Dasgupta
Arup Ranjan Dasgupta, Karnataka State JP
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20100070638 | SYSTEM AND A METHOD FOR SECURED DATA COMMUNICATION IN COMPUTER NETWORKS BY PHANTOM CONNECTIVITY - The present invention provides a system for providing a higher level security to data communication in computer networks, said system comprising; an organizational network, at least a third party network, at least a phantom server with an intermediate data storage, a toggling means disposed to isolate the organizational network from the third party network and said toggling means further disposed to permit secured data communication between the organizational network and the third party network through the phantom server. A method for providing a higher level security to data communication in computer networks by effecting the transmission of data between organizational network and the third party network by toggling means through phantom server. | 03-18-2010 |
Rajshekar Dasgupta, Toronto CA
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20150056513 | POWDER COMPRISING CARBON NANOSTRUCTURES AND ITS METHOD OF PRODUCTION - A powder comprises a plurality of carbon nanostructures, with at least a portion of the carbon nanostructures defining an internal cavity that contains metallic lithium, a lithium compound, or a lithium alloy comprising lithium. A method of forming the powder involves the electrolytic disintegration of a graphite electrode in a lithium-bearing molten salt to form the carbon nanostructures, and a step of removing salt from the nanoparticles without removing lithium. A lithium battery anode comprising an anode comprising the powder as a layer on an electrically conductive substrate. | 02-26-2015 |
Sankar Dasgupta, Mississauga CA
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20100075232 | COMPOSITE POLYMER ELECTROLYTES FOR A RECHARGEABLE LITHIUM BATTERY - The composite electrolyte for use in a thin plate rechargeable lithium battery comprises a porous or micro-porous inert, multi-layered polymer separator laminate which carries an adherent second polymer coating containing a dissociable lithium compound, and the multi-layered separator having adherent solid second polymer layer, is impregnated with an organic liquid containing another lithium salt. The porous or micro-porous separator laminate is made of multiple polymer layers, at least one of the member layers having melting temperature at least 20-C below the melting temperature of the other polymer member layers. The composite porous electrolyte is inserted between the electrodes of a rechargeable lithium battery. In another embodiment the porous polymer separator sheet has an adherent, dissociable lithium compound containing, solid second polymer layer on each of its major faces. | 03-25-2010 |
Santanu Dasgupta, Uppsala SE
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20110104180 | NEW VACCINE FOR THE TREATMENT OF MYCOBACTERIUM RELATED DISORDERS - The invention relates to genes and proteins involved in the sporulation of Mycobacteria and the use thereof in the technical fields of immunology and medicine. A vaccine comprising spore forming peptides, such as CotA or CotD, or antibodies thereto is used for the treatment of diseases caused by | 05-05-2011 |
20140335536 | VACCINE FOR THE TREATMENT OF MYCOBATERIUM RELATED DISORDERS - The invention relates to genes and proteins involved in the sporulation of | 11-13-2014 |
Shivaji N. Dasgupta, Dhahran SA
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20090299637 | Continuous Reservoir Monitoring for Fluid Pathways Using Microseismic Data - A system and method monitor a hydrocarbon reservoir for drainage in volumetric three dimensions. Monitoring between wells is imperative for optimum reservoir management and is achieved by mapping the hydrocarbon fluid pathways in a producing reservoir. Unlike conventional 4D or time-lapse reflection seismic imaging systems that use a controlled active seismic source and records reflected seismic energy at receivers, the system and method exploit the minute vibrations, or micro-earthquakes generated in the reservoir layers that are induced by fluid movement. These microseisms are detected as the fluids move in the reservoir. | 12-03-2009 |
20130282291 | MONITORING OF RESERVOIR FLUID MOVING ALONG FLOW PATHWAYS IN A PRODUCING OIL FIELD USING PASSIVE SEISMIC EMISSIONS - A system of and method for determining whether a liquid moving in an oil-bearing reservoir rock formation is water or oil is provided. The oil-bearing rock formation includes at production well(s) and source(s) of injected water during normal oil production. A fluid pathway is identified, baseline number of passive microseismic events is established, passive microseismic events in the fluid pathway are monitored during oil production to sense microseismic events, the sensed microseismic events are compared to a baseline number of passive microseismic events. The fluid causing the microseismic events is determined to be water if the sensed number of microseismic events approaches the baseline number of passive microseismic events per the predetermined unit, and if the baseline number of passive microseismic is measured during a time period when the water injection is greater than the rate of water injection during normal oil production. | 10-24-2013 |
Subho Dasgupta, Eggenstein-Leopoldshafen DE
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20140319466 | ELECTROCHEMICALLY-GATED FIELD-EFFECT TRANSISTOR, METHODS FOR ITS MANUFACTURE, ITS USE, AND ELECTRONICS COMPRISING SAID FIELD-EFFECT TRANSISTOR - An electrochemically-gated field-effect transistor includes a source electrode, a drain electrode, a gate electrode, a transistor channel and an electrolyte. The transistor channel is located between the source electrode and the drain electrode. The electrolyte completely covers the transistor channel and has a one-dimensional nanostructure and a solid polymer-based electrolyte that is employed as the electrolyte. | 10-30-2014 |
Suryaasrathi Dasgupta, Paris FR
