Ramanan
Ramanan Bairavasubramanian, Hiawatha, IA US
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20150133186 | MULTIMODE POWER AMPLIFIER BIAS CIRCUIT WITH SELECTABLE BANDWIDTH - Multimode power amplifier bias circuit with selectable bandwidth. In some embodiments, a bias circuit for a power amplifier can include a first bipolar junction transistor (BJT) configured to pass a reference current. The first BJT can be coupled with a second BJT that performs at least some amplification for the power amplifier. The first and second BJTs can be configured as a current mirror. The bias circuit can further include a coupling circuit that couples the collector and the base of the first BJT. The coupling circuit can include a switchable element to allow the coupling circuit to be in a first state or a second state. The first state can be configured to yield a first bandwidth for the bias circuit, and the second state can be configured to yield a second bandwidth for the bias circuit. | 05-14-2015 |
Ramanan Bairavasubramanian 1, Atlanta, GA US
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20100090902 | MULTILAYER ELECTRONIC COMPONENT SYSTEMS AND METHODS OF MANUFACTURE - Multilayer electronic component systems and methods of manufacture are provided. In this regard, an exemplary system comprises a first layer of liquid crystal polymer (LCP), first electronic components supported by the first layer, and a second layer of LCP. The first layer is attached to the second layer by thermal bonds. Additionally, at least a portion of the first electronic components are located between the first layer and the second layer. | 04-15-2010 |
Ramanan Chebiam, Hillsboro, OR US
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20080213994 | Treating a liner layer to reduce surface oxides - In one embodiment, the present invention includes a method for depositing a barrier layer on a substrate having a trench, depositing a liner layer on the barrier layer that includes a surface oxide, electrolessly depositing a copper seed layer on the liner layer, where the surface oxide is reduced in-situ in an electroless bath, depositing a bulk metal layer on the copper seed layer. Other embodiments are described and claimed. | 09-04-2008 |
20090166867 | METAL INTERCONNECT STRUCTURES FOR SEMICONDUCTOR DEVICES - Cu interconnect structures using a bottomless liner to reduce the copper interfacial electron scattering and lower the electrical resistance are described in this application. The interconnect structures comprise a nucleation layer and a liner layer that may be formed by an oxide or nitride. The bottom portion of the liner layer is removed to expose the nucleation layer. Since the liner is bottomless, the nucleation layer is exposed during Cu deposition and serves to catalyze copper nucleation and enable selective growth of copper near the bottom (where the nucleation layer is exposed), rather than near the liner sidewalls. Thus, copper may be selectively grown with a bottom-up fill behavior than can reduce or eliminate formation of voids. Other embodiments are described. | 07-02-2009 |
20090315185 | SELECTIVE ELECTROLESS METAL DEPOSITION FOR DUAL SALICIDE PROCESS - A method for forming dual salicide contacts includes depositing a low or mid-gap work function metal selectively on an NMOS source/drain (S/D) region of a semiconductor device via electroless deposition; depositing a high work function metal selectively over the low work function metal and a PMOS source/drain (S/D) region of a semiconductor device via electroless deposition; annealing the semiconductor device to form a silicide of the low work function metal over the NMOS source/drain (S/D) region and a silicide of the high work function metal over the PMOS source/drain (S/D) region; and performing a SALICIDE etch to remove the unreacted metals from all regions of the substrate. | 12-24-2009 |
Ramanan Ganeshananthan, Burlington, MA US
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20090035633 | Chemically sintered composite electrodes and manufacturing processes - An iterative process of depositing on a solid electrolyte a coating of unconnected particles composed of an ionically conductive material. A liquid solution is also applied. The liquid solution includes an inorganic component. The deposited liquid is heated to a temperature sufficient to evaporate or otherwise remove some or all of the volatile components of the liquid solution. Typically the temperature is below 1000° and often at about 850° C. The effect of heating the solution is to cause ion conducting material in the solution to adhere to the surface of the existing ion conducting particles and form connections between these particles. This is understood to create an ion conducting skeletal support structure. Within the intrestices of this skeletal support structure, the step of heating is also understood to result in the deposition of the inorganic component that will begin to form a electron conducting structure. The process of applying the liquid solution and heating may be repeated until a sufficiently thick layer of material is laid over the solid electrolyte to provide the composite electrode structure desired. | 02-05-2009 |
Ramanan Krishnamoorti, Bellaire, TX US
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20090030090 | Carbon nanotube reinforced polymer nanocomposites - The present invention is directed to carbon nanotube (CNT)/polymer composites, i.e., nanocomposites, wherein the CNTs in such nanocomposites are highly dispersed in a polymer matrix, and wherein the nanocomposites comprise a compatibilizing surfactant that interacts with both the CNTs and the polymer matrix. The present invention is also directed to methods of making these nanocomposites. In some such methods, the compatibilizing surfactant provides initial CNT dispersion and subsequent mixing with a polymer. The present invention is also directed to methods of using these nanocomposites in a variety of applications. | 01-29-2009 |
