Patent ID: 8497730

Claim:
An apparatus, comprising: a first passive element having an impedance; an active circuit configured to receive an impedance signal associated with the impedance, the impedance includes a real portion and an imaginary portion, wherein the active circuit is configured to increase or decrease the real portion or the imaginary portion of the impedance signal, wherein the active circuit is configured to amplify the impedance signal to provide a first amplified signal, wherein the active circuit includes a second passive element having a resistance, inductance or capacitance related to the real portion or the imaginary portion, wherein the active circuit is configured to provide a second amplified signal associated with the second passive element, wherein the active circuit is configured to combine the first amplified signal and the second amplified signal to provide a combined signal, wherein the combined signal increases or decreases the real portion or the imaginary portion of the impedance signal by at least partially removing or augmenting the real portion or the imaginary portion of the impedance signal.