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Gangliosides, sialic acid-containing glycosphingolipids, are related to various synaptic functions in the rat brain. Previously, we investigated the behavioral effects of the ganglioside GQ1b on learning and memory using the Y-maze and Morris water maze test. GQ1b-treated rats showed highly increased memory performance on the Y-maze and the Morris water maze test. In this study, we determined the...
RZ current switches are added to a current steering DAC for high-frequency wideband applications to achieve 800MHz bandwidth at 1/sup st/ and 2/sup nd/ Nyquist band without the need for a reverse sinc equalization filter. Implemented in a GaAs HBT process with 4.5 /spl mu/m/sup 2/ minimum emitter area, the DAC dissipates 1.2W at -5V with a 1.6GHz clock and 0dBm typical output power.
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