Patent ID: 6778017
Filing Date: 2004-08-17
Classification: H03F

Abstract:
An amplifier comprising:a plurality of gain stages, each of the gain stages having at least a parasitic capacitance associated therewith and characterized by a corresponding transfer function; and at least one passive network, having a circuit topology characterized by component values, coupled between two of the gain stages, or input or output of, one stage, such that the parasitic capacitance associated with at least one of the gain stages is included as part of the circuit topology of the network, the network having the component values chosen to provide the transfer function of the one gain stage with an enhanced bandwidth as compared to the transfer function of the one gain stage as limited by the parasitic capacitance associated therewith, the enhanced bandwidth provided by absorbing the parasitic capacitance associated with the gain stage into the circuit topology so that the gain stage has infinite bandwidth and so that frequency dependent performance of the amplifier relies substantially only on the passive network with low sensitivity to component values thereby providing a frequency dependent transfer function which does not take the form of an impedance transfer function and is not Bode-Fano limited.