Patent ID: 11932533
Assignee: INFINEON TECHNOLOGIES AG
Field: Micro-structural and nano-technology (Chemistry)
Classification: CPC B  H | IPC B

Claim 11:
12. A method of reading-out a microelectromechanical system (MEMS) device, the MEMS device comprising a first membrane, a second membrane and a third membrane spaced apart from one another, the second membrane being between the first membrane and the third membrane, a first stator between the first membrane and the second membrane, and a second stator between the second membrane and the third membrane, the method comprising:
forming a first capacitor between the first membrane and the first stator, a second capacitor between the first stator and the second membrane, a third capacitor between the second membrane and the second stator, and a fourth capacitor between the second stator and the third membrane, wherein a sealed low pressure chamber is between the first membrane the third membrane;
configuring the first capacitor, the second capacitor, the third capacitor and the fourth capacitor in a series configuration to increase motor sensitivity of the MEMS device or in a parallel configuration to reduce an output impedance of the MEMS device; and
in a fifth read-out operating mode,
biasing the first membrane and a top electrode layer of the second membrane with a first voltage source,
biasing the third membrane and a bottom electrode layer of the second membrane with a second voltage source, and
reading-out an output signal through an amplifier connected to the first stator and the second stator.