Semiconductor integrated circuit
First Claim
Patent Images
1. A logic circuit including:
- a first transistor whose gate is electrically connected to one of a source or a drain of a second transistor;
a third transistor whose gate is electrically connected to one of a source or a drain of a fourth transistor;
a fifth transistor whose gate is electrically connected to one of a source or a drain of a sixth transistor;
a seventh transistor whose gate is electrically connected to one of a source or a drain of an eighth transistor;
a ninth transistor whose gate is electrically connected to one of a source or a drain of a tenth transistor;
an eleventh transistor whose gate is electrically connected to one of a source or a drain of a twelfth transistor;
a thirteenth transistor whose gate is electrically connected to one of a source or a drain of a fourteenth transistor; and
a fifteenth transistor whose gate is electrically connected to one of a source or a drain of a sixteenth transistor including an oxide semiconductor; and
a seventeenth transistor, an eighteenth transistor, a nineteenth transistor, a twentieth transistor and a twenty-first transistor,wherein each of the first transistor, the third transistor, the fifth transistor, the seventh transistor, the ninth transistor, the eleventh transistor, the thirteenth transistor and the fifteenth transistor includes silicon,wherein each of the second transistor, the fourth transistor, the sixth transistor, the eighth transistor, the tenth transistor, the twelfth transistor, the fourteenth transistor and the sixteenth transistor includes an oxide semiconductor,wherein one of a source and a drain of the eighteenth transistor, one of a source and a drain of the nineteenth transistor, one of a source and a drain of the twentieth transistor and one of a source and a drain of the twenty-first transistor are electrically connected to each other,wherein the other of the source and the drain of the eighteenth transistor, a gate of the twentieth transistor, one of a source and a drain of the first transistor, and one of a source and a drain of the fifth transistor are electrically connected to each other at a first node,wherein the other of the source and the drain of the twenty-first transistor, a gate of the nineteenth transistor, one of a source and a drain of the ninth transistor, and one of a source and a drain of the thirteenth transistor are electrically connected to each other at a second node,wherein the other of the source and the drain of the first transistor is electrically connected to one of a source and a drain of the third transistor,wherein the other of the source and the drain of the fifth transistor is electrically connected to one of a source and a drain of the seventh transistor,wherein the other of the source and the drain of the ninth transistor is electrically connected to one of a source and a drain of the eleventh transistor,wherein the other of the source and the drain of the thirteenth transistor is electrically connected to one of a source and a drain of the fifteenth transistor, andwherein the other of the source and the drain of the third transistor, the other of the source and the drain of the seventh transistor, the other of the source and the drain of the eleventh transistor, the other of the source and the drain of the fifteenth transistor and one of a source and a drain of the seventeenth transistor are electrically connected to each other.
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Abstract
A novel logic circuit which retains data even when power supply is stopped is provided. Further, a novel logic circuit with low power consumption is provided. In the logic circuit, a comparator comparing two output nodes, a charge retaining portion, and an output-node-potential determining portion are electrically connected to each other. Thus, the logic circuit can retain data even when power supply is stopped. In addition, the total number of transistors included in the logic circuit can be reduced. Further, a transistor including an oxide semiconductor and a transistor including silicon are stacked, whereby the area of the logic circuit can be reduced.
120 Citations
21 Claims
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1. A logic circuit including:
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a first transistor whose gate is electrically connected to one of a source or a drain of a second transistor; a third transistor whose gate is electrically connected to one of a source or a drain of a fourth transistor; a fifth transistor whose gate is electrically connected to one of a source or a drain of a sixth transistor; a seventh transistor whose gate is electrically connected to one of a source or a drain of an eighth transistor; a ninth transistor whose gate is electrically connected to one of a source or a drain of a tenth transistor; an eleventh transistor whose gate is electrically connected to one of a source or a drain of a twelfth transistor; a thirteenth transistor whose gate is electrically connected to one of a source or a drain of a fourteenth transistor; and a fifteenth transistor whose gate is electrically connected to one of a source or a drain of a sixteenth transistor including an oxide semiconductor; and a seventeenth transistor, an eighteenth transistor, a nineteenth transistor, a twentieth transistor and a twenty-first transistor, wherein each of the first transistor, the third transistor, the fifth transistor, the seventh transistor, the ninth transistor, the eleventh transistor, the thirteenth transistor and the fifteenth transistor includes silicon, wherein each of the second transistor, the fourth transistor, the sixth transistor, the eighth transistor, the tenth transistor, the twelfth transistor, the fourteenth transistor and the sixteenth transistor includes an oxide semiconductor, wherein one of a source and a drain of the eighteenth transistor, one of a source and a drain of the nineteenth transistor, one of a source and a drain of the twentieth transistor and one of a source and a drain of the twenty-first transistor are electrically connected to each other, wherein the other of the source and the drain of the eighteenth transistor, a gate of the twentieth transistor, one of a source and a drain of the first transistor, and one of a source and a drain of the fifth transistor are electrically connected to each other at a first node, wherein the other of the source and the drain of the twenty-first transistor, a gate of the nineteenth transistor, one of a source and a drain of the ninth transistor, and