| 摘要 |
<p>A passive contactless card (CSC) is linked to an associated station (SD) by a magnetic field (CM) and antennae on card and station. An oscillator (10) at the station delivers a high frequency alternating signal via an amplifier (8) to the antenna (L1) and card (CSC) and data returned from the card is received at the station by an attenuator/dephaser (14) before passing to a mixer (20) and data amplifier (26)</p> |
