psr without using the ff path 503 the improvement depends on the matching between the feed forward path transfer function a ffp s and the direct path transfer function a dp s fig6 shows a power supply rejection 602 curve versus frequency 601 for the case where the dominant pole of the lvr is placed at the output of the voltage regulator the psr with the ff path 604 is better than the psr without using the ff path 603 the improvement depends on the matching between the feed forward path transfer function a ffp s and the direct path transfer function a dp s in one or more embodiments of the invention any resistive element in the passive ff block 205 can be implemented as either as a physical resistor or as a device emulating a resistive effect fig7 shows three different exemplary implementations 700 of a resistive component which may be a physical resistor 701 a transistor behaving as a resistor 702 whose resistance is controlled by a control voltage 703 or a diode connected device 704 in one or more embodiments of the invention any capacitive element in the passive ff block 205 can be implemented as a physical capacitor or as a device emulating as capacitive effect fig8 shows two different implementations of a capacitive component 800 which can be a physical capacitor 801 or a transistor acting as a capacitor 802 in one or more embodiments the.