Patents by Inventor Andreas Fitzi

Andreas Fitzi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20170005622
    Abstract: An amplifier arrangement is presented, comprising a first differential stage (DS1) comprising at least two transistors (M1, M1?) having a first threshold voltage (Vth1), at least a second differential stage (DS2) comprising at least two transistors (M3, M3?) having a second threshold voltage different from the first threshold voltage, at least one of the transistors of the first and second differential stage (DS1, DS2), respectively, has a control input commonly coupled to an input of the amplifier arrangement, at least one transistor (M1) of the first differential stage and one transistor (M3) of the second differential stage are arranged in a common current path, which is coupled to an output of the amplifier arrangement.
    Type: Application
    Filed: September 25, 2014
    Publication date: January 5, 2017
    Applicant: ams AG
    Inventor: Andreas FITZI
  • Publication number: 20150102209
    Abstract: An optical sensor arrangement (10) comprises a photodiode (11) for providing a sensor current (IPD) and an analog-to-digital converter arrangement (12) which is coupled to the photodiode (11) and determines a digital value of the sensor current (IPD) in a charge balancing operation in a first phase (A) and in another conversion operation in a second phase (B).
    Type: Application
    Filed: October 15, 2014
    Publication date: April 16, 2015
    Inventors: Gonggui XU, Andreas FITZI
  • Patent number: 8179184
    Abstract: An arrangement for charge integration comprises an input (1) for the provision of a charge-dependent signal and an integrator (30) to integrate a signal present at its input. In addition, a coupling circuit (20) that can adopt at least two operating states is provided to couple the input (1) to the integrator (30) which has a temperature-dependent coupling characteristic. A correction circuit (10) that can be operated by a clock signal is coupled to the input (1) in order to transfer a quantity of charge, and has a temperature characteristic that is derived from the coupling characteristic of the coupling circuit (20).
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: May 15, 2012
    Assignee: austriamicrosystems AG
    Inventor: Andreas Fitzi
  • Publication number: 20110309803
    Abstract: In one embodiment, a method for switching an electrical load having at least one capacitive component and one inductive component in a bridge branch of a bridge circuit comprises a charging of the bridge branch to a first voltage (V1) in a forward switching phase (F), a discharging of the capacitive component of the electrical load in a first open switching phase (O1), a charging of the bridge branch to a second voltage (V2) in a reverse switching phase (R), with the second voltage (V2) being polarized inversely from the first voltage (V1), and a negative charging of the capacitive component of the electrical load in a second open switching phase (O2). A bridge circuit is also provided.
    Type: Application
    Filed: April 19, 2011
    Publication date: December 22, 2011
    Applicant: AUSTRIAMICROSYSTEMS AG
    Inventors: Andreas FITZI, Stephan DOBRETSBERGER
  • Patent number: 8035997
    Abstract: Circuitry includes an acquiring circuit to acquire period and phase information of an oscillation. The acquiring circuit includes a first input electrically coupled to a first connection and a second input electrically coupled to a second connection. The first connection and the second connection are for electrically coupling to an oscillating circuit. A control circuit includes a first input electrically coupled to an output of the acquiring circuit. The control circuit includes a second input electrically coupled to a third connection for supply of a voltage that is based on the rectified voltage. A switch includes a controlled segment for electrically coupling a fourth connection to a reference potential connection, and a control connection that is electrically coupled to an output of the control circuit to excite an oscillation in the oscillating circuit via a DC voltage.
    Type: Grant
    Filed: June 19, 2006
    Date of Patent: October 11, 2011
    Assignee: Austriamicrosystems AG
    Inventor: Andreas Fitzi
  • Patent number: 8013660
    Abstract: An arrangement for charge integration comprises a charge-generating circuit (2) that provides a charge-dependent signal, and a coupling circuit (20) comprising a first and a second transistor (T1, T2). The first transistor (T1) can be controlled in dependence on the charge-dependent signal. The second transistor (T2) is configured to forward the charge-dependent signal in dependence on a control signal provided by the first transistor (T1). The forwarded charge-dependent signal is integrated by an integrator (30).
