H - Electricity – 03 – M
Patent
H - Electricity
03
M
354/70
H03M 1/12 (2006.01)
Patent
CA 1164101
ABSTRACT Signal information is converted between analog and digital form in a two-step process employing con- version apparatus having stable, but not necessarily highly accurate components. The component tolerances on such conversion apparatus are much greater than those normally allowed on conventional conversion apparatus of equal accuracy. In an A/D conversion, an analog signal is first converted into an (n+m)-bit digital word in a special purpose digital code unique to the specific A/D conversion apparatus. The (n+m)-bit word is then translated into an n-bit word in binary digital code in accordance with a predetermined relationship therebetween. In a D/A conversion, an n-bit digital word in a binary digital code is first translated into a corresponding (n+m)-bit digital word in the special purpose digital code. The (n+m)-bit word is then con- verted into an equivalent analog signal; the latter step being performed by a conversion apparatus unique to the special purpose digital code. A plurality of A/D and D/A converters suitable for use with the present invention are disclosed. A number of converter calibra- tion techniques are also disclosed.
414057
Whiteside Arliss E.
Wolber William G.
Bendix Corporation (the)
Macrae & Co.
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