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- Iddq_testing abstract "Iddq testing is a method for testing CMOS integrated circuits for the presence of manufacturing faults. It relies on measuring the supply current (Idd) in the quiescent state (when the circuit is not switching and inputs are held at static values). The current consumed in the state is commonly called Iddq for Idd (quiescent) and hence the name.Iddq testing uses the principle that in a correctly operating quiescent CMOS digital circuit, there is no static current path between the power supply and ground, except for a small amount of leakage. Many common semiconductor manufacturing faults will cause the current to increase by orders of magnitude, which can be easily detected. This has the advantage of checking the chip for many possible faults with one measurement. Another advantage is that it may catch faults that are not found by conventional stuck-at fault test vectors.Iddq testing is somewhat more complex than just measuring the supply current. If a line is shorted to Vdd, for example, it will still draw no extra current if the gate driving the signal is attempting to set it to '1'. However, a different input that attempts to set the signal to 0 will show a large increase in quiescent current, signalling a bad part. Typical Iddq tests may use 20 or so inputs. Note that Iddq test inputs require only controllability, and not observability. This is because the observability is through the shared power supply connection.".
- Iddq_testing wikiPageExternalLink iddq.pdf.
- Iddq_testing wikiPageExternalLink about_iddq.html.
- Iddq_testing wikiPageID "3954002".
- Iddq_testing wikiPageLength "3523".
- Iddq_testing wikiPageOutDegree "11".
- Iddq_testing wikiPageRevisionID "696119231".
- Iddq_testing wikiPageWikiLink CMOS.
- Iddq_testing wikiPageWikiLink Category:Integrated_circuits.
- Iddq_testing wikiPageWikiLink Controllability.
- Iddq_testing wikiPageWikiLink Integrated_circuit.
- Iddq_testing wikiPageWikiLink Logic_gate.
- Iddq_testing wikiPageWikiLink Moores_law.
- Iddq_testing wikiPageWikiLink Observability.
- Iddq_testing wikiPageWikiLink Power_gating.
- Iddq_testing wikiPageWikiLink Semiconductor_device_fabrication.
- Iddq_testing wikiPageWikiLink Stuck-at_fault.
- Iddq_testing wikiPageWikiLink Test_vector.
- Iddq_testing wikiPageWikiLinkText "IDDQ testing".
- Iddq_testing wikiPageWikiLinkText "IDDQ".
- Iddq_testing wikiPageWikiLinkText "Iddq testing".
- Iddq_testing wikiPageUsesTemplate Template:Cite_book.
- Iddq_testing wikiPageUsesTemplate Template:Cite_journal.
- Iddq_testing wikiPageUsesTemplate Template:Cite_web.
- Iddq_testing subject Category:Integrated_circuits.
- Iddq_testing hypernym Method.
- Iddq_testing type Software.
- Iddq_testing type Circuit.
- Iddq_testing type Redirect.
- Iddq_testing comment "Iddq testing is a method for testing CMOS integrated circuits for the presence of manufacturing faults. It relies on measuring the supply current (Idd) in the quiescent state (when the circuit is not switching and inputs are held at static values).".
- Iddq_testing label "Iddq testing".
- Iddq_testing sameAs Q5987815.
- Iddq_testing sameAs m.0b8dxb.
- Iddq_testing sameAs Q5987815.
- Iddq_testing wasDerivedFrom Iddq_testing?oldid=696119231.
- Iddq_testing isPrimaryTopicOf Iddq_testing.