Patents Represented by Attorney David A. Cain
  • Patent number: 8302037
    Abstract: A differential system producing differential signals with offset cancellation utilizing a double differential input pair system is disclosed. It uses two parallel differential transistor pairs which are intentionally skewed. Nominally, the differential pairs are skewed in opposite direction from each, but with equal magnitude, so that the combination of the two differential pairs is nominally balanced. The current through each differential pair is then increased or decreased until any offset is sufficiently cancelled, using a selection means for providing an equi-potential value to first and second differential inputs in a calibration mode of the system and a comparison means for comparing first and second differential outputs in a calibration mode to determine the offset of the system.
    Type: Grant
    Filed: June 30, 2009
    Date of Patent: October 30, 2012
    Assignee: International Business Machines Corporation
    Inventors: Igor Arsovski, Anthony R Bonaccio, Hayden (Clay) Cranford, Jr., Joseph A Iadanza, Pradeep Thiagarajan, Sebastian T Ventrone, Benjamin T Voegeli
  • Patent number: 8120987
    Abstract: A random access memory circuit enabling a decodable sense amplifier array for power saving with column steering redundancy. A first decoder receives an input address and accesses at least one memory cell in the array and is capable of executing column steering redundancy. A master redundancy signal is triggered when column steering redundancy is requested. A plurality of sense amplifiers, wherein, each sense amplifier in the plurality of sense amplifiers is coupled to at least one memory cell in an array of memory cells. A second decoder receives the input address and selectively activates a first set of sense amplifiers of the plurality of sense amplifiers and selectively activates a second set of sense amplifiers in the plurality of amplifier only when the master redundancy signal is activated.
    Type: Grant
    Filed: January 5, 2010
    Date of Patent: February 21, 2012
    Assignee: International Business Machines Corporation
    Inventors: Howard Pilo, Vinod Ramadurai
  • Patent number: 8037395
    Abstract: A Partially-Overlapped Block (POB) code used in an encoding and decoding method in which a plurality of different block codes are combined so that the block codes partially overlap one another. A method for recovering a plurality of packets by using a loss correction capability of this encoding method in which a larger number of packets than the number of added redundant packets per frame are recovered, by reusing redundant information of neighboring frames effectively, without increasing the asymptotic complexity of its decoding algorithm.
    Type: Grant
    Filed: July 3, 2007
    Date of Patent: October 11, 2011
    Assignee: International Business Machines Corporation
    Inventors: Yasunao Katayama, Daiju Nakano
  • Patent number: 8027942
    Abstract: The method and circuits of the present invention aim to associate a complex component operator (CC_op) to each component of an input pattern presented to an input space mapping algorithm based artificial neural network (ANN) during the distance evaluation process. A complex operator consists in the description of a function and a set of parameters attached thereto. The function is a mathematical entity (either a logic operator e.g. match(Ai,Bi), abs(Ai?Bi), . . . or an arithmetic operator, e.g. >, <, . . . ) or a set of software instructions possibly with a condition. In a first embodiment, the ANN is provided with a global memory, common for all the neurons of the ANN, that stores all the CC_ops. In another embodiment, the set of CC_ops is stored in the prototype memory of the neuron, so that the global memory is no longer physically necessary. According to the present invention, a component of a stored prototype may now designate objects of different nature.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: September 27, 2011
    Assignee: International Business Machines Corporation
    Inventors: Ghislain Imbert de Tremiolles, Pascal Tannhof
  • Patent number: 7928812
    Abstract: Circuits and methods for automated real-time tuning of wide range frequency/delay voltage controlled oscillators (VCO) using a reset mechanism, to account for run-time variations such as power supply, temperature, reference clock frequency and input slew drift etc is described. It finds extensive applications in wide range, multi frequency band phase and delay locked loops. In one embodiment, an automated Jump-Down band switching structure and method for use in VCOs with a plurality of frequency bands is described. This involves monitoring the VCO's analog control voltage signal until it reaches a predetermined lower limit, at which time band switching to an overlapping lower frequency band is triggered by an internally generated reset signal, while simultaneously charging the analog control voltage to a limit in a pre-determined range of the lower band, to avoid phase detector malfunctions in the PLL/DLL system at lower control voltages during band switch.
    Type: Grant
    Filed: June 4, 2009
    Date of Patent: April 19, 2011
    Assignee: International Business Machines Corporation
    Inventors: Anjali R Malladi, Pradeep Thiagarajan
  • Patent number: 7895028
    Abstract: A design structure which enables e-fuse memory repair. The design structure uses a compressed bit string to generate another bit string based on a select value. The select value provides instructions to an encoding logic element, which generates a second bit string. For example, the select value may instruct the encoding logic to create a duplicate copy of each bit in the compressed bit string to generate a 2n-bit string. Once the fuses are programmed using the second bit string, the fuse values are read out as a third string, which is decoded by a decoding logic element according to the select value, thereby improving memory repair.
    Type: Grant
    Filed: July 10, 2007
    Date of Patent: February 22, 2011
    Assignee: International Business Machines Corporation
    Inventors: Darren Lane Anand, Michael Richard Ouellette, Michael Anthony Ziegerhofer
  • Patent number: 7816747
    Abstract: A detector for detecting electromagnetic waves, the detector having an antenna for receiving the electromagnetic waves, a semiconductor element, wherein a termination section of the semiconductor element establishes a termination resistor of the antenna, wherein the termination section is provided for heating a temperature-sensitive part of the semiconductor element, wherein the semiconductor element comprises a temperature-dependent characteristic that is dependent from the temperature of the temperature sensitive part and a measurement unit for measuring the temperature-dependent characteristic of the semiconductor element.
    Type: Grant
    Filed: July 6, 2007
    Date of Patent: October 19, 2010
    Assignee: International Business Machines Corporation
    Inventors: Thomas E. Morf, Martin Leo Schmatz, Jonas R. Weiss
  • Patent number: 7724565
    Abstract: A design structure embodied in a machine readable medium used in a design process for small signal sensing during a read operation of a static random access memory (SRAM) cell includes coupling a pair of complementary sense amplifier data lines to a corresponding pair of complementary bit lines associated with the SRAM cell, and setting a sense amplifier so as to amplify a signal developed on the sense amplifier data lines, wherein the bit line pair remains coupled to the sense amplifier data lines at the time the sense amplifier is set.
    Type: Grant
    Filed: September 6, 2007
    Date of Patent: May 25, 2010
    Assignee: International Business Machines Corporation
    Inventors: John E. Barth, Jr., Geordie M. Braceras, Harold Pilo