Patents by Inventor Christopher R. Leon

Christopher R. Leon 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: 8521115
    Abstract: An integrated circuit including a Phase Locked Loop (PLL) configured for use with a continuous stream receiver is disclosed. A control voltage line is configured to deliver a control voltage with a capacitive load delivered by a capacitor array to the control voltage based upon an add signal and a subtract signal. A threshold generator generates a high threshold voltage and a low threshold voltage using and including at least one process dependent resistor and at least two temperature and process dependent current sources. The PLL responds during calibration to the control voltage being above the high threshold voltage by asserting the add signal directing the capacitor array to increase the capacitive load on the control voltage line, and to the control voltage being below the low threshold voltage by asserting the subtract signal to decrease the capacitive load.
    Type: Grant
    Filed: February 9, 2012
    Date of Patent: August 27, 2013
    Assignee: QUALCOMM Incorporated
    Inventor: Christopher R. Leon
  • Patent number: 8350600
    Abstract: A glitchless clock multiplexer controlled by an asynchronous select signal for use in GPS receivers is disclosed. A device in accordance with the present invention comprises a device for producing a clock signal, the clock signal being selected from a plurality of asynchronous frequency sources.
    Type: Grant
    Filed: November 10, 2005
    Date of Patent: January 8, 2013
    Assignee: QUALCOMM Incorporated
    Inventor: Christopher R. Leon
  • Patent number: 8203393
    Abstract: A voltage controlled oscillator having a temperature and process controlled output. A VCO in accordance with the present invention comprises a reference current source, a fixed current source, coupled in series with the reference current source, the fixed current source comprising a temperature independent current source, a third current source, coupled in parallel with the combination of the reference current source and the fixed current source, and an oscillator, coupled in series with the third current source, wherein a current used to control the oscillator is based on operating temperatures and processes of the reference current source and the third current source.
    Type: Grant
    Filed: November 17, 2008
    Date of Patent: June 19, 2012
    Assignee: QUALCOMM Atheros, Inc.
    Inventor: Christopher R. Leon
  • Publication number: 20120139594
    Abstract: An integrated circuit including a Phase Locked Loop (PLL) configured for use with a continuous stream receiver is disclosed. A control voltage line is configured to deliver a control voltage with a capacitive load delivered by a capacitor array to the control voltage based upon an add signal and a subtract signal. A threshold generator generates a high threshold voltage and a low threshold voltage using and including at least one process dependent resistor and at least two temperature and process dependent current sources. The PLL responds during calibration to the control voltage being above the high threshold voltage by asserting the add signal directing the capacitor array to increase the capacitive load on the control voltage line, and to the control voltage being below the low threshold voltage by asserting the subtract signal to decrease the capacitive load.
    Type: Application
    Filed: February 9, 2012
    Publication date: June 7, 2012
    Applicant: Qualcomm Atheros, Inc.
    Inventor: Christopher R. Leon
  • Patent number: 8140040
    Abstract: An integrated circuit including a Phase Locked Loop (PLL) configured for use with a continuous stream receiver is disclosed. A control voltage line is configured to deliver a control voltage with a capacitive load delivered by a capacitor array to the control voltage based upon an add signal and a subtract signal. A threshold generator generates a high threshold voltage and a low threshold voltage using and including at least one process dependent resistor and at least two temperature and process dependent current sources. The PLL responds during calibration to the control voltage being above the high threshold voltage by asserting the add signal directing the capacitor array to increase the capacitive load on the control voltage line, and to the control voltage being below the low threshold voltage by asserting the subtract signal to decrease the capacitive load.
    Type: Grant
    Filed: September 11, 2009
    Date of Patent: March 20, 2012
    Assignee: Qualcomm Atheros, Inc
    Inventor: Christopher R. Leon
  • Patent number: 7471152
    Abstract: A tuned low-noise amplifier is disclosed. A device in accordance with the present invention comprises a first current source, a second current source, a comparator, coupled to the first current source and the second current source, for providing a control signal, and a third current source, receiving the control signal and coupled to the tuned low-noise amplifier, wherein a current in the third current source is proportional to a current in the first current source and the second current source, where values of the first current source, the second current source, and the third current source are based on a quasi-Proportional-To-Absolute-Temperature (PTAT) curve.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: December 30, 2008
    Assignee: Atheros Technology Ltd.
    Inventors: Lloyd Jian-Le Jiang, Rabih Makarem, Kwai-Kwong K. Lam, Christopher R. Leon
  • Publication number: 20080094108
    Abstract: A glitchless clock multiplexer controlled by an asynchronous select signal for use in GPS receivers is disclosed. A device in accordance with the present invention comprises a device for producing a clock signal, the clock signal being selected from a plurality of asynchronous frequency sources.
    Type: Application
    Filed: November 10, 2005
    Publication date: April 24, 2008
    Inventor: Christopher R. Leon
  • Patent number: 6798263
    Abstract: A differential latch circuit with a differential reset function includes a first arrangement of transistors configured to perform a latch function and a second arrangement of transistors, connected to the first arrangement of transistors, configured to perform a reset function. The first arrangement of transistors includes branches having three cascoded transistors, and the second arrangement of transistors includes branches having two cascoded transistors. This configuration enables the latch circuit to use lower power supply voltages relative to conventional latch circuits that require four more cascoded transistors.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: September 28, 2004
    Assignee: Applied Micro Circuits Corporation
    Inventor: Christopher R. Leon