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Low power wake-up mode detection for multiple data streams

A wake-up mode, data packet technology, applied in power management, electrical digital data processing, digital data processing components, etc., can solve problems such as limited power or energy resources identified

Pending Publication Date: 2022-08-02
TEXAS INSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such applications, there are limited power or energy resources for identification of wireless keyless entry systems

Method used

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  • Low power wake-up mode detection for multiple data streams
  • Low power wake-up mode detection for multiple data streams
  • Low power wake-up mode detection for multiple data streams

Examples

Experimental program
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Embodiment Construction

[0010] In an embodiment, the detector includes a plurality of "N" data packet layers, wherein each data packet layer includes a plurality of "M" index registers ("M" and "N" are integers), where "M" is The number of wake-up mode bits, "N" is the number of data streams (which is the product of the number of antennas times the number of demodulators from the transceiver). For example, 3 antennas * 12 demodulators. As discussed further below, "N" translates the number of data layers. Each packet layer is coupled to "M" comparators, where the "M" comparators may be shared by multiple "N" packet layers.

[0011] To update the index registers, clock gating on each index register is used to independently activate the index registers to sample the data stream. The updated index register will be compared with the corresponding shift register through the corresponding comparator. Trigger conditions can be generated based on matching results from multiple "M" comparators.

[0012] f...

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PUM

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Abstract

The present application describes a technique for wakeup mode-data flow correlation by a detector to provide a trigger condition for a microcontroller in a wakeup receiver (WuRX). For example, a detector (118) includes a data packet layer (200) having a plurality of index registers (202) that are updated by sampling of a data stream (208). A sampling clock [204] is coupled to each of the plurality of index registers to independently activate each of the plurality of index registers. The shared comparator (212) then compares the updated plurality of index registers with corresponding shift registers (210) that are initialized with the alternate wake-up mode bits (220). Based on the number of matching results, the detector generates a trigger signal (228) that facilitates a change in the low-power mode of operation to the high-power mode of operation.

Description

Background technique [0001] Radio Frequency Identification (RFID) uses radio waves to read and capture information stored on tags attached to objects. Tags can be read from several feet away and do not need to be in direct line of sight of the reader to be tracked. [0002] RFID is used in many applications such as identification of passive or wireless keyless entry systems. In such applications, there are limited power or energy resources for identification of wireless keyless entry systems. Therefore, it is a common practice for RFID transponders to monitor received RF signals and determine whether they contain a specific wake-up pattern. To this end, RFID transponders include a wake-up mode mechanism that continuously monitors incoming signals from multiple sources. Description of drawings [0003] The detailed description is described with reference to the accompanying drawings. In the figures, the left-most digit(s) of a reference number identifies the figure in whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/38
CPCG06F1/3209G06K19/0705B60R25/24H04W52/0235Y02D30/70G06F1/12G06F1/3287
Inventor A·M·肖克E·穆勒纳
Owner TEXAS INSTR INC
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