US 8,261,999 B2 · Semiconductor device

Abstract

A semiconductor device such as an RFID, which can easily generate a given stable potential, is provided. Circuits included in a semiconductor device are categorized depending on whether a given stable power source potential is necessary. A power source potential generated from a wireless signal received by an antenna with the use of the antenna and a rectifier circuit is supplied to a circuit which needs a given stable power source potential through a regulator. On the other hand, a power source potential generated by the rectifier circuit is supplied to a circuit other than the circuit which needs the arbitrary power source potential. Thus, a semiconductor device including a regulator circuit easily designed with a smaller layout can be provided, and the semiconductor device can easily generate a given stable power source potential.

Claims20

Dependent claims

A semiconductor device comprising:

an antenna;
a rectifier circuit electrically connected to the antenna;
a regulator circuit electrically connected to the rectifier circuit and a first power source line connected to an output terminal of the regulator circuit;
a first circuit including a clock generating circuit, the first circuit being electrically connected to the first power source line;
and
a demodulation circuit and a modulation circuit, at least one of which being directly connected to a second power source line connected to an output of the rectifier circuit.

3 more elements

A semiconductor device comprising:

an antenna;
a rectifier circuit electrically connected to the antenna;
a first regulator circuit electrically connected to the rectifier circuit, and a first power source line connected to an output terminal of the first regulator circuit;
a second regulator circuit electrically connected to the rectifier circuit, and a second power source line connected to an output terminal of the second regulator circuit;
a first circuit including a clock generating circuit, the first circuit being electrically connected to the first power source line;
and
a demodulation circuit and a modulation circuit, at least one of which being directly connected to the second power source line.

4 more elements

A semiconductor device comprising:

an antenna;
a rectifier circuit electrically connected to the antenna;
a regulator circuit electrically connected to the rectifier circuit, and a first power source line connected to an output terminal of the regulator circuit;
a voltage limiter circuit electrically connected to the rectifier circuit, and a second power source line connected to an output terminal of the voltage limiter circuit;
a first circuit including a clock generating circuit, the first circuit being electrically connected to the first power source line;
and
a demodulation circuit and a modulation circuit, at least one of which being directly connected to the second power source line.

4 more elements

Dependencies are inferred from the claim text.

Semiconductor device

Life of this patent

Semiconductor device

Life of this patent

Abstract

Claims20