20090221738 | NANOCOMPOSITES OF POLYMERS WITH DISPERSED NANOTUBES - The present invention provides polymer nanocomposites with dispersed nanotubes and methods of making same. The polymer may be a polyether. For example, the present invention provides an effective method to successfully disperse single walled nanotubes (SWNTs) into both Polyethylenoxide (PEO) and its low molecular weight analog polyethylene glycol (PEG) with hydrodynamic percolation at about 0.09 wt % and an electrical percolation at about 0.03 wt % SWNTs at room temperature, and the resulting nanocomposites. The method may include providing a surfactant. Most notably the present inventors achieved a decrease in the melting point of the polymer and a retardation of polymer crystallization due to the presence of the nanotubes. | 09-03-2009 |
20100090175 | NANOCOMPOSITES OF POLYMERS WITH DISPERSED NANOTUBES - The present invention provides polymer nanocomposites with dispersed nanotubes and methods of making same. The polymer may be a polyether. For example, the present invention provides an effective method to successfully disperse single walled nanotubes (SWNTs) into both Polyethylenoxide (PEO) and its low molecular weight analog polyethylene glycol (PEG) with hydrodynamic percolation at about 0.09 wt % and an electrical percolation at about 0.03 wt % SWNTs at room temperature, and the resulting nanocomposites. The method may include providing a surfactant. Most notably the present inventors achieved a decrease in the melting point of the polymer and a retardation of polymer crystallization due to the presence of the nanotubes. | 04-15-2010 |
20110081494 | Organoclay-Polyurea Nanocomposites - A nanocomposite having a nanomaterial dispersed into a polymer matrix, in one embodiment exfoliated nanoclay dispersed in a polyurea matrix. A method of making PU-nanocomposites for coatings for improved mechanical properties, in one embodiment the method comprises obtaining and treating a nanomaterial, dispersing the nanomaterial into a pre-polymer matrix, mixing the pre-polymer matrix under heating to form a coating; and depositing the coating on a substrate. | 04-07-2011 |
Ramanan Lakshminarayanan, Bangalore IN
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20110309944 | PATIENT TABLE SYSTEM FOR MEDICAL SYSTEM FOR MEDICAL APPLICATIONS AND ASSOCIATED MEDICAL IMAGING DEVICE - A patient table system for medical applications is provided. The table system comprises: a table top; at least one sensor configured to measure information representative of a pressure exerted by a patient on the table top when the patient is in a lying position; and a safety detector configured to compare the measured information with reference data of the table top mechanical resistance and to provide an alert depending on the result of the comparison. | 12-22-2011 |
Ramanan Laxminarayan, Bethesda, MD US
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20140019394 | PROVIDING EXPERT ELICITATION - Systems and methods of providing expert elicitation are provided. Expert information may be stored in an expert database. A request for expert opinion may be received. A plurality of experts may be selected. A plurality of seed questions and target questions may be generated and sent to the experts selected. Answers to the questions may be received. A performance-based weight may be assigned to each expert based on the answers of the seed questions. Expert opinion may be generated based on the performance-based weight and answers to the target questions. The expert opinion may be provided. | 01-16-2014 |
Ramanan Sivaranjan, Toronto CA
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20120254829 | METHOD AND SYSTEM TO PRODUCE SECURE SOFTWARE APPLICATIONS - This invention relates to a method and system of providing security guidance in writing software applications. More particularly this invention relates to accessing guidance application linked to a computer and a data base of security features to present a user with suggestive security content in writing software applications. The invention also relates to a non-transitory computer program for use on the computer in writing the software applications. | 10-04-2012 |
Ramanan Thiagarajah, Collegeville, PA US
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20150127364 | Preauthorization Management System - A preauthorization management system. The preauthorization management system allows a health care provider to submit a preauthorization request and track the status of the preauthorization request until a final determination is reached. Once a request has been submitted, the preauthorization management system monitors the status of the request until a final disposition is reached. The preauthorization management system documents the submission and determination process to provide a record that may be used to show an event or outcome occurred. The preauthorization management system offers a simplified and uniform system for managing preauthorization for health care services that reduces or eliminates the need for health care providers to learn diverse systems and procedures of a multitude of health insurance providers. | 05-07-2015 |
Ramanan Thirumoorthy, Chennai IN
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20150240282 | MUTATED CEPHALOSPORIN HYDROXYLASE AND ITS APPLICATION IN DEACETYLCEPHALOSPORANIC ACID SYNTHESIS - A mutant hydroxylase with increased activity and greater substrate specificity towards phenylacetyl-7-ADCA derivatives for the production of phenylacetyl-7-HACA derivatives, which carries one or more amino acid modification at residue positions when compared with certain wild type hydroxylase from certain groups of residues. Also disclosed is a process for the preparation of deacetyl cephalosporanic acid from the corresponding deacetoxy cephalosporanic acid that includes an enzyme of the present invention. Also provided is a method for the production and processing of such enzymes. | 08-27-2015 |