Signal transmission/reception device

• US 8,289,012 B2
• Filed: 12/21/2007
• Issued: 10/16/2012
• Est. Priority Date: 12/22/2006
• Status: Active Grant

• Current Assignee: Valeo Securite Habitacle (Valeo SE)
• Original Assignee: Valeo Securite Habitacle (Valeo SE)
• Inventors: Notarianni, Michael, Leconte, Eric, Violleau, Stéphane
• Primary Examiner(s): He, Amy
• Application Number:
  US12/520,788
• Publication Number:
  US 20100148749A1
• Time in Patent Office: 1,761 Days
• Field of Search: 324/76.11, 324/713
• US Class Current: 324/76.11
• CPC Class Codes: H04B 5/26 using coils
• CPC Class Codes: H04B 5/48 Transceivers
• CPC Class Codes: H04W 52/42 in systems with time, space, frequency or polarisation diversity

Abstract

The invention relates to a signal transmission/reception device (DER) which can cooperate with an antenna device (A) capable of emitting a magnetic field. The invention is characterized in that the device (DER) comprises the following elements for transmission, namely: a power stage (P) for sending a symmetrical square-wave voltage signal (U0) to the input of the antenna device (A) in order to supply same with a current that can be used to generate the emitted magnetic field; and a current measuring stage (C) for measuring the current circulating in the antenna device (A). The invention is suitable for motor vehicles.

Claims

1. A signal transmission-reception device (TRD) configured to cooperate with an antenna device that emits a magnetic field, wherein the signal transmission-reception device comprises, for transmission:

a power stage for sending a symmetric square voltage signal as input to the antenna device so as to provide the antenna device with a current for generating the magnetic field emitted, and

a current measurement stage for measuring the current flowing in the antenna device.

2. The transmission-reception device (TRD) as claimed in claim 1, wherein the voltage signal comprises a duty ratio of 1/3.

3. The transmission-reception device (TRD) as claimed in claim 1, wherein the power stage is with complete-bridge control.

4. The transmission-reception device (TRD) as claimed in claim 1, wherein the measurement stage is a peak detector.

5. The transmission-reception device (TRD) as claimed in claim 1, wherein the antenna device is an RLC circuit.

6. A signal transmission-reception system (SYS) comprising an antenna device and a transmission-reception device (TRD) as claimed in claim 1, wherein the transmission-reception device is configured to cooperate with the antenna device.

7. The transmission-reception system (SYS) as claimed in claim 6, wherein the antenna device is an RLC circuit.

9. A motor vehicle comprising a transmission-reception device (TRD) as claimed in claim 1, wherein the transmission-reception device is configured to cooperate with an antenna device.

8. A method of transmitting-receiving signals bound for an antenna device, comprising:

sending a symmetric square voltage signal as input to the antenna device provide the antenna device with a current for generating a magnetic field emitted by the antenna device, and

measuring the current flowing in the antenna device.