Patents by Inventor Rubin A. Parekhji
Rubin A. Parekhji 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: 11994559Abstract: A method for evaluating tests for fabricated integrated circuit (IC) chips includes providing, design for fault injection (DfFI) instances of an IC design that characterize activatable states of controllable elements in an IC chip based on the IC design. The method also includes fault simulating the IC design a corresponding identified test suite to determine a signature for faults and simulating the IC design with the DfFI instances activated to determine a signature for the DfFI instances. The method includes generating a DfFI-fault equivalence dictionary based on a comparison of the signature of the faults and DfFI instances and generating tests for a fabricated IC chip based on the IC design. The method includes receiving test result data characterizing the tests being applied against the fabricated IC chip with the DfFI instances activated and analyzing the test result data to determine an ability of the tests to detect the faults.Type: GrantFiled: July 22, 2022Date of Patent: May 28, 2024Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Lakshmanan Balasubramanian, Rubin Parekhji, Kalyan Chakravarthi Chekuri, Swathi G
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Patent number: 11921159Abstract: Electronic scan circuitry includes a decompressor (510), a plurality of scan chains (520.i) fed by the decompressor (510), a scan circuit (502, 504) coupled to the plurality of scan chains (520.i) to scan them in and out, a masking circuit (590) fed by the scan chains (520.i), and a scannable masking qualification circuit (550, 560, 580) coupled to the masking circuit (590), the masking qualification circuit (550, 560, 580) scannable by scan-in of bits by the decompressor (510) along with scan-in of the scan chains (520.i), and the scannable masking qualification circuit (550, 560, 580) operable to hold such scanned-in bits upon scan-out of the scan chains through the masking circuit (590). Other scan circuitry, processes, circuits, devices and systems are also disclosed.Type: GrantFiled: February 24, 2023Date of Patent: March 5, 2024Assignee: Texas Instruments IncorporatedInventors: Prakash Narayanan, Rubin A. Parekhji, Arvind Jain, Sundarrajan Subramanian
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Publication number: 20230194605Abstract: Electronic scan circuitry includes a decompressor (510), a plurality of scan chains (520.i) fed by the decompressor (510), a scan circuit (502, 504) coupled to the plurality of scan chains (520.i) to scan them in and out, a masking circuit (590) fed by the scan chains (520.i), and a scannable masking qualification circuit (550, 560, 580) coupled to the masking circuit (590), the masking qualification circuit (550, 560, 580) scannable by scan-in of bits by the decompressor (510) along with scan-in of the scan chains (520.i), and the scannable masking qualification circuit (550, 560, 580) operable to hold such scanned-in bits upon scan-out of the scan chains through the masking circuit (590). Other scan circuitry, processes, circuits, devices and systems are also disclosed.Type: ApplicationFiled: February 24, 2023Publication date: June 22, 2023Inventors: Prakash Narayanan, Rubin A, Parekhji, Arvind Jain, Sundarrajan Subramanian
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Publication number: 20230143500Abstract: A method for evaluating tests for fabricated integrated circuit (IC) chips includes providing, design for fault injection (DfFI) instances of an IC design that characterize activatable states of controllable elements in an IC chip based on the IC design. The method also includes fault simulating the IC design a corresponding identified test suite to determine a signature for faults and simulating the IC design with the DfFI instances activated to determine a signature for the DfFI instances. The method includes generating a DfFI-fault equivalence dictionary based on a comparison of the signature of the faults and DfFI instances and generating tests for a fabricated IC chip based on the IC design. The method includes receiving test result data characterizing the tests being applied against the fabricated IC chip with the DfFI instances activated and analyzing the test result data to determine an ability of the tests to detect the faults.Type: ApplicationFiled: July 22, 2022Publication date: May 11, 2023Inventors: Lakshmanan Balasubramanian, Rubin Parekhji, Kalyan Chakravarthi Chekuri, Swathi G
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Patent number: 11592483Abstract: Electronic scan circuitry includes a decompressor (510), a plurality of scan chains (520.i) fed by the decompressor (510), a scan circuit (502, 504) coupled to the plurality of scan chains (520.i) to scan them in and out, a masking circuit (590) fed by the scan chains (520.i), and a scannable masking qualification circuit (550, 560, 580) coupled to the masking circuit (590), the masking qualification circuit (550, 560, 580) scannable by scan-in of bits by the decompressor (510) along with scan-in of the scan chains (520.i), and the scannable masking qualification circuit (550, 560, 580) operable to hold such scanned-in bits upon scan-out of the scan chains through the masking circuit (590). Other scan circuitry, processes, circuits, devices and systems are also disclosed.Type: GrantFiled: August 6, 2021Date of Patent: February 28, 2023Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Prakash Narayanan, Rubin A Parekhji, Arvind Jain, Sundarrajan Subramanian