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20090317373 | Inhibition of the Anti-FVIII Immune Response - The invention relates to a compound capable of inhibiting the endocytosis of FVIII (factor VIII) by immune system cells capable of endocytosing the antigen and to the therapeutic use of such a compound for the manufacture of a medicament for use in the treatment of hemophiliacs in order to reduce the immunogenicity of FVIII and/or increase the half-life of FVIII. | 12-24-2009 |
Uday Dasgupta, Singapore SG
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20090295477 | AHUJA COMPENSATION CIRCUIT FOR OPERATIONAL AMPLIFIER - A frequency compensated operational amplifier includes: an input stage, for receiving an input signal; an output stage, coupled to the input stage, for generating an output signal according to an output of the input stage; a first current source, for providing a first bias current; a second current source, for providing a second bias current identical to the first bias current; an Ahuja compensation circuit, comprising: a matched transistor pair, coupled to the first current source and the second current source; a capacitor coupled between the matched transistor pair and the output stage; and a transconductance boosting circuit, coupled to the matched transistor pair, for boosting transconductance of the matched transistor pair. | 12-03-2009 |
20090295482 | DRIVING AMPLIFIER CIRCUIT WITH DIGITAL CONTROL - A driving amplifier circuit includes: a first driver for souring a load current to a load; a second driver for sinking the load current from the load; a first operational amplifier (op-amp) coupled to a differential input signal for driving the first driver; a second operational amplifier coupled to the differential input signal for driving the second driver; a first bias circuit for biasing the first driver; a second bias circuit for biasing the second driver; an enabling circuit, coupled to the first bias circuit and the second bias circuit, for enabling either the first bias circuit or the second bias circuit according to a control signal; and a digital control circuit, coupled to the enabling circuit, for monitoring currents of the first driver and the second driver to generate the control signal. | 12-03-2009 |
20100039175 | DRIVING AMPLIFIER CIRCUIT WITH DIGITAL CONTROL AND DC OFFSET EQUALIZATION - A driving amplifier circuit includes: a first driver for sourcing a load current to a load; a second driver for sinking the load current from the load; a first operational amplifier (op-amp) for driving the first driver; a second operational amplifier for driving the second driver; a first bias circuit for biasing the first driver; a second bias circuit for biasing the second driver; an enabling circuit for enabling either the first bias circuit or the second bias circuit according to a control signal; a digital control circuit for monitoring currents of the first driver and the second driver to generate the control signal; and an offset equalization circuit, coupled between an internal node of the first operational amplifier and an internal node of the second operational amplifier, for adjusting DC offset of at least one of the first operational amplifier and the second operational amplifier. | 02-18-2010 |
20100066320 | Integrated LDO with Variable Resistive Load - To provide adequate compensation for a wide range of output loads, a low dropout (LDO) regulator has an amplifier, a pass transistor, a voltage divider, a compensation network, and a control circuit. The amplifier outputs a comparison result according to a reference signal and a feedback signal. The pass transistor generates an output current based on the comparison result of the amplifier. The voltage divider generates the feedback signal according to the output current. The compensation network couples the output of the pass transistor to a low-impedance node of the amplifier, and has a compensation capacitor and a variable resistor coupled to the compensation capacitor. The control circuit is coupled to the input of the pass transistor and to the variable resistor for controlling resistance of the variable resistor according to the output current of the pass transistor. | 03-18-2010 |
20100066449 | THREE-STAGE FREQUENCY-COMPENSATED OPERATIONAL AMPLIFIER FOR DRIVING LARGE CAPACITIVE LOADS - A three-stage frequency-compensated operational amplifier includes a first-stage circuit, a second-stage circuit incorporated with a first compensation circuit, a third-stage circuit, and a second compensation circuit. The three-stage frequency-compensated operational amplifier functions as a two-stage operational amplifier at high frequencies, thereby capable of driving large capacitive loads with low power consumption. | 03-18-2010 |
20110193540 | Enhancement of Power Supply Rejection for Operational Amplifiers and Voltage Regulators - A scheme for enhancement of the power-supply ripple rejection for operational amplifiers (op-amps) and low-dropout (LDO) voltage regulators is described. The scheme adds calculated amounts of current derived from the power-supply ripple with the input differential pair current to cancel off the output ripple, improving the high-frequency power-supply ripple rejection without requiring a substantial redesign of the circuitry involved. | 08-11-2011 |
20140292387 | LOCK DETECTOR BASED ON CHARGE PUMP - A phase lock loop having a lock detector is provided. The lock detector is based on a replica charge pump and includes: a charge pump, a filter and a comparing circuit. The charge pump is arranged for providing an output according to a phase difference between an output signal and a reference signal. The filter is coupled to the charge pump, and is arranged for filtering the output of the charge pump to generate a filtered output voltage. The comparing circuit is coupled to the filter, and is arranged for comparing the filtered output voltage with a threshold setting to generate a lock indication signal to indicate whether the output signal is locked to the reference signal. | 10-02-2014 |