Patents by Inventor Suryanarayana Duggirala
Suryanarayana Duggirala 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).
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Patent number: 11829692Abstract: Training data may be collected based on a set of test-case configurations for each integrated circuit (IC) design in a set of IC designs. The training data may include a set of features extracted from each IC design, and a count of test cycles required for achieving a target test coverage for each test-case configuration. A machine learning (ML) model may be trained using the training data to obtain a trained ML model. The trained ML model may be used to predict a set of ranked test-case configurations for a given IC design based on features extracted from the given IC design.Type: GrantFiled: June 11, 2021Date of Patent: November 28, 2023Assignee: Synopsys, Inc.Inventors: Apik A Zorian, Fadi Maamari, Suryanarayana Duggirala, Mahilchi Milir Vaseekar Kumar, Basim Mohammed Issa Shanyour
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Publication number: 20230205960Abstract: Generating an integrated circuit (IC) includes receiving Design For Testability (DFT) Compressor Decompressor (CODEC) circuitry of an integrated circuit (IC) design, and partitioning the DFT CODEC circuitry into two or more sub-blocks based on a number of scan chains within the IC design. Further, scan chains are assigned to each of the two or more sub-blocks based on locations of end points within the scan chains. A layout of the IC design is generated by placing the DFT CODEC circuitry within the IC design based the locations of end points within the scan chains and the assigned scan chains to each of the two or more sub-blocks.Type: ApplicationFiled: December 29, 2022Publication date: June 29, 2023Inventors: Farasoa Nathalie ETONO, Rajeev MURGAI, Daniel Eugenio DURÁN, Manoj GUPTA, Suryanarayana DUGGIRALA, Menno Ewout VERBEEK, Tihomir SOKCEVIC
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Patent number: 7900105Abstract: A low overhead dynamically reconfigurable shared scan-in test architecture is provided. This test architecture advantageously allows for changing scan inputs during the scan operation on a per shift basis. The flexibility of reconfiguring the scan input to scan chain mapping every shift cycle can advantageously reduce both test data volume and test application time.Type: GrantFiled: May 12, 2010Date of Patent: March 1, 2011Assignee: Synopsys, Inc.Inventors: Rohit Kapur, Nodari Sitchinava, Samitha Samaranayake, Emil Gizdarski, Frederic J. Neuveux, Suryanarayana Duggirala, Thomas W. Williams
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Patent number: 7836368Abstract: A low overhead dynamically reconfigurable shared scan-in test architecture is provided. This test architecture advantageously allows for changing scan inputs during the scan operation on a per shift basis. The flexibility of reconfiguring the scan input to scan chain mapping every shift cycle can advantageously reduce both test data volume and test application time.Type: GrantFiled: August 24, 2009Date of Patent: November 16, 2010Assignee: Synopsys, Inc.Inventors: Rohit Kapur, Nodari Sitchinava, Samitha Samaranayake, Emil Gizdarski, Frederic J. Neuveux, Suryanarayana Duggirala, Thomas W. Williams
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Patent number: 7836367Abstract: A low overhead dynamically reconfigurable shared scan-in test architecture is provided. This test architecture advantageously allows for changing scan inputs during the scan operation on a per shift basis. The flexibility of reconfiguring the scan input to scan chain mapping every shift cycle can advantageously reduce both test data volume and test application time.Type: GrantFiled: August 11, 2009Date of Patent: November 16, 2010Assignee: Synopsys, Inc.Inventors: Rohit Kapur, Nodari Sitchinava, Samitha Samaranayake, Emil Gizdarski, Frederic J. Neuveux, Suryanarayana Duggirala, Thomas W. Williams
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Publication number: 20100223516Abstract: A low overhead dynamically reconfigurable shared scan-in test architecture is provided. This test architecture advantageously allows for changing scan inputs during the scan operation on a per shift basis. The flexibility of reconfiguring the scan input to scan chain mapping every shift cycle can advantageously reduce both test data volume and test application time.Type: ApplicationFiled: May 12, 2010Publication date: September 2, 2010Applicant: Synopsys, Inc.Inventors: Rohit Kapur, Nodari Sitchinava, Samitha Samaranayake, Emil Gizdarski, Frederic Neuveux, Suryanarayana Duggirala, Thomas W. Williams
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Patent number: 7774663Abstract: A low overhead dynamically reconfigurable shared scan-in test architecture is provided. This test architecture advantageously allows for changing scan inputs during the scan operation on a per shift basis. The flexibility of reconfiguring the scan input to scan chain mapping every shift cycle can advantageously reduce both test data volume and test application time.Type: GrantFiled: July 9, 2009Date of Patent: August 10, 2010Assignee: Synopsys, Inc.Inventors: Rohit Kapur, Nodari Sitchinava, Samitha Samaranayake, Emil Gizdarski, Frederic J. Neuveux, Suryanarayana Duggirala, Thomas W. Williams
