With Field-effect Transistor Patents (Class 326/55)
  • Patent number: 11929120
    Abstract: A memory cell comprises a floating gate being disposed between a control gate and a channel, the floating gate being electrically isolated from the control gate and the channel by charge barriers and being configured to enable the selective passage of charge carriers into and out of the floating gate to provide occupancy states of the floating gate. The channel is arranged to provide a minimum threshold voltage to be applied between a control gate and the substrate for introducing charge carriers into the channel from the substrate to make the channel conductive, the minimum threshold voltage being dependent on the occupancy state of the floating gate, such that a read voltage may be applied between the control gate and the substrate that will provide a conductive channel for a first occupancy state of the floating gate and a non-conductive channel for a second occupancy state of the floating gate.
    Type: Grant
    Filed: May 28, 2020
    Date of Patent: March 12, 2024
    Assignee: University of Lancaster
    Inventors: Manus Hayne, Dominic Lane
  • Patent number: 11152942
    Abstract: A CMOS transistor circuit including: a first block generating a first output signal of a NOR state, in response to first and second input signals; a second block including a first AND-OR gate, the second block generating a second output signal of an OR or an AND state, the second block receiving the first and second input signals and the first output signal; a third block generating a third output signal of the NOR state, in response to a third input signal and the second output signal; a fourth block including a second AND-OR gate, the fourth block generating a fourth output signal of the OR or the AND state in response to the third input signal, the second output signal and the third output signal; and a fifth block including an inverter gate, the fifth block generating a fifth output signal in response to the fourth output signal.
    Type: Grant
    Filed: March 3, 2020
    Date of Patent: October 19, 2021
    Assignee: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hareharan Nagarajan, Abhishek Ghosh, Sajal Mittal
  • Patent number: 10651829
    Abstract: A signal receiver circuit includes: a negative voltage applier suitable for applying a negative voltage to a common source node in response to a first clock is at a first logic level; a first sampling transistor coupled between the common source node and a first sampling node to sink a current from the first sampling node to the common source node in response to a first input signal; a second sampling transistor coupled between the common source node and a second sampling node to sink a current from the second sampling node to the common source node in response to a second input signal; an equalizer suitable for equalizing the first sampling node and the second sampling node in response to the first clock is at a second logic level; a precharger suitable for precharging a first output node and a second output node with a pull-up voltage in response to a second clock is at the first logic level, and electrically coupling the first output node and second output node to the second sampling node and the first sam
    Type: Grant
    Filed: December 28, 2018
    Date of Patent: May 12, 2020
    Assignee: SK hynix Inc.
    Inventor: Min-Chang Kim
  • Publication number: 20150054548
    Abstract: A manufacturing method of a semiconductor device in which the threshold is adjusted is provided. In a semiconductor device including a plurality of transistors arranged in a matrix each including a semiconductor, a source or drain electrode electrically connected to the semiconductor, a gate electrode, and a charge trap layer between the gate electrode and the semiconductor, electrons are trapped in the charge trap layer by performing heat treatment and, simultaneously, keeping a potential of the gate electrode higher than that of the source or drain electrode for 1 second or more. By this process, the threshold increases and Icut decreases. A circuit that supplies a signal to the gate electrode (e.g., word line driver) is provided with a selection circuit formed of an OR gate, an XOR gate, or the like, whereby potentials of word lines can be simultaneously set higher than potentials of bit lines.
    Type: Application
    Filed: August 21, 2014
    Publication date: February 26, 2015
    Inventors: Kiyoshi KATO, Yasuhiko TAKEMURA, Tetsuhiro TANAKA, Takayuki INOUE, Toshihiko TAKEUCHI, Yasumasa YAMANE, Shunpei YAMAZAKI
  • Patent number: 8872545
    Abstract: An exclusive OR circuit includes, inter alia: a low pass unit configured to apply a second data to an output node when a first data is at a low level and to apply the first data to the output node when the second data is at a low level, and a discharge unit configured to discharge a voltage level of the output node when the first and second data are at a high level.
    Type: Grant
    Filed: September 5, 2012
    Date of Patent: October 28, 2014
    Assignee: SK Hynix Inc.
