Computer-aided design and analysis of circuits and semiconductor – Nanotechnology related integrated circuit design
Reexamination Certificate
2006-10-10
2006-10-10
Dinh, Paul (Department: 2825)
Computer-aided design and analysis of circuits and semiconductor
Nanotechnology related integrated circuit design
C716S030000, C716S030000, C716S030000, C716S030000
Reexamination Certificate
active
07120893
ABSTRACT:
A printed-circuit board characteristic evaluation system is basically configured by an input device, a data processing device, a storage device and an output device. Herein, the input device inputs layout information representing an overall layout of a printed-circuit board installing at least one active component, from which layout information data regarding a power supply circuit is extracted and is stored in the storage device. The layout information data is converted to electric circuit information representing an equivalent circuit model with respect to a selected side of the printed-circuit board. Then, calculations are performed based on the layout information data to produce impedance characteristics with respect to the power supply circuit. A decision is made as to whether resonance is caused to occur in the power supply circuit on the basis of results of comparison of the impedance characteristics. The output device outputs the impedance characteristics as well as resonance information. If it is determined that resonance is caused to occur in the power supply circuit, the system changes the layout information, from which new layout information data is being extracted. In addition, a resonance suppression technique (e.g., installation of a decoupling capacitor) is applied to a certain point of the power supply circuit or a prescribed power terminal connecting position. Thus, the system is capable of performing evaluation as to whether printed-circuit boards are well designed to suppress variations of power voltages while inhibiting radiation of unwanted electromagnetic waves from occurring due to resonance of power supply circuits.
REFERENCES:
patent: 5341274 (1994-08-01), Nakatani et al.
patent: 6215373 (2001-04-01), Novak et al.
patent: 7-152824 (1995-06-01), None
patent: 7-239865 (1995-09-01), None
patent: 7-120368 (1995-12-01), None
patent: 9-266370 (1997-10-01), None
patent: 9-274623 (1997-10-01), None
patent: 9-325976 (1997-12-01), None
patent: 10-97560 (1998-04-01), None
patent: 10-105583 (1998-04-01), None
patent: 10-269277 (1998-10-01), None
patent: 10-301976 (1998-11-01), None
patent: 11-15870 (1999-01-01), None
patent: 11-94889 (1999-04-01), None
patent: 11-120214 (1999-04-01), None
patent: 2000-22287 (2000-01-01), None
patent: 2000-105777 (2000-04-01), None
patent: 2000-123062 (2000-04-01), None
T. Harada, H. Sasaki & Y. Kami, “Radiated Emission Arising from Power Distribution in Multilayer Printed Circuit Boards”,International Symposium on Electromagnetic Compatibility, IEEE, Aug. 1997, p. 518-522.
T. Harada, H. Sasaki & Y. Kami, “Investigation on Power Distribution Plane Resonance in Multilayer Printed Circuit Boards Using a Transmission-line Model”,International Symposium on Electromagnetic Compatibility, IEEE, May 1999, p. 24-24.
T. Harada, H. Sasaki & Y. Kami, “Controlling Power-Distribution-Plane Resonance in Multilayer Printed Circuit Boards”,IEICE Transactions on Communications, vol. E83-B, No. 3, Mar. 2000, p. 577-585.
T. Harada, K. Asao, H. Sasaki & Y. Kami, “Two-Dimensional Analysis for Power Distribution Plane in Multilayer Printed Circuit Boards”,IEICE Technical Report, vol. 99, No. 102, Dec. 1999, p. 7-14.
Nikkei Electronics, 1998, No. 714, p. 151-158.
T. Harada, H. Sasaki & Y. Kami, “Analysis of Power Distribution Resonance in Multilayer Printed Circuit Boards Using the Transmission Line Theory”,Thesis of Microelectronics Symposium, Electronics Mounting Conference, Dec. 1998, p. 105-108.
M. Montrose, “EMC Design for Printed Circuit”, Ohm Corp., 1997, vol. 1, No. 1, p. 65-67.
T. Harada, H. Sasaki, K. Erikawa & Y. Kami, “Resonant Characteristics of Power Distribution Planes in Multilayer Printed Circuit Boards”,IEICE Technical Report, vol. 98, No. 285, p. 47-52.
W. Banzhaf, “Simulating Lossy Transmission Lines with PSpice”, on pp. 25-27 of RF Design, Jan. 1993.
Paper of Proceedings of the IEEE on pp. 1611-1612, vol. 65, No. 11, published on Nov. 1977.
R. Pucel et al., “Losses in Microstrip”, IEEE Transactions on Microwave Theory and Techniques, vol. MTT-16, No. 6, Jun. 1968.
Harada Takashi
Sasaki Hideki
Dinh Paul
NEC Corporation
Whitham Curtis Christofferson & Cook PC
LandOfFree
System and method for evaluation of electric characteristics... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for evaluation of electric characteristics..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for evaluation of electric characteristics... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3701589