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Judge Stark: Report and Recommendation Regarding Claim Construction

In Power Integrations, Inc. v. Fairchild Semiconductor International, Inc., et al., C.A. No. 08-309-JJF-LPS (D. Del. Dec. 18, 2009), Judge Stark recently construed the following claim terms.

“multi-sampling . . . during an off-time of said switching signal”sampling two or more times during one off-time of the switching signal
“a controller to generate the switching signal and to control the switching signal in response to a first feedback signal associated with a voltage control loop and a second feedback signal associated with a current control loop”a controller to generate the switching signal and to control the switching signal in response to a first feedback signal associated with a voltage control loop and a second feedback signal, distinct from the first feedback signal, associated with a current control loop
“controlling a switching signal to regulate the connection of the electrical power to output terminals in response to a first feedback signal associated with a voltage control loop and a second feedback signal associated with a current control loop”controlling a switching signal to regulate the connection of the electrical power to output terminals in response to a first feedback signal associated with a voltage control loop and a second feedback signal, distinct from the first feedback signal, associated with a current control loop
“sampling a voltage . . . and a discharge time”sampling a voltage from the auxiliary winding of the transformer when the transformer is discharging
“frequency variation signal”an internal signal that cyclically varies in magnitude during a fixed period of time and is used to modulate the frequency of the oscillation signal within a predetermined frequency range
“frequency jittering”varying the switching frequency of a switch mode power supply about a target frequency in order to reduce electromagnetic interference
“means coupled to the control input for varying the switching frequency, including: one or more current sources . . . and a counter”Means-plus function term, with a function of “varying the switching frequency of the oscillator,” and a structure of a digital-to-analog converter and a counter having at least four bits
Power Integrations, Inc. v. Fairchild Semiconductor International, Inc., et al., C.A. No. 08-309-JJF-LPS (D. Del. Dec. 18, 2009)

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