Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion
Patent
1987-03-13
1989-07-11
Shoop, Jr., William M.
Coded data generation or conversion
Analog to or from digital conversion
Digital to analog conversion
341145, H03M 176
Patent
active
048476218
ABSTRACT:
A converter converts to an analog value a plurality of digital signals each having characteristics representing an individual digital value. A plurality of switches are disposed in sets with the switches in each set being responsive to an individual one of the digital signals. The number of switches in each set is related to the digital significance of the set, preferably on an inverse basis. The switches are connected in a repetitive array to output members and a line to provide for the connection for progressive ones of the members to the output line in accordance with the pattern of the switches in the conductive and non-conductive states in representation of progressive increases in the digital value. The repetitive also provides, with such progressive increases in the digital values, output members previously connected to the line. The repetitive array may be responsive to the digital signals in a single delay time. The output members progressively connected to the line preferably have a linear disposition. A current flows through each of such output members to indicate the analog value on a cumulative basis. In the converter, each of the ouput members may be connected to an individual one of the switches in the sub-set of least digital significance, alternate ones of the remaining output members may be connected to the control switches in the sub-set of next remaining digital significance; and the other output members may be connected to the switches in the sub-sets of progressive digital significance in a corresponding pattern.
REFERENCES:
patent: 4176287 (1979-11-01), Remedi
Brooktree Corporation
Hoff Marc S.
Roston Ellsworth R.
Schwartz Charles H.
Shoop Jr. William M.
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