发明名称 |
METHOD, SYSTEM AND APPARATUS FOR CALIBRATING A PULSE POSITION MODULATION (PPM) DECODER TO A PPM SIGNAL |
摘要 |
A radio frequency identification (RFID) tag device having a pulse position modulation (PPM) decoder circuit which calculates a relative frequency relationship between an internal oscillator of the RFID tag device and an external PPM source such as a RFID tag reader. The PPM decoder circuit is calibrated to the difference between the external PPM frequency source (i.e., RFID tag reader) and the internal clock-oscillator of the RFID tag device, which is performed in a single measurement during one calibration symbol period. |
申请公布号 |
WO0201246(A2) |
申请公布日期 |
2002.01.03 |
申请号 |
WO2001US19599 |
申请日期 |
2001.06.20 |
申请人 |
MICROCHIP TECHNOLOGY INCORPORATED |
发明人 |
ALEXANDER, SAMUEL, E.;LOYER, STEPHEN, R. |
分类号 |
G01S13/78;G01S13/76;G06K19/07;H04B14/02 |
主分类号 |
G01S13/78 |
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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