Semiconductor device, method for manufacturing semiconductor device, tire, and moving object
First Claim
Patent Images
1. A tire comprising a semiconductor device, the semiconductor device comprising:
- a first circuit portion comprising an analog-to-digital converter circuit and a sample-and-hold circuit;
an antenna electrically connected to the first circuit portion; and
a sensor element electrically connected to the first circuit portion,wherein the sensor element is configured to measure an air pressure of the tire,wherein the sample-and-hold circuit comprises a buffer circuit and a second circuit portion,wherein the second circuit portion comprises a transistor and a capacitor,wherein an analog potential is supplied to one of a source and a drain of the transistor through the buffer circuit,wherein charge corresponding to the analog potential is held at the other of the source and the drain of the transistor and in the capacitor by turning off the transistor, andwherein supply of a power supply voltage to the buffer circuit is stopped when the charge corresponding to the analog potential is held.
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Abstract
To provide a circuit with low power consumption, a semiconductor device with low power consumption, a highly reliable semiconductor device, a tire whose performance is controlled, a moving object whose performance is controlled, or a moving object with a high degree of safety. A tire provided with a semiconductor device is provided. The semiconductor device includes a circuit portion, an antenna, and a sensor element. The circuit portion includes a transistor. The transistor includes an oxide semiconductor. The sensor element is configured to measure the air pressure of the tire.
119 Citations
16 Claims
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1. A tire comprising a semiconductor device, the semiconductor device comprising:
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a first circuit portion comprising an analog-to-digital converter circuit and a sample-and-hold circuit; an antenna electrically connected to the first circuit portion; and a sensor element electrically connected to the first circuit portion, wherein the sensor element is configured to measure an air pressure of the tire, wherein the sample-and-hold circuit comprises a buffer circuit and a second circuit portion, wherein the second circuit portion comprises a transistor and a capacitor, wherein an analog potential is supplied to one of a source and a drain of the transistor through the buffer circuit, wherein charge corresponding to the analog potential is held at the other of the source and the drain of the transistor and in the capacitor by turning off the transistor, and wherein supply of a power supply voltage to the buffer circuit is stopped when the charge corresponding to the analog potential is held. - View Dependent Claims (2, 3, 4)
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5. A semiconductor device comprising:
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a first circuit portion comprising an analog-to-digital converter circuit and a plurality of sample-and-hold circuits; an antenna electrically connected to the first circuit portion; and a plurality of sensor elements electrically connected to the first circuit portion, wherein each of the sample-and-hold circuits comprises a buffer circuit and a second circuit portion, wherein the second circuit portion comprises a transistor and a capacitor, wherein an analog potential is supplied to one of a source and a drain of the transistor through the buffer circuit, wherein, in the second circuit portion, charge corresponding to the analog potential is held at the other of the source and the drain of the transistor and in the capacitor by turning off the transistor, wherein supply of a power supply voltage to the buffer circuit is stopped when the charge corresponding to the analog potential is held, and wherein the plurality of sensor elements are configured to measure two or more of a pressure, a temperature, strain, and acceleration. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A method for driving a semiconductor device, the semiconductor device comprising a wireless circuit comprising a circuit portion, an antenna, and m sensor elements, wherein the circuit portion comprises an analog-to-digital converter circuit and n sample-and-hold circuits, and wherein an x-th sensor element is connected to a corresponding sample-and-hold circuit of the n sample-and-hold circuits, the method comprising:
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a first step in which analog potentials output from the m sensor elements are each input to a corresponding sample-and-hold circuit of the n sample-and-hold circuits, a second step in which the analog potentials input to the n sample-and-hold circuits are held, and a third step in which the analog potentials output from first to n-th sample-and-hold circuits are sequentially input to the analog-to-digital converter circuit, wherein m is an integer, wherein n is an integer, and wherein x is an integer of greater than or equal to 1 and less than or equal to m. - View Dependent Claims (13, 14, 15, 16)
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Specification