Court construes patents directed to switching power supply regulators

 Fairchild Semiconductor Corporation, et al. v. Power Integrations, Inc., C.A. No. 12-540- LPS, August 28, 2013.

Stark, J.  Claim construction opinion.

 The parties completed claim construction briefing on May 24, 2013.  A Markman hearing was held on July 15, 2013.  The parties disputed the following claim terms:

 

“a second feedback signal associated with a current control loop;”

“generates the first feedback signal by sampling . . .;”

“means for regulating the power supply system;”

“the control circuit and the feedback circuit are operable to regulate;”

“the feedback circuit operable to support regulation by the control circuit;”

“generating a LED current for controlling the LED;”

“a sense terminal of the control circuit, coupled to the LED for detecting a LED voltage, wherein the LED voltage is coupled for adjusting the LED current;”

“a soft start circuit means;”

“an oscillator that provides a maximum duty cycle signal comprising an on-state and an off-state;”

“a control circuit coupled to an input of a power converter;”

“when the electrical energy source is uncoupled from the input of the power converter;”

“a capacitance coupled between input terminals of the input of the power converter;”

“render dormant the drive signal generator;”

“power up the drive signal generator;”

“current input circuit;”

“current limit;”

“current limit adjustment signal;” and

“dynamically adjust a current limit.”

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