    Inventor: Joong Ho Lee
  • Patent number: 8786348
    Abstract: A control circuit of a light-emitting element comprises a rectifying unit which full-wave rectifies an alternating current power supply, a clock generator which generates and outputs a clock signal (CLK), a first comparator which compares a comparison voltage (CS) corresponding to a current flowing to the light-emitting element and a reference voltage (REF), and a switching element which is set to an ON state in synchronization with the clock signal (CLK) and which is set to an OFF state when the comparison voltage (CS) becomes greater than the reference voltage (REF) at the first comparator, to switch the current flowing to the light-emitting element. In this structure, a period of the clock signal (CLK) generated in the clock generator is varied, to reduce or inhibit noise.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: July 22, 2014
    Assignee: Semiconductor Components Industries, LLC
    Inventors: Shuhei Kawai, Yoshio Fujimura
  • Patent number: 8773165
    Abstract: Disclosed herein is a logic circuit that includes a transistor T1 coupled between VPERI and a node n1, a transistor T2 coupled between VPERI and a node n2, a transistor T3 coupled between VSS and a node n3, a transistor T4 coupled between VSS and a node n4, transistors T5 and T7 coupled in series between the nodes n1 and n3, transistors T9 and T11 coupled in series between the nodes n1 and n3, transistors T6 and T8 coupled in series between the nodes n2 and n4, and transistors T10 and T12 coupled in series between the nodes n2 and n4. An output signal Y is output from a connection point of the transistors T5 and T7 and a connection point of the transistors T6 and T8.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: July 8, 2014
    Inventors: Yuki Nakamura, Chiaki Dono, Ronny Schneider
  • Publication number: 20140043060
    Abstract: A logic gate with three inputs A, B, and C, and one output implementing a function MAJ(A,B,C)=A*B+B*C+A*C comprising two mutually exclusive transmission gates (TGs) connected in series, based on two parallel double-gate controllable polarity devices, a polarity of each being controlled by input A and a conduction being controlled by input B, or vice-versa, in opposite polarities, and that route either an input A or C from one side of the transmission gates to the output.
    Type: Application
    Filed: August 7, 2013
    Publication date: February 13, 2014
    Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL)
    Inventors: Luca Gaetano AMARU, Pierre-Emmanuel Julien Marc GAILLARDON, Giovanni DE MICHELI
  • Publication number: 20130265082
    Abstract: An exclusive OR circuit includes, inter alia: a low pass unit configured to apply a second data to an output node when a first data is at a low level and to apply the first data to the output node when the second data is at a low level, and a discharge unit configured to discharge a voltage level of the output node when the first and second data are at a high level.
    Type: Application
    Filed: September 5, 2012
    Publication date: October 10, 2013
    Applicant: SK HYNIX INC.
    Inventor: Joong Ho LEE
  • Publication number: 20130162293
    Abstract: A method is disclosed for creating a logic integrated circuit cell from an original logic integrated circuit gate. The method includes combining the original logic integrated circuit cell with a second circuit which takes as input a complement of inputs of the original logic integrated circuit cell and provides as output complements of the output of the original logic integrated circuit cell.
    Type: Application
    Filed: December 3, 2012
    Publication date: June 27, 2013
    Applicant: ROBUST CHIP INC.
    Inventor: ROBUST CHIP INC.
  • Publication number: 20130082735
    Abstract: Disclosed herein is a logic circuit that includes a transistor T1 coupled between VPERI and a node n1, a transistor T2 coupled between VPERI and a node n2, a transistor T3 coupled between VSS and a node n3, a transistor T4 coupled between VSS and a node n4, transistors T5 and T7 coupled in series between the nodes n1 and n3, transistors T9 and T11 coupled in series between the nodes n1 and n3, transistors T6 and T8 coupled in series between the nodes n2 and n4, and transistors T10 and T12 coupled in series between the nodes n2 and n4. An output signal Y is output from a connection point of the transistors T5 and T7 and a connection point of the transistors T6 and T8.
    Type: Application
    Filed: September 28, 2012
    Publication date: April 4, 2013
    Applicant: Elpida Memory, Inc.
    Inventor: Elpida Memory, Inc.
  • Patent number: 8405421
    Abstract: A nonvolatile full adder circuit comprising a full adder electrical circuitry comprising three input terminals for receiving two input and carry-in signals, a sum output terminal, and an carry-out output terminal; first and second nonvolatile memory elements electrically coupled to the first and second output terminal, respectively at their first ends and to an intermediate voltage source at their second ends. The nonvolatile memory elements comprise two stable logic states. A logic state each of the of the nonvolatile memory elements is controlled by a bidirectional electrical current running between its first and second ends. The full adder circuitry is electrically coupled to a high voltage source at its first source terminal and to a low voltage source at its second source terminal, wherein an electrical potential of the intermediate voltage source is lower than that of the high voltage source but higher than that of the low voltage source.
