FEEDFORWARD ACTIVE DECOUPLING

摘要

Apparatus and methods are provided to compensate for parasitic inductances and resistance (such as from package bonding wires) that affect current in duty cycle systems, such as low noise amplifiers (LNAs), that have large varying current consumption. A boost circuit supplies current from a supply VBSTDC to compensate for voltage changes due to a package inductance 204 and resistive voltage drops. To accomplish this, a replica circuit (i.e., transistor Q2) is able to source a current from current source 206-1 (which can be a generally constant current source) that is a replica IRPL of the current ICKT sourced by the input circuit (i.e., LNA 108).