Audioasics A/s

Analog Devices,inc.

Knowles Electronics, Inc.

Michael Deruginsky

Henrik Thomsen

Mohammad Shajaan

Dibyendu Nandy

Daifi Sassene

Claus Erdmann Fuerst

Oddy N Khamharn

An integrated circuit configured to provide a microphone output signal, comprising: a preamplifier coupled to receive an input signal, generated by either a first microphone member or a second microphone member, where one of the members is movable relative to the other microphone member; a voltage pump to output a pumped voltage; and a low-pass filter coupled to filter the pumped voltage from the voltage pump and to provide a bias voltage to either microphone member.

Microphone with voltage pump

A microphone preamplifier, comprising a differential input () stage with a first and a second input terminal and an output stage with an output terminal; where the microphone preamplifier is integrated on a semiconductor substrate. A feedback circuit, with a low-pass frequency transfer function (), is coupled between the output terminal and the first input terminal and integrated on the semiconductor substrate. The second input terminal provides an input for a microphone signal (). Thereby a very compact (with respect to consumed area of the semiconductor substrate), low noise preamplifier is provided.

Microphone preamplifier

An integrated circuit () configured to provide a microphone output signal, comprising: a preamplifier () coupled to receive an input signal, generated by a first microphone member that is movable relative to a second microphone member; and a voltage pump () to provide a bias voltage to either microphone member.

Growing community of inventors

Hillerod, Denmark

Michael Deruginsky