Hiromichi Tsukada

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A significant increase in the speed of Si transistors has been achieved in recent years. Circuit forms that were previously applied to low frequency operation are now being realized in high frequency circuits. Therefore, low electrical power consumption and higher integration are becoming more advanced. We recognize that the essence of this drastic change(More)
A 2/spl times/4 optically-coupled economical crosspoint array for the telephone speech path with a high breakover voltage (>450 V), high dv/dt capability (>200 V/0.1 /spl mu/s), and high gate sensitivity (<5 mA) is described. This has been achieved by a new device structure with a double-gate MOSFET and RC discharge circuitry formed on a p-n-p-n(More)
Patients with dementia with Lewy bodies (DLB) frequently experience visual hallucination (VH), which has been aptly described as people seeing things that are not there. The distinctive character of VH in DLB necessitates a new theory of visual cognition. We have conducted a series of studies with the aim to understand the mechanism of this dysfunction of(More)
A number of memory models have been proposed. These all have the basic structure that excitatory neurons are reciprocally connected by recurrent connections together with the connections with inhibitory neurons, which yields associative memory (i.e., pattern completion) and successive retrieval of memory. In most of the models, a simple mathematical model(More)
A number of memory models have been proposed. These all have the basic structure that excitatory neurons are reciprocally connected by recurrent connections together with the connections with inhibitory neurons, which yields associative memory (i.e., pattern completion) and successive retrieval of memory. In most of the models, a simple mathematical model(More)
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