Elastic wave measurement apparatus and method
First Claim
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1. An elastic wave measurement apparatus configured to measure response characteristics from a plurality of elastic wave devices, the apparatus comprising:
- a high-frequency signal generator that generates a high-frequency signal that is input to an elastic wave device among the plurality of elastic wave devices based on an input destination;
a switch that sequentially switches the input destination of the high-frequency signal among the plurality of elastic wave devices, from the elastic wave device to which the high-frequency signal is being input to another elastic wave device among the plurality of elastic wave devices, before a detection time at which an output signal from the elastic wave device is detected;
a plurality of detectors each associated with a corresponding elastic wave device among the plurality of elastic wave devices, that each detect an output signal of the corresponding elastic wave device at a time that isafter a detection time of the corresponding elastic wave device,different for each of the corresponding elastic wave devices, andbased on a predetermined number of circuits for the corresponding elastic wave device;
an analog to digital converter that sequentially receives the detected output signals from the plurality of detectors at the different times; and
a measurement device that measures elastic waves excited at each of the elastic wave devices, based on an output from the analog to digital converter.
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Abstract
The elastic wave measurement apparatus, when a high-frequency burst signal is input to the first ball SAW device, an input destination of the high-frequency burst signal is switched in sequence to another one of the ball SAW devices before a detection time at which an output signal from the first ball SAW device is detected, and at and after the detection time, output signals of the response characteristics of those ball SAW devices from the first ball SAW device to the last ball SAW device are detected in sequence.
17 Citations
28 Claims
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1. An elastic wave measurement apparatus configured to measure response characteristics from a plurality of elastic wave devices, the apparatus comprising:
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a high-frequency signal generator that generates a high-frequency signal that is input to an elastic wave device among the plurality of elastic wave devices based on an input destination; a switch that sequentially switches the input destination of the high-frequency signal among the plurality of elastic wave devices, from the elastic wave device to which the high-frequency signal is being input to another elastic wave device among the plurality of elastic wave devices, before a detection time at which an output signal from the elastic wave device is detected; a plurality of detectors each associated with a corresponding elastic wave device among the plurality of elastic wave devices, that each detect an output signal of the corresponding elastic wave device at a time that is after a detection time of the corresponding elastic wave device, different for each of the corresponding elastic wave devices, and based on a predetermined number of circuits for the corresponding elastic wave device; an analog to digital converter that sequentially receives the detected output signals from the plurality of detectors at the different times; and a measurement device that measures elastic waves excited at each of the elastic wave devices, based on an output from the analog to digital converter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An elastic wave measurement method used for an elastic wave measurement apparatus comprising a plurality of elastic wave devices configured to output response characteristics of elastic waves in accordance with input of a high-frequency signal, a high-frequency signal generator configured to generate the high-frequency signal, and a switch configured to input the high-frequency signal generated by the high-frequency signal generator to each of the elastic wave devices by sequentially switching the input to each of the elastic wave devices, the method comprising:
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inputting the high-frequency signal to an elastic wave device among the plurality of elastic wave devices; switching the high-frequency signal to among the plurality of elastic wave devices, from the elastic wave device the high-frequency signal is being input, to another elastic wave device among the plurality of elastic wave devices, before a detection time at which an output signal from the first elastic wave device is detected; detecting an output signal of each of the plurality of elastic wave devices at a time that is after a respective detection time of each of the elastic wave devices, different for each of the elastic wave devices, and based on a predetermined number of circuits for each of the elastic wave devices; providing the detected output signal to an analog to digital converter that sequentially receives the detected output signals; measuring elastic waves excited at each of the elastic wave devices based on an output from the analog to digital converter. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification