Semiconductor device and IC label, IC tag, and IC card provided with the semiconductor device
First Claim
Patent Images
1. A semiconductor device comprising:
- an antenna;
a rectifier circuit electrically connected to the antenna;
a charge accumulation circuit electrically connected to the rectifier circuit; and
a voltage circuit electrically connected to the charge accumulation circuit,wherein the charge accumulation circuit includes a plurality of switches and a plurality of capacitors, andwherein the plurality of capacitors are electrically connected in parallel through the switches.
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Abstract
A charge accumulation circuit having a structure in which a capacitor is divided into a plurality of pieces and the divided capacitors are connected in parallel through switches is provided. The charge accumulation circuit controls the switch provided between the capacitors and thus can dynamically vary electrostatic capacitance of the charge accumulation circuit which applies a voltage to a constant voltage circuit.
69 Citations
24 Claims
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1. A semiconductor device comprising:
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an antenna; a rectifier circuit electrically connected to the antenna; a charge accumulation circuit electrically connected to the rectifier circuit; and a voltage circuit electrically connected to the charge accumulation circuit, wherein the charge accumulation circuit includes a plurality of switches and a plurality of capacitors, and wherein the plurality of capacitors are electrically connected in parallel through the switches. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A semiconductor device comprising:
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an antenna; a rectifier circuit electrically connected to the antenna; a charge accumulation circuit electrically connected to the rectifier circuit; and a voltage circuit electrically connected to the charge accumulation circuit, wherein the charge accumulation circuit includes a plurality of switches and a plurality of capacitors, wherein each of the plurality capacitors has a first electrode and a second electrode, and wherein each of the first electrodes are connectable. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A semiconductor device comprising:
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an antenna; a rectifier circuit electrically connected to the antenna; a charge accumulation circuit electrically connected to the rectifier circuit; and a voltage circuit electrically connected to the charge accumulation circuit, wherein the charge accumulation circuit includes a plurality of switches, a plurality of capacitors, and a charge accumulation control circuit, wherein the plurality of capacitors are electrically connected in parallel through the switches, and wherein the charge accumulation control circuit controls on or off of the switches in accordance with a voltage to be applied to the voltage circuit. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A semiconductor device comprising:
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an antenna; a rectifier circuit electrically connected to the antenna; a charge accumulation circuit electrically connected to the rectifier circuit; and a voltage circuit electrically connected to the charge accumulation circuit, wherein the charge accumulation circuit includes a plurality of switches and a plurality of capacitors, and a charge accumulation control circuit, wherein each of the plurality capacitors has a first electrode and a second electrode, and wherein each of the first electrodes are connectable, and wherein the charge accumulation control circuit controls on or off of the switches in accordance with a voltage to be applied to the voltage circuit. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification