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US 3,935,564 AGranted
Charge storage and monitoring apparatus utilizing acoustic waves
AssigneeThe Board of Trustees of the Leland Stanford Jr. University
InventorsCalvin F. Quate, Thomas W. Grudkowski
Life of this patent
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Abstract
Charge storage and monitoring apparatus including a barrier electrode capable of supporting a charge adjacent a piezoelectric semiconductor to control the depletion layer and provide an output signal related to an acoustic wave in the semiconductor and the applied charge.
Claims21
Charge storage and monitoring apparatus utilizing acoustic waves which comprises:
- a piezoelectric semiconductor,
- a barrier electrode associated with said piezoelectric semiconductor and capable of supporting an electric charge,
- means for generating an acoustic wave of selected amplitude in said semiconductor to traverse the same adjacent said barrier electrode, and
- means for detecting the acoustic wave fields during such traversal to provide an output signal proportional to the electric charge on said barrier electrode.
1 more element
Charge storage and monitoring apparatus utilizing acoustic waves which comprises:
- a piezoelectric semiconductor,
- a barrier electrode associated with said piezoelectric semiconductor and capable of supporting a selected charge,
- means for generating an acoustic wave in said semiconductor to traverse the same adjacent the barrier electrode, and
- means for generating a signal in said electrode adjacent said semiconductor to provide an output signal proportional to the electric charge on said barrier electrode.
1 more element
Charge storage and monitoring apparatus utilizing acoustic waves which comprises:
- a piezoelectric semiconductor,
- a plurality of barrier electrodes arranged in regular rows and columns on said semiconductor,
- a source of charging voltage,
- switch means connected between said charging voltage source and said electrodes enabling application of a charge to each of said electrodes,
- means for generating an acoustic wave in said piezoelectric semiconductor to traverse the same adjacent said barrier electrodes, and
- means for generating signals uniquely associated with individual electrodes to provide an output signal related to the charging voltage thereon.
3 more elements
Dependencies are inferred from the claim text.