Dynamic amplifier circuit
AssigneeU.S. Philips Corporation
InventorArthur H. M. Van Roermund
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Abstract
A dynamic amplifier circuit, specifically for switched-capacitor filters, having a current source which supplies an exponentially-decreasing bias current. In addition, a current source is included for supplying an additional bias current in order to define the minimum bias current in the amplifier circuit.
Claims2
A dynamic amplifier circuit for amplifying a signal in a first time interval under control of a clock signal, which circuit comprises a bias circuit for obtaining a bias current in the amplifier circuit during said first time interval, which bias current decreases from an initial value, characterized in that the bias circuit comprises an additional source for obtaining a current in the amplifier circuit, which current is substantially constant relative to said bias current and has a comparatively small value relative to the said initial value in order to define the minimum bias current in the amplifier circuit at the end of said time interval.
Dependencies are inferred from the claim text.