Patent US4168429A successfully refreshed from Google Patents.
US5097205A
Expired / Lapsed
US
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Ic chip test circuit for high frequency integrated circuits
Assignee: Toshiba Corp
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Filing: 1990-04-06
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Granted: 1992-03-17
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Expires: 2010-04-06
Abstract
Abstract In an IC device, an IC body having a predetermined function and high-frequency circuits for testing high-frequency characteristics of the IC body are formed on a single chip. The test circuits include an L-H frequency conversion circuit arranged on the input side of the IC body and an H-L frequency conversion circuit arranged on the output side. The test circuits can switch a connecting state between the conversion circuits and the IC body in response to an external control signal. The test circuits can be disconnected from the IC body after a test is completed.
Inventors
- 👤 Nobuyuki Toyoda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:48
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/28; G01R31/30; G06; G06F; G06F11/00; G06F11/22; G06F11/26; G06F11/273; G06F11/2733; G01R31/317; G01R31/3181; G01R31/319; G01R31/31903; G01R31/31905
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
63 words
An IC device characterized by comprising an IC body having input and output sections, and high-frequency circuits for testing high-frequency characteristics of said IC body on a single chip, said circuits including an L-H frequency conversion circuit arranged on the input section side of said IC body, and an H-L frequency conversion circuit arranged on the output section side of said IC body.
Claim 2
Dependent Claim
63 words
An IC device characterized by comprising an IC body having input and output sections, and high-frequency circuits for testing high-frequency characteristics of said IC body on a single chip, said circuits including an L-H frequency conversion circuit arranged on the input section side of said IC body, and an H-L frequency conversion circuit arranged on the output section side of said IC body.
Claim 3
Dependent Claim
39 words
An IC device according to claim 1, wherein said L-H frequency conversion circuit comprises a multiplexer for converting low-frequency data into high-frequency data, and said H-L frequency conversion circuit comprises a demultiplexer for converting high-frequency data into low-frequency data.
Claim 4
Dependent Claim
32 words
An IC device according to claim 1, wherein said circuits comprise means for switching a connecting state between said conversion circuits and said IC body in response to an external control signal.
Claim 5
Dependent Claim
29 words
An IC device according to claim 1, wherein said circuits are arranged around said IC body, and can be disconnected from said IC body after a test is completed.
References Cited (Backward Citations)
US4278897A
Cited
US4697095A
Cited
US4905240A
Cited
US4905241A
Cited
US4899339A
Cited
US4912346A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-17 | 1995-09-16 | 1996-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-17 | 1999-09-16 | 2000-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-17 | 2003-09-16 | 2004-03-17 | $7700.00 | Window Closed / Lapsed |