Searching over 5,500,000 cases.


searching
Buy This Entire Record For $7.95

Download the entire decision to receive the complete text, official citation,
docket number, dissents and concurrences, and footnotes for this case.

Learn more about what you receive with purchase of this case.

In re Power Integrations, Inc.

United States Court of Appeals, Federal Circuit

March 19, 2018

IN RE: POWER INTEGRATIONS, INC., Appellant

         Appeal from the United States Patent and Trademark Office, Patent Trial and Appeal Board in No. 90/008, 326.

          Howard G. Pollack, Fish & Richardson, PC, Redwood City, CA, argued for appellant. Also represented by Michael R. Headley, Neil Warren; Craig E. Countryman, San Diego, CA; Frank Scherkenbach, Boston, MA.

          Amy J. Nelson, Office of the Solicitor, United States Patent and Trademark Office, Alexandria, VA, argued for appellee Andrei Iancu. Also represented by Nathan K. Kelley, Thomas W. Krause, Molly R. Silfen.

          Before Moore, Mayer, and Stoll, Circuit Judges.

          MAYER, CIRCUIT JUDGE

         Power Integrations, Inc. ("Power Integrations") appeals the remand decision of the Patent Trial and Appeal Board ("board") rejecting claims 1, 17, 18, and 19 of U.S. Patent No. 6, 249, 876 ("the '876 patent") as anticipated. See In re Power Integrations, Inc., No. 90/008, 326, 2016 Pat. App. LEXIS 11870 (P.T.A.B. Oct. 4, 2016) ("Remand Decision"). Because the board's anticipation rejections were based on an unreasonably broad claim construction, we reverse.

         I. Background

         A. The '876 Patent

         The '876 patent is entitled "Frequency Jittering Control for Varying the Switching Frequency of a Power Supply." It describes a technique for reducing electromagnetic interference ("EMI") noise "by jittering the switching frequency of a switched mode power supply." '876 patent, col.1 ll.66-67. Claim 1, as amended, recites:

A digital frequency jittering circuit for varying the switching frequency of a power supply, comprising:
an oscillator for generating a signal having a switching frequency, the oscillator having a control input for varying the switching frequency;
a digital to analog converter coupled to the control input for varying the switching frequency; and
a counter coupled to the output of the oscillator, the digital to analog converter coupled to the counter, the counter causing the digital to analog converter to adjust the control input and to vary the switching frequency of the power supply.

J.A. 817.

         Claims 17 and 19 relate to a method for varying the switching frequency using a varying voltage to control the oscillator. Independent claim 17, as amended, requires "cycling a counter" to generate a secondary voltage that varies over time:

A method for generating a switching frequency in a power conversion system, comprising:
generating a primary voltage;
cycling a counter coupled to one or more secondary voltage sources to generate a secondary voltage which ...

Buy This Entire Record For $7.95

Download the entire decision to receive the complete text, official citation,
docket number, dissents and concurrences, and footnotes for this case.

Learn more about what you receive with purchase of this case.