Patent ID: 7664612
Filing Date: 2010-02-16
Classification: B60R,G01R,G06F

Abstract:
1. A method of processing a signal responsive to a self-impedance of a circuit element, comprising: a. generating first and second complementary voltage signals, wherein said first and second complementary voltage signals comprise respective first and second oscillatory voltage signals having a nominal peak amplitude, and said second oscillatory voltage signal comprises a waveform of said first oscillatory voltage signal shifted in phase by substantially 180 degrees; b. operatively coupling said first complementary voltage signal to a first node of a series circuit; c. operatively coupling said second complementary voltage signal to a fourth node of said series circuit, wherein said series circuit comprises: d. generating an output signal responsive to at least one of a voltage across said first sense resistor and a voltage across said second sense resistor, wherein said output signal is responsive to the self-impedance of said circuit element when said circuit element is connected to said second and third nodes of said series circuit; and e. controlling at least one of said first and second complementary voltage signals responsive to said output signal so as to provide for attenuating at least one noise signal, wherein a frequency of said at least one noise signal is substantially different from a frequency of said first and second complementary voltage signals.