Multiplexer for a piezo ceramic identification device
First Claim
1. A multiplexer, comprising:
- a plurality of first conductors coupled to first ends of piezo ceramic elements in corresponding rows;
a plurality of first switches each of which is coupled to a respective one of the first conductors;
a plurality of second conductors coupled to second ends of piezo ceramic elements in corresponding columns; and
a plurality of second switches each of which is coupled to a respective one of the second conductors,wherein the first conductors are approximately orthogonal to the second conductors, andwherein the first switches are controlled to couple a signal output from an output port of the signal generator to a particular piezo ceramic element of the piezo ceramic elements, andwherein the second switches are controlled to couple a signal associated with the particular piezo ceramic element to an input port of the processor.
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Accused Products
Abstract
Provided is a multiplexer for a biometric apparatus. The multiplexer includes a plurality of first conductors coupled to the first ends of piezo ceramic elements in corresponding rows and a plurality of first switches each of which is coupled to a respective one of the first conductors and a plurality of second conductors coupled to the second ends of piezo ceramic elements in corresponding columns. The multiplexer also includes a plurality of second switches each of which is coupled to a respective one of the second conductors. The first conductors are approximately orthogonal to the second conductors, and the first switches are controlled to couple a signal output from an output port of the signal generator to a particular piezo ceramic element of the at least twenty five thousand piezo ceramic elements. The second switches are controlled to couple a signal associated with the particular piezo ceramic element of the at least twenty five thousand piezo ceramic elements to an input port of the processor.
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Citations
20 Claims
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1. A multiplexer, comprising:
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a plurality of first conductors coupled to first ends of piezo ceramic elements in corresponding rows; a plurality of first switches each of which is coupled to a respective one of the first conductors; a plurality of second conductors coupled to second ends of piezo ceramic elements in corresponding columns; and a plurality of second switches each of which is coupled to a respective one of the second conductors, wherein the first conductors are approximately orthogonal to the second conductors, and wherein the first switches are controlled to couple a signal output from an output port of the signal generator to a particular piezo ceramic element of the piezo ceramic elements, and wherein the second switches are controlled to couple a signal associated with the particular piezo ceramic element to an input port of the processor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A multiplexer comprising:
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a plurality of first conductors each coupled to a first end of Y of piezo ceramic elements; a plurality of second conductors each coupled to a second end of X of the piezo ceramic elements; a plurality of first switches coupled to the first conductors; a plurality of second switches coupled to the second conductors; a first shift register coupled to the first switches and configured to control the position thereof; a second shift register coupled to the second switches and configured to control the position thereof; and a controller coupled to the first and second shift registers and configured to control the first and second shift registers. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification