Giannopoulos
Demetri Giannopoulos, Austin, TX US
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20110071700 | Auto-Compensating Power Converter - An auto-compensation method for compensating power regulators configured to generate a regulated output voltage. Auto-compensation may be performed dynamically by determining various coefficients of a compensation function used in compensating the power regulator, based on assumptions about the structure of the regulator and corresponding filters. The method may be used to determine at least the DC loop gain and the position of the compensation zeros, without requiring any prior knowledge of the values of the various components of the system. Furthermore, the selection of the compensation parameters (loop gain, position of zeroes) may be based on measurement of various state variables of the actual power converter, and adjustment of the various coefficients of the compensation function according to the measurements. Since no power-plant model of the power regulator is used, inaccuracies that would be inherent using any method that employs a model of the system instead of the system itself may be eliminated. | 03-24-2011 |
Demetri J. Giannopoulos, Austin, TX US
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20130249518 | Current-Sensing Auto-Calibration in Power Converters - An electronic circuit (EC) may include an integrated current-source with an output terminal that may couple to the output of a power converter (OPC) to draw current from the power converter. The EC may further include control circuitry for activating the integrated current-source and for effecting a ramping output voltage at the OPC, and begin current-sense calibration once the output voltage reaches a specified calibration voltage value (SCVV). The control circuitry may regulate the output voltage to the SCVV while current-sense calibration is being performed, to measure and store the resistance value of a current-sense element of the power regulator. With the current-sense calibration complete, the control circuitry may disable the integrated current-source, resume ramping the output voltage until it reaches a specified regulation value (SRVV), and regulate to the SRVV during normal operation. The SCVV is specified to be at least a magnitude lower than the SRVV. | 09-26-2013 |
20130285628 | Integrated Power Supply with Wide Input Supply Voltage Range - A novel integrated switched mode power supply circuit that provides supply voltages to an integrated circuit may be of minimal complexity and have the capacity for a wide range of input supply voltages. The novel power supply may include cascaded, unregulated step-down charge pumps (e.g. unregulated voltage splitters), one or more linear regulators coupled to the output of the cascaded voltage splitters, and a start-up current source to provide the IC supply current until the input supply voltage is sufficiently high for the voltage splitter(s) to be functional to provide the IC supply current. Furthermore, each voltage splitter may be activated or disabled depending on the value of the input supply voltage, and the input of a disabled voltage splitter may be shorted to its output via an integrated power switch. Using (cascaded) voltage splitters to provide the IC supply current reduces overall power dissipation in the IC. | 10-31-2013 |
Demetri J. Giannopoulos, Norwalk, CT US
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20090123161 | LED SYSTEM FOR ILLUMINATION AND DATA TRANSMISSION - A LED system ( | 05-14-2009 |
George Giannopoulos, Oakleigh AU
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20100101027 | Innerspring Mattress System - There is disclosed a mattress comprising a first border member configured to define an upper periphery of the mattress and a second border member configured to define a lower periphery of the mattress. At least two spring assemblies are positioned within the first and second border members so as to extend between the first and second border members. Each spring assembly comprises an array of coil springs and each spring assembly is positioned such that the coil springs of one spring assembly are not directly connected with coil springs of any other spring assembly. | 04-29-2010 |
20120311791 | Innerspring Mattress System - There is disclosed a mattress comprising a first border member configured to define an upper periphery of the mattress and a second border member configured to define a lower periphery of the mattress. At least two spring assemblies are positioned within the first and second border members so as to extend between the first and second border members. Each spring assembly comprises an array of coil springs and each spring assembly is positioned such that the coil springs of one spring assembly are not directly connected with coil springs of any other spring assembly. | 12-13-2012 |
George Giannopoulos, Moorabbin AU
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20140096325 | BEDDING SYSTEM - A mattress for a bedding unit. The mattress comprises a body having a first support surface and a second support surface. Each of the first support surface and the second support surface is configured to support a user thereon and each of the first and second support surfaces have a different level of firmness. At least one top portion is removably attachable to either of the first or second support surfaces of the body. The at least one top portion has a level of firmness less than the level of firmness of the first and second support surfaces such that when the top portion is attachable to either of the first or second support surface, the level of firmness of the first or second support surface is reduced. An overall level of firmness of the mattress can be altered by the user selecting either the first or second support surface alone or in combination with the at least one top portion to provide the overall level of firmness of the mattress that is acceptable to the user. | 04-10-2014 |
Nicholas C. Giannopoulos, Canton, GA US
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20120205843 | SPRINGLESS COMBINATION SHOCK ABSORBER AND SUSPENSION APPARATUS, AND METHOD OF USE - A springless combination shock absorber and suspension apparatus comprising three tubes: An outer tube, a piston tube (inner tube) and a stationary (damping) tube, with a floating piston disposed in the inner piston tube, wherein the floating piston forms two chambers therein, a lower liquid chamber and an upper gas chamber. Fluid dampens shocks by passing through a two-way valve in the outer tube and may be controlled internally by a shim plate positioned over apertures or valve passageways, or, in a separate embodiment, by external adjustment of flow by rotating adjusting plates to open and close the valve passageways. The amount by which the gas chamber is reduced in compression is large enough to generate the high pressures required to produce spring-like forces. This design allows the gas pressure chamber to operate effectively as a spring. | 08-16-2012 |
Panagiotis Giannopoulos, Ilion GR
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20150290819 | SHAVER - A shaver is provided, the shaver including a handle with an elongated handgrip portion and a mounting portion, a shaver head pivotally attached to the mounting portion, a removable cartridge including at least one blade, the cartridge being adapted to be attached to the shaver head and removed from the shaver head, a pusher, adapted to encounter the cartridge to release the cartridge from the shaver head, and a spring provided on the shaver head, the spring being adapted to attach the cartridge to the shaver head, the spring comprising at least one part which forms a loop. | 10-15-2015 |
Rene C. Giannopoulos, Canton, GA US
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20080233336 | Carpet Tiles and Methods Of Making Same - Modular carpet tiles having multiple layers are described, including a laminate layer having a compatibilizing agent. The laminate layer can include at least one polyolefin functionalized with at least one unsaturated organic acid and/or at least one unsaturated organic acid anhydride, such as maleic anhydride. The functionalized polyolefin can have an acid number from about 5 to about 55 mg KOH/g. Methods of making the tiles are also described. | 09-25-2008 |