Semiconductor integrated circuit
First Claim
1. A semiconductor integrated circuit including a logic circuit, the logic circuit comprising:
- a comparator configured to compare potentials of two output nodes;
a charge holding portion electrically connected to the comparator, the charge holding portion comprising;
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; and
an output-node-potential determining portion,wherein one of a source and a drain of the first transistor is electrically connected to one of a source and a drain of the third transistor,wherein one of a source and a drain of the fifth transistor is electrically connected to one of a source and a drain of the seventh transistor and one of the two output nodes,wherein the other of the source and the drain of the first transistor is electrically connected to the other of the two output nodes,wherein the other of the source and the drain of the fifth transistor is electrically connected to the other of the source and drain of the seventh transistor and the output-node-potential determining portion,wherein the other of the source and the drain of the third transistor is electrically connected to the output-node-potential determining portion,wherein a gate of the first transistor is electrically connected to one of a source and a drain of the second transistor,wherein a gate of the third transistor is electrically connected to one of a source and a drain of the fourth transistor,wherein a gate of the fifth transistor is electrically connected to one of a source and a drain of the sixth transistor,wherein a gate of the seventh transistor is electrically connected to one of a source and a drain of the eighth transistor,wherein the other of the source and the drain of the second transistor is configured to receive a first signal input,wherein the other of the source and the drain of the fourth transistor is configured to receive a second signal input,wherein the other of the source and the drain of the sixth transistor is configured to receive a third signal input, andwherein the other of the source and the drain of the eighth transistor is configured to receive a fourth signal input.
1 Assignment
0 Petitions
Accused Products
Abstract
A novel logic circuit in which data is held even after power is turned off is provided. Further, a novel logic circuit whose power consumption can be reduced is provided. In the logic circuit, a comparator comparing two output nodes, a charge holding portion, and an output-node-potential determining portion are electrically connected to each other. Such a structure enables data to be held in the logic circuit even after power is turned off. Further, the total number of transistors in the logic circuit can be reduced. Furthermore, the area of the logic circuit can be reduced by stacking a transistor including an oxide semiconductor and a transistor including silicon.
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Citations
16 Claims
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1. A semiconductor integrated circuit including a logic circuit, the logic circuit comprising:
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a comparator configured to compare potentials of two output nodes; a charge holding portion electrically connected to the comparator, the charge holding portion comprising; 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; and an output-node-potential determining portion, wherein one of a source and a drain of the first transistor is electrically connected to one of a source and a drain of the third transistor, wherein one of a source and a drain of the fifth transistor is electrically connected to one of a source and a drain of the seventh transistor and one of the two output nodes, wherein the other of the source and the drain of the first transistor is electrically connected to the other of the two output nodes, wherein the other of the source and the drain of the fifth transistor is electrically connected to the other of the source and drain of the seventh transistor and the output-node-potential determining portion, wherein the other of the source and the drain of the third transistor is electrically connected to the output-node-potential determining portion, wherein a gate of the first transistor is electrically connected to one of a source and a drain of the second transistor, wherein a gate of the third transistor is electrically connected to one of a source and a drain of the fourth transistor, wherein a gate of the fifth transistor is electrically connected to one of a source and a drain of the sixth transistor, wherein a gate of the seventh transistor is electrically connected to one of a source and a drain of the eighth transistor, wherein the other of the source and the drain of the second transistor is configured to receive a first signal input, wherein the other of the source and the drain of the fourth transistor is configured to receive a second signal input, wherein the other of the source and the drain of the sixth transistor is configured to receive a third signal input, and wherein the other of the source and the drain of the eighth transistor is configured to receive a fourth signal input. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A semiconductor device including a logic circuit, the logic circuit comprising:
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a comparator configured to compare potentials of a first output node and a second output node; a charge holding portion electrically connected to the comparator, the charge holding portion comprising; a first circuit comprising a first terminal and a second terminal, the first circuit comprising a first transistor and a second transistor; and a second circuit comprising a third terminal and a fourth terminal, the second circuit comprising a third transistor and a fourth transistor; and an output-node-potential determining portion, wherein the first transistor and the second transistor are electrically connected in series, wherein the third transistor and the fourth transistor are electrically connected in parallel, wherein the first terminal is electrically connected to the first output node, wherein the third terminal is electrically connected to the second output node, wherein the second terminal and the fourth terminal are electrically connected to the output-node-potential determining portion, wherein a gate of the first transistor is configured to receive and hold a first signal input, wherein a gate of the second transistor is configured to receive and hold a second signal input, wherein a gate of the third transistor is configured to receive and hold a third signal input, and wherein a gate of the fourth transistor is configured to receive and hold a fourth signal input. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification