GB2214319B - Automatic test equipment - Google Patents

Automatic test equipment

Info

Publication number
GB2214319B
GB2214319B GB8902317A GB8902317A GB2214319B GB 2214319 B GB2214319 B GB 2214319B GB 8902317 A GB8902317 A GB 8902317A GB 8902317 A GB8902317 A GB 8902317A GB 2214319 B GB2214319 B GB 2214319B
Authority
GB
United Kingdom
Prior art keywords
local
differential
measuring circuit
inputs
time measuring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
GB8902317A
Other versions
GB2214319A (en
GB8902317D0 (en
Inventor
William Joseph Bowhers
Michael Rodney Ferland
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Teradyne Inc
Original Assignee
Teradyne Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US07/003,951 external-priority patent/US4792932A/en
Priority claimed from US07/003,945 external-priority patent/US4755765A/en
Priority claimed from GB8800917A external-priority patent/GB2200465B/en
Application filed by Teradyne Inc filed Critical Teradyne Inc
Priority to GB8902317A priority Critical patent/GB2214319B/en
Publication of GB8902317D0 publication Critical patent/GB8902317D0/en
Publication of GB2214319A publication Critical patent/GB2214319A/en
Application granted granted Critical
Publication of GB2214319B publication Critical patent/GB2214319B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/317—Testing of digital circuits
    • G01R31/3181—Functional testing
    • G01R31/319—Tester hardware, i.e. output processing circuits
    • G01R31/3193—Tester hardware, i.e. output processing circuits with comparison between actual response and known fault free response
    • G01R31/31937—Timing aspects, e.g. measuring propagation delay
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
    • G01R31/2834—Automated test systems [ATE]; using microprocessors or computers

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Tests Of Electronic Circuits (AREA)

Abstract

Apparatus for automatically testing electronic circuits (16) includes an AC measurement system (32, 22) and a time measuring circuit (18) for counting clock pulses provided between stop and start event edges presented to it. Two independent input selectors (54, 56) each selectively connect one of a plurality of its inputs to the time measuring circuit, and a plurality of local timing comparators (26, 28) generate an event edge upon receiving a signal crossing a threshold value. Also disclosed are making time measurements of signals at digital and analog pins using local comparators connected to input selectors over deskewed transmission paths and connecting a local comparator (68, 70) to the filter output of an AC measurement instrument (62, 63); and a differential input selector (Fig 2 not shown) for selectively connecting one of a plurality of differential inputs (118) to a differential output (122). <IMAGE>
GB8902317A 1987-01-16 1989-02-02 Automatic test equipment Expired - Lifetime GB2214319B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8902317A GB2214319B (en) 1987-01-16 1989-02-02 Automatic test equipment

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US07/003,951 US4792932A (en) 1987-01-16 1987-01-16 Time measurement in automatic test equipment
US07/003,945 US4755765A (en) 1987-01-16 1987-01-16 Differential input selector
GB8800917A GB2200465B (en) 1987-01-16 1988-01-15 Automatic test equipment
GB8902317A GB2214319B (en) 1987-01-16 1989-02-02 Automatic test equipment

Publications (3)

Publication Number Publication Date
GB8902317D0 GB8902317D0 (en) 1989-03-22
GB2214319A GB2214319A (en) 1989-08-31
GB2214319B true GB2214319B (en) 1991-09-25

Family

ID=27263745

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8902317A Expired - Lifetime GB2214319B (en) 1987-01-16 1989-02-02 Automatic test equipment

Country Status (1)

Country Link
GB (1) GB2214319B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2251081B (en) * 1990-12-18 1995-08-23 Motorola Ltd Automatic analysis apparatus
US5101150A (en) * 1991-02-22 1992-03-31 Genrad, Inc. Automatic circuit tester with separate instrument and scanner buses
GB2261957B (en) * 1991-11-16 1995-05-17 Voltech Instr Ltd Apparatus for testing wound components
GB2274716A (en) * 1992-09-22 1994-08-03 Mistrock Microsystems Limited Circuit tester
US5418470A (en) * 1993-10-22 1995-05-23 Tektronix, Inc. Analog multi-channel probe system

Also Published As

Publication number Publication date
GB2214319A (en) 1989-08-31
GB8902317D0 (en) 1989-03-22

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20070115