Method of comparison between cache and data register for non-volatile memory

A bit comparator circuit, comprising:

• first and second data input, wherein each data input has a normal and inverted signal line;
• a common error signal line;
• a pull-up circuit coupled to the common error signal line;
• a first series-coupled transistor chain, having a first and second transistors coupled in series, wherein the first series-coupled chain is coupled to the common error signal line and to a low signal level power rail, and where a control gate of the first transistor is coupled to the normal signal line of the first data input and a control gate of the second transistor is coupled to the inverted signal line of the second data input;
• and
• a second series-coupled transistor chain, having a first and second transistors coupled in series, wherein the second series-coupled chain is coupled to the common error signal line and to a low signal level power rail, and where a control gate of the first transistor is coupled to the inverted signal line of the first data input and a control gate of the second transistor is coupled to the normal signal line of the second data input.

A data comparison circuit, comprising:

• a first and second plurality of data input signal lines, each adapted to assert a plurality of data bit values;
• a common error signal line;
• a means for pulling up a signal line coupled to the common error signal line;
• and
• a means for comparing the plurality of data bit values of the first and second data input signal lines in a parallel data bit comparison and pulling down the common error signal line by overriding the means for pulling up a signal line when the asserted data bit values of the first and second data input signal lines miscompare;
• wherein the means for comparing the plurality of data bit values comprises:
• a first series-coupled transistor chain, having a first and second transistors coupled in series, wherein the first series-coupled transistor chain is coupled to the common error signal line and to a low signal level power rail, and where a control gate of the first transistor is coupled to a normal signal of the first data input and a control gate of the second transistor is coupled to a inverted signal of the second data input;
• and
• a second series-coupled transistor chain, having a first and second transistors coupled in series, wherein the second series-coupled transistor chain is coupled to the common error signal line and to a low signal level power rail, and where a control gate of the first transistor is coupled to a inverted signal of the first data input and a control gate of the second transistor is coupled to a normal signal of the second data input.

A data comparison circuit, comprising:

• a first and second plurality of data input signal lines, each adapted to assert a plurality of data bit values;
• a common error signal line;
• a means for pulling down a signal line coupled to the common error signal line;
• and
• a means for comparing the plurality of data bit values of the first and second data input signal lines in a parallel data bit comparison and pulling up the common error signal line by overriding the means for pulling down a signal line when the asserted data bit values of the first and second data input signal lines miscompare;
• wherein the means for comparing the plurality of data bit values comprises:
• a first series-coupled transistor chain, having a first and second transistors coupled in series, wherein the first series-coupled transistor chain is coupled to the common error signal line and to a low signal level power rail, and where a control gate of the first transistor is coupled to a normal signal of the first data input and a control gate of the second transistor is coupled to a inverted signal of the second data input;
• and
• a second series-coupled transistor chain, having a first and second transistors coupled in series, wherein the second series-coupled transistor chain is coupled to the common error signal line and to a low signal level power rail, and where a control gate of the first transistor is coupled to a inverted signal of the first data input and a control gate of the second transistor is coupled to a normal signal of the second data input.

A data comparison circuit, comprising:

• a first and second plurality of data input signal lines, each adapted to assert a plurality of data bit values;
• a common error signal line;
• a means for pulling up a signal line coupled to the common error signal line;
• a means for comparing the plurality of data bit values of the first and second data input signal lines and pulling down the common error signal line when the asserted data bit values of the first and second data input signal lines miscompare;
• a means for logically AND-ing signals coupled to the common error signal line;
• and
• a plurality of means for comparing a section of the plurality of data bit values of the first and second data input signal lines and outputting a signal coupled to the means for logically AND-ing signals.

A data comparison circuit, comprising:

• a first and second plurality of data input signal lines;
• a plurality of bit comparators coupled to the first and second plurality of data input signal lines;
• a common error signal line coupled to each of the plurality of bit comparators;
• and
• a pull-down circuit coupled to the common error signal line;
• wherein each bit comparator further comprises:
• a first series-coupled transistor chain, having a first and second transistors coupled in series, wherein the first series-coupled transistor chain is coupled to the common error signal line and to a high signal level power rail, and where a control gate of the first transistor is coupled to a normal signal of the first data input and a control gate of the second transistor is coupled to a inverted signal of the second data input;
• and
• a second series-coupled transistor chain, having a first and second transistors coupled in series, wherein the second series-coupled transistor chain is coupled to the common error signal line and to a high signal level power rail, and where a control gate of the first transistor is coupled to a inverted signal of the first data input and a control gate of the second transistor is coupled to a normal signal of the second data input.

A data comparison circuit, comprising:

• a first and second plurality of data input signal lines;
• a plurality of bit comparators coupled to the first and second plurality of data input signal lines;
• a common error signal line coupled to each of the plurality of bit comparators;
• and
• a pull-down circuit coupled to the common error signal line;
• wherein each bit comparator further comprises:
• an open collector XOR gate having a first and second inputs and an open collector output, wherein the first XOR input is coupled to the first data input, the second XOR input is coupled to the second data input, and the open collector output is coupled to the common error signal line.

A bit comparator circuit, comprising:

• first and second data input, wherein each data input has a normal and inverted signal line;
• a common error signal line;
• a pull-down circuit coupled to the common error signal line;
• a first series-coupled transistor chain, having a first and second transistors coupled in series, wherein the first series-coupled chain is coupled to the common error signal line and to a logical high signal level power rail, and where a control gate of the first transistor is coupled to the normal signal line of the first data input and a control gate of the second transistor is coupled to the inverted signal line of the second data input;
• and
• a second series-coupled transistor chain, having a first and second transistors coupled in series, wherein the second series-coupled chain is coupled to the common error signal line and to a logical high signal level power rail, and where a control gate of the first transistor is coupled to the inverted signal line of the first data input and a control gate of the second transistor is coupled to the normal signal line of the second data input.