Apparatus for and method of synchronous rejection

Details Apparatus for and method of synchronous rejection Apparatus for and method of synchronous rejection

2006-01-17

2006-01-17

Benson, Walter (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Parameter related to the reproduction or fidelity of a...

C324S628000, C455S063100, C455S304000

Reexamination Certificate

active

06987391

ABSTRACT:
Methods of improving a signal to noise ratio using synchronous rejection are enclosed. Also disclosed are various synchronous rejection systems. In one method of synchronous rejection, the method includes correlating a phase of a reference signal to a phase of the interference signal; collecting a first data set during a first period of time using the reference signal; inverting the reference signal and re-correlating the phase of the reference signal to the phase of the interference signal; collecting a second data set during a second period of time using the inverted reference signal; and integrating the first and the second data set.

REFERENCES:
patent: 4772844 (1988-09-01), Andeen et al.
patent: 5276430 (1994-01-01), Granovsky
patent: 6204673 (2001-03-01), Andeen et al.
patent: 6498820 (2002-12-01), Thomson et al.

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