SYSTEMS, DEVICES, CIRCUITS AND METHODS FOR COMMUNICATING IN A COMMUNICATION SYSTEM

• US 20140002244A1
• Filed: 03/18/2011
• Published: 01/02/2014
• Est. Priority Date: 03/18/2011
• Status: Active Grant

• Current Assignee: Silicon Craft Technology Public Co., Ltd.
• Original Assignee: Silicon Craft Technology Co., Ltd.
• Inventors: Sirinamaratana, Pairote, Opasjumruskit, Karn
• Granted Patent: US 9,818,055 B2
• Time in Patent Office: Days
• US Class Current: 340/10.1
• CPC Class Codes: G06K 19/077 Constructional details, e.g. mounting of circuits in the carrier
• CPC Class Codes: G06K 19/07749 the record carrier being capable of non-contact communication, e.g. constructional details of the antenna of a non-contact smart card

Abstract

Example embodiments relate to a circuit, communication device, communication system, computer readable medium and method for communicating in a communication system. The communication device comprises an antenna, a resonant storage element for storing at least some energy received by the antenna, a processor for controlling a release of stored energy to generate a modulated signal upon receiving an interrogating signal from one or more reader devices, wherein said modulated signal is a signal comprising digital data represented by at least one predefined sequence of transitions between a high energy level and a low energy level, and a selective energy circuit in selective cooperation with the resonant storage element to affect a greater high energy level amplitude of the modulated signal upon the modulated signal transitioning from a low energy level to a high energy level when in cooperation.

Claims

1. A communication device for communicating with one or more reader devices, said communication device comprising:

an antenna;

a resonant storage element for storing at least some energy received by the antenna;

a processor for controlling a release of stored energy to generate a modulated signal, wherein said modulated signal is a signal comprising digital data represented by at least one predefined sequence of transitions between a high energy level and a low energy level; and

a selective energy circuit in selective cooperation with the resonant storage element to affect a greater high energy level amplitude of the modulated signal upon the modulated signal transitioning from a low energy level to a high energy level when in cooperation.

2. The communication device according to claim 1, wherein the said greater high energy level amplitude is generated by a release of stored energy from the selective energy circuit.

4. The communication device according to claim 2, wherein the releasing of stored energy from the selective energy circuit begins on or after a first zero crossing of a high energy level segment of the modulated signal.

8. The communication device according to claim 4, wherein the releasing of stored energy on or after a first zero crossing occurs in one or more separate steps.

9. The communication device according to claim 2, wherein the stored energy of the selective energy circuit is drawn from energy stored in the resonant storage element.

10. The communication device according to claim 9, wherein the drawing of energy from the resonant storage element occurs during data transmission times.

11. The communication device according to claim 10, wherein the drawing of energy from the resonant storage element occurs before the modulated signal transitions from a high energy level to a low energy level.

13. The communication device according to claim 2, wherein the stored energy of the selective energy circuit is drawn during non-data transmission times.

15. The communication device according to claim 2, wherein the selective energy circuit comprises a capacitor for storing energy, said capacitor configurable to be in parallel with the resonant storage element when releasing and storing energy, said capacitor having a capacitance value between about 2 to 3.5 times the size of the resonant storage element.

20. The communication device according to claim 2, wherein the selective energy circuit comprises a first capacitor and a second capacitor, said first capacitor configurable to be in parallel with said second capacitor when storing energy and said first capacitor configurable to be in series with said second capacitor when releasing energy, said first capacitor having a capacitance value of about 6 times the size of the resonant storage element and said second capacitor having a capacitance value of about 6 times the size of the resonant storage element.

21. The communication device according to claim 2, wherein the selective energy circuit comprises a first capacitor and a second capacitor, said first capacitor and said second capacitor configurable to be in series when releasing and storing energy, said first capacitor having a capacitance value of about 3 times the size of the resonant storage element and said second capacitor having a capacitance value of at least 50 times the size of the resonant storage element, wherein the voltage polarity across the first capacitor is alternatable between a positive and a negative voltage polarity with each transition from a low energy level to a high energy level.

22. The communication device according to claim 2, wherein the selective energy circuit comprises a capacitor, said capacitor configurable to be in parallel with the resonant storage element when releasing an impulse of energy, said capacitor having a capacitance value of at least 50 times the size of the resonant storage element.

23. The communication device according to claim 2, wherein the selective energy circuit comprises a first capacitor and a second capacitor, said first capacitor configurable to be in parallel with said second capacitor when said first capacitor is drawing energy from said second capacitor, said first capacitor configurable to be in parallel with the resonant storage element when said first capacitor is releasing energy to the resonant storage element, said first capacitor having a capacitance value of about 3 times the size of the resonant storage element and said second capacitor having a capacitance value of at least 50 times the size of the resonant storage element.

24. The communication device according to claim 2, wherein the operation of storing of at least some energy received by the antenna and the operation of releasing of stored energy is alternatable between the resonant storage element and the selective energy circuit upon a transition between a high energy level and a low energy level.

3. (canceled)

5-7. -7. (canceled)

12. (canceled)

14. (canceled)

16-19. -19. (canceled)

25-34. -34. (canceled)

35. A method of communicating between one or more reader devices and a communication device in a communication system, comprising the steps of:

transmitting an interrogating signal from a reader device;

receiving, at the communication device, the interrogating signal;

converting, at the communication device, the received interrogating signal into storable energy;

storing the converted energy;

retrieving, at the communication device, data stored in internal memory and generating a modulated signal using the converted energy, wherein said modulated signal is a signal comprising the retrieved data represented by at least one predefined sequence of transitions between a high energy level and a low energy level;

generating, at the communication device, a response signal for transmitting to the reader device by affecting an increase in high energy level amplitude of said modulated signal upon or after said modulated signal transitioning from a low energy level to a high energy level; and

receiving, at a reader device, the response signal.

36. The method according to claim 35, wherein the step of generating the response signal by affecting an increase in high energy level amplitude is achievable by adding additional energy to the modulated signal beginning on or after a first zero crossing of a high energy level segment of the modulated signal.

40. The method according to claim 36, wherein the adding of additional energy on or after a first zero crossing occurs in one or more separate steps.

41. The method according to claim 35, wherein the step of generating the response signal further comprises drawing energy from the converted energy.

43. The method according to claim 41, wherein the drawing of the converted energy occurs before the modulated signal transitions from a high energy level to a low energy level.

37-39. -39. (canceled)

42. (canceled)

44. (canceled)

45. A communication system comprising:

one or more reader devices, wherein at least one reader device is for transmitting an interrogating signal and at least one reader device is for receiving a response signal; and

a communication device for receiving an interrogating signal from at least one reader device, converting said interrogating signal into storable energy, storing said converted energy into a resonant storage element, using said stored energy to generate a modulated signal, and generating a response signal for transmission to at least one reader device by affecting an increase in high energy level amplitude of the modulated signal upon or after the modulated signal transitioning from a low energy level to a high energy level.

46-54. -54. (canceled)