发明名称 |
Demodulator for contactless chip cards |
摘要 |
The amplitude demodulator has a peak detection circuit (10) extracting a reference modulation signal and a translation circuit (12) to shift the reference signal to offset its direct component. A threshold is generated (14) to act as reference for modulation start and finish. A comparator (16) compares the shifted signal to the threshold signal to activate supply (20) to components on the chip.
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申请公布号 |
EP1335486(A1) |
申请公布日期 |
2003.08.13 |
申请号 |
EP20030290175 |
申请日期 |
2003.01.23 |
申请人 |
GEMPLUS;STMICROELECTRONICS S.A. |
发明人 |
RIZZO, PIERRE |
分类号 |
G06K19/07;H03D1/18;H03K5/08;(IPC1-7):H03D1/18 |
主分类号 |
G06K19/07 |
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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