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Publication number: 20210364569Abstract: Electronic scan circuitry includes a decompressor (510), a plurality of scan chains (520.i) fed by the decompressor (510), a scan circuit (502, 504) coupled to the plurality of scan chains (520.i) to scan them in and out, a masking circuit (590) fed by the scan chains (520.i), and a scannable masking qualification circuit (550, 560, 580) coupled to the masking circuit (590), the masking qualification circuit (550, 560, 580) scannable by scan-in of bits by the decompressor (510) along with scan-in of the scan chains (520.i), and the scannable masking qualification circuit (550, 560, 580) operable to hold such scanned-in bits upon scan-out of the scan chains through the masking circuit (590). Other scan circuitry, processes, circuits, devices and systems are also disclosed.Type: ApplicationFiled: August 6, 2021Publication date: November 25, 2021Inventors: Prakash Narayanan, Rubin A, Parekhji, Arvind Jain, Sundarrajan Subramanian
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Patent number: 11119152Abstract: Electronic scan circuitry includes a decompressor (510), a plurality of scan chains (520.i) fed by the decompressor (510), a scan circuit (502, 504) coupled to the plurality of scan chains (520.i) to scan them in and out, a masking circuit (590) fed by the scan chains (520.i), and a scannable masking qualification circuit (550, 560, 580) coupled to the masking circuit (590), the masking qualification circuit (550, 560, 580) scannable by scan-in of bits by the decompressor (510) along with scan-in of the scan chains (520.i), and the scannable masking qualification circuit (550, 560, 580) operable to hold such scanned-in bits upon scan-out of the scan chains through the masking circuit (590). Other scan circuitry, processes, circuits, devices and systems are also disclosed.Type: GrantFiled: February 3, 2020Date of Patent: September 14, 2021Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Prakash Narayanan, Rubin A. Parekhji, Arvind Jain, Sundarrajan Subramanian
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Publication number: 20200174069Abstract: Electronic scan circuitry includes a decompressor (510), a plurality of scan chains (520.i) fed by the decompressor (510), a scan circuit (502, 504) coupled to the plurality of scan chains (520.i) to scan them in and out, a masking circuit (590) fed by the scan chains (520.i), and a scannable masking qualification circuit (550, 560, 580) coupled to the masking circuit (590), the masking qualification circuit (550, 560, 580) scannable by scan-in of bits by the decompressor (510) along with scan-in of the scan chains (520.i), and the scannable masking qualification circuit (550, 560, 580) operable to hold such scanned-in bits upon scan-out of the scan chains through the masking circuit (590). Other scan circuitry, processes, circuits, devices and systems are also disclosed.Type: ApplicationFiled: February 3, 2020Publication date: June 4, 2020Inventors: Prakash Narayanan, Rubin A. Parekhji, Arvind Jain, Sundarrajan Subramanian
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Patent number: 10591540Abstract: Electronic scan circuitry includes a decompressor (510), a plurality of scan chains (520.i) fed by the decompressor (510), a scan circuit (502, 504) coupled to the plurality of scan chains (520.i) to scan them in and out, a masking circuit (590) fed by the scan chains (520.i), and a scannable masking qualification circuit (550, 560, 580) coupled to the masking circuit (590), the masking qualification circuit (550, 560, 580) scannable by scan-in of bits by the decompressor (510) along with scan-in of the scan chains (520.i), and the scannable masking qualification circuit (550, 560, 580) operable to hold such scanned-in bits upon scan-out of the scan chains through the masking circuit (590). Other scan circuitry, processes, circuits, devices and systems are also disclosed.Type: GrantFiled: March 19, 2018Date of Patent: March 17, 2020Assignee: Texas Instruments IncorporatedInventors: Prakash Narayanan, Rubin A. Parekhji, Arvind Jain, Sundarrajan Subramanian
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Publication number: 20180210030Abstract: Electronic scan circuitry includes a decompressor (510), a plurality of scan chains (520.i) fed by the decompressor (510), a scan circuit (502, 504) coupled to the plurality of scan chains (520.i) to scan them in and out, a masking circuit (590) fed by the scan chains (520.i), and a scannable masking qualification circuit (550, 560, 580) coupled to the masking circuit (590), the masking qualification circuit (550, 560, 580) scannable by scan-in of bits by the decompressor (510) along with scan-in of the scan chains (520.i), and the scannable masking qualification circuit (550, 560, 580) operable to hold such scanned-in bits upon scan-out of the scan chains through the masking circuit (590). Other scan circuitry, processes, circuits, devices and systems are also disclosed.Type: ApplicationFiled: March 19, 2018Publication date: July 26, 2018Inventors: Prakash Narayanan, Rubin A. Parekhji, Arvind Jain, Sundarrajan Subramanian
