Circuit For A Communication Device And Method Of Controlling A Transmission

• US 20080198907A1
• Filed: 04/25/2006
• Published: 08/21/2008
• Est. Priority Date: 04/28/2005
• Status: Active Grant

• Current Assignee: NXP B.V. (NXP Semiconductors NV)
• Original Assignee: NXP B.V. (NXP Semiconductors NV)
• Inventors: Breitfuss, Klemens
• Granted Patent: US 7,929,456 B2
• Time in Patent Office: Days
• US Class Current: 375/219
• CPC Class Codes: H04B 5/48 Transceivers
• CPC Class Codes: H04B 5/72 for local intradevice communication
• CPC Class Codes: H04B 5/77 for interrogation

Abstract

A circuit (3) for a communication device (1), which communication device (1) comprises a transmission coil (2) that is provided for communicating with a further device (1′), comprises a transmitter (4), which transmitter (4) is designed to receive transmission data (TD) and to cooperate with the transmission coil (2) and to release to the transmission coil (2) a transmission data signal (TDS) that represents the transmission data (TD), and further comprises a receiver (5), which receiver is designed to cooperate with the transmission coil (2) and to receive from the transmission coil (2) a reception data signal (RDS) and to provide reception data (RD) that represent the reception data signal (RDS), and further comprises a control stage (7), which control stage (7) is designed to control the transmitter (4) for releasing the transmission data signal (TDS) simultaneous to the receiving of the reception data signal (RDS) by means of the receiver (5).

Claims

1. Circuit for a communication device, which communication device comprises transmission means that are provided for communicating with a further device, which circuit comprises a transmitter, which transmitter is designed to receive transmission data and to cooperate with the transmission means and to release to the transmission means a transmission data signal that represents the transmission data, and a receiver, which receiver is designed to cooperate with the transmission means and to receive from the transmission means a reception data signal and to provide reception data that represent the reception data signal, and control means, which control means are designed to control the transmitter for releasing the transmission data signal simultaneous to the receiving of the reception data signal by means of the receiver.

2. Circuit according to claim 1, wherein the transmitter is designed to receive a signal parameter control signal and to produce a modulated carrier signal dependent on the transmission data and dependent on the signal parameter control signal, such that at least one signal parameter of the modulated carrier signal is determined by the signal parameter control signal, and to release the modulated carrier signal as the transmission data signal.

3. Circuit according to claim 2, wherein signal parameter determining means are provided, which signal parameter determining means are designed to receive the transmission data signal and to determine at least one transmission signal parameter of the transmission data signal and to generate and to release a first parameter representation signal that represents at least one transmission signal parameter and to receive the reception data signal and to determine at least one reception signal parameter of the reception data signal and to generate and to release a second parameter representation signal that represents at least one reception signal parameter, and the control means are designed to receive the first parameter representation signal and the second parameter representation signal and to release dependent on said parameter representation signals the signal parameter control signal such that a difference between the determined at least one reception signal parameter and the corresponding transmission signal parameter is reduced.

4. Circuit according to claim 1, wherein the control means are designed to provide the transmission data that represent a first number and to receive the reception data that represent a second number originating from the further device, and the receiver is designed to detect a collision signal represented by the reception data signal, which collision signal indicates that the reception data signal represents two different numbers, wherein one number of the two numbers is the first number being represented by the released transmission data signal and the other number of the two numbers is the second number originating from the further device, and to receive the transmission data and to derive based on the known first number represented by the transmission data the second number originating from the further device and to release the reception data representing the derived second number.

5. Communication device, comprising transmission means that are provided for a communication with a further device, and a circuit according to claim 1.

9. Method according to claim 1, wherein a first number is represented by the transmission data, and a collision signal represented by the reception data signal is detected, which collision signal indicates that the reception data signal represents two different numbers, wherein one number of the two numbers is a first number being represented by the transmitted transmission data signal and the other number of the two numbers is a second number originating from the further device, and the second number originating from the further device is derived based on the known first number represented by the transmission data and the derived second number is represented by the reception data.

6. Method of controlling a transmission of a transmission data signal, which method comprises the following steps, namely receiving of a reception data signal from a further device and providing reception data representing the reception data signal, and transmitting simultaneous to the receiving of the reception data signals a transmission data signal representing transmission data.

7. Method according to claim 6, wherein the transmitting of the transmission data signal comprises producing a modulated carrier signal by means of modulating a carrier signal dependent on the transmission data and dependent on a signal parameter control signal, such that at least one signal parameter of the modulated carrier signal is determined by the signal parameter control signal, and releasing the modulated carrier signal as the transmission data signal.

8. Method according to claim 7, wherein a transmission signal parameter of the transmission data signal is determined and a first parameter representation signal is released that represents at least one transmission signal parameter, and a reception signal parameter of the reception data signal is determined and a second parameter representation signal is released that represents at least one reception signal parameter, and dependent on said representation signals the signal parameter control signal is released such that a difference between the determined at least one reception signal parameter and the corresponding transmission signal parameter is reduced.