Patents Represented by Attorney William K. Bucher
  • Patent number: 8332172
    Abstract: A digitizing instrument is used for modifying pattern data and jitter and noise components of a communication signal. In a typical implementation, the midpoints of a rising edge slope and horizontal portion of the communication signal are determined and multiple digital data records are acquired at the midpoints. The data sample records are transformed to frequency components and the random jitter and noise, and periodic jitter and noise components are determined. A correlated pattern data and the jitter and noise components are matrix elements in a simulated signal channel having communication system elements. Each correlated pattern data and jitter and noise component may be modified for each of the communication system element. The selectively modified correlated pattern data and jitter and noise components are combined to produce a modified communication signal that is displayed as a numeric table, eye diagram or bit error rate presentation.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: December 11, 2012
    Assignee: Tektronix, Inc.
    Inventors: Maria Agoston, Ronald M. Henricksen, Pavel R. Zivny
  • Patent number: 8327206
    Abstract: A blanking primitive masking circuit has a detection and handling circuit that receives data containing blanking primitives. The detection and handling circuit generates a dynamic blanking signal when blanking primitives are detected. The received data is delayed and provided to a pattern detector that generates a synchronization signal provided to a memory and a phase sync signal provided to the detection and handling circuit and to a comparator. The comparator receives reference data from the memory, the delayed data, and the dynamic blanking signal. The comparator compares the reference data with the delayed data and generates bit error outputs from mismatched reference data bits and delayed data bits when the dynamic blanking signal from the detection and handling circuit is absent and suppressing the generation bit error outputs when the blanking primitive are in the delay data and the dynamic blanking signal is present.
    Type: Grant
    Filed: April 30, 2010
    Date of Patent: December 4, 2012
    Assignee: Tektronix, Inc.
    Inventor: Que T. Tran
  • Patent number: 8325867
    Abstract: Waveform data of selected bits having jitter or noise is generated wherein the waveform date represents a serial digital signal. A signal generator displays a jitter/noise setting area and a bit selection area on a display device where jitter or noise is set and the jitter or noise settings are applied to only the bit selected with the bit selection area. The bit is selected through various ways. A user may directly input a bit pattern to be selected. Box objects corresponding to the respective bits in the digital signal may be displayed and one or more of the bits can be selected by selecting one of the box objects. Frequently used bit patterns may be stored and provided using a menu-driven interface for selecting a bit pattern. An arbitrary number of consecutive bits may be designated for receiving jitter or noise and displayed.
    Type: Grant
    Filed: September 26, 2008
    Date of Patent: December 4, 2012
    Assignee: Tektronix, Inc.
    Inventor: Toshiaki Obata
  • Patent number: 8278940
    Abstract: A signal acquisition system has a signal acquisition probe having probe tip circuitry coupled to a resistive center conductor signal cable. The resistive center conductor signal cable is coupled to a compensation system in a signal processing instrument via an input node and input circuitry in the signal processing instrument. The signal acquisition probe and the signal processing instrument have mismatched time constants at the input node with the compensation system having an input amplifier with feedback loop circuitry and a compensation digital filter providing pole-zero pairs for maintaining flatness over the signal acquisition system frequency bandwidth.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: October 2, 2012
    Assignee: Tektronix, Inc.
    Inventors: Josiah A. Bartlett, Ira G. Pollock, Daniel G. Knierim, Lester L. Larson, Scott R. Jansen, Kenneth P. Dobyns
  • Patent number: D663272
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: July 10, 2012
    Assignee: Tektronix, Inc.
    Inventors: J. Steven Lyford, Robert R. Kreitzer
  • Patent number: D663636
    Type: Grant
    Filed: April 22, 2011
    Date of Patent: July 17, 2012
    Assignee: Tektronix, Inc.
    Inventors: Kenneth P. Dobyns, Gary J. Waldo, Robert R. Kreitzer
  • Patent number: D663690
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: July 17, 2012
    Assignee: Tektronix, Inc.
    Inventors: J. Steven Lyford, Robert R. Kreitzer
  • Patent number: D664458
    Type: Grant
    Filed: April 22, 2011
    Date of Patent: July 31, 2012
    Assignee: Tektronix, Inc.
    Inventors: Robert R. Kreitzer, Kenneth P. Dobyns, Gary J. Waldo
  • Patent number: D668225
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: October 2, 2012
    Assignee: Tektronix, Inc.
    Inventors: J. Steven Lyford, Robert R. Kreitzer, Preston S. Gabel, Kenneth P. Dobyns
  • Patent number: D668226
    Type: Grant
    Filed: December 30, 2010
    Date of Patent: October 2, 2012
    Assignee: Tektronix, Inc.
    Inventors: J. Steven Lyford, Robert R. Kreitzer
  • Patent number: D671021
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: November 20, 2012
    Assignee: Tektronix, Inc.
    Inventors: Kenneth P. Dobyns, Gary J. Waldo, Robert R. Kreitzer
  • Patent number: D672718
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: December 18, 2012
    Assignee: Tektronix, Inc.
    Inventors: J. Steven Lyford, Robert R. Kreitzer
  • Patent number: D672719
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: December 18, 2012
    Assignee: Tektronix, Inc.
    Inventors: J. Steven Lyford, Robert R. Kreitzer
  • Patent number: D672720
    Type: Grant
    Filed: April 9, 2012
    Date of Patent: December 18, 2012
    Assignee: Tektronix, Inc.
    Inventors: J. Steven Lyford, Robert R. Kreitzer
  • Patent number: D672721
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: December 18, 2012
    Assignee: Tektronix, Inc.
    Inventors: Robert R. Kreitzer, Kevin C. Ayers, Marc A. Gessford, Jim L. Martin, J. Steven Lyford
  • Patent number: D672722
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: December 18, 2012
    Inventors: Robert R. Kreitzer, Kevin C. Ayers, Marc A. Gessford, Jim L. Martin, J. Steven Lyford
  • Patent number: D672723
    Type: Grant
    Filed: June 4, 2012
    Date of Patent: December 18, 2012
    Assignee: Tektronix, Inc.
    Inventors: Robert R. Kreitzer, Kevin C. Ayers, Marc A. Gessford, Jim L. Martin, J. Steven Lyford
  • Patent number: D673119
    Type: Grant
    Filed: April 6, 2012
    Date of Patent: December 25, 2012
    Assignee: Tektronix, Inc.
    Inventors: J. Steven Lyford, Robert R. Kreitzer, Preston S. Gabel, Kenneth P. Dobyns
  • Patent number: D673120
    Type: Grant
    Filed: April 6, 2012
    Date of Patent: December 25, 2012
    Assignee: Tektronix, Inc.
    Inventors: J. Steven Lyford, Robert R. Kreitzer, Preston S. Gabel, Kenneth P. Dobyns
  • Patent number: D673121
    Type: Grant
    Filed: April 6, 2012
    Date of Patent: December 25, 2012
    Assignee: Tektronix, Inc.
    Inventors: J. Steven Lyford, Robert R. Kreitzer, Preston S. Gabel, Kenneth P. Dobyns