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Aug. Dec. Dec. Dec. Aug. Sept. June My Very-large-scale integrated circuit design University research, industry support June 1981 Verification, design and artwork, VLSI June 1981 Verification, design and artwork, VLSI Adams, Charles A. Ainsworth, Gerald L. Apte, Ravi M. Aue, Peter Ha ley, Pau W. Baker, Thomas H. Baron, Wayne D. Bartlett, Debra S. Black. Kyle M. Borowski, Donald T. Bracken, Diane F. Bray, Robert C, Brooksby, Merrill W, Federman, Nancy C. Flower, Terry L. Frankel, Andrea K,...
Hewlettpackard Journal
Technical In formation from the Laboratories of Hewlett-Packard Company x 4 DECEMBER 1981 Volume 32 Number 12 Surface-Acoustic-Wave Delay Lines and Transversal Filters, by Waguih S. Ishak. H. Edward Karrer, and William R. Shreve Generating and detecting minute ripples on the surface of a solid provides a way fo delay and or filter electronic signals in a small space. Surface-Acoustic-Wave Resonators, by Peter S. Cross and Scott S. Elliott By reflecting acoustic waves back and forth on the...
SurfaceAcousticWave Delay Lines and Transversal Filters
Novel, simple and compact electronic devices can be realized by exciting and detecting acoustic waves electrically on the surface of a solid. Technological advances in low-loss delay lines and bandpass filters are discussed. by Waguih S. fshak, H. Edward Karrer and William R. Shreve SURFACE WAVES are familiar to anyone who has thrown a pebble into a pond and watched the concentric ripples emanate from the splash. These waves carry energy outward from 1 lie splash at a velocity dependent on the...
SurfaceAcousticWave Resonators
by Peter S. Cross and Scott S. Elliott A SURFACE-ACOUSTIC-WAVE SAW delay line see article on page 3 can be converted into a higb-Q resonator filter by enclosing the interdigital transducers IDTs with two periodic arrays of grooves as shown in Fig. 1. Each array acts as an efficient reflector of surface waves over a band of frequencies determined by the groove period and depth. When two such arrays are placed near each other, a Fabry-Perot laser-type resonator is formed.1 Because of its complex...
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Fig. 3. Equivalent circuit for an interdigital surtace-acoustic-wave transducer IDT . phase with frequency. It is oven possible to distort the filter's phase response intentionally to compensate for phase shifts in matching networks or other circuit components. The key element in SAW filter design is the interdigital transducer it couples the electrical signal to the acoustic waveform and thereby determines the filter impedance and frequency response. The transducer nan be modeled by the...
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Fig. 2. Proximity effect for lines exposed mill a single scan ot a 0,5- tun-diameter beam into a 0 4-run-thick layer ol PMMA resist on a silicon substrate The pixel width is 0.5 pm Shown are modeled profiles of the developed resist for a the central region of live 0.5- inn-wide lines with 0 5- run-wide spacing and b an isolated 0.5- fim-wide line c shows a and b superimposed for comparison d SEM photograph of experimental result for live equal lines and spaces in PMMA 20-keV electron beam. Fig....
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Rectifier, Schottky Reflected-light sensor Real-time clock, nonvolatile Reliability testing Resonators, SAW Rhythm function Routings and work centers SAW fabrication .Scattering, electron, in resist SC cut crystal oscillator Schematic input. VLSI Schottky TTL, pulse generator for Self-test capability Sensors, SAW Servnmechanism, drafting ploller Servomechanism IC Shearing wedge Signal generator 0.01-1280 MHz Simulation of VLSI circuits Simulation of electron beam exposures Sine-wave power...