Patents Represented by Attorney, Agent or Law Firm Paul N. Katz
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Patent number: 6180433Abstract: A combination inductive coil and integrated circuit semiconductor chip is provided in a single lead frame package. The lead frame is preferably made of a copper alloy and has a flat configuration. The chip is electrically connected to end portions of the inductive coil thus permitting the inductive coil to function as an antenna for the chip.Type: GrantFiled: January 15, 1999Date of Patent: January 30, 2001Assignee: Microchip Technology IncorporatedInventors: Lee Furey, Joseph Fernandez
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Patent number: 6139676Abstract: An apparatus and method is disclosed for removing a selected semiconductor chip from a semiconductor wafer. The selected semiconductor chip is elevated by the use of an X--Y--Z assembly by having a rounded tip portion of a round probe member assembly that is part of the X--Y--Z assembly contact a back portion of a flexible, transparent backing layer beneath the selected semiconductor chip so that removal of the semiconductor chip can be completed by using a vacuum type pencil.Type: GrantFiled: August 14, 1997Date of Patent: October 31, 2000Assignee: Microchip Technology IncorporatedInventor: Joseph D. Fernandez
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Patent number: 6125449Abstract: Method and apparatus of controlling a power state of a computer, the computer being connected to a monitor having a power control button. The computer is connected to the monitor over a video cable, and activation of the power control button is communicated to the computer over a wire in the video cable. In response to the activation signal, a system management interrupt is generated to invoke an SMI handler to change the power state of the computer. The power states of the computer include an ON state, an intermediate power state (such as Sleep state), and a suspend state (such as Soft-Off state).Type: GrantFiled: April 3, 1998Date of Patent: September 26, 2000Assignee: Compaq Computer CorporationInventors: Mark E. Taylor, Larry W. Kunkel, Gokalp Bayramoglu, Henry M. D'Souza, Valiuddin Ali
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Patent number: 6118400Abstract: A capacitor array for a Successive Approximation Register (SAR) based Analog to Digital (A/D) converter. The capacitor array is a capacitive ladder comprising a plurality of capacitive branches. Each capacitive branch is individually coupled to a separate bit of a driver circuit. Each of the plurality of capacitive branches drives an approximately same capacitive value while generating a binary weighted output voltage.Type: GrantFiled: January 20, 1998Date of Patent: September 12, 2000Assignee: Microchip Technology IncorporatedInventor: David Susak
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Patent number: 6108426Abstract: Power consumption of an audio system of a computer is controlled, in response to an audio power management event, by altering the operation of the audio system in a manner that changes the power consumption of the audio system.Type: GrantFiled: August 26, 1996Date of Patent: August 22, 2000Assignee: Compaq Computer CorporationInventor: James L. Stortz
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Patent number: 6106542Abstract: A surgical forceps adapted to grip tissue, blood vessels and walls of organs without causing injury thereto, and to further grasp suture needles without causing damage to the forceps. The surgical forceps is made of a light weight but strong material formed into two opposed branch arms joined at a proximate end and having springingly open opposing tips at a distal end. An alignment pin is attached to one of the branch arms and is located toward the distal end thereof. An alignment hole in the other branch arm is opposite the alignment pin and is comprised of a bushing made of a low friction material such as various types of plastics, NYLON.TM., TEFLON.TM. and the like. The alignment pin and bushing hole are located as close to the distal ends of the branch arms as physically practical. The alignment pin and bushing hole cooperate together in preventing the distal opposing tips from overlapping (misalignment).Type: GrantFiled: January 23, 1998Date of Patent: August 22, 2000Assignee: Microsurgical Laboratories, Inc.Inventors: Leonid Toybin, Irving J. Fishman, Victor Avigdor Grinshtein
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Patent number: 6091935Abstract: An improved integrated circuit transponder device is presented comprising, in combination, a single, externally wireless package enclosing an integrated circuit semiconductor chip, a coil within the package being selectively exposed to an electromagnetic field, and a detection portion on the integrated circuit semiconductor chip and being coupled to each end of the coil for detecting when voltages at each end of the coil are approximately equal over a period of time. The detection portion includes an exclusive NOR gate coupled to each end of the coil for determining when the coil voltages are equal, and the output of the exclusive NOR gate is input to a filter before being delivered to the remainder of the device circuitry.Type: GrantFiled: October 7, 1997Date of Patent: July 18, 2000Assignee: Microchip Technology IncorporatedInventors: Sam Alexander, Lee Furey
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Patent number: 6087241Abstract: A method is disclosed for forming narrow thermal silicon dioxide side isolation regions in a semiconductor substrate and MOS or CMOS semiconductor devices fabricated by this method. A thin stress relief layer is used in conjunction with a polysilicon buffering stress relief layer on the surface of a semiconductor substrate prior to the field oxidation process to restrict lateral silicon dioxide expansion thereby permitting the creation of narrow thermal silicon dioxide side isolation regions in the semiconductor substrate. A silicon dioxide layer is also used between an amorphous polysilicon (buffering stress relief) layer and a silicon nitride layer to function as an oxide cap, to avoid undesired pitting of the amorphous polysilicon layer, and to avoid interaction between the silicon nitride and amorphous polysilicon layers in areas of high stress.Type: GrantFiled: April 24, 1998Date of Patent: July 11, 2000Assignee: Microchip Technology IncorporatedInventors: Roger St. Amand, Robert Ma, Neil Deutscher
