Patents by Inventor Mark Spaeth

Mark Spaeth 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: 10396803
    Abstract: A clock and data recovery (CDR) circuit operates to recover a clock and sample data from full-rate and sub-rate data signals. The CDR circuit selectively shifts one or more of the sampling clocks based on the rate of a received data signal, facilitating accurate sampling of sub-rate data signals. A masking circuit selectively masks data output bits clocked by a selection of the sampling clocks, thereby outputting relevant sampled data.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: August 27, 2019
    Assignee: Marvell International Ltd.
    Inventors: Scott E. Meninger, Ethan Crain, Mark Spaeth
  • Publication number: 20190214997
    Abstract: A clock and data recovery (CDR) circuit operates to recover a clock and sample data from full-rate and sub-rate data signals. The CDR circuit selectively shifts one or more of the sampling clocks based on the rate of a received data signal, facilitating accurate sampling of sub-rate data signals. A masking circuit selectively masks data output bits clocked by a selection of the sampling clocks, thereby outputting relevant sampled data.
    Type: Application
    Filed: October 19, 2018
    Publication date: July 11, 2019
    Inventors: Scott E. Meninger, Ethan Crain, Mark Spaeth
  • Patent number: 10141949
    Abstract: Modular serializer and deserializer circuits convert a data input in a variety of applications. The serializer includes an array of cells that receive a parallel data input and transfer the word, row by row, to an output buffer that generates a corresponding serial data output. The deserializer includes an input buffer that receives a serial data input and transfers partial words sequentially through an array of cells. When the word fully occupies the cells, the array transmits the word as a parallel data output. A modular clock operates to clock the modular serializer and deserializer.
    Type: Grant
    Filed: November 7, 2017
    Date of Patent: November 27, 2018
    Assignee: Cavium, LLC
    Inventor: Mark Spaeth
  • Patent number: 8536944
    Abstract: A programmable current driver provides de-emphasis capability. A number of identical transmitter slices, consisting of a unit current source and a unit differential pair, are connected in parallel to the termination resistors. As the transmitter slices are identical, the current density through the differential pairs are identical, and the VDS voltages across them (as well as the VDS voltages across the unit current sources) are the same, ensuring that the current through each slice is identical (within the limits of device matching). Biasing circuitry ensures that each unit current source sinks a current having a fixed proportion to the total current.
    Type: Grant
    Filed: February 15, 2012
    Date of Patent: September 17, 2013
    Assignee: Cavium, Inc.
    Inventor: Mark Spaeth
  • Publication number: 20120206200
    Abstract: A programmable current driver provides de-emphasis capability. A number of identical transmitter slices, consisting of a unit current source and a unit differential pair, are connected in parallel to the termination resistors. As the transmitter slices are identical, the current density through the differential pairs are identical, and the VDS voltages across them (as well as the VDS voltages across the unit current sources) are the same, ensuring that the current through each slice is identical (within the limits of device matching). Biasing circuitry ensures that each unit current source sinks a current having a fixed proportion to the total current.
    Type: Application
    Filed: February 15, 2012
    Publication date: August 16, 2012
    Applicant: Cavium, Inc.
    Inventor: Mark Spaeth