Near field communication device
First Claim
Patent Images
1. A near field communication device comprising:
- an antenna;
a transmission amplifier;
a matching circuit connected between the antenna and the transmission amplifier; and
a transmitter configured to transmit a transmit clock to the matching circuit through the transmission amplifier, to extract an extraction clock from a waveform formed in the matching circuit, to determine information relating to a phase difference between the transmit clock and the extraction clock, and to control transmission of an information signal through the antenna, the transmission amplifier, and the matching circuit based on the determined information relating to the phase difference,wherein the waveform formed in the matching circuit is formed in response to transmission of the transmit clock to the matching circuit.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is a near field communication device which includes an antenna, a transmission amplifier, a matching circuit connected between the antenna and the transmission amplifier, and a transmitter. The transmitter transmits a transmit clock to the matching circuit through the transmission amplifier, extracts an extraction clock from a waveform formed in the matching circuit, stores a phase difference between the transmit clock and the extraction clock, and controls transmission of an information signal through the antenna, the transmission amplifier, and the matching circuit based on the phase difference.
15 Citations
20 Claims
-
1. A near field communication device comprising:
-
an antenna; a transmission amplifier; a matching circuit connected between the antenna and the transmission amplifier; and a transmitter configured to transmit a transmit clock to the matching circuit through the transmission amplifier, to extract an extraction clock from a waveform formed in the matching circuit, to determine information relating to a phase difference between the transmit clock and the extraction clock, and to control transmission of an information signal through the antenna, the transmission amplifier, and the matching circuit based on the determined information relating to the phase difference, wherein the waveform formed in the matching circuit is formed in response to transmission of the transmit clock to the matching circuit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 13, 14)
-
-
11. A near field communication device comprising:
-
an antenna; a transmission amplifier; a matching circuit connected between the antenna and the transmission amplifier; and a transmitter configured to extract a first extraction clock from a first waveform formed in the matching circuit, transmit a transmit clock, by selecting the first extraction clock as the transmit clock, to the matching circuit through the transmission amplifier, to extract a second extraction clock from a second waveform formed in the matching circuit while transmitting the transmit clock through the matching circuit, and to detect a phase difference between the transmit clock and the second extraction clock. - View Dependent Claims (12, 15, 16)
-
-
17. A near field communication device comprising:
-
an antenna; a transmission amplifier; a matching circuit connected between the antenna and the transmission amplifier; and a transmitter that operates in one of a phase measurement mode and a transmission mode and that is configured to transmit a transmit clock to the matching circuit through the transmission amplifier, the transmitter comprising; a multiplexer that is configured to select a first clock as the transmit clock in the phase measurement mode so as to be transmitted to the transmission amplifier to detect a phase difference between the transmit clock and a first extraction clock extracted from the matching circuit while transmitting the transmit clock through the matching circuit and to select a second clock as the transmit clock in the transmission mode so as to be transmitted to the transmission amplifier, wherein the second clock is based on the phase difference. - View Dependent Claims (18, 19, 20)
-
Specification