Patents by Inventor John Fagerlund

John Fagerlund 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: 7995622
    Abstract: A method for digital clock smoothing is provided. The method comprises: (A) inputting an asynchronous data stream having an asynchronous symbol rate into a FIFO two-port memory block; (B) obtaining FIFO depth B by subtracting modulo B for each stored symbol a symbol output address from a symbol input address; (C) inputting FIFO depth B into a programmable look-up table (LUT); (D) obtaining a phase detector error signal; (E) scaling the phase detector error signal to obtain a scaled error factor; (F) adding the scaled error factor to a nominal phase step to obtain a phase update; (G) obtaining a smoothed symbol rate; and (H) reading out each output symbol from FIFO under control of an output FIFO address control register at the smoothed symbol rate.
    Type: Grant
    Filed: October 5, 2009
    Date of Patent: August 9, 2011
    Assignee: Wideband Semiconductor, Inc.
    Inventors: Richard John Fagerlund, James P. Flynn, Mark Fong, David Bruce Isaksen
  • Patent number: 7613211
    Abstract: A method for digital clock smoothing comprising: (A) inputting an asynchronous data stream having an asynchronous symbol rate into a two-port memory block; (B) accumulating a plurality of symbols of the asynchronous data stream in the two-port memory block for a predetermined time period; (C) computing an average symbol rate for the input asynchronous data stream; (D) generating a clock error signal equal to the difference between the average symbol rate of the input asynchronous data stream and a nominal output synchronous clock; (E) obtaining a smoothed symbol rate clock by using the error clock signal; and (F) generating an output smoothed data stream having the smoothed symbol rate clock.
    Type: Grant
    Filed: February 18, 2006
    Date of Patent: November 3, 2009
    Assignee: Wideband Semiconductors, Inc.
    Inventors: Richard John Fagerlund, James P. Flynn, Mark Fong, David Bruce Isaksen
  • Patent number: 6482296
    Abstract: The present invention relates to a method for controlling a papermaking machine/board machine/tissue machine or the like, which papermaking machine/board machine/tissue machine or the like includes basic unit assembly groups, such as a headbox, a wire section, a press, a drying section, a coating unit, a finishing machine, etc. The machine control system of the papermaking machine/board machine/tissue machine or the like comprises a central processing unit (e.g. a unit for control room, alarm and other such functions), one or more process control units, and one or more input/output units, which are connected by control cables to the controlled units or actuators. In the method the process control units and/or input/output units of the machine control system are located in a mechanical machine part in connection with basic unit assembly groups of the papermaking machine/board machine/tissue machine or such.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: November 19, 2002
    Assignee: Metso Paper, Inc.
    Inventors: John Fagerlund, Harri Vähätalo
  • Patent number: 6293048
    Abstract: An apparatus and method for supplying an aqueous liquid for plants utilizes a reservoir having inside walls. There is a conduit for discharging the liquid so the liquid flows along walls of the reservoir. There is a cooler for cooling the walls so the liquid flowing along the walls is thereby cooled. For example, the reservoir may comprise a converted chest-type freezer unit. There may be an opening in the walls of the reservoir and the fan located in the opening to direct air into the reservoir and aerate liquid therein.
    Type: Grant
    Filed: June 7, 1999
    Date of Patent: September 25, 2001
    Inventors: Clay Boulter, John Fagerlund
  • Patent number: 6258213
    Abstract: Regulation method in a paper machine for controlling the variation of the basis weight of a paper web in the machine direction in which the basis weight profile of the web is measured by means of a measurement device and a basis weight regulation system receives a signal of the measurement of the basis weight from the measurement device and generates a regulation signal for controlling the flow of thick stock passed into a short circulation circuit in the paper machine by a basis weight valve and/or a regulation pump. The variation of the basis weight in the machine direction in the paper machine is controlled, besides by the short circulation circuit of regulation, also by a substantially faster second circuit of regulation which comprises one or more actuators for controlling the flow rate of the dilution water flow in the dilution profiling system of the headbox and/or the consistency of the dilution water flow across the entire width of the paper web.
    Type: Grant
    Filed: March 5, 1999
    Date of Patent: July 10, 2001
    Assignee: Valmet Corporation
    Inventors: John Fagerlund, Harri Mustonen, Harri Vähätalo
  • Patent number: 5944957
    Abstract: A regulation system and method in a paper machine for controlling the variation of the basis weight of a paper web in the machine direction in which the basis weight profile of the web is measured by means of a measurement device and a basis weight regulation system receives a signal of the measurement of the basis weight from the measurement device and generates a regulation signal for controlling the flow of thick stock passed into a short circulation circuit in the paper machine by a basis weight valve and/or a regulation pump. The variation of the basis weight in the machine direction in the paper machine is controlled, besides by the short circulation circuit of regulation, also by a substantially faster second circuit of regulation which comprises one or more actuators for controlling the flow rate of the dilution water flow in the dilution profiling system of the headbox and/or the consistency of the dilution water flow across the entire width of the paper web.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: August 31, 1999
    Assignee: Valmet Corporation
    Inventors: John Fagerlund, Harri Mustonen, Harri Vahatalo