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Patent number: 9952283Abstract: Electronic scan circuitry includes a decompressor (510), a plurality of scan chains (520.i) fed by the decompressor (510), a scan circuit (502, 504) coupled to the plurality of scan chains (520.i) to scan them in and out, a masking circuit (590) fed by the scan chains (520.i), and a scannable masking qualification circuit (550, 560, 580) coupled to the masking circuit (590), the masking qualification circuit (550, 560, 580) scannable by scan-in of bits by the decompressor (510) along with scan-in of the scan chains (520.i), and the scannable masking qualification circuit (550, 560, 580) operable to hold such scanned-in bits upon scan-out of the scan chains through the masking circuit (590). Other scan circuitry, processes, circuits, devices and systems are also disclosed.Type: GrantFiled: November 18, 2015Date of Patent: April 24, 2018Assignee: Texas Instruments IncorporatedInventors: Prakash Narayanan, Rubin A. Parekhji, Arvind Jain, Sundarrajan Subramanian
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Patent number: 9581645Abstract: A testable integrated circuit chip (80, 100) includes a functional circuit (80) having modules (IP.i), a storage circuit (110) operable to hold a table representing sets of compatible tests that are compatible for concurrence, and an on-chip test controller (140, 150) coupled with the storage circuit (110) and with the functional circuit modules (IP.i. The test controller (140, 150) is operable to dynamically schedule and trigger the tests in those sets, which promotes concurrent execution of tests in the functional circuit modules (IP.i). Other circuits, wireless chips, systems, and processes of operation and processes of manufacture are disclosed.Type: GrantFiled: February 12, 2014Date of Patent: February 28, 2017Assignee: Texas Instruments IncorporatedInventors: Adesh Sontakke, Rajesh Kumar Mittal, Rubin A. Parekhji, Upendra Narayan Tripathi
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Publication number: 20160069958Abstract: Electronic scan circuitry includes a decompressor (510), a plurality of scan chains (520.i) fed by the decompressor (510), a scan circuit (502, 504) coupled to the plurality of scan chains (520.i) to scan them in and out, a masking circuit (590) fed by the scan chains (520.i), and a scannable masking qualification circuit (550, 560, 580) coupled to the masking circuit (590), the masking qualification circuit (550, 560, 580) scannable by scan-in of bits by the decompressor (510) along with scan-in of the scan chains (520.i), and the scannable masking qualification circuit (550, 560, 580) operable to hold such scanned-in bits upon scan-out of the scan chains through the masking circuit (590). Other scan circuitry, processes, circuits, devices and systems are also disclosed.Type: ApplicationFiled: November 18, 2015Publication date: March 10, 2016Inventors: Prakash Narayanan, Rubin A. Parekhji, Arvind Jain, Sundarrajan Subramanian
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Patent number: 9229055Abstract: Electronic scan circuitry includes a decompressor (510), a plurality of scan chains (520.i) fed by the decompressor (510), a scan circuit (502, 504) coupled to the plurality of scan chains (520.i) to scan them in and out, a masking circuit (590) fed by the scan chains (520.i), and a scannable masking qualification circuit (550, 560, 580) coupled to the masking circuit (590), the masking qualification circuit (550, 560, 580) scannable by scan-in of bits by the decompressor (510) along with scan-in of the scan chains (520.i), and the scannable masking qualification circuit (550, 560, 580) operable to hold such scanned-in bits upon scan-out of the scan chains through the masking circuit (590). Other scan circuitry, processes, circuits, devices and systems are also disclosed.Type: GrantFiled: June 18, 2015Date of Patent: January 5, 2016Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Prakash Narayanan, Arvind Jain, Sundarrajan Subramanian, Rubin A. Parekhji
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Publication number: 20150285860Abstract: Electronic scan circuitry includes a decompressor (510), a plurality of scan chains (520.i) fed by the decompressor (510), a scan circuit (502, 504) coupled to the plurality of scan chains (520.i) to scan them in and out, a masking circuit (590) fed by the scan chains (520.i), and a scannable masking qualification circuit (550, 560, 580) coupled to the masking circuit (590), the masking qualification circuit (550, 560, 580) scannable by scan-in of bits by the decompressor (510) along with scan-in of the scan chains (520.i), and the scannable masking qualification circuit (550, 560, 580) operable to hold such scanned-in bits upon scan-out of the scan chains through the masking circuit (590). Other scan circuitry, processes, circuits, devices and systems are also disclosed.Type: ApplicationFiled: June 18, 2015Publication date: October 8, 2015Inventors: Prakash Narayanan, Arvind Jain, Sundarrajan Subramanian, Rubin A. Parekhji
