Signal conditioning to provide optimum gain and noise...

Details Signal conditioning to provide optimum gain and noise... Signal conditioning to provide optimum gain and noise...

2009-03-31

2011-12-13

Lee, Hwa (Department: 2886)

Optics: measuring and testing

By light interference

Rotation rate

Reexamination Certificate

active

08077322

ABSTRACT:
A resonator fiber optic gyroscope includes a first light source configured to generate a light signal. A resonator element is configured to generate an optical signal based on the light signal. A photodetector is configured to generate a first electrical signal based on the optical signal. The first electrical signal includes an oscillating signal, a direct-current (DC) signal, an even-harmonic signal including components at even harmonics of the oscillating signal, and an odd-harmonic signal including components at odd harmonics of the oscillating signal. A filtering element is configured to attenuate the DC signal, at least one even-harmonic component, and an odd-harmonic component to produce a second electrical signal. An amplifier is configured to amplify the second electrical signal. An analog-to-digital converter (ADC) is configured to digitize the amplified second electrical signal.

REFERENCES:
patent: 5469257 (1995-11-01), Blake et al.
patent: 5774216 (1998-06-01), Priddy et al.
patent: 6765678 (2004-07-01), Strandjord et al.

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