    Type: Grant
    Filed: May 30, 2012
    Date of Patent: March 26, 2013
    Inventors: Alexander Mikhailovich Shukh, Tom A. Agan
  • Patent number: 8324932
    Abstract: A static complementary transistor type logic gate circuit includes a plurality of input terminals for receiving a corresponding plurality of input signals, and an output terminal. The logic gate circuit further includes a first plurality of transistors of one conductivity type, arranged to form a plurality of pullup paths for selectively connecting the output terminal, through one or more intermediate nodes, to a positive supply voltage based on the plurality of input signals; and a second plurality of transistors of the complementary conductivity type, arranged to form a plurality of pulldown paths for selectively connecting the output terminal, through one or more intermediate nodes, to a negative supply voltage based on the plurality of input signals. A precharge device is configured to selectively charge an intermediate node to the far-side supply voltage when the intermediate node is disconnected from the near-side supply voltage and disconnected from the output terminal.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: December 4, 2012
    Assignee: Oracle International Corporation
    Inventors: Jin-Uk Shin, Lancelot Y. Kwong, Gaurav Shrivastav
  • Publication number: 20120286891
    Abstract: Embodiments provide a mixer cell, which is implemented to logically combine a data signal with an oscillator signal and a sign signal to obtain a mixer cell output signal based on the logical combination. Further embodiments provide a modulator with a plurality of mixer cells.
    Type: Application
    Filed: May 4, 2012
    Publication date: November 15, 2012
    Applicant: Intel Mobile Communications GmbH
    Inventors: Markus Schimper, Martin Simon
  • Patent number: 8253546
    Abstract: A magnitude comparator for comparing magnitude of a first data and a second data is disclosed. The first data and the second data are both binary data. The magnitude comparator includes many non-least comparator cells and a P-channel transistor. Each of the non-least comparator cells includes a first transistor, a second transistor, a third transistor and a fourth transistor. The drain of the second transistor is electrically connected to the source of the first transistor, and the source of the second transistor is electrically connected to a ground terminal. The third transistor electrically connects the first transistor, and the fourth transistor electrically connects the first transistor and the third transistor. The source of the P-channel transistor electrically connects a supply terminal, the gate of the P-channel transistor electrically connects the ground terminal, and the drain of the P-channel transistor electrically connects the third transistor of the first comparator cell.
    Type: Grant
    Filed: November 25, 2010
    Date of Patent: August 28, 2012
    Assignee: National Changhua University of Education
    Inventor: Tsung-Chu Huang
  • Publication number: 20120126852
    Abstract: A static complementary transistor type logic gate circuit includes a plurality of input terminals for receiving a corresponding plurality of input signals, and an output terminal. The logic gate circuit further includes a first plurality of transistors of one conductivity type, arranged to form a plurality of pullup paths for selectively connecting the output terminal, through one or more intermediate nodes, to a positive supply voltage based on the plurality of input signals; and a second plurality of transistors of the complementary conductivity type, arranged to form a plurality of pulldown paths for selectively connecting the output terminal, through one or more intermediate nodes, to a negative supply voltage based on the plurality of input signals. A precharge device is configured to selectively charge an intermediate node to the far-side supply voltage when the intermediate node is disconnected from the near-side supply voltage and disconnected from the output terminal.
    Type: Application
    Filed: November 23, 2010
    Publication date: May 24, 2012
    Applicant: ORACLE INTERNATIONAL CORPORATION
    Inventors: Jin-Uk Shin, Lancelot Y. Kwong, Gaurav Shrivastav
  • Patent number: 7944244
    Abstract: Provided is a logic gate device capable of performing multiple logic operations by using a single logic gate circuit. The multi-functional logic gate device includes a pull-up switching unit having input switches of a first group being respectively connected to multiple input terminals and selection switches of the first group connected to either a selection terminal or a logically inverted selection terminal, the pull-up switching unit electrically connecting the input switches of the first group in series or in parallel between a power source and an output terminal according to logic levels of the selection terminal and the inverted selection terminal.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: May 17, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-soon Lim, Chan-kyung Kim
  • Patent number: 7843219
    Abstract: An XOR logic circuit includes a first transfer unit configured to transfer a logic high level data to an output terminal in response to data applied to first and second input terminals; a multiplexing unit configured to output a power voltage or a ground voltage in response to the data applied to the first and second input terminals; and a second transfer unit configured to transfer a logic low level data to the output terminal in response to an output signal of the multiplexing unit and the data applied to the first and second input terminals.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: November 30, 2010
    Assignee: Hynix Semiconductor, Inc.
