USPatentGranted
B2

System comprising a state-monitoring memory element

Granted 22 Nov 2011 · 10 office actions

Current assignee: Morgan Stanley Senior Funding, Inc. · originally Infineon Technologies AG

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Inventors: Timothy Williams, Michael Sheets · Examiner: R Lance Reidlinger

Life of the patent

20 dated events
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Abstract

Embodiments of the invention relate to a state-monitoring memory element. The state-monitoring memory element may have a reduced ability to retain a logic state than other regular memory elements on an IC. Thus, if the state-monitoring memory elements fails or loses state during testing, it may be a good indicator that the IC\'s state retention may be in jeopardy, possibly requiring the IC to be reset. The state-monitoring memory element may be implemented by degrading an input voltage supply to the state-monitoring memory element across a diode and/or a transistor. One or more current sources may be used to stress the state-monitoring memory element. A logic analyzer may be used to analyze the integrity of the state-monitoring memory element and trigger appropriate actions in the IC, e.g., reset, halt, remove power, interrupt, responsive to detecting a failure in the state-monitoring memory element. Multiple state-monitoring memory elements may be distributed in different locations on the IC for better coverage.

Claims

16 · 3 independent · depth 3
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16 granted claims

Classifications

4 codes
IPC · International Patent Classification
Section G — Physics
  • G11C5/14
USPC · US Patent Classification
365/228365/154365/226

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File wrapper

⤢ drag to zoomJul 2007Jan 2008Jul 2008Jan 2009Jul 2009Jan 2010Jul 2010Jan 2011Jul 2011Jan 2012USPTOApplicantNon-final rejectionFinal rejectionNon-final rejectionNon-final rejectionFinal rejectionRequest for continued examinationRequest for continued examination
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Pendency
4.2 y
1,525 days filing → grant
Office actions
5
non-final + final
Responses
4
3 RCE
Examiner
R Lance Reidlinger
art unit —
Citations: 69 back · 0 forward

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Term & fees

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Priority chain

2 priority documents
Priority
17 Apr 2007
earliest claimed
›Priority documents — 2
TypeDocumentDate
provisionalUS 6091239917 Apr 2007
related publicationUS 20080259702 A123 Oct 2008

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Citations

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