US 2011/0235295 A1 · Semiconductor Device

Abstract

A passive RF tag has an advantage of being compact and lightweight. However, the driving power is limited. In order to increase the maximum communication distance and the number of objects simultaneously identified, power consumption should be efficient and reduced. The semiconductor device includes an antenna circuit, a modulation circuit electrically connected to the antenna circuit, a filter circuit electrically connected to the modulation circuit, and a logic circuit electrically connected to the filter circuit, in which the modulation circuit includes a first resistor and a transistor, the filter circuit includes a capacitor, one terminal of the first resistor is electrically connected to one of a source and a drain of the transistor, the other terminal of the first resistor is electrically connected to the antenna circuit, and a gate of the transistor is electrically connected to one terminal of the capacitor and the logic circuit.

Claims18

Dependent claims

A semiconductor device comprising:

an antenna circuit;
a first resistor;
a transistor;
a capacitor;
a logic circuit;
a first constant-voltage power supply line;
and
a second constant-voltage power supply line,
wherein one terminal of the first resistor is electrically connected to one of a source and a drain of the transistor,
wherein the other terminal of the first resistor is electrically connected to the antenna circuit,
wherein the other one of the source and the drain of the transistor is electrically connected to the first constant-voltage power supply line,
wherein a gate of the transistor is electrically connected to one terminal of the capacitor and the logic circuit, and
wherein the other terminal of the capacitor is electrically connected to the second constant-voltage power supply line.

10 more elements

Dependencies are inferred from the claim text.

Semiconductor Device

Life of this patent

Semiconductor Device

Life of this patent

Abstract

Claims18