Patents Represented by Attorney, Agent or Law Firm George L. Kanabe
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Patent number: 6724174Abstract: Switching regulator circuits and methods are provided for regulating output voltage that include an adjustable minimum peak inductor current level for Burst Mode in current-mode DC-DC regulators. Minimum peak inductor current level control is achieved during Burst Mode by allowing external control for adjusting the burst threshold level. A single pin can be used to distinguish between forced continuous and Burst Mode as well as set the burst threshold level during Burst Mode, or an alternate method of setting a variable burst threshold level can be implemented in which two pins are used, one for selecting the mode of operation and the other for setting the burst threshold level during Burst Mode. The above principles can be applied to both step-up and step-down regulator circuit configurations, as well as both synchronous switching regulators and non-synchronous switching regulators.Type: GrantFiled: September 12, 2002Date of Patent: April 20, 2004Assignee: Linear Technology Corp.Inventors: Joey Martin Esteves, Randy Guy Flatness
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Patent number: 6712841Abstract: Methods and apparatus for treating hemorrhoids and similar ailments are disclosed in which one or more piece of material are used to separate swollen, inflamed tissue from non-swollen tissue, material may be included within an undergarment that may be worn for the treatment of ailments such as hemorrhoids or an episiotomy. The material incorporated into the undergarment has elastic properties that, in the case of hemorrhoids, acts to separate the buttocks. The undergarment may also include one or more pocket enclosures to hold cold compresses, ice packs, pain ointment, etc. directly upon, or in close proximity to, the affected area. Alternately, the material may be one or more single-use strips that include adhesive such that the strips act to separate the affected area from the non-affected area.Type: GrantFiled: February 12, 2001Date of Patent: March 30, 2004Assignee: Florez & Co.Inventor: Rebecca Gomez
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Patent number: 6670825Abstract: Interconnection block arrangements for selectively interconnecting logic on a programmable logic device is provided. Programmable logic connectors within the interconnection blocks may be programmed to route signals between the various conductors on the device and to route signals from various logic regions on the device to the various conductors. The interconnection blocks are arranged to optimize the use of metallization resources and to increase interconnectivity and logic density.Type: GrantFiled: December 13, 2002Date of Patent: December 30, 2003Assignee: Altera CorporationInventors: Christopher F. Lane, Giles V. Powell, Wayne Yeung, Chiakang Sung, Bruce B. Pedersen
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Patent number: 6657320Abstract: Integrated flywheel uninteruptible power supply (UPS) systems provide reliable back-up power protection in a single integrated housing unit. The integration of the two normally independent systems results in a synergism such that various components may be shared between the systems. For example, the flywheel unit and the UPS electronics unit may utilize a single cooling system that is less complex and requires less energy to operate than two independent cooling systems. Other shared components may include at least control circuitry, user and display interface circuitry, fusing, DC bus capacitors, and emergency shut-off circuitry.Type: GrantFiled: November 3, 1999Date of Patent: December 2, 2003Assignee: Active Power, Inc.Inventors: James A. Andrews, David A. Badger, Robert L. Fuller, Randal A. Lee, David E. Perkins, James R. Pitt, Dave J. Wehrlen
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Patent number: 6612519Abstract: The present invention discloses methods and apparatus for winding wire onto the slots on armature lamination stacks. More specifically, the present invention is directed to methods and apparatus for increasing time the winding components are operating on an armature winding system. The invention includes a loading/unloading unit and a holding unit that may be operated independently under most circumstances. The independent operation enables the winders of the present invention to operate at increased duty cycles, thereby increasing throughput. Additionally, the apparatus of the present invention increases the likelihood that armatures remain properly indexed during the loading transfer process to further increase system efficiency.Type: GrantFiled: October 27, 2000Date of Patent: September 2, 2003Assignee: Axis USA, Inc.Inventors: Raffaele Becherucci, Gianfranco Stratico, Maurizio Mugelli, Giovanni Manuelli
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Patent number: 6611131Abstract: A current-mode switching regulator that maintains a substantially constant maximum current limit over a virtually full range of duty cycles is provided. The regulator has a control circuit that includes a buffer circuit, an adjustable voltage clamp circuit, and a slope compensation circuit. The buffer circuit isolates a control signal from capacitive loading associated with control circuit. The threshold level of the adjustable voltage clamp circuit varies with respect to the amount of slope compensation provided to the voltage regulator. This allows a control voltage to increase as slope compensation increases so that a substantially constant maximum current limit is maintained.Type: GrantFiled: September 30, 2002Date of Patent: August 26, 2003Assignee: Linear Technology Corp.Inventor: Karl Edwards
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Patent number: 6522187Abstract: A CMOS switch with compensation circuitry that maintains linearized gate capacitance, said switch capable of selectively processing a signal independent of changes to gate capacitance current. The switch passes signals which are substantially insensitive to changes in source impedance. Thus, the switch processes an analog signal with a minimum of distortion as a result of gate capacitance currents.Type: GrantFiled: March 12, 2001Date of Patent: February 18, 2003Assignee: Linear Technology CorporationInventor: Joseph L. Sousa
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Patent number: 6512305Abstract: An uninterruptible power supply (UPS) system supplies power to computers, medical apparatus or other critical loads when primary power supply falters. The UPS system includes an electrical machine connected to a turbine that can be rotated by a motive fluid from a fluid supply. The electrical machine can be a dual purpose electrical machine (a motor/generator) or a two unit machine (one motor and one generator in a single housing or in separate housings) connected to the turbine. When power is supplied from the primary power supply to the critical load, the electrical machine acts as a motor to rotate the turbine and energy is stored by the turbine rotor in the form of rotational momentum. When power from the primary power supply falters, the rotational momentum of the turbine rotor initially rotates the electrical machine which acts as a generator to provide power to the critical load.Type: GrantFiled: June 16, 2000Date of Patent: January 28, 2003Assignee: Active Power, Inc.Inventors: Joseph F. Pinkerton, David B. Clifton
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Patent number: 6498466Abstract: A current-mode switching regulator that maintains a substantially constant maximum current limit over a virtually full range of duty cycles is provided. The regulator has a control circuit that includes a buffer circuit, an adjustable voltage clamp circuit, and a slope compensation circuit. The buffer circuit isolates a control signal from capacitive loading associated with control circuit. The threshold level of the adjustable voltage clamp circuit varies with respect to the amount of slope compensation provided to the voltage regulator. This allows a control voltage to increase as slope compensation increases so that a substantially constant maximum current limit is maintained.Type: GrantFiled: May 23, 2000Date of Patent: December 24, 2002Assignee: Linear Technology Corp.Inventor: Karl Edwards