    Inventor: Jin-Yeong Moon
  • Publication number: 20100277202
    Abstract: An exclusive-or circuit includes a pass gate controlled by a second input node. The pass gate is connected to pass through a version of a logic state present at a first input node to an output node when so controlled. A transmission gate is controlled by the first input node. The transmission gate is connected to pass through a version of the logic state present at the second input node to the output node when so controlled. Pullup logic is controlled by both the first and second input nodes. The pullup logic is connected to drive the output node low when both the first and second input nodes are high. An exclusive-nor circuit is defined similar to the exclusive-or circuit, except that the pullup logic is replaced by pulldown logic which is connected to drive the output node high when both the first and second input nodes are high.
    Type: Application
    Filed: May 5, 2009
    Publication date: November 4, 2010
    Applicant: Tela Innovations, Inc.
    Inventor: Scott T. Becker
  • Patent number: 7755390
    Abstract: An XOR logic circuit includes a first transfer unit configured to transfer a logic high level data to an output terminal in response to data applied to first and second input terminals; a multiplexing unit configured to output a power voltage or a ground voltage in response to the data applied to the first and second input terminals; and a second transfer unit configured to transfer a logic low level data to the output terminal in response to an output signal of the multiplexing unit and the data applied to the first and second input terminals.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: July 13, 2010
    Assignee: Hynix Semiconductor, Inc.
    Inventor: Jin-Yeong Moon
  • Patent number: 7750677
    Abstract: A novel methodology for the construction and operation of logical circuits and gates that make use of and contact to a fourth terminal (substrates/bodies) of MOSFET devices is described in detail. The novel construction and operation provides for maintaining such body-contacted MOSFET devices at a lower threshold voltage (VTh) when actively on (to increase overdrive and performance), and at a higher relative threshold voltage when off (to reduce leakage power). Because the threshold potential of a gate moves inversely to its body potential, it follows then that in general, the body of a given device must be tied to the inverse of the device's drain voltage to achieve such a desirable threshold potential modulation effect for improved device, circuit, gate and logical family operation.
    Type: Grant
    Filed: August 10, 2009
    Date of Patent: July 6, 2010
    Assignee: International Business Machines Corporation
    Inventors: Kerry Bernstein, Andres Bryant, Wilfried Haensch
  • Publication number: 20100141299
    Abstract: An XOR logic circuit includes a first transfer unit configured to transfer a logic high level data to an output terminal in response to data applied to first and second input terminals; a multiplexing unit configured to output a power voltage or a ground voltage in response to the data applied to the first and second input terminals; and a second transfer unit configured to transfer a logic low level data to the output terminal in response to an output signal of the multiplexing unit and the data applied to the first and second input terminals.
    Type: Application
    Filed: December 30, 2008
    Publication date: June 10, 2010
    Inventor: Jin-Yeong MOON
  • Patent number: 7560955
    Abstract: Disclosed is a logic circuit including first and second input terminals, supplied with respective logic signals, and first and second MOS transistors, having sources respectively connected to associated ones of the first and second input terminals and gates cross-connected to the second and first input terminals. The drains of the first and second MOS transistors are connected in common. The logic circuit also includes a MOS transistor, connected between a first power supply and a common node of the drains of the first and second MOS transistors and having a gate supplied with a reset signal so that the MOS transistor is turned on at the time of resetting. The logic circuit further includes an inverter having an input end connected to the common node.
    Type: Grant
    Filed: November 23, 2005
    Date of Patent: July 14, 2009
    Assignee: NEC Electronics Corporation
    Inventors: Hiroyuki Takahashi, Susumu Takano
  • Patent number: 7557614
    Abstract: A method for configuring a n-way XOR/XNOR circuit comprises providing a plurality of top stacks of PFETs each including at least three PFETs electrically connected between a high logic level and an output logic connection, providing a plurality of bottom stacks of NFETs each including at least three NFETs electrically connected between a low logic level and the output logic connection, connecting a source or a drain of the outermost PFET in each top stack to a source or a drain of a corresponding NFET in each bottom stack to generate inverted logic signals, inputting at least three input logic states to the stacks of PFETs to selectively connect or disconnect the output logic connection to the high logic level, inputting at least three input logic states to the stacks of NFETs to selectively connect or disconnect the output logic connection to the low logic level, and outputting a logic signal from the output logic connection.