one of a source and a drain of the thirteenth transistor are electrically connected to each other at a second node, wherein the other of the source and the drain of the first transistor is electrically connected to one of a source and a drain of the third transistor, wherein the other of the source and the drain of the fifth transistor is electrically connected to one of a source and a drain of the seventh transistor, wherein the other of the source and the drain of the ninth transistor is electrically connected to one of a source and a drain of the eleventh transistor, wherein the other of the source and the drain of the thirteenth transistor is electrically connected to one of a source and a drain of the fifteenth transistor, and wherein the other of the source and the drain of the third transistor, the other of the source and the drain of the seventh transistor, the other of the source and the drain of the eleventh transistor, the other of the source and the drain of the fifteenth transistor and one of a source and a drain of the seventeenth transistor are electrically connected to each other. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A logic circuit comprising:
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a first node and a second node; a comparator configured to compare potentials of the first and the second node; a charge retaining portion electrically connected to the comparator via the first node and the second node; and an output-node-potential determining portion electrically connected to the charge retaining portion, wherein the charge retaining portion comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, a ninth transistor, a tenth transistor, an eleventh transistor, a twelfth transistor, a thirteenth transistor, a fourteenth transistor, a fifteenth transistor and a sixteenth transistor, wherein each of the first transistor, the second transistor, the third transistor, the fourth transistor, the ninth transistor, the tenth transistor, the eleventh transistor and the twelfth transistor includes an oxide semiconductor, wherein a gate of the fifth transistor is electrically connected to one of a source and a drain of the first transistor, wherein a gate of the sixth transistor is electrically connected to one of a source and a drain of the second transistor, wherein a gate of the seventh transistor is electrically connected to one of a source and a drain of the third transistor, wherein a gate of the eighth transistor is electrically connected to one of a source and a drain of the fourth transistor, wherein a gate of the thirteenth transistor is electrically connected to one of a source and a drain of the ninth transistor, wherein a gate of the fourteenth transistor is electrically connected to one of a source and a drain of the tenth transistor, wherein a gate of the fifteenth transistor is electrically connected to one of a source and a drain of the eleventh transistor, wherein a gate of the sixteenth transistor is electrically connected to one of a source and a drain of the twelfth transistor, wherein one of a source and a drain of the fifth transistor is electrically connected to the first node, wherein one of a source and a drain of the sixth transistor is electrically connected to the other of the source and the drain of the fifth transistor, wherein one of a source and a drain of the seventh transistor is electrically connected to the first node, wherein one of a source and a drain of the eighth transistor is electrically connected to the other of the source and the drain of the seventh transistor, wherein one of a source and a drain of the thirteenth transistor is electrically connected to the second node, wherein one of a source and a drain of the fourteenth transistor is electrically connected to the other of the source and the drain of the thirteenth transistor, wherein one of a source and a drain of the fifteenth transistor is electrically connected to the second node, wherein one of a source and a drain of the sixteenth transistor is electrically connected to the other of the source and the drain of the fifteenth transistor, and wherein the output-node-potential determining portion comprises a seventeenth transistor whose source or drain is electrically connected to the other of the source and the drain of the sixth transistor, the other of the source and the drain of the eighth transistor, the other of the source or the drain of the fourteenth transistor and the other of the source or the drain of the sixteenth transistor. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A logic circuit comprising:
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a first node and a second node; a comparator configured to compare potentials of the first node and the second node; a charge retaining portion electrically connected to the comparator via the first node and the second node; and an output-node-potential determining portion electrically connected to the charge retaining portion, wherein the charge retaining portion comprises a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor and an eighth transistor, wherein each of the first transistor, the second transistor, the third transistor and the fourth transistor includes an oxide semiconductor, wherein a gate of the fifth transistor is electrically connected to one of a source and a drain of the first transistor, wherein a gate of the sixth transistor is electrically connected to one of a source and a drain of the second transistor, wherein a gate of the seventh transistor is electrically connected to one of a source and a drain of the third transistor, wherein a gate of the eighth transistor is electrically connected to one of a source and a drain of the fourth transistor, wherein one of a source and a drain of the fifth transistor is electrically connected to the first node, wherein one of a source and a drain of the sixth transistor is electrically connected to the other of the source and the drain of the fifth transistor, wherein one of a source and a drain of the seventh transistor is electrically connected to the first node, wherein one of a source and a drain of the eighth transistor is electrically connected to the other of the source and the drain of the seventh transistor, and wherein the output-node-potential determining portion is electrically connected to the other of the source and the drain of the sixth transistor and the other of the source and the drain of the eighth transistor. - View Dependent Claims (17, 18, 19, 20, 21)
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Specification