Patents by Inventor Andrew M. Jordan

Andrew M. Jordan 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).

  • Patent number: 9362874
    Abstract: An apparatus comprises a differential amplifier circuit and a current source. The differential amplifier circuit is configured to receive a voltage at an input, wherein the differential amplifier circuit generates an output voltage having a magnitude proportional to the received voltage over a voltage range to be measured at a specified output common mode voltage. The current source is electrically connected to an input of the differential amplifier circuit and is configured to subtract a midpoint of a voltage range of the battery voltage to be measured at the input of the differential amplifier, wherein a circuit supply voltage provided to the differential amplifier circuit and the current source is less than the voltage at the input.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: June 7, 2016
    Assignee: FAIRCHILD SEMICONDUCTOR CORPORATION
    Inventors: Hrvoje Jasa, Andrew M. Jordan
  • Patent number: 9014399
    Abstract: This document discusses, among other things, systems and methods to at least partially compensate for temperature sensitivity in a digital microphone system including, for example, a temperature sensitive membrane, such as an electrets condenser microphone (ECM).
    Type: Grant
    Filed: March 9, 2012
    Date of Patent: April 21, 2015
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Hrvoje Jasa, Andrew M. Jordan
  • Publication number: 20150015333
    Abstract: An apparatus comprises a differential amplifier circuit and a current source. The differential amplifier circuit is configured to receive a voltage at an input, wherein the differential amplifier circuit generates an output voltage having a magnitude proportional to the received voltage over a voltage range to be measured at a specified output common mode voltage. The current source is electrically connected to an input of the differential amplifier circuit and is configured to subtract a midpoint of a voltage range of the battery voltage to be measured at the input of the differential amplifier, wherein a circuit supply voltage provided to the differential amplifier circuit and the current source is less than the voltage at the input.
    Type: Application
    Filed: May 30, 2014
    Publication date: January 15, 2015
    Applicant: Fairchild Semiconductor Corporation
    Inventors: Hrvoje Jasa, Andrew M. Jordan
  • Patent number: 8829991
    Abstract: This document discusses, among other things, an amplifier circuit including first and second amplifiers configured to receive an input signal and to provide a differential output signal using a feedback loop including a transconductance amplifier. A non-inverting input of a first amplifier can be configured to receive an input signal. The feedback loop can be configured to receive the outputs from the first and second amplifiers and to provide a feedback signal to the non-inverting input of the second amplifier, for example, to reduce a DC offset error or to increase a dynamic range of the amplifier circuit.
    Type: Grant
    Filed: January 13, 2012
    Date of Patent: September 9, 2014
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Andrew M. Jordan, Hrvoje Jasa
  • Patent number: 8598913
    Abstract: This document discusses, among other things, apparatus and methods for controlling a hysteresis range of a voltage comparator. In an example, an apparatus can include an amplifier having a temperature dependency, a comparator configured to receive first and second currents and to provide an output voltage indicative of a hysteretic comparison of the first and second input voltages, wherein a range of hysteresis of the apparatus is controlled over a range of temperatures. In an example, the amplifier can be configured to receive first and second input voltages and to provide the first and second currents.
    Type: Grant
    Filed: November 22, 2011
    Date of Patent: December 3, 2013
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Tyler Daigle, Andrew M. Jordan
  • Patent number: 8536924
    Abstract: Apparatus and methods for an integrated circuit, high-impedance network are provided. In an example, the network can include an anti-parallel diode pair coupled between first and second nodes. The anti-parallel diode pair can include a first diode including a P+/NWELL junction and a second diode including N+/PWELL junction. In an example, the first diode and the second diode can include a common substrate.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: September 17, 2013
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Andrew M. Jordan, Hrvoje Jasa, Steven M. Waldstein
  • Publication number: 20120230500
    Abstract: This document discusses, among other things, systems and methods to at least partially compensate for temperature sensitivity in a digital microphone system including, for example, a temperature sensitive membrane, such as an electrets condenser microphone (ECM).
    Type: Application
    Filed: March 9, 2012
    Publication date: September 13, 2012
    Inventors: Hrvoje Jasa, Andrew M. Jordan
  • Patent number: 8248164
    Abstract: Apparatus and methods for an integrated circuit, single ended-to-differential amplifier are provided. In an example, the amplifier can include an amplifier circuit having a first input configured to receive a single-ended signal, a second input, and a differential output configured to provide an amplified representation of the single-ended signal. The amplifier can include a filter circuit configured to balance a common-mode voltage between the first and second inputs of the amplifier circuit. The filter circuit can include a common-mode input configured to receive the common-mode voltage, a first impedance network coupled between the common-mode input and the first input of the amplifier circuit, and a second impedance network coupled between the common-mode input and the second input of the amplifier circuit. The filter circuit can provide a low frequency pole below 1 hertz.
    Type: Grant
    Filed: September 2, 2010
    Date of Patent: August 21, 2012
    Assignee: Fairchild Semiconductor Corporation
    Inventors: Andrew M. Jordan, Hrvoje Jasa
  • Publication number: 20120182068
    Abstract: This document discusses, among other things, an amplifier circuit including first and second amplifiers configured to receive an input signal and to provide a differential output signal using a feedback loop including a transconductance amplifier. A non-inverting input of a first amplifier can be configured to receive an input signal. The feedback loop can be configured to receive the outputs from the first and second amplifiers and to provide a feedback signal to the non-inverting input of the second amplifier, for example, to reduce a DC offset error or to increase a dynamic range of the amplifier circuit.
    Type: Application
    Filed: January 13, 2012
    Publication date: July 19, 2012
    Inventors: Andrew M. Jordan, Hrvoje Jasa
  • Publication number: 20120126855
    Abstract: This document discusses, among other things, apparatus and methods for controlling a hysteresis range of a voltage comparator. In an example, an apparatus can include an amplifier having a temperature dependency, a comparator configured to receive first and second currents and to provide an output voltage indicative of a hysteretic comparison of the first and second input voltages, wherein a range of hysteresis of the apparatus is controlled over a range of temperatures. In an example, the amplifier can be configured to receive first and second input voltages and to provide the first and second currents.
    Type: Application
    Filed: November 22, 2011
    Publication date: May 24, 2012
    Inventors: Tyler Daigle, Andrew M. Jordan
  • Publication number: 20120056668
    Abstract: Apparatus and methods for an integrated circuit, high-impedance network are provided. In an example, the network can include an anti-parallel diode pair coupled between first and second nodes. The anti-parallel diode pair can include a first diode including a P+/NWELL junction and a second diode including N+/PWELL junction. In an example, the first diode and the second diode can include a common substrate.
    Type: Application
    Filed: September 2, 2010
    Publication date: March 8, 2012
    Inventors: Andrew M. Jordan, Hrvoje Jasa, Steven M. Waldstein
  • Publication number: 20120056671
    Abstract: Apparatus and methods for an integrated circuit, single ended-to-differential amplifier are provided. In an example, the amplifier can include an amplifier circuit having a first input configured to receive a single-ended signal, a second input, and a differential output configured to provide an amplified representation of the single-ended signal. The amplifier can include a filter circuit configured to balance a common-mode voltage between the first and second inputs of the amplifier circuit. The filter circuit can include a common-mode input configured to receive the common-mode voltage, a first impedance network coupled between the common-mode input and the first input of the amplifier circuit, and a second impedance network coupled between the common-mode input and the second input of the amplifier circuit. The filter circuit can provide a low frequency pole below 1 hertz.
    Type: Application
    Filed: September 2, 2010
    Publication date: March 8, 2012
    Inventors: Andrew M. Jordan, Hrvoje Jasa