Semiconductor device and wireless communication system using the same
First Claim
1. A semiconductor device comprising:
- an antenna transmitting and receiving a modulated carrier wave;
a band-pass filter connected to the antenna;
a power source circuit including a first terminal and a second terminal and generating a DC voltage between the first terminal and the second terminal by the modulated carrier wave inputted through the band-pass filter;
a circuit using the DC voltage as a power source voltage; and
a resistor connected to the first terminal and the second terminal,wherein the power source circuit comprises a rectifying circuit which rectifies the inputted modulated carrier wave through the band-pass filter and converts the inputted modulated carrier wave to a DC signal and a holding capacitor which smoothes the DC signal outputted from the rectifying circuit, andwherein the power source circuit outputs the DC signal smoothed by the holding capacitor as the DC voltage.
1 Assignment
0 Petitions
Accused Products
Abstract
Initialization of a semiconductor device can be efficiently performed, which transmits and receives data through wireless communication. The semiconductor device includes an antenna, a power source circuit, a circuit which uses a DC voltage generated by the power source circuit as a power source voltage, and a resistor. The antenna includes a pair of terminals and receives a wireless signal (a modulated carrier wave). The power source circuit includes a first terminal and a second terminal and generates a DC voltage between the first terminal and the second terminal by using a received wireless signal (the modulated carrier wave). The resistor is connected between the first terminal and the second terminal. In this manner, the semiconductor device and the wireless communication system can transmit and receive data accurately.
-
Citations
14 Claims
-
1. A semiconductor device comprising:
-
an antenna transmitting and receiving a modulated carrier wave; a band-pass filter connected to the antenna; a power source circuit including a first terminal and a second terminal and generating a DC voltage between the first terminal and the second terminal by the modulated carrier wave inputted through the band-pass filter; a circuit using the DC voltage as a power source voltage; and a resistor connected to the first terminal and the second terminal, wherein the power source circuit comprises a rectifying circuit which rectifies the inputted modulated carrier wave through the band-pass filter and converts the inputted modulated carrier wave to a DC signal and a holding capacitor which smoothes the DC signal outputted from the rectifying circuit, and wherein the power source circuit outputs the DC signal smoothed by the holding capacitor as the DC voltage. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification