Dynamic configuration of a radio frequency transponder

一种应答机、配置参数的技术，应用在在发射应答器中近场传输系统、机器使用的记录载体、计算机零部件等方向，能够解决磁场有效询问范围减小等问题

Active Publication Date: 2007-05-16
MICROCHIP TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Consequently, the effective interrogation range of the magnetic field decreases rapidly

Method used

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  • Dynamic configuration of a radio frequency transponder
  • Dynamic configuration of a radio frequency transponder
  • Dynamic configuration of a radio frequency transponder

Examples

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Embodiment Construction

[0055] Referring now to the drawings, there are shown schematically details of various exemplary embodiments of the invention. Like elements in the various figures will be represented by the same number, and like elements will be represented by the same number with a different lowercase letter suffix.

[0056] Referring to FIG. 2 , it illustrates a schematic block diagram of an exemplary embodiment of a remote keyless entry (RKE) system according to the present invention. The RKE system (which is generally indicated by reference number 200) includes: a base station 202, which is typically disposed in a vehicle in automotive applications or in a residence or office in secure entry applications; A communicating RKE transponder 204, such as a key fob. Base station 202 may include a radio frequency receiver 206 , antenna 210 and a low frequency transmitter / reader 208 and associated antenna 212 . Transponder 204 may include a radio frequency transmitter 222 , antenna 218 , a low ...

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PUM

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Abstract

The invention discloses a multi-channel remote keyless entry (RKE) transponder having dynamically reconfigurable input channel selection, channel disable, settable sensitivity for each channel, wake-up filter timing parameters, automatic gain control hold, internal tuning capacitor selection for each channel's antenna, minimum modulation depth requirement for input signal and bi-directional talk-back. Programmable minimum modulation depth requirement reduces false wake-up of the RKE transponder. An antenna for each channel of the RKE transponder may be tuned with internal tuning capacitors for improved range and receiver sensitivity. The internal tuning capacitor parameters may be stored in a configuration register. Gain of the channel may be fixed while the antenna is tuned. The antennas may be de-queued for talk-back to a base station for low frequency bidirectional communications. An external control device may dynamically read from and write to the configuration registers via a serial communications interface.

Description

technical field [0001] The present invention relates generally to inductively coupled magnetic field transmission and detection systems, such as remote keyless entry (RKE) and passive keyless entry (PKE) systems, and more particularly to a method for dynamically configuring such systems. Parameters of equipment and methods. Background technique [0002] The use of Remote Keyless Entry (RKE) systems in automotive and security applications has increased significantly in recent years. A conventional Remote Keyless Entry (RKE) system consists of an RKE transmitter and a base station. The RKE transmitter has an activation button. When an activation button is pressed, the RKE transmitter transmits corresponding radio frequency data to the base station. The base station receives the data and if the received data is valid then takes appropriate action such as unlocking / locking the doors or trunk. In a conventional RKE system, data is transmitted from the RKE transmitter to the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K19/07G07C9/00
CPCG06K19/07767G06K19/0726G06K19/0723H04B5/45
Inventor 托马斯·尤博克·李詹姆斯·B·诺兰史蒂夫·维尼尔鲁安·洛伦斯维维安·德尔波艾伦·兰费尔格伦·艾伦·沙利文
Owner MICROCHIP TECH INC
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