Patent application number | Description | Published |
20100196283 | METHOD AND IMAGING MEDIUM FOR USE IN THE METHOD - The invention relates to a method of | 08-05-2010 |
20100233096 | METHOD TO PRODUCE HYPERPOLARISED CARBOXYLATES AND SULPHONATES - The invention relates to a dynamic nuclear polarisation method for producing hyperpolarised carboxylates or sulphonates or mixtures thereof wherein the carboxylate or sulphonate used in the method of the invention comprises certain inorganic cations. The invention further relates to compositions for use in that method. | 09-16-2010 |
20100310467 | COMPOSITION AND METHOD FOR GENERATING A METABOLIC PROFILE USING 13C-MR DETECTION - The invention relates to a method of | 12-09-2010 |
20110008261 | METHOD TO PRODUCE HYPERPOLARISED AMINO ACIDS AND AMINOSULPHONIC ACIDS - The invention relates to a dynamic nuclear polarisation (DNP) method for producing hyperpolarised amino acids and amino sulphonic acids and compositions for use in the method. As a sample, an ammonium salt of an amino acid, an ammonium salt of an aminosulphonic acid, a carboxylate salt of an amino acid, a sulphonate salt of an aminosulphonic acid or mixtures thereof is used. | 01-13-2011 |
20110033390 | MR IMAGING AGENT OR MEDIUM COMPRESSING HYPERPOLARISED 13C ALANINE AND METHODS OF IMAGING WHEREIN SUCH AN IMAGING MEDIUM IS USED - The invention relates to hyperpolarised | 02-10-2011 |
20110038804 | MR IMAGING AGENT, IMAGING MEDIUM AND METHODS OF IMAGING WHEREIN SUCH AN IMAGING MEDIUM IS USED - The invention relates to hyperpolarised | 02-17-2011 |
20110243855 | METHOD AND IMAGING MEDIUM FOR USE IN THE METHOD - The invention relates to a method of | 10-06-2011 |
20130096420 | Process For Preparing Hyperpolarized Substrates And Method For MRI - The present invention generally relates to a process for the preparation of aqueous solutions of hyperpolarized molecules ready for use in in-vivo MR diagnostic imaging, the use thereof as MRI contrast agent in investigation methods for producing diagnostic MR images of a human or non-human animal body organ, region or tissue. | 04-18-2013 |
20140257085 | Process For The Preparation Of Hyperpolarized Derivatives For Use In MRI Analysis - The present invention relates to a process for the preparation of aqueous solutions of hyperpolarized carboxylic organic acids ready for use in in-vivo MR diagnostic imaging, and the use of the corresponding anhydrides or esters as glass-forming agents. | 09-11-2014 |
20140328766 | COMPOSITION AND METHOD FOR GENERATING A METABOLIC PROFILE USING 13C-MR DETECTION - The invention relates to a method of | 11-06-2014 |
20140343402 | Composition Comprising Acetic Anhydride And A Gadolinium Complex, And Method For The Use In Hyperpolarisation In MRI Analysis - The present invention generally relates to a composition comprising acetic anhydride, a DNP agent and a gadolinium complex and its use for the preparation of hyperpolarised imaging agent for MR diagnostic analysis. | 11-20-2014 |
20150118159 | HYPERPOLARIZED AMINO ACIDS - Method for manufacturing a hyperpolarized amino acid, in particular glutamine, which substantially limits the formation of by-products, with respect to conventional aqueous preparations of sodium hydroxide with amino acids. The amino acid is in particular admixed with the hydroxide in the substantial absence of water and the dry mixture is dissolved in an anhydrous solvent in the presence of a polarizing agent. The obtained mixture is then subjected to a DNP process and can be used in metabolic MR imaging. | 04-30-2015 |
20150151009 | TRIARYLMETHYL RADICALS - New radical compounds, useful in the field of MRI imaging of formula (I). The radical compounds are in particular new triarylmethyl (“trityl”) radicals which can be used as polarizing agents for polarizing a molecule in the DNP process. | 06-04-2015 |
20150273086 | HYPERPOLARIZED 2-OXOGLUTARATE AS METABOLIC AGENT IN MR - Hyperpolarized 1- | 10-01-2015 |
Patent application number | Description | Published |
20120078556 | CURRENT MEASUREMENT IN SWITCHED MODE POWER SUPPLY - A method of determining a current in a switched mode power supply. The method comprises: storing values representing at least one pre-calculated matrix A; receiving measured current values; and using the stored values representing the matrix A and the received current values to calculate a respective initial value for each of the coefficients of the line and for each measured current value: calculating an estimated current using the equation of the line and the calculated initial values of the coefficients; determining a difference between the measured current value and the estimated current value to generate a difference value, and comparing the difference value against a threshold and, if the difference value is greater than the threshold, calculating updated values of the coefficients using stored values representing matrix A and difference value. A value for the current in the switched mode power supply is determined using the updated values of the coefficients | 03-29-2012 |
20120098334 | Intermediate Bus Architecture Power Supply Controller - A voltage controller ( | 04-26-2012 |
