Boots – shoes – and leggings
Patent
1978-08-08
1980-07-15
Malzahn, David H.
Boots, shoes, and leggings
318573, 364701, G06F 1546
Patent
active
042131863
ABSTRACT:
The prior D.D.A. (Digital Differential Analyzer) having an integrand register, a remainder register and an adder for pulse interpolation has been improved by attaching some new units to the same, including a counter for counting the reference instruction pulses, a register for storing the content of the counter, and a multiplier for providing the product of the content of said register and the content of said integrand register. The product provided by the multiplier instead of the output of the integrand register, is applied to one input of the adder, the other input of which receives the output of said remainder register. Thus, the interpolation calculation has only to be performed once in every several periods of the instruction pulses, therefore, a slow speed digital element can be utilized for high speed instruction calculation.
REFERENCES:
patent: 3590226 (1971-06-01), Lane
patent: 3911258 (1975-10-01), Kishi et al.
patent: 4031369 (1977-06-01), Heaman
patent: 4059746 (1977-11-01), Haga
patent: 4125897 (1978-11-01), Murata et al.
Henegar, "New Continuous Path System Uses DDA Interpolator", Control Engineering, Jan. 1961, pp. 71-76.
Kito Terukazu
Murata Kazuo
Malzahn David H.
OKI Electric Industry Co., Ltd.
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