Computer-aided design and analysis of circuits and semiconductor – Nanotechnology related integrated circuit design
Reexamination Certificate
2008-04-01
2008-04-01
Chiang, Jack (Department: 2825)
Computer-aided design and analysis of circuits and semiconductor
Nanotechnology related integrated circuit design
C716S030000, C716S030000
Reexamination Certificate
active
07353483
ABSTRACT:
An element placement check system for checking element placement on a printed wiring board having wiring by which a power supply terminal of an integrated circuit and a power supply decoupling element for the power supply terminal are connected on a mounting surface on which the integrated circuit is mounted, wherein the wiring is connected to a power supply plane for providing a direct current power supply to the power supply terminal through a power supply via hole, including: element distance detecting means detecting a first wire length between the power supply decoupling element and the power supply terminal; power supply via hole distance detecting means detecting a second wire length between the power supply via hole and the power supply terminal; and determination means determining a positional relationship of the power supply decoupling element and the power supply via hole to the power supply terminal based on the first and second wire lengths, thereby providing a check system and a printed wiring board design system capable of checking a connection sequence of a power supply decoupling element such as a bypass capacitor and the power supply via hole connected to the power supply plane feeding a direct current power supply to the power supply terminal as viewed from the power supply terminal of an integrated circuit.
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Bruce Carter, “How (Not) to Decouple High-Speed Operational Amplifiers” [Online] Sep. 2001, pp. 1-4, retrieved from the Internet: URL:http://focus.ti.com/lit/an/sloa069/sloa069.pdf> [retrieved on Sep. 14, 2006].
Leroy Davis, “Leroys engineering Web Site; Design; Capacitors” [Online] Oct. 4, 2003, Retrieved from the Internet: URL:http://web.archive.org/web/20031004115319/http://www.interfacebus.com/Design—Capacitors.html> [retrieved on Sep. 14, 2006].
Fusayasu Hirotsugu
Hamada Seiji
Irikiin Miyoko
Mimura Shoichi
Chiang Jack
Dimyan Magid Y.
Matsushita Electric - Industrial Co., Ltd.
Wenderoth , Lind & Ponack, L.L.P.
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