Patents Assigned to Audioasics A/S
  • Publication number: 20130170673
    Abstract: A semiconductor die with an integrated electronic circuit, configured so as to be mounted in a housing with a capacitive transducer e.g. a microphone. A first circuit is configured to receive an input signal from the transducer at an input node and to provide an output signal at a pad of the semiconductor die. The integrated electronic circuit comprises an active switch device with a control input, coupled to a pad of the semiconductor die, to operatively engage or disengage a second circuit interconnected with the first circuit so as to operate the integrated electronic circuit in a mode selected by the control input. That is, a programmable or controllable transducer. The second circuit is interconnected with the first circuit so as to be separate from the input node. Thereby less noise is induced, a more precise control of the circuit is obtainable and more advanced control options are possible.
    Type: Application
    Filed: January 29, 2013
    Publication date: July 4, 2013
    Applicant: AudioAsics A/S
    Inventors: Mohammad SHAJAAN, Henrik THOMSEN, Jens Jorge GAARDE HENRIKSEN, Claus Erdmann FUERST
  • Patent number: 8447049
    Abstract: A semiconductor die with an integrated electronic circuit, configured so as to be mounted in a housing with a capacitive transducer e.g. a microphone. A first circuit is configured to receive an input signal from the transducer at an input node and to provide an output signal at a pad of the semiconductor die. The integrated electronic circuit comprises an active switch device with a control input, coupled to a pad of the semiconductor die, to operatively engage or disengage a second circuit interconnected with the first circuit so as to operate the integrated electronic circuit in a mode selected by the control input. That is, a programmable or controllable transducer. The second circuit is interconnected with the first circuit so as to be separate from the input node. Thereby less noise is induced, a more precise control of the circuit is obtainable and more advanced control options are possible.
    Type: Grant
    Filed: March 29, 2012
    Date of Patent: May 21, 2013
    Assignee: AudioAsics A/S
    Inventors: Mohammad Shajaan, Henrik Thomsen, Jens Jorge Gaarde Henriksen, Claus Erdmann Fuerst
  • Patent number: 8170237
    Abstract: A semiconductor die with an integrated electronic circuit, configured so as to be mounted in a housing with a capacitive transducer e.g. a microphone. A first circuit is configured to receive an input signal from the transducer at an input node and to provide an output signal at a pad of the semiconductor die. The integrated electronic circuit comprises an active switch device with a control input, coupled to a pad of the semiconductor die, to operatively engage or disengage a second circuit interconnected with the first circuit so as to operate the integrated electronic circuit in a mode selected by the control input. That is, a programmable or controllable transducer. The second circuit is interconnected with the first circuit so as to be separate from the input node. Thereby less noise is induced, a more precise control of the circuit is obtainable and more advanced control options are possible.
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: May 1, 2012
    Assignee: Audioasics A/S
    Inventors: Mohammad Shajaan, Henrik Thomsen, Jens Jorge Gaarde Henriksen, Claus Erdmann Fuerst
  • Patent number: 7928876
    Abstract: A method of controlling a sigma delta modulator with a loop which establishes a signal transfer function, STF, and a quantization noise transfer function, NTF, of the sigma delta modulator, wherein the sigma delta modulator receives an input signal, x(n), and provides a modulated output signal, y(n) in response to the input signal. The method is characterized in comprising the step of controlling the sigma delta modulator to change the quantization noise transfer function, NTF, in response to a signal feature, A(n), which is correlated with the input signal.
    Type: Grant
    Filed: April 11, 2005
    Date of Patent: April 19, 2011
    Assignee: Audioasics A/S
    Inventors: Henrik Thomsen, Claus Erdmann Fuerst
  • Patent number: 7899196
    Abstract: An integrated circuit, configured to process microphone signals, where the integrated circuit comprises: a preamplifier (306) with an amplifier section (301) which has a first input (?) and a second input (?*) and an output (?), and with a feedback filter network (Z1; Z1, Z1*, Z2) coupled between the output (?; ?, ?*) and the second input (??); where the first input (?) to the amplifier section (301) has an input impedance which by means of the input impedance of the amplifier section is substantially isolated from the feedback network with respect to input impedance; and where the preamplifier has a frequency-gain transfer function which suppress low frequencies; and an analogue-to-digital converter coupled to receive an anti-aliasing filtered input signal and providing a digital output signal (Do).
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: March 1, 2011
    Assignee: Audioasics A/S
    Inventors: Claus Erdmann Furst, Henrik Thomsen, Igor Mucha
  • Patent number: 7756279
    Abstract: A microphone preamplifier, comprising a differential input (102) 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 (103), 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 (105). Thereby a very compact (with respect to consumed area of the semiconductor substrate), low noise preamplifier is provided.
    Type: Grant
    Filed: October 14, 2004
    Date of Patent: July 13, 2010
    Assignee: AudioAsics A/S
    Inventors: Michael Deruginsky, Claus Erdmann Furst
  • Publication number: 20080219474
    Abstract: 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.
    Type: Application
    Filed: May 19, 2008
    Publication date: September 11, 2008
    Applicant: Audioasics A/S
    Inventors: Michael Deruginsky, Claus Erdmann Furst, Mohammad Shajaan, Daifi Sassene
  • Patent number: 7391873
    Abstract: An integrated circuit (102) configured to provide a microphone output signal, comprising: a preamplifier (108) 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 (104) to provide a bias voltage to either microphone member.
    Type: Grant
    Filed: December 1, 2004
    Date of Patent: June 24, 2008
    Assignee: Audioasics A/S
    Inventors: Michael Deruginsky, Claus Erdmann Furst, Mohammad Shajaan, Daifi Sassene