压力检测芯片和检测压力的方法技术

一种压力检测芯片和检测压力的方法，该方法由包括抵消电路(120)和耦合电路(200)的压力检测装置(300)执行，该抵消电路(120)和耦合电路(200)并联，该耦合电路(200)包括具有第一电极层与第二电极层的可变电容部件，该第一电极层在受到触摸压力时与该第二电极层之间的距离改变。该压力检测方法包括：向该抵消电路输入第一输入信号并输出第一输出信号(S410)；向该耦合电路输入第二输入信号并输出第二输出信号，该第一输入信号与该第二输入信号的相位相差180度，该第一输出信号用于抵消该第二输出信号(S420)；根据该第一输出信号与该第二输出信号，确定该第一电极层是否受到该触摸压力(S430)。该压力检测芯片和检测压力的方法，能够提高压力检测的灵敏度。

Pressure detection chip and method of pressure detection

A pressure detecting chip and a method for detecting pressure, the method is performed by a pressure detecting device (300) including an offset circuit (120) and a coupling circuit (200), the offset circuit (120) and the coupling circuit (200) are in parallel, the coupling circuit (200) includes a variable capacitance component having a first electrode layer and a second electrode layer, the first electrode layer and the second electrode layer when subjected to touch pressure The distance changes. The pressure detection method includes: inputting a first input signal and outputting a first output signal (S410) to the cancellation circuit; inputting a second input signal and outputting a second output signal to the coupling circuit, the phase difference between the first input signal and the second input signal is 180 degrees, the first output signal is used to cancel the second output signal (S420); according to the first output signal and the second output signal Two output signals determine whether the first electrode layer is subject to the touch pressure (s430). The pressure detection chip and method can improve the sensitivity of pressure detection.

【技术实现步骤摘要】
【国外来华专利技术】PCT国内申请，说明书已公开。

【技术保护点】
PCT国内申请，权利要求书已公开。/n

【技术特征摘要】
【国外来华专利技术】PCT国内申请，...

【专利技术属性】
技术研发人员：魏海军，陈土江，
申请(专利权)人：深圳市汇顶科技股份有限公司，
类型：发明
国别省市：广东;44