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: September 6, 2011
    Assignee: austriamicrosystems AG
    Inventor: Andreas Fitzi
  • Patent number: 7999627
    Abstract: A resonant circuit arrangement is for generating an amplitude-shift-keyed and/or phase-shift-keyed signal. The resonant circuit arrangement includes a capacitive storage element having a first terminal and a second terminal. The first terminal is electrically connectable to a control voltage and the second terminal is electrically connected to a reference potential. The resonant circuit arrangement also includes an inductive storage element having a third terminal and a fourth terminal, where the third terminal is electrically connectable to the reference potential, a first switch for electrically connecting the fourth terminal to the reference potential, a second switch for electrically connecting the fourth terminal and the first terminal, and a control unit for driving the first and second switches based on transmission data.
    Type: Grant
    Filed: September 23, 2005
    Date of Patent: August 16, 2011
    Assignee: Austriamicrosystems AG
    Inventors: Richard Forsyth, Andreas Fitzi
  • Publication number: 20100164594
    Abstract: An arrangement for charge integration comprises a charge-generating circuit (2) that provides a charge-dependent signal, and a coupling circuit (20) comprising a first and a second transistor (T1, T2). The first transistor (T1) can be controlled in dependence on the charge-dependent signal. The second transistor (T2) is configured to forward the charge-dependent signal in dependence on a control signal provided by the first transistor (T1). The forwarded charge-dependent signal is integrated by an integrator (30).
    Type: Application
    Filed: November 28, 2007
    Publication date: July 1, 2010
    Applicant: Austriamicrosystems AG
    Inventor: Andreas Fitzi
  • Publication number: 20100085103
    Abstract: An arrangement for charge integration comprises an input (1) for the provision of a charge-dependent signal and an integrator (30) to integrate a signal present at its input. In addition, a coupling circuit (20) that can adopt at least two operating states is provided to couple the input (1) to the integrator (30) which has a temperature-dependent coupling characteristic. A correction circuit (10) that can be operated by a clock signal is coupled to the input (1) in order to transfer a quantity of charge, and has a temperature characteristic that is derived from the coupling characteristic of the coupling circuit (20).
    Type: Application
    Filed: November 28, 2007
    Publication date: April 8, 2010
    Applicant: austriamicrosystems AG
    Inventor: Andreas Fitzi
  • Publication number: 20100033994
    Abstract: Circuitry includes an acquiring circuit to acquire period and phase information of an oscillation. The acquiring circuit includes a first input electrically coupled to a first connection and a second input electrically coupled to a second connection. The first connection and the second connection are for electrically coupling to an oscillating circuit. A control circuit includes a first input electrically coupled to an output of the acquiring circuit. The control circuit includes a second input electrically coupled to a third connection for supply of a voltage that is based on the rectified voltage. A switch includes a controlled segment for electrically coupling a fourth connection to a reference potential connection, and a control connection that is electrically coupled to an output of the control circuit to excite an oscillation in the oscillating circuit via a DC voltage.
    Type: Application
    Filed: June 19, 2006
    Publication date: February 11, 2010
    Inventor: Andreas Fitzi
  • Publication number: 20070279142
    Abstract: Resonant circuit arrangement, method for operating such a resonant circuit arrangement, and use of the latter A resonant circuit arrangement for generating an Amplitude-shift-keyed and/or frequency-shift-keyed Signal comprises a capacitive storage element (1) and an inductive storage element (2). A first terminal (11) of the capacitive storage element (1) is connected to a terminal for providing a control voltage and a second terminal (12) is connected to a terminal for a reference potential (Vss). A first terminal (21) of the inductive storage element (2) is connected or can be connected to a terminal for the reference potential (Vss). In addition, provision is made of a first switch (3) which can be used to connect a second terminal (22) of the inductive storage element (2) to a terminal for the reference potential (Vss), and a second switch (4) which can be used to connect the second terminal (22) of the inductive storage element (2) to the first terminal (11) of the capacitive storage element (1).
    Type: Application
    Filed: September 23, 2005
    Publication date: December 6, 2007
    Inventors: Richard Forsyth, Andreas Fitzi