Coded data generation or conversion – Analog to or from digital conversion – Analog to digital conversion
Reexamination Certificate
2006-10-24
2006-10-24
Barnie, Rexford (Department: 2819)
Coded data generation or conversion
Analog to or from digital conversion
Analog to digital conversion
C341S132000, C324S207130, C324S207180
Reexamination Certificate
active
07126521
ABSTRACT:
A two-dimensional all-digital ratiometric decoder to analyze signals representative of state changes in a closed loop control system. In one embodiment, the two-dimensional digital ratiometric decoder comprises at least one selector circuit, a summation circuit, a difference circuit and a divider circuit. The at least one selector circuit is adapted to select the signals to be processed by alternating between the signals representative of the X dimension and the signals representative of the Y dimension. The summation circuit is adapted to add the amplitude magnitudes of the signals selected. The difference circuit is adapted to obtain the difference between the amplitude magnitudes of the signals selected. The divider circuit is adapted to divide the output of the difference circuit by the output of the summation circuit to produce a quotient proportional to the physical change of the object being controlled.
REFERENCES:
patent: 4678991 (1987-07-01), Schmidt
patent: 4982156 (1991-01-01), Lewis et al.
patent: 5194865 (1993-03-01), Mason et al.
patent: 6359578 (2002-03-01), Gee et al.
Barnie Rexford
Fogg and Associates LLC
Lundberg Scott V.
Nguyen Khai M.
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