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Hsing, CA

Michael Hsing, Saratoga, CA US

Patent application numberDescriptionPublished
20090302931LOW-POWER VOLTAGE REFERENCE - A circuit provides a voltage reference using very low power. It can also be used as a shut regulator for a quiescent current as low as 1.5μA. It includes a transconductance amplifier, a gain stage, and a power transistor. One embodiment of this invention utilizes a work function difference between p12-10-2009

Patent applications by Michael Hsing, Saratoga, CA US

Michael R. Hsing, Saratoga, CA US

Patent application numberDescriptionPublished
20100252918MULTI-DIE PACKAGE WITH IMPROVED HEAT DISSIPATION - The present invention discloses a multi-die package which facilitates heat dissipation for a high power consumption die. In the package, part of the lead frame is bent so as to be exposed at the surface of the package. On the opposite side of the exposed surface, a high power consumption die is attached. The other die with lower power consumption is not at the surface of the multi-die package.10-07-2010
20100302810VOLTAGE CONVERTERS WITH INTEGRATED LOW POWER LEAKER DEVICE AND ASSOCIATED METHODS - Voltage converters with integrated low power leaker device and associated methods are disclosed herein. In one embodiment, a voltage converter includes a switch configured to convert a first electrical signal into a second electrical signal different than the first electrical signal. The voltage converter also includes a controller operatively coupled to the switch and a leaker device electrically coupled to the controller. The controller is configured to control the on and off gates of the switch, and the leaker device is configured to deliver power to the controller. The leaker device and the switch are formed on a first semiconductor substrate, and the controller is formed on second semiconductor substrate separate from the first semiconductor substrate.12-02-2010
20110062554HIGH VOLTAGE FLOATING WELL IN A SILICON DIE - In one embodiment, a graded n-doped region surrounding a well, and a spiral resistor connected to the well and to a p-doped region surrounding the graded n-doped region.03-17-2011
20110068377HIGH VOLTAGE JUNCTION FIELD EFFECT TRANSISTOR WITH SPIRAL FIELD PLATE - In one embodiment, a junction field effect transistor having a substrate, wherein formed on the substrate is a graded n-doped region having a high doping concentration in an inner region and a low doping concentration in an outer region, with a p-doped buried region adjacent to the graded n-doped region near the outer region, and a spiral resistor connected to the graded n-doped region at its inner region and at its outer region. An ohmic contact at the inner region provides the drain, an ohmic contact at the outer region provides the source, and an ohmic contact at the substrate provides the gate.03-24-2011
20110068410SILICON DIE FLOORPLAN WITH APPLICATION TO HIGH-VOLTAGE FIELD EFFECT TRANSISTORS - A floorplan for a die having three high-voltage transistors for power applications is described. The three high-voltage transistors are specifically placed in relation to each other to optimize operation.03-24-2011
20110084333POWER DEVICES WITH SUPER JUNCTIONS AND ASSOCIATED METHODS MANUFACTURING - Power devices with super junctions and associated methods of manufacturing are disclosed herein. In one embodiment, a method for forming a power device includes forming an epitaxial layer on a substrate material and forming a trench in the epitaxial layer. The trench has a first sidewall, a second sidewall, and a bottom between the first and second sidewalls. The method also includes forming an insulation material on at least one of the first and second sidewalls of the trench and diffusing a dopant into the epitaxial layer via at least one of the first and second sidewalls of the trench via the insulation material.04-14-2011

Patent applications by Michael R. Hsing, Saratoga, CA US

Michael Ren Hsing, Saratoga, CA US

Patent application numberDescriptionPublished
20090206763METHOD AND APPARATUS FOR CONTROLLING A DISCHARGE LAMP IN A BACKLIGHTED DISPLAY - The described DC to AC inverter efficiently controls the amount of electrical power used to drive a cold cathode fluorescent lamp (CCFL). The output is a fairly pure sine wave which is proportional to an input control voltage. The output waveform purity is ensured by driving a symmetrical rectangular waveform into a second-order, low pass filter at the resonant frequency of the filter for all conditions of line voltage and delivered power. Operating stress on the step-up transformer is minimized by placing the load (lamp) directly across the secondary side of the transformer. When configured to regulate delivered power, the secondary side may be fully floated which practically eliminates a thermometer effect on the operation of the lamp. All of the active elements, including the power switches, may be integrated into a monolithic silicon circuit.08-20-2009