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Patent number: 7743299Abstract: A low overhead dynamically reconfigurable shared scan-in test architecture is provided. This test architecture advantageously allows for changing scan inputs during the scan operation on a per shift basis. The flexibility of reconfiguring the scan input to scan chain mapping every shift cycle can advantageously reduce both test data volume and test application time.Type: GrantFiled: July 23, 2008Date of Patent: June 22, 2010Assignee: Synopsys, Inc.Inventors: Rohit Kapur, Nodari Sitchinava, Samitha Samaranayake, Emil Gizdarski, Frederic J. Neuveux, Suryanarayana Duggirala, Thomas W. Williams
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Publication number: 20100031101Abstract: A low overhead dynamically reconfigurable shared scan-in test architecture is provided. This test architecture advantageously allows for changing scan inputs during the scan operation on a per shift basis. The flexibility of reconfiguring the scan input to scan chain mapping every shift cycle can advantageously reduce both test data volume and test application time.Type: ApplicationFiled: August 11, 2009Publication date: February 4, 2010Applicant: Synopsys, Inc.Inventors: Rohit Kapur, Nodari Sitchinava, Samitha Samaranayake, Emil Gizdarski, Frederic Neuveux, Suryanarayana Duggirala, Thomas W. Williams
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Publication number: 20090313514Abstract: A low overhead dynamically reconfigurable shared scan-in test architecture is provided. This test architecture advantageously allows for changing scan inputs during the scan operation on a per shift basis. The flexibility of reconfiguring the scan input to scan chain mapping every shift cycle can advantageously reduce both test data volume and test application time.Type: ApplicationFiled: August 24, 2009Publication date: December 17, 2009Applicant: Synopsys, Inc.Inventors: Rohit Kapur, Nodari Sitchinava, Samitha Samaranayake, Emil Gizdarski, Frederic Neuveux, Suryanarayana Duggirala, Thomas W. Williams
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Publication number: 20090271673Abstract: A low overhead dynamically reconfigurable shared scan-in test architecture is provided. This test architecture advantageously allows for changing scan inputs during the scan operation on a per shift basis. The flexibility of reconfiguring the scan input to scan chain mapping every shift cycle can advantageously reduce both test data volume and test application time.Type: ApplicationFiled: July 9, 2009Publication date: October 29, 2009Applicant: Synopsys, Inc.Inventors: Rohit Kapur, Nodari Sitchinava, Samitha Samaranayake, Emil Gizdarski, Frederic J. Neuveux, Suryanarayana Duggirala, Thomas W. Williams
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Patent number: 7596733Abstract: A low overhead dynamically reconfigurable shared scan-in test architecture is provided. This test architecture advantageously allows for changing scan inputs during the scan operation on a per shift basis. The flexibility of reconfiguring the scan input to scan chain mapping every shift cycle can advantageously reduce both test data volume and test application time.Type: GrantFiled: July 23, 2008Date of Patent: September 29, 2009Assignee: Synopsys, Inc.Inventors: Rohit Kapur, Nodari Sitchinava, Samitha Samaranayake, Emil Gizdarski, Frederic J. Neuveux, Suryanarayana Duggirala, Thomas W. Williams
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Publication number: 20080301510Abstract: A low overhead dynamically reconfigurable shared scan-in test architecture is provided. This test architecture advantageously allows for changing scan inputs during the scan operation on a per shift basis. The flexibility of reconfiguring the scan input to scan chain mapping every shift cycle can advantageously reduce both test data volume and test application time.Type: ApplicationFiled: July 23, 2008Publication date: December 4, 2008Applicant: Synopsys, Inc.Inventors: Rohit Kapur, Nodari Sitchinava, Samitha Samaranayake, Emil Gizdarski, Frederic Neuveux, Suryanarayana Duggirala, Thomas W. Williams
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Publication number: 20080294955Abstract: A low overhead dynamically reconfigurable shared scan-in test architecture is provided. This test architecture advantageously allows for changing scan inputs during the scan operation on a per shift basis. The flexibility of reconfiguring the scan input to scan chain mapping every shift cycle can advantageously reduce both test data volume and test application time.Type: ApplicationFiled: July 23, 2008Publication date: November 27, 2008Applicant: Synopsys, Inc.Inventors: Rohit Kapur, Nodari Sitchinava, Samitha Samaranayake, Emil Gizdarski, Frederic Neuveux, Suryanarayana Duggirala, Thomas W. Williams
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Patent number: 7418640Abstract: A low overhead dynamically reconfigurable shared scan-in test architecture is provided. This test architecture advantageously allows for changing scan inputs during the scan operation on a per shift basis. The flexibility of reconfiguring the scan input to scan chain mapping every shift cycle can advantageously reduce both test data volume and test application time.Type: GrantFiled: May 28, 2004Date of Patent: August 26, 2008Assignee: Synopsys, Inc.Inventors: Rohit Kapur, Nodari Sitchinava, Samitha Samaranayake, Emil Gizdarski, Frederic Neuveux, Suryanarayana Duggirala, Thomas W. Williams
