Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1990-03-05
1991-07-23
Carroll, J.
Electrical generator or motor structure
Dynamoelectric
Rotary
357 65, 310313R, 333154, 333165, H01L 2984, H01L 2996, H01L 2348, H01L 2940
Patent
active
050347934
ABSTRACT:
An acoustic charge transport device (ACT) alters the intersection of an associated surface acoustic wave (SAW) electric potential with the static depletion potential and the input contact potential to correct the timing variations inherent in conventional ACT devices. The ACT device incorporates a pair of correcting electrodes secured to the ACT channel on either side of an input electrode. The electrodes vary the depth of the electric potential of the SAW which ensures sampling of the input signals at consistent times.
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W. J. Tanski et al., "Heterojunction Acoustic Charge Transport Devices on GaAs", Applied Physics Letters, vol. 52 (Jan. 1988) pp. 18-20.
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R. W. Miller et al., "an Acoustic Charge Transport Digitally Programmable Transversal Filter", IEEE Journal of Solid-State Circuits, vol. 24 (Dec. 1989) pp. 1675-1682.
G. A. Peterson et al., "Charge Confinement in Heterojunction Acoustic Charge Transport Devices", Applied Physics Letters, vol. 55 (Sep. 1989) pp. 1330-2.
B. C. Beggs et al., "Optical Charge Injection into Gallium Arsenide Acoustic Charge Transport Device", Journal of Applied Physics, vol. 63 (Apr. 1988), pp. 2425-2430.
R. N. Sacks et al., "Acoustic Charge Transport in an (Al,Ga)As/GaAs Heterojunction Structure Grown by Molecular-Beam Epitaxy", Journal of Vacuum Science & Technology vol. B6 (2) (Mar./Apr. 1988), pp. 685-7.
Ch Frederick Y.
Fliegel Frederick M.
Malocha Donald C.
Bogacz Frank J.
Carroll J.
Motorola Inc.
Powell Jordan C.
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