DEVICE AND METHOD FOR USE IN INDUCTIVE SENSING

An inductive sensing device (22) is for sensing at two different frequencies. The device includes an antenna (24) which comprises at least two loop parts (30, 32), each loop part coupled to a different respective tuning capacitor (36a, 36b) to thereby provide different respective resonant frequencies for the first and second loop parts. The two loop parts are jointly connected to a shared input connection (38) for receiving driving signals for driving both antenna parts. A control means (44) controls a drive circuit (34) to supply the antenna, via the shared input connection, drive signals ofeach of the frequencies, implementing switching between the two. 一种感应式感测设备(22)被用于在两个不同的频率下进行感测。所述设备包括天线(24)，所述天线包括至少两个环部分(30、32)，每个环部分被耦合到不同的相应的调谐电容器(36a、36b)，以由此为第一和第二环部分提供不同的相应的谐振频率。两个环部分被共同连接到共享的输入连接(38)以便接收用于驱动两个天线部分的驱动信号。控制器件(44)控制驱动电路(34)经由所述共享的输入连接向所述天线供应所述频率中的每个的驱动信号，实现在两者之间的切换。