    Type: Grant
    Filed: July 15, 2008
    Date of Patent: July 7, 2009
    Assignee: International Business Machines Corporation
    Inventors: Stefan Bonsels, Martin Padeffke, Tobias Werner, Alexander Woerner
  • Patent number: 7358769
    Abstract: An XOR circuit designed in dual rail includes four shunt transistors, wherein the shunt transistors are disposed to couple an input potential at a first input or a second input with an output.
    Type: Grant
    Filed: February 23, 2006
    Date of Patent: April 15, 2008
    Assignee: Infineon Technologies AG
    Inventors: Tanja Roemer, Norbert Janssen
  • Patent number: 7312634
    Abstract: An exclusive-OR circuit may include a NAND gate configured to receive a plurality of input signals and a NOR gate configured to receive the plurality of input signals. The exclusive-OR circuit may also include a switch configured to couple an output signal of the NAND gate to an output node when an output signal of the NOR gate is “LOW”, and a pull-down circuit configured to pull down the output node when the output signal of the NOR gate is “HIGH”. An exclusive-NOR circuit may include a NAND gate configured to receive a plurality of input signals and a NOR gate configured to receive the plurality of input signals. The exclusive-NOR circuit may also include a switch configured to couple an output signal of the NOR gate to an output node when an output signal of the NAND gate is “HIGH”, and a pull-up circuit configured to pull up the output node when the output signal of the NAND gate is “LOW”.
    Type: Grant
    Filed: February 14, 2006
    Date of Patent: December 25, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Young-chul Rhee
  • Patent number: 7298171
    Abstract: A layout area efficient, high speed, dynamic multi-input exclusive OR (XOR) and exclusive NOR (XNOR) logic gate circuit design of especial utility with respect to integrated circuit devices. The logic gate design disclosed herein utilizes fewer transistors than traditional static designs and, therefore, requires a smaller amount of integrated circuit layout area while nevertheless affording higher speed operating performance than that exhibited in existing conventional circuits.
    Type: Grant
    Filed: July 8, 2005
    Date of Patent: November 20, 2007
    Assignees: United Memories, Inc., Sony Corporation
    Inventor: Michael C. Parris
  • Patent number: 7279936
    Abstract: A logic basic cell, a logic basic cell arrangement, and a logic device. A logic basic cell is provided for forming a logic combination of two data signals in accordance with a logic function that can be selected by means of a plurality of logic selection elements, having four data signal inputs, to which two data signals and the logically complementary data signals thereof can be applied, and having six logic selection elements between the data signal inputs. At a data signal output, the logic combination of the two data signals in accordance with the logic function selected by means of the logic selection elements can be provided as output signal.
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: October 9, 2007
    Assignee: Infineon Technologies AG
    Inventors: Jörg Gliese, Tim Schönauer
  • Patent number: 7271703
    Abstract: A 2-bit binary comparator, including: a comparison unit for receiving a first bit and a second bit to thereby compare the first bit with the second bit; and an enable unit for outputting a comparison result of the comparison unit as an output of the 2-bit binary comparator according to an enable signal.
    Type: Grant
    Filed: March 2, 2005
    Date of Patent: September 18, 2007
    Assignee: Magnachip Semiconductor, Ltd.
    Inventor: Yong-Sup Lee
  • Patent number: 7242219
    Abstract: A circuit for a parity tree is disclosed. In one embodiment, a circuit for a parity tree includes a pull-up circuit, a pull-down circuit, and a cross-couple circuit. The circuit, an XOR/XNOR circuit, includes both an output node and an inverted output node. For a given set of input signals, a pull-up path exists through the cross-couple circuit for one of the output node and the inverted output node, and wherein a pull-down path exists through the cross-couple circuit for the other one of the output node and the inverted output node.
    Type: Grant
    Filed: September 8, 2005
    Date of Patent: July 10, 2007
    Assignee: Advanced Micro Devices, Inc.
    Inventors: Eric W. Mahurin, Dimitry Patent
  • Patent number: 7218153
    Abstract: A circuit system having a first inverter, a second inverter and a blockage module is disclosed. The first inverter is coupled between a supply voltage and a complementary input signal, for generating a first output signal on an output terminal thereof in response to an input signal received by an input terminal of the same. The blockage module is coupled to the output terminal of the first inverter for selectively passing the first output signal there across in response to the input signal and the complementary input signal. The second inverter is coupled between the supply voltage and a complementary supply voltage, having a first input terminal directly coupled to the output terminal of the first inverter and a second input terminal coupled to the same via the blockage module for generating a second output signal in response to the first output signal.