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Publication number: 20050268190Abstract: A low overhead dynamically reconfigurable shared scan-in test architecture is provided. This test architecture advantageously allows for changing scan inputs during the scan operation on a per shift basis. The flexibility of reconfiguring the scan input to scan chain mapping every shift cycle can advantageously reduce both test data volume and test application time.Type: ApplicationFiled: May 28, 2004Publication date: December 1, 2005Applicant: Synopsys, Inc.Inventors: Rohit Kapur, Nodari Sitchinava, Samitha Samaranayake, Emil Gizdarski, Frederic Neuveux, Suryanarayana Duggirala, Thomas Williams
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Patent number: 6766501Abstract: A process and system for placement planning for test mode circuitry of an integrated circuit design. The novel method includes the steps of partitioning a scan chain of a netlist into sets of re-orderable scan cells. The netlist is passed to layout processes and therein the scan cells of the scan chain are re-ordered based on the sets. According to one embodiment of the present invention, the scan-chain is partitioned into a number of different sets based the respective clock domains, edge sensitivity types, skew tolerance levels, surrounding cone logic, reconfigurability and simultaneous output switching requirements of the scan cells. Data representative of the resulting sets are then provided to the place-and-route processes to be used as re-ordering limitations. Particularly, the re-ordering limitations restrict the rearrangement of scan cells among different sets. The placement and routing processes, however, are not restricted from rearranging the order of scan cells within the same set.Type: GrantFiled: August 12, 2002Date of Patent: July 20, 2004Assignee: Synopsys, Inc.Inventors: Suryanarayana Duggirala, Rohit Kapur, Thomas W. Williams
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Patent number: 6434733Abstract: A process and system for placement planning for test mode circuitry of an integrated circuit design. The novel method includes the steps of partitioning a scan chain of a netlist into sets of re-orderable scan cells. The netlist is passed to layout processes and therein the scan cells of the scan chain are re-ordered based on the sets. According to one embodiment of the present invention, the scan-chain is partitioned into a number of different sets based the respective clock domains, edge sensitivity types skew tolerance levels, surrounding cone logic, reconfigurability and simultaneous output switching requirements of the scan cells. Data representative of the resulting sets are then provided to the place-and-route processes to be used as re-ordering limitations. Particularly, the re-ordering limitations restrict the rearrangement of scan cells among different sets. The placement and routing processes, however, are not restricted from rearranging the order of scan cells within the same set.Type: GrantFiled: March 24, 1999Date of Patent: August 13, 2002Assignee: Synopsys, Inc.Inventors: Suryanarayana Duggirala, Rohit Kapur, Thomas W. Williams
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Patent number: 6405355Abstract: A computer implemented method of constructing a scan chain. According to the present invention, scan cells are inserted into a netlist description of an integrated circuit design and are coupled serially together to form a scan chain. The resulting netlist is then passed to layout processes where the cells of the integrated circuit design are automatically placed and routed. The layout processes are performed without regard to any predetermined constraints designating any particular functional pins of the netlist design as scan-in or scan-out ports for the scan chain. After the cells are placed, a first functional pin is selected as the scan-in port and a second functional pin is selected as the scan-out port according to cell placement information. In particular, the functional pin that is closest to the leading scan cell is selected as the scan-in port. The functional pin that is closest to the last scan cell is selected as the scan-out port for the scan chain.Type: GrantFiled: March 31, 1999Date of Patent: June 11, 2002Assignee: Synopsys, Inc.Inventors: Suryanarayana Duggirala, Rohit Kapur, Thomas W. Williams
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Patent number: 6269463Abstract: A method and system for generating test vectors for testing scan-based sequential circuits that contain non-scan cells using combinational ATPG techniques. The present invention includes the computer implemented step of receiving a netlist description of an integrated circuit device that comprises scan cells and non-scannable cells. Under certain conditions, some non-scan cells may exhibit sequential transparency behavior. The present invention identifies such conditions and characterizes each non-scan cell as sequentially transparent or non-transparent. Based on such characterization, the present invention transforms non-scan cells exhibiting sequential transparency behavior with transparent logic models during combinational ATPG (Automatic Test Pattern Generation) analysis. Because non-scan cells of exhibiting sequential transparency behavior are not replaced with “force-to-X” models, the fault coverage of the test patterns thus generated is significantly improved.Type: GrantFiled: March 31, 1999Date of Patent: July 31, 2001Assignee: Synopsys, Inc.Inventors: Suryanarayana Duggirala, Harihara Ganesan, Cyrus Hay