Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2005-11-22
2005-11-22
Sterrett, Jeffrey (Department: 2838)
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
C363S021120, C363S097000
Reexamination Certificate
active
06967472
ABSTRACT:
A regulator circuit maintaining an approximate constant current output characteristic. In one aspect, a disclosed regulator controls a switch that has a current limit threshold. A supply terminal and feedback terminal of the regulator are connected together as a control terminal such that a shunt regulator current is the control terminal current in excess of the internal supply current consumed by the regulator. The current limit threshold of the switch is changed as a function of the shunt regulator current. In another aspect, a control input of the regulator circuit receives a current that is the sum of the internal supply current consumed by the regulator circuit and a feedback current. The feedback current is a fraction of the consumption current of the regulator circuit and the current limit threshold of the switch is changed as a function of the feedback current.
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Leman, B. R., “Three-Terminal Power IC Cuts Off-Line Flyback Switcher Size and Cost,” Power Integrations, Inc., Mountain View, California, PCIM, (Aug. 1995), pp. 15-28.
Balakrishnan Balu
Bircan Erdem
Djenguerian Alex B.
Hugh Matthews David Michael
Wong Kent
Blakely , Sokoloff, Taylor & Zafman LLP
Power Integrations, Inc.
Sterrett Jeffrey
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