    Type: Grant
    Filed: August 22, 2005
    Date of Patent: May 15, 2007
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventor: Yen-Huei Chen
  • Patent number: 7215142
    Abstract: An inverse toggle circuit includes a pair of input connections for receiving each of four possible input signal combinations in a sequential rotational manner. Each of four data paths are defined to be exercised in accordance with a respective input signal combination. A first output connection is controlled by first and third data paths. A second output connection is controlled by second and fourth data paths. Each data path is defined such that a currently exercised data path generates an output signal having an asserted state on the output connection that is controlled by the currently exercised data path. The currently exercised data path is also defined to cause a next data path in the sequence to generate an output signal having a non-asserted state on the output connection that is controlled by the next data path.
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: May 8, 2007
    Assignee: Sun Microsystems, Inc.
    Inventor: Scott Fairbanks
  • Patent number: 7142014
    Abstract: An apparatus and method of the present invention includes a high frequency exclusive OR (XOR) with a peaked load stage. The peaked load stage coupled to the XOR produces a peaked response at a specified frequency of operation. The high frequency XOR comprises a mixer stage comprising first and second transconductance stages coupled to produce a differential output current. The peaked load stage receives the differential output current from the mixer stage and provides increasing impedance at a specified frequency of operation. The peaked load stage includes a pair of peaked load blocks comprising a saturation region peaked load MOSFET and a resistive load. The gate-to-source capacitance of the peaked load MOSFET is coupled to the resistive load to form a high pass filter that provides additional bias to a gate of the peaked load MOSFET that increases the resistance of the peaked load MOSFET at the specified frequency.
    Type: Grant
    Filed: November 16, 2004
    Date of Patent: November 28, 2006
    Assignee: Xilinx, Inc.
    Inventors: Eric D. Groen, Charles W. Boecker, William C. Black
  • Patent number: 7088138
    Abstract: A CML XOR logic circuit is provided that includes a pair of pull-up transistors, a pair of current source transistors and a logic switch network coupled between the pull-up transistors and the current source transistors. The logic switch network including a plurality of transistors divided into a first branch, a second branch and a third branch. A tail current flows through the first branch, the second branch or the third branch based on at least two input signals to the plurality of transistors.
    Type: Grant
    Filed: August 31, 2004
    Date of Patent: August 8, 2006
    Assignee: Intel Corporation
    Inventors: Jianping Xu, Fabrice Paillet, Tanay Karnik
  • Patent number: 7030658
    Abstract: Systems and methods for reducing the power consumption of some combinations of logic gates by reducing the number of unnecessary transitions that are made by logic gates that do not affect the output of the logic. In one embodiment, a modified exclusive-OR (XOR) gate is coupled to a modified multiplexer. The XOR gate has two inputs, Ain and Bin, and an output, XORout, which is provided as an input to the multiplexer. Another input to the multiplexer is Cin. A select signal is input to the multiplexer to select either Cin or XORout to be provided at the output of the multiplexer. If XORout is selected, the XOR gate operates in a first mode in which it functions as a normal XOR gate. If Cin is selected, the XOR gate operates in a second mode in which the XOR gate uses less power than when the XOR gate operates normally.
    Type: Grant
    Filed: January 23, 2004
    Date of Patent: April 18, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiroaki Murakami, Osamu Takahashi, Jieming Qi
  • Patent number: 6930512
    Abstract: Aspects of the invention provide a fast one level zero-current-state XOR gate. An embodiment of the invention provides a first pair of differentially configured transistors and a level shifting resistor coupled to the first pair of differentially configured transistors. The one level zero-current-state XOR gate may also include a second pair of differentially configured transistors. A core of the XOR gate may be coupled to outputs of the first and the second pairs of differentially configured transistors.
    Type: Grant
    Filed: June 6, 2003
    Date of Patent: August 16, 2005
    Assignee: Broadcom Corporation
    Inventor: Guangming Yin
  • Patent number: 6803793
    Abstract: A circuit arrangement uses differential pass transistor logic, a low voltage swing and charge recycling to save power, in which the swing voltage is reduced, but the supply voltage is not reduced, thereby maintaining the transistor device current and avoiding speed degradation. SOI devices including an adder, which uses this circuit arrangement, can avoid the body effect to long pass transistor network and improve the speed at lower supply voltage.
