Semiconductor integrated circuit, radio frequency identification transponder, and non-cotact IC card
First Claim
1. A semiconductor integrated circuit comprising:
- a rectifier circuit for converting an alternating current into a direct-current voltage and outputting the voltage as a power supply voltage;
a memory array having a plurality of ferroelectric memory cells; and
a ferroelectric holding circuit having a volatile holding circuit and a plurality of ferroelectric capacitors.
4 Assignments
0 Petitions
Accused Products
Abstract
A rectifier circuit converts an alternating current into a direct-current voltage and outputs it as a power supply voltage. A ferroelectric holding circuit has a volatile holding circuit and a plurality of ferroelectric capacitors. Data held in the ferroelectric holding circuit has a read margin greater than that of data held in ferroelectric memory cells in a memory array. The ferroelectric holding circuit thus operates with reliability even if power that the semiconductor integrated circuit receives is low. Consequently, since the ferroelectric holding circuit is formed on the semiconductor integrated circuit to be implemented on an RFID transponder or a non-contact IC card, the communication range between the RFID transponder or non-contact IC card and a reader/writer can be extended.
156 Citations
24 Claims
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1. A semiconductor integrated circuit comprising:
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a rectifier circuit for converting an alternating current into a direct-current voltage and outputting the voltage as a power supply voltage;
a memory array having a plurality of ferroelectric memory cells; and
a ferroelectric holding circuit having a volatile holding circuit and a plurality of ferroelectric capacitors. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A radio frequency identification transponder comprising an antenna coil for generating an alternating current in accordance with a magnetic field, and a semiconductor integrated circuit to be supplied with said alternating current, wherein said semiconductor integrated circuit includes:
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a rectifier circuit for converting said alternating current into a direct-current voltage and outputting the voltage as a power supply voltage;
a memory array having a plurality of ferroelectric memory cells; and
a ferroelectric holding circuit having a volatile holding circuit and a plurality of ferroelectric capacitors. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A non-contact IC card comprising an antenna coil for generating an alternating current in accordance with a magnetic field, and a semiconductor integrated circuit to be supplied with said alternating current, wherein said semiconductor integrated circuit includes:
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a rectifier circuit for converting said alternating current into a direct-current voltage and outputting the voltage as a power supply voltage;
a memory array having a plurality of ferroelectric memory cells; and
a ferroelectric holding circuit having a volatile holding circuit and a plurality of ferroelectric capacitors. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24)
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Specification