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Patent number: 9091729Abstract: Electronic scan circuitry includes a decompressor (510), a plurality of scan chains (520.i) fed by the decompressor (510), a scan circuit (502, 504) coupled to the plurality of scan chains (520.i) to scan them in and out, a masking circuit (590) fed by the scan chains (520.i), and a scannable masking qualification circuit (550, 560, 580) coupled to the masking circuit (590), the masking qualification circuit (550, 560, 580) scannable by scan-in of bits by the decompressor (510) along with scan-in of the scan chains (520.i), and the scannable masking qualification circuit (550, 560, 580) operable to hold such scanned-in bits upon scan-out of the scan chains through the masking circuit (590). Other scan circuitry, processes, circuits, devices and systems are also disclosed.Type: GrantFiled: September 16, 2014Date of Patent: July 28, 2015Assignee: TEXAS INSTRUMENTS INCORPORATEDInventors: Prakash Narayanan, Arvind Jain, Sundarrajan Subramanian, Rubin A. Parekhji
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Publication number: 20150006987Abstract: Electronic scan circuitry includes a decompressor (510), a plurality of scan chains (520.i) fed by the decompressor (510), a scan circuit (502, 504) coupled to the plurality of scan chains (520.i) to scan them in and out, a masking circuit (590) fed by the scan chains (520.i), and a scannable masking qualification circuit (550, 560, 580) coupled to the masking circuit (590), the masking qualification circuit (550, 560, 580) scannable by scan-in of bits by the decompressor (510) along with scan-in of the scan chains (520.i), and the scannable masking qualification circuit (550, 560, 580) operable to hold such scanned-in bits upon scan-out of the scan chains through the masking circuit (590). Other scan circuitry, processes, circuits, devices and systems are also disclosed.Type: ApplicationFiled: September 16, 2014Publication date: January 1, 2015Applicant: Texas Instruments IncorporatedInventors: Prakash Narayanan, Arvind Jain, Sundarrajan Subramanian, Rubin A. Parekhji
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Patent number: 8887018Abstract: Electronic scan circuitry includes a decompressor (510), a plurality of scan chains (520.i) fed by the decompressor (510), a scan circuit (502, 504) coupled to the plurality of scan chains (520.i) to scan them in and out, a masking circuit (590) fed by the scan chains (520.i), and a scannable masking qualification circuit (550, 560, 580) coupled to the masking circuit (590), the masking qualification circuit (550, 560, 580) scannable by scan-in of bits by the decompressor (510) along with scan-in of the scan chains (520.i), and the scannable masking qualification circuit (550, 560, 580) operable to hold such scanned-in bits upon scan-out of the scan chains through the masking circuit (590). Other scan circuitry, processes, circuits, devices and systems are also disclosed.Type: GrantFiled: October 14, 2010Date of Patent: November 11, 2014Assignee: Texas Instruments IncorporatedInventors: Prakash Narayanan, Arvind Jain, Sundarrajan Subramanian, Rubin A. Parekhji
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Publication number: 20140232422Abstract: A testable integrated circuit chip (80, 100) includes a functional circuit (80) having modules (IP.i), a storage circuit (110) operable to hold a table representing sets of compatible tests that are compatible for concurrence, and an on-chip test controller (140, 150) coupled with said storage circuit (110) and with said functional circuit modules (IP.i), said test controller (140, 150) operable to dynamically schedule and trigger the tests in those sets, whereby promoting concurrent execution of tests in said functional circuit modules (IP.i). Other circuits, wireless chips, systems, and processes of operation and processes of manufacture are disclosed.Type: ApplicationFiled: February 12, 2014Publication date: August 21, 2014Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Adesh Sontakke, Rajesh Kumar Mittal, Rubin A. Parekhji, Upendra Narayan Tripathi
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Patent number: 8694276Abstract: A testable integrated circuit chip (80, 100) includes a functional circuit (80) having modules (IP.i), a storage circuit (110) operable to hold a table representing sets of compatible tests that are compatible for concurrence, and an on-chip test controller (140, 150) coupled with said storage circuit (110) and with said functional circuit modules (IP.i), said test controller (140, 150) operable to dynamically schedule and trigger the tests in those sets, whereby promoting concurrent execution of tests in said functional circuit modules (IP.i). Other circuits, wireless chips, systems, and processes of operation and processes of manufacture are disclosed.Type: GrantFiled: March 8, 2011Date of Patent: April 8, 2014Assignee: Texas Instruments IncorporatedInventors: Adesh Sharadrao Sontakke, Rajesh Kumar Mittal, Rubin A. Parekhji, Upendra Narayan Tripathi