Method and apparatus for reducing noise induced among conductive lines
AssigneeInternational Business Machines Corporation
InventorsChristopher McCall Durham, Peter Juergen Klim, John Andrew Beck
Life of this patent
Estimating the term…
Abstract
For transmitting information on a plurality of integrated circuit conductive lines, n conductive lines are provided on a path in an integrated circuit. The path has first and second portions, and an interposing, transition portion. The lines have first positions with respect to one another in the first portion, and certain of the lines change relative positions in the transition portion, so that the lines have second positions with respect to one another in the second portion. The information is encoded in a format wherein no more than one of the n lines has a signal asserted thereon at a time, so that there is a reduction in noise induced among the lines.
Claims24
A method for transmitting encoded logical state information on a plurality of integrated circuit conductive lines, comprising the steps of:
- encoding a selected one of four predetermined logical states to an encoded signal;
- and
- transmitting the encoded signal on four conductive lines, wherein the transmitting includes:
- impressing a first voltage level on no more than one selected conductive line at a time among the four conductive lines;
- impressing a second voltage level, at the same time, on the three conductive lines not having the first voltage impressed thereon;
- and
- transmitting the voltages in first positions with respect to one another along a first portion of the lines, and second positions with respect to one another along a second portion of the lines, so that there is a reduction in noise induced by voltage differences among the lines.
A method for reducing induced noise in the transmitting of information on a plurality of integrated circuit conductive lines, comprising the steps of:
- impressing a first voltage level on no more than one conductive line at a time among n conductive lines of a first set of n conductive lines;
- impressing a second voltage level, at the same time, on all the n conductive lines of the first set not having the first voltage level impressed thereon;
- transmitting the first and second voltages levels in first positions with respect to one another along a first portion of the lines in the first set, and second positions with respect to one another along a second portion of the lines in the first set;
- impressing the first voltage level on no more than one conductive line at a time among n conductive lines of a second set of n conductive lines;
- impressing the second voltage level, at the same time, on all of the n conductive lines of the second set not having the first voltage level impressed thereon;
- and
- transmitting the first and second voltage levels in first positions with respect to one another along a first portion of the lines in the second set, second positions with respect to one another along a second portion of the lines in the second set, and third positions with respect to one another along a third portion of the lines in the second set.
A computer data signal, comprising:
- a first voltage level impressed on no more than one selected conductive line at any given time among four conductive lines;
- a second voltage level impressed, at said any given time, on the other three of the four lines, wherein the first voltage level impressed on the one selected line and the second voltage level impressed on the other three lines represents a selected one of four predetermined logical states according to an encoding of the four logical states, and wherein the first and second voltage levels are transmitted on the lines in first positions with respect to one another along a first portion of the lines, and second positions with respect to one another along a second portion of the lines, so that there is a reduction in noise induced by voltage differences among the lines.
A plurality of computer data signals, comprising:
- first voltage level impressed on no more than one conductive line at a time among n conductive lines of a first set of n conductive lines;
- second voltage level impressed, at the same time, on all the n conductive lines of the first set not having the first voltage level impressed thereon, wherein the voltages are transmitted in first positions with respect to one another along a first portion of the lines in the first set, and second positions with respect to one another along a second portion of the lines in the first set;
- the first voltage level impressed on no more than one conductive line at a time among n conductive lines of a second set of n conductive lines;
- and
- the second voltage level impressed, at the same time, on all the n conductive lines of the second set not having the first voltage level impressed thereon, wherein the first and second voltage levels are transmitted in first positions with respect to one another along a first portion of the lines in the second set, second positions with respect to one another along a second portion of the lines in the second set, and third positions with respect to one another along a third portion of the lines in the second set.
Dependencies are inferred from the claim text.