A high speed 16 kbit ECL RAM
A 16384 /spl times/ 1 bit ECL RAM (emitter coupled logic random access memory) with an access time of 15 ns and a power dissipation of 700 mW has been developed. The high packing density and performance were achieved by using a p-n-p load cell, a novel ECL circuit, and U-groove isolation. The test results proved that a p-n-p load cell is very effective in producing a fast high-density bipolar RAM having a capacity of over 64 Kbits.
A sub 100ns 256K DRAM
A 90ns access time 256K×1 RAM with a 15ns 4b nibble mode will be described. Device uses shared sense amplifiers, booted word lines, active restore and vertical process scaling to achieve improved alpha immunity.
LYAPUNOV-BASED TRANSFER BETWEEN ELLIPTIC KEPLERIAN ORBITS
We present a study of the transfer of satellites between elliptic Keplerian orbits using Lyapunov stability theory specific to this problem. The construction of Lyapunov functions is based on the fact that a non-degenerate Keplerian orbit is uniquely described by its angular momentum and Laplace (- Runge-Lenz) vectors. We suggest a Lyapunov function, which gives a feedback controller such that the target elliptic orbit becomes a locally asymptotically stable periodic orbit in the closed-loop dynamics. We show how to perform a global transfer between two arbitrary elliptic orbits based on the local transfer result. Finally, a second Lyapunov function is presented that works only for circular target orbits.