Resolution of ambiguities in counts contained in overlapping bit

Details Resolution of ambiguities in counts contained in overlapping bit Resolution of ambiguities in counts contained in overlapping bit

1976-06-25

1977-04-12

Thesz, Joseph M.

Registers

Platform operated

Platform actuated traffic counters

235 92PS, 235 92R, 340347AD, G06M 310

Patent

active

040177173

ABSTRACT:
Ambiguities in counts contained in overlapping bit positions of fine and coarse data measurement digital signals that are combined to provide a composite digital signal representative of a measured quantity, such as distance or angle, are resolved by comparing the counts in the most significant overlapping bit position of the fine and coarse data signals and comparing the counts in the next lesser significant overlapping bit positions of the fine and coarse data signals; and by adjusting the count in the non-overlapping more significant bit positions of the coarse data signal in accordance with such comparisons.
The count in the non-overlapping more significant bit positions of the coarse data signal is reduced by one bit when the count in the most significant overlapping bit position of the fine data signal is greater than the count in the most significant overlapping bit position of the coarse data signal, and the count in the next lesser significant bit positions of the fine data signal is greater than the count in the next lesser significant bit positions of the coarse data signal; and the count in the non-overlapping more significant bit positions of the coarse data signal is increased by one bit when the respective compared counts in the fine data signal are both less than the corresponding compared counts in the coarse data signal.

REFERENCES:
patent: 2991462 (1961-07-01), Hose
patent: 3223830 (1965-12-01), Evans
patent: 3277461 (1966-10-01), Selvin
patent: 3529136 (1970-09-01), Offereins

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