发明名称 |
Low-Power Magnetic Slope Detecting Circuit |
摘要 |
One embodiment of the present invention relates to a method and apparatus to perform a low power activation of a system by measuring the slope of a digital signal corresponding to a motion sensor measurement value. In one embodiment, a low power activation circuit is coupled to magnetic motion sensor configured to output a magnetic signal proportional to a measured magnetic field. The low power activation circuit may comprise a digital tracking circuit configured to provide a digital signal that tracks the magnetic field and a difference detector configured to detect a difference between a current digital signal and a prior digital signal stored in a digital storage means. If the detected difference is larger than a digital reference level, an activation signal is output to awaken a system from a sleep mode.
|
申请公布号 |
US2012182658(A1) |
申请公布日期 |
2012.07.19 |
申请号 |
US201113006654 |
申请日期 |
2011.01.14 |
申请人 |
MOTZ MARIO;INFINEON TECHNOLOGIES AG |
发明人 |
MOTZ MARIO |
分类号 |
H03K5/00;G01R25/00;G01R33/02;H02H3/20 |
主分类号 |
H03K5/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|