Coded data generation or conversion – Digital code to digital code converters – To or from number of pulses
Patent
1988-11-28
1990-03-20
Shoop, Jr., William M.
Coded data generation or conversion
Digital code to digital code converters
To or from number of pulses
341 96, 341144, H03M 174
Patent
active
049105140
ABSTRACT:
A single-step digital-to-analog converter includes a multiplicity of individual interconnected sources disposed in a matrix having matrix rows and matrix columns; a decoder apparatus connected to the matrix for addressing the individual sources, the decoder apparatus including a column decoder for addressing at least the more significant part of an n-bit-wide digital word to be converted and a row decoder in the form of a thermometer decoder.
Logic apparatus is connected between the decoder apparatus and the matrix for determining the matrix column of one of the individual sources being addressed and for suppressing switching over of the individual sources of others of the columns. The logic apparatus includes first and second logic devices, the first logic device being connected between the column decoder and the matrix for deriving further column information (E.sub.i) and additional information (S.sub.i) from column information (X.sub.i) in accordance with the logical equations: E.sub.i =S.sub.i and S.sub.i =E.sub.i E.sub.i-l. The second logic device being assigned to each of the individual sources (Q.sub.ik) in accordance with logic equations that determine the connected state of a matrix column.
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patent: 4490634 (1984-12-01), Hareyama
patent: 4586025 (1986-04-01), Knierim
patent: 4691189 (1987-09-01), Dingwall et al.
patent: 4733220 (1988-03-01), Knierim
patent: 4791406 (1988-12-01), Mehrgardt et al.
Irmer Heimbert
Muhlbauer Otto
Greenberg Laurence A.
Lerner Herbert L.
Shoop Jr. William M.
Siemens Aktiengesellschaft
Young Brian K.
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