    Type: Grant
    Filed: February 1, 2002
    Date of Patent: October 12, 2004
    Assignee: Fujitsu Limited
    Inventor: Atsuki Inoue
  • Patent number: 6781412
    Abstract: Each binary carry logic circuit 20 of half adder circuits other than that for the least significant digit comprises a transfer gate 212 turned on when an input bit A2 is active and receiving a carry-in bit *C2 at its data input, and a transistor 23, turned on when the input bit A2 is inactive, connected between a power supply potential VDD and the data output of the transfer gate 212 a signal on which is a carry-out bit *C3. Transfer gates 212 to 214 of binary carry logic circuits other than that for the least significant digit are connected in chain, and are simultaneously on/off controlled by input bits A2 to A4, letting the carry-in bit *C2 from the least significant digit propagate through the transfer gate chain at a high speed.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: August 24, 2004
    Assignee: Fujitsu Limited
    Inventors: Shuji Yoshida, Daisuke Miura, Toshio Arakawa, Mitsuaki Nagasaka, Kenji Yoshida, Hiroyuki Honda, Kenji Kobayashi, Masayuki Okamoto
  • Patent number: 6765410
    Abstract: An exclusive OR (XOR) circuit is provided to perform a logical XOR function on multiple bits that eliminates the XOR function hazard. The XOR circuit performs a logical XOR function on data values that have been encoded to prevent the XOR function hazard from occurring.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: July 20, 2004
    Assignee: Sun Microsystems, Inc.
    Inventor: Thomas L. Meneghini
  • Patent number: 6727728
    Abstract: An XOR circuit includes XOR function logic. One advantage of the XOR circuit is that the complements of A and B are not required. The XOR circuit receives an enable signal that disables all the load transistors to eliminate static power dissipation of the XOR circuit and always force the output high when disabled. The output signal of the XOR function logic does not swing rail-to-rail and also has a relatively low drive level. To overcome that, cascade transistor stages are used that have small increments in device sizes, preferably widths, between stages. This allows the fastest rise/fall times at the output of the XOR function logic.
    Type: Grant
    Filed: December 30, 1997
    Date of Patent: April 27, 2004
    Assignee: LSI Logic Corporation
    Inventor: Ricky F. Bitting
  • Patent number: 6724221
    Abstract: In one form of the invention, circuitry having exclusive-OR and latch functionality includes timing circuitry and logic circuitry. The circuitry includes a memory, with first and second memory nodes, for storing a state and its complement, and first and second timing circuitry portions, each operable to receive at least one timing signal, coupled to the respective memory nodes. The logic circuitry includes first and second logic circuitry portions, each of which is operable to receive at least first and second data signals. Each of the logic circuitry portions is coupled in series with a conditionally conductive path of one of the respective first and second timing circuitry portions.
    Type: Grant
    Filed: March 28, 2002
    Date of Patent: April 20, 2004
    Assignee: International Business Machines Corporation
    Inventors: Juan-Antonio Carballo, David William Boerstler, Jeffrey L. Burns, Kevin John Nowka, Li Shi
  • Patent number: 6700405
    Abstract: A logic circuit capable of suppressing occurrence of wraparound of signals, capable of reducing power consumption, and in addition achieving a reduction of a circuit scale and an improvement of an operating speed and a full adder using the same, wherein provision is made of an exclusive-OR generation circuit 12 for receiving a first logic signal A and a second logic signal B taking a logic “1” or “0” and generating the exclusive-OR of the first logic signal A and the second logic signal B, a dual signal generation circuit 11 for receiving the first logic signal A and the second logic signal B and generating the dual signal of the exclusive-OR of the first logic signal A and the second logic signal B, and an interpolation circuit 13 for compulsorily setting the output level of the dual signal at the level of the logic “1” when the output level of the exclusive-OR is the logic “0”, while compulsorily setting the output level of the exclusive-OR at the level of the
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: March 2, 2004
    Assignee: Sony Corporation
    Inventor: Kouji Hirairi
  • Patent number: 6686776
    Abstract: A coincidence determining circuit determines whether first and second digital data each consisting of a plurality of bits coincide with one another. The coincidence determining circuit includes a wiring and a plurality of bit comparison circuits corresponding in number to the bits. Each bit comparison circuit includes first and second transistors connected in series between the wiring and a power supply line and third and fourth transistors connected in series between the wiring and the power supply line. The first and second transistors receive a first logical signal of an associated bit of the first digital data and an inverted signal of a second logical signal of an associated bit of the second digital data. The third and fourth transistors receive an inverted signal of the first logical signal and the second logical signal. The four transistors of each bit comparison circuit suppress an increase in circuit area.
