Patents by Inventor Ed Seewann

Ed Seewann has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7600071
    Abstract: An integrated circuit includes a circuit output, a data input that receives a data signal, and a clock input that receives a clock signal. The integrated circuit further includes first and second logic gates. The first logic gate has a first input coupled to the clock input, a second input coupled to the data input, and an output and a second logic gate. The second logic gate has a first input coupled to the data input, a second input coupled to the output of the first logic gate, and an output coupled to the circuit output. Setup time of the data signal relative to the clock signal at the second logic gate is improved by reciprocal gating of the data and clock signals.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: October 6, 2009
    Assignee: International Business Machines Corporation
    Inventor: Ed Seewann
  • Patent number: 7501854
    Abstract: An integrated circuit includes a data node, an output node, and set logic coupling to the data node to the output node. The set logic changes a state of the output node in response to a change in state of the data node. The integrated circuit also includes a reset transistor, coupled to the data node, that resets the data node to a first state in response to a transition in a timing signal, an input transistor, coupled to the data node, that asserts the data node to a second state in response to receipt of a data signal, and reset logic coupled between the output node and the data node. The first reset logic resets the output node to an original state in response to resetting of the data node if the output node achieves a set state. The integrated circuit further includes feedback logic coupled between the output node and a reset input node of the reset logic that limits a duration of operation of the reset logic.
    Type: Grant
    Filed: December 7, 2006
    Date of Patent: March 10, 2009
    Assignee: International Business Machines Corporation
    Inventor: Ed Seewann
  • Publication number: 20080137468
    Abstract: An integrated circuit includes a circuit output, a data input that receives a data signal, and a clock input that receives a clock signal. The integrated circuit further includes first and second logic gates. The first logic gate has a first input coupled to the clock input, a second input coupled to the data input, and an output and a second logic gate. The second logic gate has a first input coupled to the data input, a second input coupled to the output of the first logic gate, and an output coupled to the circuit output. Setup time of the data signal relative to the clock signal at the second logic gate is improved by reciprocal gating of the data and clock signals.
    Type: Application
    Filed: December 7, 2006
    Publication date: June 12, 2008
    Inventor: Ed Seewann
  • Publication number: 20080136452
    Abstract: An integrated circuit includes a data node, an output node, and set logic coupling to the data node to the output node. The set logic changes a state of the output node in response to a change in state of the data node. The integrated circuit also includes a reset transistor, coupled to the data node, that resets the data node to a first state in response to a transition in a timing signal, an input transistor, coupled to the data node, that asserts the data node to a second state in response to receipt of a data signal, and reset logic coupled between the output node and the data node. The first reset logic resets the output node to an original state in response to resetting of the data node if the output node achieves a set state. The integrated circuit further includes feedback logic coupled between the output node and a reset input node of the reset logic that limits a duration of operation of the reset logic.
    Type: Application
    Filed: December 7, 2006
    Publication date: June 12, 2008
    Inventor: Ed Seewann
  • Patent number: 7283404
    Abstract: A content addressable memory (CAM) system is disclosed including a dual mode cycle boundary latch (CBL). The CBL includes a master latch coupled to a slave latch. The CBL operates in a high speed functional mode and a lower speed test mode. In the high speed functional mode, input data bypasses the master latch and transports directly to the CBL output via the slave latch. The CBL effectively removes the master latch from the circuit in the high speed functional mode. However, in the lower speed test mode, input test data travels via both the master and slave latches to the CBL output.
    Type: Grant
    Filed: February 11, 2005
    Date of Patent: October 16, 2007
    Assignee: International Business Machines Corporation
    Inventors: Masood Ahmed Khan, Michael Ju Hyeok Lee, Ed Seewann
  • Patent number: 7167385
    Abstract: A CAM system is disclosed in which compare data, for example an address translation request, is provided as input search data to a search line generator. The search line generator presents search line input data, through a buffer, to CAM and RAM array systems that include dynamically precharged and evaluated memory cells. Timing sequences in the CAM system are controlled by a series of individually triggered one shot pulse generators. The one shot pulse generators control the timing of CAM system activities, for example the precharge of CAM subsystems, so that these activities are staggered in time. This timing approach improves power consumption and evaluation time within the CAM system. By distributing precharging activities in time throughout the CAM cycle, current peaking during the CAM cycle is reduced. The CAM system latches results in an output latch that is controlled by a one shot pulse generator.
    Type: Grant
    Filed: February 11, 2005
    Date of Patent: January 23, 2007
    Assignee: International Business Machines Corporation
    Inventors: Yuen Hung Chan, Masood Ahmed Khan, Michael Ju Hyeok Lee, Ed Seewann
  • Patent number: 7116569
    Abstract: A CAM system is disclosed in which requests for address translation are provided as input search data to a dynamic compare bitline generator. The dynamic compare bitline generator also receives a compare mask and applies the compare mask to associated input search data bits on a per bit basis. The mask contains information that specifies a selected page size and a selected logic mode that can be applied to a compare array in which the specified search is conducted. The compare array is coupled to a data array to which the compare array indicates a result of the search.
    Type: Grant
    Filed: February 11, 2005
    Date of Patent: October 3, 2006
    Assignee: International Business Machines Corporation
    Inventors: Joaquin Hinojosa, Eric Jason Fluhr, Michael Ju Hyeok Lee, Jose Angel Paredes, Ed Seewann
  • Publication number: 20060181909
    Abstract: A CAM system is disclosed in which requests for address translation are provided as input search data to a dynamic compare bitline generator. The dynamic compare bitline generator also receives a compare mask and applies the compare mask to associated input search data bits on a per bit basis. The mask contains information that specifies a selected page size and a selected logic mode that can be applied to a compare array in which the specified search is conducted. The compare array is coupled to a data array to which the compare array indicates a result of the search.
    Type: Application
    Filed: February 11, 2005
    Publication date: August 17, 2006
    Applicant: International Business Machines Corporation
    Inventors: Joaquin Hinojosa, Eric Fluhr, Michael Lee, Jose Paredes, Ed Seewann
  • Publication number: 20060181910
    Abstract: A content addressable memory (CAM) system is disclosed including a dual mode cycle boundary latch (CBL). The CBL includes a master latch coupled to a slave latch. The CBL operates in a high speed functional mode and a lower speed test mode. In the high speed functional mode, input data bypasses the master latch and transports directly to the CBL output via the slave latch. The CBL effectively removes the master latch from the circuit in the high speed functional mode. However, in the lower speed test mode, input test data travels via both the master and slave latches to the CBL output.
    Type: Application
    Filed: February 11, 2005
    Publication date: August 17, 2006
    Applicant: International Business Machines Corporation
    Inventors: Masood Khan, Michael Hyeok Lee, Ed Seewann
  • Publication number: 20060181908
    Abstract: A CAM system is disclosed in which compare data, for example an address translation request, is provided as input search data to a search line generator. The search line generator presents search line input data, through a buffer, to CAM and RAM array systems that include dynamically precharged and evaluated memory cells. Timing sequences in the CAM system are controlled by a series of individually triggered one shot pulse generators. The one shot pulse generators control the timing of CAM system activities, for example the precharge of CAM subsystems, so that these activities are staggered in time. This timing approach improves power consumption and evaluation time within the CAM system. By distributing precharging activities in time throughout the CAM cycle, current peaking during the CAM cycle is reduced. The CAM system latches results in an output latch that is controlled by a one shot pulse generator.
    Type: Application
    Filed: February 11, 2005
    Publication date: August 17, 2006
    Applicant: International Business Machines Corporation
    Inventors: Yuen Chan, Masood Khan, Michael Lee, Ed Seewann