Tri-State Buffer There are two application area for the Tri-State Buffer Internal Tri-State- Buffer Logic need a Tri-State Buffer within Device External Tri-State Buffer Logic need a Tri-State Buffer at the/O pin What Altera can provide Altera will implement Internal Tri-State Buffer with MUX

ClkI and Clk2 are the clock which running at different frequency Copyright 1997 Altera Corporation

Asynchronous Circuit Design a Mainly use Combinational Logic to do the decoding Address decoder Fifo/Ram Read or Write pulse The output logic does not have any relationship with any clocking signal a Usually the Decoding Glitch can be monitored at the output signal

Part I Listening Comprehension(20 minutes) ection a Directions: In this section, you will hear 10 short conversations. At the end of each conversation, a question will be asked about what was said. B oth the conversation and the question will be spoken only once. After each quest ion there will be a pause. During the pause, you must read the four choices mar ed A), B), C), and D), and decide which is the best answer. Then mark the corres ponding letter on the Answer Sheet with a single line through the centre

Toxic metals Some metals are essential for the normal development and well-being of humans and other creatures They include Na, K, ca, Mg, cu, Cr, and Zn Other metals are toxic even when present in an organism at very low concentrations Examples: Antimony, Arsenic, Barium

Water vapor in the air The volume of Water vapor is variable, depending on temperature, precipitation, rate of evaporation and other factors at a particular location The percentage of water vapor ranges from 0.1- 5%. Generally it is 1-3%(the 3rd most abundant constituents in the air)

CHEMICAL ANALYSIS A SERIES OF MONOGRAPHS ON ANALYTICAL CHEMISTRY AND ITS APPLICATIONS Editor . D. WINEFORDNER Ⅴ OLUME162 A complete list of the titles in this series appears at the end of this volume

equipment, and to Dr. G. E. R. Deacon and the a residue on each chain every 3.4 A. in the z-direc- captain and officers of R. R.S. Discovery II for their tion. We have assumed an angle of 36between part in making the observations. at residues in the same chain, so th he 1Young, F. B., Gerrard, H., and Jevons,., Phil Mag., 40, 149 structu on each chain, that

Highlights of the Year 20 December 2002 2002 has been an exciting year for physicists. From the production of large numbers of anti-atoms at cern to the first measurement of the polarization of the cosmic background radiation, there

When an electric charge is supported at rest in a static gravitational field, its electric field is not supported with the charge, and it falls freely in the gravitationa field. Drawing the electric field lines continuously in time, we find that they always emerge from the charge, but the electric field is curved and there is a stress force between the freely falling (curved)field and the static charge. The charge radiates