    Type: Grant
    Filed: February 6, 2002
    Date of Patent: February 3, 2004
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Kohji Sakata, Hirofumi Saitoh
  • Patent number: 6680625
    Abstract: High speed CML logic gate systems for providing selected Boolean logic functions. Two halves of a substantially symmetric first system, having a relatively small number (14) of CMOS transistors, are used to generate any of the logic functions AND, NAND, OR and NOR. Two halves of a substantially symmetric second system having another small number (10) of transistors are used to generate any of the logic functions XOR, XNOR and NOT. In either system, the sum of currents passing through certain voltage-controlling gates is substantially constant.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: January 20, 2004
    Assignee: Lattice Semiconductor Corp.
    Inventors: Kochung Lee, Ming Qu, Xueping Jiang, Xiang Zhu
  • Publication number: 20030184340
    Abstract: In one form of the invention, circuitry having exclusive-OR and latch functionality includes timing circuitry and logic circuitry. The circuitry includes a memory, with first and second memory nodes, for storing a state and its complement, and first and second timing circuitry portions, each operable to receive at least one timing signal, coupled to the respective memory nodes. The logic circuitry includes first and second logic circuitry portions, each of which is operable to receive at least first and second data signals. Each of the logic circuitry portions is coupled in series with a conditionally conductive path of one of the respective first and second timing circuitry portions.
    Type: Application
    Filed: March 28, 2002
    Publication date: October 2, 2003
    Applicant: International Business Machines Corporation
    Inventors: Juan-Antonio Carballo, David William Boerstler, Jeffrey L. Burns, Kevin John Nowka, Li Shi
  • Patent number: 6549037
    Abstract: Briefly, in accordance with one embodiment of the invention, an integrated circuit comprises a first stage that provides differential outputs in one mode and substantially equal outputs in another mode.
    Type: Grant
    Filed: June 26, 2000
    Date of Patent: April 15, 2003
    Assignee: Intel Corporation
    Inventors: Lawrence T. Clark, Kimberley E. Wagner
  • Patent number: 6242951
    Abstract: An adiabatic charging logic circuit includes a logic circuit and a power supply section. The logic circuit is constituted by a plurality of logic elements. The power supply section supplies power to the logic circuit to cause the logic circuit to perform logic processing after an input signal is supplied to the gate of each of the logic elements, and stops supply of the power before a new input signal is supplied to the gate of each of the logic elements after completion of the logic processing.
    Type: Grant
    Filed: September 2, 1998
    Date of Patent: June 5, 2001
    Inventors: Shunji Nakata, Takakuni Douseki, Mitsuru Harada, Ken Takeya
  • Patent number: 6194917
    Abstract: An apparatus for and method of reducing transistor body effect when detecting and correcting a phase error between clock signals using delay-locked and phase-locked loop circuits. The clock signals are provided to an equal number of circuit elements in cross-coupled XOR circuits. The circuit includes a transconductance circuit having at least two PMOS transistors with their substrates directly connected to their sources.
    Type: Grant
    Filed: January 21, 1999
    Date of Patent: February 27, 2001
    Assignee: National Semiconductor Corporation
    Inventor: Dan Zhichao Deng
  • Patent number: 6137309
    Abstract: An Exclusive-OR logic gate with four two-by-two complementary inputs and two complementary outputs. The structure of this Exclusive-Or gate is said to be symmetrical in that the gate has a propagation time that is identical whichever of the two pairs of complementary inputs is switched over, whatever the nature of the transition at output and whatever the logic state of the pair of inputs that do not switch over. The disclosed device enables a further reduction in the differences in the time taken for the propagation of the signal edges through the gate by eliminating the floating character of certain nodes. It also relates to a frequency multiplier comprising a tree of Exclusive-Or gates such as this.
    Type: Grant
    Filed: September 23, 1998
    Date of Patent: October 24, 2000
    Assignee: STMicroelectronics S.A.
    Inventors: Pascal Couteaux, Roland Marbot
  • Patent number: 6133752
    Abstract: The tri-state logic gate circuit is preferably made up of a first inverter circuit which selectively outputs one of the power supply voltage and a ground potential, a second inverter circuit which selectively outputs one of the first inverter circuit output and the boosted power supply voltage, a resistor connected between the first and second inverter circuits, and a latch circuit. Accordingly, the tri-state logic gate circuit can avoid latch-up.
    Type: Grant
    Filed: April 7, 1998
    Date of Patent: October 17, 2000
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Masakuni Kawagoe