NEAR FIELD WIRELESS TRANSMISSION/RECEPTION METHOD AND APPARATUS

• US 20140086345A1
• Filed: 08/16/2013
• Published: 03/27/2014
• Est. Priority Date: 09/24/2012
• Status: Active Grant

• Current Assignee: Korea Advanced Institute of Science and Technology, Samsung Electronics Co. Ltd.
• Original Assignee: Korea Advanced Institute of Science and Technology, Samsung Electronics Co. Ltd.
• Inventors: Yoo, Hoi-Jun, Kwak, Kyu-Sub, HUH, Jae-Young, Kim, Dong-Churl, Lee, Jea-Hyuck, Cho, Hyun-Woo, Roh, Tae-Hwan, Ha, Un-Soo
• Granted Patent: US 9,413,432 B2
• Time in Patent Office: Days
• US Class Current: 375/256
• CPC Class Codes: H04B 5/0031 for data transfer
• CPC Class Codes: H04B 5/0075 using inductive coupling transformers or inductances adapted for inductive coupling H01F38/14
• CPC Class Codes: H04B 5/02 using transceiver
• CPC Class Codes: H04B 5/24 Inductive coupling
• CPC Class Codes: H04B 5/48 Transceivers
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A near field wireless communication apparatus using a magnetic coupling to transmit data or clock information with low power and high efficiency is provided. Thus, when data to be transmitted is “1,” the near field wireless communication apparatus modulates the data into a pulse signal and transmits the pulse signal, and when the data is “0,” the near field wireless communication apparatus does not generate a signal at all.

Claims

1. A data transmitting/receiving method of a near field wireless communication apparatus using magnetic coupling, the method comprising:

generating, by a pulse generator, a first positive pulse signal corresponding to transmission digital data by outputting a positive pulse when the transmission digital data is “

1” and

not outputting a pulse when the transmission digital data is “

0”

; and

driving a data transmission coupler only for a period in which the first positive pulse signal is the positive pulse, thereby transmitting the transmission digital data.

2. The method of claim 1, further comprising:

generating a positive/negative pulse signal in which a positive pulse and a negative pulse intersect, in response to signal reception in a data reception coupler;

comparing a reference value with the positive/negative pulse signal to change the positive/negative pulse signal to a second positive pulse signal; and

demodulating the second positive pulse signal to reception digital data.

3. The method of claim 2, wherein demodulating the second positive pulse signal to the reception digital data comprises:

toggling, by a first delay flip-flop, the second positive pulse signal to generate a toggling signal;

sampling, by a second delay flip-flop, the toggling signal to generate a sampling signal;

delaying, by a third delay flip-flop, the sampling signal to generate a delay signal; and

conducting an XOR operation for the sampling signal and the delay signal to recover the reception digital data.

4. The method of claim 2, wherein changing the positive/negative pulse signal to the second positive pulse signal comprises, when the pulse value of the positive/negative pulse signal is larger than the reference value, a comparator outputs the positive pulse, and when the pulse value of positive/negative pulse signal is smaller than the reference value, the comparator outputs “

0”

, so that the second positive pulse signal is output.

5. The method of claim 1, further comprising:

transmitting a clock signal used when generating the transmission digital data through a clock transmission coupler.

6. The method of claim 1, further comprising:

amplifying a clock signal received through a clock reception coupler; and

generating a clock signal harmonized to the amplified clock signal to be used when demodulating reception data.

7. The method of claim 6, further comprising:

injection-locking the amplified clock signal to a ring oscillator to generate the clock signal harmonized to the amplified clock signal.

8. A near field wireless communication apparatus using magnetic coupling, the apparatus comprising:

a data transmission coupler;

a pulse generator configured to output a positive pulse when transmission digital data is “

1” and

to not output a pulse when the transmission digital data is “

0,”

thereby generating a first positive pulse signal corresponding to the transmission digital data; and

a driver configured to drive a data transmission coupler only for a period in which the first positive pulse signal is the positive pulse, thereby transmitting the transmission digital data.

9. The apparatus of claim 8, further comprising:

a data reception coupler configured to output a positive/negative pulse signal generated in response to signal reception;

a comparator configured to compare the positive/negative pulse signal with a reference value and to change the positive/negative pulse signal to a second positive pulse signal, thereby outputting the second positive pulse signal; and

a demodulator configured to demodulate the second positive pulse signal to reception digital data,

wherein the positive/negative pulse signal is a signal in which a positive pulse and a negative pulse intersect.

10. The apparatus of claim 9, wherein the demodulator comprises:

a first delay flip-flop configured to toggle the second positive pulse signal to output a toggling signal;

a second delay flip-flop configured to sample the toggling signal to output a sampling signal;

a third delay flip-flop configured to delay the sampling signal to output a delay signal; and

an exclusive OR gate configured to conduct an XOR operation for the sampling signal and the delay signal to output the reception digital data.

11. The apparatus of claim 9, wherein, when the pulse value of the positive/negative pulse signal is larger than the reference value, the comparator outputs the positive pulse, and when the pulse value of positive/negative pulse signal is smaller than the reference value, the comparator outputs “

0,”

so that the second positive pulse signal is output.

12. The apparatus of claim 8, further comprising:

a clock transmitter configured to transmit a clock signal used when generating the transmission digital data through a clock transmission coupler.

13. The apparatus of claim 8, further comprising:

an amplifier configured to amplify a clock signal received through a clock reception coupler; and

a clock generator configured to generate and output a clock signal harmonized to the amplified clock signal to be used when demodulating reception data.

14. The apparatus of claim 13, wherein the clock generator is a ring oscillator and the amplified signal is injection-locked to the ring oscillator.