20120098553 | CAPACITANCE DETERMINATION IN A SWITCHED MODE POWER SUPPLY - A method of determining a measure of a total capacitance of one or more capacitive elements connected to an output of a switched mode power supply is described. The method includes generating a voltage control signal to cause an output voltage control signal age controller to sweep a voltage at the output of the switched mode power supply from an initial voltage value to a final voltage value. Sample values of a current at the output measured by a current sampler during the sweep of the output voltage are received, and an integrated current value representing a measure of the total capacitance using the received sample values is calculated. | 04-26-2012 |
20120200331 | DIGITAL CONTROL UNIT HAVING A TRANSIENT DETECTOR FOR CONTROLLING A SWITCHED MODE POWER SUPPLY - A switched mode power supply (SMPS) comprising a feedback unit, voltage feed forward (VFF) compensation signal generator and a transient detector. A VFF compensation signal is only applied to the output of the feedback unit when a transient is detected by the transient detector on the input voltage of the SMPS, thereby saving power and computation time. The transient detector comprises a first comparator to detect that a positive transient has occurred if a difference signal is greater than a positive threshold level; a second comparator to determine if the difference signal is within a predetermined range of positive values and output a result that indicates if the difference signal is within the predetermined range of positive values; and a first calculator to detect that a positive transient has occurred if, out of a first predetermined number of consecutive results of the output of the second comparator, there is at least a second predetermined number of results indicating that the difference signal is within the predetermined range of positive values. The transient detector comprises further features for similarly detecting a negative transient. | 08-09-2012 |
20120287681 | Switching Delay Controller for a Switched Mode Power Supply - A switching delay controller ( | 11-15-2012 |
20120319504 | CONTROL OF DYNAMIC BUS VOLTAGE IN AN INTERMEDIATE BUS ARCHITECTURE POWER SYSTEM - To reduce power loss in an intermediate bus architecture power system, embodiments of the present invention provide an intermediate bus converter which converts an input voltage to an intermediate bus voltage using a converting unit; receives a signal indicative of an output of a converting unit; determines an intermediate bus voltage to reduce power loss in dependence upon the signal indicative of an output of the converting unit; generates a control signal to control the converting unit to convert the input voltage to the determined intermediate bus voltage; and generates an intermediate bus voltage in dependence upon the control signal. | 12-20-2012 |
20130119962 | Intermediate Bus Architecture Power Supply Controller - A voltage controller is operable to generate control signals for controlling an intermediate bus voltage (V | 05-16-2013 |
20130141945 | Start-Up Procedure For An Isolated Switched Mode Power Supply - An isolated switched mode power supply, SMPS, comprises a switching controller operable to generate start-up switching control signals during start-up of the isolated SMPS, and operational switching control signals of period T during subsequent operation of the isolated SMPS. The SMPS further comprises a transformer having a primary winding and a full-bridge drive circuit arranged to drive the primary winding of the transformer in response to the switching control signals. The full-bridge drive circuit has: a first switching element and a boot-strap driving circuit arranged to switch the first switching element in response to the switching control signals, the boot-strap driving circuit having a boot-strap capacitor. The full-bridge drive circuit further comprises a second switching element connected to the first switching element and to the boot-strap driving circuit, and arranged to conduct a current to charge the boot-strap capacitor when switched ON in response to the switching control signals. The switching controller is operable to start up the isolated SMPS by: determining a duty cycle D for the operational switching control signals based on a voltage an output of the isolated SMPS and generating the start-up switching control signals comprising a first voltage pulse of duration P | 06-06-2013 |
20130155727 | ISOLATED SWITCHED MODE POWER SUPPLY - An isolated switched mode power supply comprises a transformer, with primary and secondary windings, and a rectification network connected to the secondary winding. The rectification network and the transformer are arranged such that, during a free-wheeling period of operation of the switched mode power supply, a magnetic flux from a first portion of a secondary winding of the transformer substantially cancels a magnetic flux from a second portion of the secondary winding between the first and second portions of the secondary winding. Additionally, a secondary side circuit connected to the secondary winding comprises a switching device, which is connected to a centre-tap, provided between the first and second portions of the secondary winding, and an output of the rectification network so as to conduct at least a part of a free-wheeling current flowing in the secondary side circuit during the free-wheeling period. | 06-20-2013 |
