公开(公告)号：US20160011235A1

公开(公告)日：2016-01-14

申请号：US14751254

申请日：2015-06-26

Applicant: STMICROELECTRONICS S.r.I.

Inventor： Riccardo CONDORELLI ,  Daniele MANGANO

IPC: G01R15/16 ,  G01R15/18

CPC classification number: G01R15/16 ,  G01D3/032 ,  G01R15/18

Abstract: A method of interfacing an LC sensor with a control unit is described. The control unit may include first and second contacts, and the LC sensor may be connected between the first and second contacts. The method may include starting the oscillation of the LC sensor, and monitoring the voltage at the second contact, in which the voltage at the second contact corresponds to the sum of the voltage at the first contact and the voltage at the LC sensor. The voltage at the first contact may be varied such that the voltage at the second contact does not exceed an upper voltage threshold and does not fall below a lower voltage threshold.

Abstract translation: 描述了将LC传感器与控制单元接口的方法。 控制单元可以包括第一和第二触点，并且LC传感器可以连接在第一和第二触点之间。 该方法可以包括启动LC传感器的振荡，以及监测第二接触处的电压，其中第二接触处的电压对应于第一接触处的电压和LC传感器的电压之和。 可以改变第一接触处的电压，使得第二接触处的电压不超过上限电压阈值，并且不低于低电压阈值。

公开(公告)号：US20160011291A1

公开(公告)日：2016-01-14

申请号：US14739195

申请日：2015-06-15

Applicant: STMICROELECTRONICS S.r.I.

Inventor： Riccardo CONDORELLI ,  Daniele MANGANO

IPC: G01R35/00 ,  G01D5/24 ,  H02J7/04 ,  G01R27/26

CPC classification number: G01R35/005 ,  G01D3/028 ,  G01D5/24 ,  G01R27/02 ,  G01R27/2605 ,  G01R35/00 ,  H02J7/045 ,  H02J7/345

Abstract: A method of interfacing a LC sensor with a control unit is provided. The control unit may include first and second contacts, where the LC sensor is connected between the first and the second contact. A capacitor is connected between the first contact and a ground. To start the oscillation of the LC sensor, the method may include during a first phase, connecting the first contact to a supply voltage and placing the second contact in a high impedance state such that the capacitor is charged through the supply voltage. During a second phase, the first contact may be placed in a high impedance state, and the second contact connected to the ground such that the capacitor transfers charge towards the LC sensor. During a third phase, the first contact and the second contact may be placed in a high impedance state so the LC sensor is able to oscillate.

Abstract translation: 提供了一种将LC传感器与控制单元接口的方法。 控制单元可以包括第一和第二触点，其中LC传感器连接在第一和第二触点之间。 电容器连接在第一触点和地之间。 为了开始LC传感器的振荡，该方法可以包括在第一阶段期间，将第一接触连接到电源电压并将第二接触置于高阻抗状态，使得电容器通过电源电压充电。 在第二阶段期间，第一接触可以被置于高阻抗状态，并且第二接触件连接到接地，使得电容器向LC传感器传送电荷。 在第三阶段期间，第一接触和第二接触可以被置于高阻抗状态，使得LC传感器能够振荡。