Knowles Electronics, Inc.

Vezio Malandruccolo

Luca Bettini

Mark Niederberger

Weiwen Dai

A sensor assembly including a transducer and interface circuit with a DSL-controlled input voltage is disclosed. The interface circuit includes a logic circuit configured to generate and provide a pulse width and amplitude modulated (PWAM) signal to an n-bit iDAC coupled to an analog front end (AFE) amplifier or buffer. The PWAM signal is based on an output of a forward signal-path ADC or low-power ADC coupled to the AFE amplifier or buffer, wherein the n-bit iDAC regulates a voltage at the input of the AFE amplifier or buffer based on the PWAM signal.

Sensor assembly with interface circuit voltage control

The disclosure relates generally to microphone and vibration sensor assemblies () having a transducer (), like a microelectromechanical systems (MEMS) device, and an electrical circuit () disposed in a housing () configured for integration with a host device. The electrical circuit includes a transducer bias circuit that applies a bias to the transducer and a bias control circuit () that compensates for transducer sensitivity drift caused by variation in an environmental condition of the transducer, and electrical circuits therefor.

Microphone assembly with transducer sensitivity drift compensation and electrical circuit therefor

The disclosure relates generally to microphone and vibration sensor assemblies () having a transducer (), like a microelectromechanical systems (MEMS) device, and an electrical circuit () disposed in a housing () configured for integration with a host device. The electrical circuit includes a variable gain signal processing circuit () that processes an electrical signal from the transducer and a gain control circuit () that compensates for transducer sensitivity drift caused by variation in an environmental condition of the transducer, and electrical circuits therefor.

Growing community of inventors

Rapperswil, Switzerland

Vezio Malandruccolo