20130343094 | Controlling a Switched Mode Power Supply with Maximised Power Efficiency - A control circuit for a switched mode power supply (SMPS) has an input voltage reference voltage generator arranged to receive a signal indicative of an input voltage of the SMPS and is arranged to generate a reference signal directly proportional to the input voltage. An error signal generator of the control circuit is arranged to receive a signal indicative of an output voltage of the SMPS and arranged to generate an error signal based on the reference signal generated by the input reference voltage generator and based on the output voltage of the SMPS. A duty cycle control signal generator of the control circuit is arranged to generate a control signal, to control the duty cycle of the SMPS, in dependence upon the error signal. | 12-26-2013 |
20140167901 | PLANAR TRANSFORMER - A multi-layered printed circuit board, PCB, includes first windings for a first side of a planar magnetic transformer and second windings for a second side of the planar magnetic transformer. The PCB further includes conductive layers configured as the first windings, conductive layers configured as the second windings, and layers of an isolation material. Each layer of the isolation material is arranged between two conductive layers to provide electrical isolation between the two conductive layers. A group of two or more adjacent conductive layers are all conductive layers of the first windings and are all arranged between two conductive layers of the second windings. The thickness of the isolation material between the group of adjacent conductive layers of the first windings is less than the thickness of the isolation material between a conductive layer of the second windings and a conductive layer of the first windings. | 06-19-2014 |
20140327414 | METHOD FOR OPERATING A POWER CONVERTER MODULE AND A DEVICE THEREFOR - The present disclosure relates to methods, a system and a module for operating a power converter module. The power converter module comprises a voltage converter, an output circuitry and a processing circuitry operable for controlling the voltage converter. One method comprises transmitting a first status signal representing operating parameters of the voltage converter to the processing circuitry. Determining whether the first status signal of the voltage converter is acceptable. The method also comprises transmitting a second status signal representing the operating parameters of the output circuitry to the processing circuitry. The method also comprises determining if the second status signal is above a predetermined threshold value. When the second status signal is above said predetermined threshold value and the status of the voltage converter is acceptable, entering a peak output mode operating the voltage converter at maximum power dissipation. | 11-06-2014 |
20150028843 | METHOD FOR REMOTE CONTROL OF A POWER CONVERTER MODULE AND A DEVICE - The present disclosure relates to methods, systems and a module for operating a power converter module, the power converter module comprises a voltage source, a remote control terminal configured to be connected to a voltage potential for remote control of the power converter module. A voltage converter is configured to send an alarm signal, determine the voltage potential of the remote control terminal, and control an output voltage of the voltage converter at an output terminal of the power converter module based on the determined voltage potential of the remote control terminal. An alarm branch is configured to change the voltage potential of the remote control terminal by a voltage source in response to an alarm signal from the voltage converter when the remote control terminal is connected to a voltage potential, thereby causing the voltage converter to control the output voltage at the output terminal. | 01-29-2015 |
20150029760 | VOLTAGE FEED-FORWARD COMPENSATION AND VOLTAGE FEEDBACK COMPENSATION FOR SWITCHED MODE POWER SUPPLIES - A digital control unit generates a control signal to control a duty cycle of a switched mode power supply such that a faster response to an input voltage transient is achieved. The digital control unit comprises a feedback compensator, a feed forward compensator, a transient detector, and a controller. The transient detector receives a signal indicative of the input voltage of the switched mode power supply and detects transients on the received signal. The feedback compensator receives a signal indicative of the output voltage of the switched mode power supply and adjusts the control signal. The feed forward compensator receives a signal indicative of the input voltage of the switched mode power supply, performs a relatively fast, but coarse, adjustment of the control signal, and then performs a more accurate, but relatively slow, adjustment of the control signal. | 01-29-2015 |