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Patent number: 6084935Abstract: A digital counter and method for counting are implemented which minimize fatigue-related failure in the storage element for the count value. The counting sequence is chosen such that the transitions within individual storage elements are the same for each element within a complete counting cycle. The invention extends to software or microcontroller implemented methods for counting, including encoding and decoding applications.Type: GrantFiled: August 13, 1998Date of Patent: July 4, 2000Assignee: Microchip Technology IncorporatedInventor: Robert P. Mather
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Patent number: 6078208Abstract: A precision temperature sensor produces a clock frequency which varies predictably over wide variations of ambient temperature. The invention has a oscillation generator, two independent current generators, a reference oscillator and a frequency counter. The outputs of the two independent current generators are combined to provide an approximately linear capacitor charging current which is directly proportional to changes in temperature. The capacitor charging current is used to drive the oscillation generator which outputs a clock frequency that is approximately linearly dependent on temperature with determinable slope and intercept. The frequency counter compares the output of the oscillation generator with the independent reference oscillator to compute a digital value for temperature. The precision temperature sensor is implemented on a single, monolithic integrated circuit.Type: GrantFiled: May 28, 1998Date of Patent: June 20, 2000Assignee: Microchip Technology IncorporatedInventors: James B. Nolan, Hartono Darmawaskita
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Patent number: 6078338Abstract: A computer system having a core logic chipset that interconnects a processor(s), a system memory and peripheral device agents. The core logic chipset has a programmable memory access arbiter that may be programmed to optimize accesses by the computer system processor(s) and agents to the system memory for best computer system performance. The memory access arbiter may be programmed specifically for each system agent. An access count register may be incorporated into the core logic chipset wherein each system agent may be represented by a portion of the access count register. The values programmed into the portions of the access count register determine how many memory accesses the associated agent may take before another agent is granted a memory access, and how many cachelines may be transferred during a memory access.Type: GrantFiled: March 11, 1998Date of Patent: June 20, 2000Assignee: Compaq Computer CorporationInventors: Ronald T. Horan, Phillip M. Jones, Gregory N. Santos, Robert Allan Lester, Gary J. Piccirillo
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Patent number: 6060974Abstract: A transformer is provided that consists of a primary winding, a secondary winding and a magnetic core. The primary winding is wound directly around the magnetic core, thereby removing the need for a bobbin. By removing the need for the bobbin, the transformer has a large window utilization factor, and associated low profile. As a result, the transformer has a high power to form factor ratio. A method for making the transformer includes the steps of joining two halves of the core before winding the primary winding. Because the half-cores are joined prior to the wrapping of the primary winding, the core provides bobbin functionality. In addition, a header plate is provided for coupling a plurality of leads of a transformer to sources on an integrated circuit board, where the transformer consists of a magnetic core, a primary winding and a secondary winding. The header plate engages the magnetic core, providing a termination path for the wire of the secondary winding.Type: GrantFiled: September 29, 1998Date of Patent: May 9, 2000Assignee: Compag Computer CorporationInventors: Bernhard Schroter, William Ng
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Patent number: 6057742Abstract: A low power oscillator having fast start-up times. The low power fast starting oscillator uses an oscillator circuit having an input and an output for generating a signal of a desired frequency. A start-up detect circuit is coupled to the output of the oscillator circuit for detecting when the oscillator circuit has reached steady state operation and for generating a start-up circuit output signal which adjusts the gain of the oscillator circuit when steady state operation has been reached by the oscillator circuit. A noise generator is coupled to the input of the oscillator circuit and to the start-up detect circuit for inputting a noise pulse into the oscillator circuit. The noise pulse is used for biasing the input of the oscillator circuit to approximately an optimal bias voltage level. The noise generator is further used for sending an enable start-up detect signal to the start-up detect circuit to activate the start-up detect circuit.Type: GrantFiled: June 1, 1998Date of Patent: May 2, 2000Assignee: Microchip Technology IncorporatedInventor: Louis A. Prado
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Patent number: 6057965Abstract: An improved system for scanning images is provided. The system includes a housing having a transparent support surface on which the document or other image being scanned is placed. The housing further contains an array of generally triangular-shaped prisms optically aligned. The array of prisms is coated with one of two types of electro-optical materials, one that makes the prisms reflective in the presence of an electromagnetic field and transparent in the absence of an electromagnetic field, and another that makes the prisms reflective in the absence of an electromagnetic field and transparent in the presence of an electromagnetic field. The electromagnetic field is created by applying a voltage across the coated prisms. A sequencer is used to activate individual electro-optical prisms so that the slices of the image can be reflected. By sequentially activating the electro-optical prisms, successive slices of the image can be presented to an image receptor disposed outside of the housing.Type: GrantFiled: October 6, 1999Date of Patent: May 2, 2000Assignee: Compaq Computer CorporationInventors: Michael F. Angelo, William Whiteman, Ramkrishna Prakash
