Showing papers in "IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences in 1997"

Substrate Noise Reduction Using Active Guard Band Filters in Mixed-Signal Integrated Circuits (Special Section on Analog Circuit Techniques for System-on-Chip Integration)

Abstract: A substrate noise reduction technique using an \"active guard band filter\", is developed for analog and digital mixed-signal integrated circuits. A noise cancellation signal generated by operational amplifiers is actively input into a guard band to cancel substrate noise. In a 0.8 /spl mu/m CMOS test chip, substrate noise was experimentally suppressed to less than 1% of the original non-canceled noise for frequencies below 1 MHz by using this technique.

Efficient Routability Checking for Global Wires in Planar Layouts

Abstract: In VLSI and printed wiring board design, routing process usually consists of two stages: the global routing and the detailed routing. The routability checking is to decide whether the global wires can be transformed into the detailed ones or not. In this paper, we propose two graphs, the capacity checking graph and the initial flow graph, for the efficient routability checking.

A Secure and Practical Electronic Voting Scheme for Real World Environments (Special Section on Cryptography and Information Security)

Abstract: SUMMARY In this paper, we propose a practical and secure electronic voting scheme which meets the requirements of large scale general elections. This scheme involves voters, the administrator or so called the government and some scrutineers. In our scheme, a voter only has to communicate with the administrator three times and it ensures independence among voters without the need of any global computation. This scheme uses the threshold cryptosystem to guarantee the fairness among the candidate's campaign and to provide mechanism for achieving the function that any voter can make an open objection to the tally if his vote has not been published. This scheme preserves the privacy of a voter against the administrator, scrutineers, and other voters. Completeness, robustness, and veriiability of the voting process are ensured and hence no one can produce a false tally, corrupt or disrupt the election.