公开(公告)号：US08645062B2

公开(公告)日：2014-02-04

申请号：US13745186

申请日：2013-01-18

申请人： Texas Instruments Incorporated

发明人： June Chul Roh ,  Deric Wayne Waters ,  Srinath Hosur ,  Goutam Dutta

IPC分类号： G01C21/16

CPC分类号： G01S19/47 ,  G01C21/165 ,  G01C21/28 ,  G01C22/006 ,  G06F17/16

摘要： Embodiments of the invention provide a step detection. An accelerometer measurement in the form of a multi-dimensional acceleration vector is obtained. The magnitude of the accelerometer measurement is filtered using a low pass filter. A threshold for a down-crossing is provided as is a threshold for an up-crossing. A step detection is triggered if the magnitude of the accelerometer measurement is greater than or equal to the threshold for an up-crossing.

摘要翻译： 本发明的实施例提供了步骤检测。 获得多维加速度矢量形式的加速度计测量。 使用低通滤波器对加速度计测量的幅度进行滤波。 提供了一个下划线的阈值，就像上一交叉口的阈值一样。 如果加速度计测量的幅度大于或等于上行阈值，则触发步进检测。

公开(公告)号：US20130093496A1

公开(公告)日：2013-04-18

申请号：US13680549

申请日：2012-11-19

申请人： TEXAS INSTRUMENTS INCORPORATED

发明人： Deric Wayne Waters ,  Karthik Ramasubramanian ,  Arun Raghupathy

IPC分类号： H04B1/16

CPC分类号： H04B1/1615 ,  G01S19/34

摘要： An electronic circuit includes a receiver circuit (BSP) operable to perform coherent summations having a coherent summations time interval, and a power control circuit (2130) coupled to said receiver circuit (BSP) and operable to impress a power controlling duty cycle (TON, TOFF) on the receiver circuit (BSP) inside the coherent summations time interval. Other circuits, devices, systems, methods of operation and processes of manufacture are also disclosed.