Components having actively controlled circuit elements
First Claim
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1. Apparatus for providing a filtering function to an external circuit comprisinga controlled element,a control element adapted to control an average voltage across the controlled element as a function of variations in a signal that is to be filtered and a requirement for providing the filtering function.
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Abstract
Protection and filtering functions are provided for external circuits by internal circuits that use controlled elements.
30 Citations
26 Claims
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1. Apparatus for providing a filtering function to an external circuit comprising
a controlled element, a control element adapted to control an average voltage across the controlled element as a function of variations in a signal that is to be filtered and a requirement for providing the filtering function.
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11. A method comprising
sensing variations in a signal that is to be filtered; - and
adaptively setting an average voltage across a series pass element in an active filter based upon the sensed variations and a requirement for providing a filtering function. - View Dependent Claims (12, 13, 14, 15)
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16. Apparatus comprising
a filter circuit including a controlled element connected in series between an input connection and an output connection, circuitry adapted to provide a filtering function, and a control circuit adapted to sense variations in a signal that is to be filtered and to control an average voltage across the controlled element as a control function of the variations and of a requirement for providing the filtering function.
Specification