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Patent number: 6047380Abstract: A semiconductor device for receiving analog input signals includes a microprocessor for processing signal information. The microprocessor is put in a sleep mode when not called upon to process signal information, and is either left in that mode or awakened depending on the level of a continuously variable analog input signal relative to a programmed threshold level. If the relative levels of the analog input signal and the programmed threshold level result in the microprocessor being awakened, information contained in the analog input signal is processed to initiate a selected action. In typical applications, the semiconductor device performs a control function, such as to control the operation of an external circuit in response to information from at least one continuously variable analog input signal derived from the external circuit. The microprocessor, when awakened, assists in controlling the external circuit to restore that analog input signal to a predetermined level distinct from the threshold level.Type: GrantFiled: December 8, 1997Date of Patent: April 4, 2000Assignee: Microchip Technology IncorporatedInventors: James Nolan, Brian Dellacroce
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Patent number: 6046662Abstract: A transformer is provided that consists of a primary winding, a secondary winding and a magnetic core. The primary winding is wound directly around the magnetic core, thereby removing the need for a bobbin. By removing the need for the bobbin, the transformer has a large window utilization factor, and associated low profile. As a result, the transformer has a high power to form factor ratio. A method for making the transformer includes the steps of joining two halves of the core before winding the primary winding. Because the half-cores are joined prior to the wrapping of the primary winding, the core provides bobbin functionality. In addition, a header plate is provided for coupling a plurality of leads of a transformer to sources on an integrated circuit board, where the transformer consists of a magnetic core, a primary winding and a secondary winding. The header plate engages the magnetic core, providing a termination path for the wire of the secondary winding.Type: GrantFiled: September 29, 1998Date of Patent: April 4, 2000Assignee: Compaq Computer CorporationInventors: Bernhard Schroter, William Ng
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Patent number: 6043746Abstract: A Radio Frequency Identification (RFID) security tag for attachment to a small article of merchandise to monitor the tagged item. The security tag uses a thin flexible strip. An RFID tag device is coupled to the thin flexible strip and is used for storing data related to the small article of merchandise to be monitored. A plurality of conductors are laid on the thin flexible strip. The plurality of conductors are coupled together to form a multiple turn coil for providing energy to the RFID tag device when a first end of the thin flexible strip is coupled to a second end of the thin flexible strip to form a loop.Type: GrantFiled: February 17, 1999Date of Patent: March 28, 2000Assignee: Microchip Technology IncorporatedInventor: Peter Sorrells
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Patent number: 6031510Abstract: Method and apparatus for controlling the updating of a random access memory (RAM) that stores data for coding the activation of segments of one or more alphanmeric characters of a liquid crystal display (LCD), to maintain substantially a direct current (DC) voltage value of zero across transparent conductive plates of the LCD, is performed or provided in a microcontroller having internal LCD control capabilities. A type B waveform is employed for activating the LCD, the waveform being of a type in which data is transmitted over two frames, the data in the second frame of which is the inverse of data in the first frame thereof to maintain an average DC voltage value over each two-frame portion of the waveform at substantially zero volt. The RAM is allowed to be written to for updating the data therein only after completion of an entire two-frame portion of the waveform and before commencement of a new two-frame portion, to avoid a non-zero average DC voltage across the LCD glass during a two-frame portion.Type: GrantFiled: June 28, 1996Date of Patent: February 29, 2000Assignee: Microchip Technology IncorporatedInventors: Rodney Drake, Scott Ellison
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Patent number: 6029241Abstract: A processor architecture scheme which allows for encoding multiple addressing modes and which has multiple sources for generating a bank address value. The processor architecture scheme has a Central Processing Unit (CPU) for executing an instruction set. A data memory is coupled to the CPU. The data memory is used for storing and transferring data to and from the CPU. The data memory is divided into a plurality of banks wherein one of the plurality of banks is a dedicated bank for general and special purpose registers. A selection circuit is coupled to the data memory. The selection circuit is used for selecting one of the multiple sources for generating the bank address value. A bank select register is coupled to the selection circuit. The bank select register is used for supplying a bank address value for an instruction to be executed in a direct short addressing mode.Type: GrantFiled: October 28, 1997Date of Patent: February 22, 2000Assignee: Microchip Technology IncorporatedInventors: Igor Wojewoda, Sumit Mitra, Rodney J. Drake
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Patent number: 6020792Abstract: A precision relaxation oscillator with temperature compensation produces a stable clock frequency over wide variations of ambient temperature. The invention has a oscillation generator and two independent current generators. The outputs of the two programmable, independent current generators are combined to provide a capacitor charging current which is independent of temperature. The precision relaxation oscillator with temperature compensation is implemented on a single, monolithic integrated circuit.Type: GrantFiled: March 19, 1998Date of Patent: February 1, 2000Assignee: Microchip Technology Inc.Inventors: James B. Nolan, Hartono Darmawaskita, R. Scott Ellison, David Susak