital phase locked loop. In an analog mode, at least a phase detector, an analog loop filter, and a voltage controlled oscillator (VCO), are connected to form an analog loop. In a digital mode, at least the phase detector, the voltage controlled oscillator (VCO), a time to digital converter (TDC), a digital loop filter and a digital to analog converter (DAC) are connected to form the hybrid digital-analog loop. | 06-09-2011 |
Bhushan Shanti Asuri, San Diego, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20100029239 | UPCONVERTER AND DOWNCONVERTER WITH SWITCHED TRANSCONDUCTANCE AND LO MASKING - An upconverter and a downconverter having good performance are described. In one design, the upconverter includes first, second, and third sets of transistors. The first set of transistors receives baseband signals and provides an upconverted signal. The second set of transistors switches the transconductance of the transistors in the first set based on transmit (TX) local oscillator (LO) signals. The third set of transistors enables and disables the transistors in the second set based on a TX VCO signal. In one design, the downconverter includes first, second, and third sets of transistors. The first set of transistors receives a modulated signal and provides baseband signals. The second set of transistors switches the transconductance of the transistors in the first set based on receive (RX) LO signals. The third set of transistors enables and disables the transistors in the second set based on an RX VCO signal. | 02-04-2010 |
| 20110141930 | BASEBAND COMPENSATION FOR PHASE DISCONTINUITIES IN RADIO FREQUENCY COMMUNICATION DEVICES - A method for compensating for phase discontinuities on a communication device is described. A communication device may determine a desired output power. The communication device may determine a Digital-to-Analog Converter (DAC) gain corresponding to the desired output power. The communication device may determine a cumulative phase offset based on the DAC gain. The communication device may apply the DAC gain. The communication device may apply a phase compensation to a rotator to adjust for the cumulative phase offset. | 06-16-2011 |
Hari Asuri, Irvine, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20090323128 | SYSTEM, METHOD, AND COMPUTER PROGRAM PRODUCT FOR SCANNING - A system, method, and computer program product are provided for scanning. In use, a plurality of virtual files is stored. Additionally, several of the virtual files are each associated with a particular document type. Further, selection of one of the virtual files is detected. Further still, availability of a scanner is determined. Also, a scan is initiated using the scanner. In addition, scan data is received from the scanner. Further, the scan data is processed according to parameters in the selected virtual file. Further, the scanned images are displayed to the user for repair and acceptance, optionally based on a parameter in the selected virtual file or user request. Further still, a scan file is output to at least one of a user, a memory, and another process. Additional systems, methods and computer program products are also presented. | 12-31-2009 |
Hari S. Asuri, Irvine, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20090214112 | SYSTEMS AND METHODS OF ACCESSING RANDOM ACCESS CACHE FOR RESCANNING - An efficient method and system to enhance digital acquisition devices for analog data is presented. The enhancements offered by the method and system are available to the user in local as well as in remote deployments yielding efficiency gains for a large variety of business processes. The quality enhancements of the acquired digital data are achieved efficiently by employing virtual reacquisition. The method of virtual reacquisition renders unnecessary the physical reacquisition of the analog data in case the digital data obtained by the acquisition device are of insufficient quality. The method and system allows multiple users to access the same acquisition device for analog data. In some embodiments, one or more users can virtually reacquire data provided by multiple analog or digital sources. The acquired raw data can be processed by each user according to his personal preferences and/or requirements. The preferred processing settings and attributes are determined interactively in real time as well as non real time, automatically and a combination thereof. | 08-27-2009 |
Prashanth Asuri, Troy, NY US
| Patent application number | Description | Published |
|---|---|---|
| 20090143487 | Enhanced stability of proteins immobilized on nanoparticles - This invention is directed to the application of a previously unknown property of nanomaterials—its ability to enhance protein activity and stability at high temperatures, in organic solvents, and in polymer composites. Nanomaterials such as single-walled carbon nanotubes (SWNTs) can significantly enhance enzyme function and stability in strongly denaturing environments. Experimental results and theoretical analysis reveal that the enhancement in stability is a result of the curvature of these nanoscale materials, which suppresses unfavorable protein-protein interactions. The enhanced stability is also exploited in the preparation of highly stable and active nanocomposite films that resist nonspecific protein absorption, i.e., inhibit fouling of the films. The protein-nanoparticles conjugates represent a new generation of highly selective, active, and stable catalytic materials. Furthermore, the ability to enhance protein function by interfacing them with nanomaterials has a profound impact on applications ranging from biosensing, diagnostics, vaccines, drug delivery, and biochips, to novel hybrid materials that integrate biotic and abiotic components. | 06-04-2009 |