发明名称 |
Wireless powered communication device using power signal sampling and method |
摘要 |
A circuit (34) for data recovery in a wireless powered communication device (10) obviates the need for the costly high power consumption filters of prior art devices by deriving a clock signal from the power coil (18), and then sampling the data coil (20) signal with the derived sampling clock. The step of deriving a clock signal from the power signal causes the component of the power signal present on the data signal to be aliased to DC which is then easily rejected with a low order high pass or bandpass filter (38). Furthermore, the data signal may be amplified to a desired level suitable for amplitude discrimination by a simple comparator circuit (40) with hysteresis. Demodulation of the data signal is easily accomplished in the digital domain using a digital demodulator (32).
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申请公布号 |
US5940447(A) |
申请公布日期 |
1999.08.17 |
申请号 |
US19960706064 |
申请日期 |
1996.08.30 |
申请人 |
MOTOROLA, INC. |
发明人 |
CONNELL, LAWRENCE E.;HOLLENBECK, NEAL W.;PAITL, KENNETH A. |
分类号 |
G06K7/08;G06K19/07;H02J17/00;H04B5/00;H04B5/02;H04L25/02;H04L27/06;(IPC1-7):H03D1/24 |
主分类号 |
G06K7/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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