20150055375 | Controlling a Switched Mode Power Supply with Maximised Power Efficiency - A control circuit, that controls the duty cycle of a switched mode power supply, comprises a reference voltage generator that, responsive to the input voltage exceeding a threshold value, generates a predetermined reference signal. Responsive to the input voltage not exceeding the threshold value, the reference voltage generator receives a signal indicative of an input voltage of the switched mode power supply and generates a variable reference signal dependent upon the input voltage. The control circuit further comprises an error signal generator that receives a signal indicative of an output voltage of the power supply and generates an error signal based on the reference signal generated by the reference voltage generator and based on the output voltage. The control circuit also includes a duty cycle control signal generator that generates the control signal to control the duty cycle of the power supply in dependence upon the error signal. | 02-26-2015 |
20150109825 | Controlling a Switched Mode Power Supply with Maximised Power Efficiency - A control circuit ( | 04-23-2015 |
20150138844 | SWITCHED MODE POWER SUPPLY WITH IMPROVED LIGHT LOAD EFFICIENCY - A control circuit operable to control the switching of switching elements in a switched mode power supply. The control circuit comprises a switching control signal generator operable to generate control signals for switching the switching elements such that the switched mode power supply converts an input voltage (V | 05-21-2015 |
20150180343 | Control of a synchronous rectifier - A method and a control unit for changing a working mode of a synchronous rectifier. The synchronous rectifier comprises at least one controllable switch having a diode in parallell thereof. The synchronous rectifier is operatively connected to a reactive circuit, and is arranged to receive at least one control signal at a control terminal, for controlling at least one controllable switch. The at least one control signal is pulse-width modulated with a defined duty-cycle. The method comprises adjusting the pulse-width of the at least one control signal between zero percent duty-cycle and the defined duty-cycle at a frequency above a cut-off frequency of the reactive circuit. Thereby, reducing the effect of a forward voltage drop over said diode in the synchronous rectifier. | 06-25-2015 |
20150222183 | VOLTAGE DROOP CONTROL IN A VOLTAGE-REGULATED SWITCHED MODE POWER SUPPLY - A switched mode power supply (SMPS) comprising a controller configured to control switching of the SMPS to regulate an output voltage at an output of the SMPS based on a feedback signal that indicates the output voltage, and a voltage droop control circuit. The voltage droop control circuit comprises a voltage droop control signal generator that detects a voltage drop across a component of the SMPS that is indicative of a current flowing through the output of the SMPS during operation. The voltage droop control signal generator is an active device arranged to generate, based on the detected voltage drop, an output voltage droop control signal for causing the controller to adjust the regulation of the output voltage. The voltage droop control circuit further comprises a reference voltage generator arranged to bias at least one of the first and second inputs of the voltage droop control signal generator. | 08-06-2015 |
20150244270 | INTERMEDIATE BUS ARCHITECTURE POWER SUPPLY - An intermediate bus architecture power supply system including an output voltage feedback-regulated, isolated first stage switching voltage converter (SVC) such as an intermediate bus converter, connected via an intermediate voltage bus (IVB) to at least one second stage DC-to-DC voltage converter. The first stage SVC is configured to adjust its switching duty cycle to compensate for voltage fluctuations on the IVB. The voltage regulation mechanism of the first stage SVC may thus suppress oscillations in the IVB voltage which originate from the first stage SVC's input or from fluctuations in the system's load current, and consequently reduce electromagnetic interference as well as the amplitude of voltage and current fluctuations on the IVB. | 08-27-2015 |
20150303804 | Switched Mode Power Supply Compensation Loop - An apparatus ( | 10-22-2015 |
20150331984 | SWITCHED MODE POWER SUPPLY OUTPUT FILTER CONFIGURATION - Method determines a configuration of capacitors in an output filter of a switched mode power supply (SMPS). Candidate configurations are generated, each associated with a respective cost function value calculated based on number of capacitors of each kind in the candidate configuration and cost assigned to each kind of capacitor. The candidate configurations are ordered based on their cost function values. A binary search through the ordered candidate configurations determines a capacitor configuration associated with a lowest cost function value to allow a defined load transient response requirement of the SMPS. Whether a candidate configuration allows the defined load transient response requirement of the SMPS is determined using a model of a SMPS having the candidate configuration of the output filter simulating deviation of output voltage of the SMPS in response to change in load current of the SMPS and determining whether the defined load transient response requirement is allowed. | 11-19-2015 |
20150333640 | Forward-Flyback Topology Switched Mode Power Supply - A switched mode power supply ( | 11-19-2015 |
20150340959 | Isolated Fly-Buck Converter, Switched Mode Power Supply, and Method of Measuring a Voltage on a Secondary Side of an Isolated Fly-Buck Converter - An isolated fly-buck converter provided for converting an input voltage (V | 11-26-2015 |