Semiconductor device
First Claim
1. A semiconductor device comprising:
- a first transistor;
a second transistor;
a first inverter circuit comprising first inverter transistors; and
a second inverter circuit comprising second inverter transistors,wherein one of a source and a drain of the first transistor is electrically connected to a first wiring;
wherein the other of the source and the drain of the first transistor is electrically connected to an input of the first inverter circuit;
wherein an output of the first inverter circuit is electrically connected to one of a source and a drain of the second transistor;
wherein the other of the source and the drain of the second transistor is electrically connected to an input of the second inverter circuit;
wherein an output of the second inverter circuit is electrically connected to a second wiring;
wherein each of the first transistor and the second transistor comprises a channel formation region in an oxide semiconductor layer; and
wherein at least one of the first inverter transistors and one of the second inverter transistors comprise a channel formation region in a material other than an oxide semiconductor material.
1 Assignment
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Accused Products
Abstract
An object is to provide a low-power semiconductor device which does not require a latch circuit to hold data at the output of inverter circuits. In the semiconductor device, an input of a first inverter circuit is connected to an input terminal through a source and a drain of a first transistor. An input of a second inverter circuit is connected to an output of the first inverter circuit through a source and a drain of a second transistor. An output of the second inverter is connected to an output terminal. An inverted clock signal and a clock signal are input to gates of the first transistor and the second transistor, respectively. The first and the second transistor have extremely low off-current, which allows the output potential of the device to remain unchanged even when the input varies.
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Citations
38 Claims
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1. A semiconductor device comprising:
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a first transistor; a second transistor; a first inverter circuit comprising first inverter transistors; and a second inverter circuit comprising second inverter transistors, wherein one of a source and a drain of the first transistor is electrically connected to a first wiring; wherein the other of the source and the drain of the first transistor is electrically connected to an input of the first inverter circuit; wherein an output of the first inverter circuit is electrically connected to one of a source and a drain of the second transistor; wherein the other of the source and the drain of the second transistor is electrically connected to an input of the second inverter circuit; wherein an output of the second inverter circuit is electrically connected to a second wiring; wherein each of the first transistor and the second transistor comprises a channel formation region in an oxide semiconductor layer; and wherein at least one of the first inverter transistors and one of the second inverter transistors comprise a channel formation region in a material other than an oxide semiconductor material. - View Dependent Claims (6, 14, 19, 24, 29, 34)
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2. A semiconductor device comprising:
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a first transistor; a second transistor; a third transistor; a fourth transistor; a first inverter circuit comprising first inverter transistors; and a second inverter circuit comprising second inverter transistors, wherein the semiconductor device is configured to input a reset signal to a gate of the third transistor and a gate of the fourth transistor; wherein one of a source and a drain of the first transistor is electrically connected to a first wiring; wherein the other of the source and the drain of the first transistor is electrically connected to an input of the first inverter circuit; wherein an output of the first inverter circuit is electrically connected to one of a source and a drain of the second transistor; wherein the other of the source and the drain of the second transistor is electrically connected to an input of the second inverter circuit; wherein an output of the second inverter circuit is electrically connected to a second wiring; wherein one of a source and a drain of the third transistor is electrically connected to the input of the first inverter circuit; wherein the other of the source and the drain of the third transistor is electrically connected to a low voltage supply line; wherein one of a source and a drain of the fourth transistor is electrically connected to the input of the second inverter circuit; wherein the other of the source and the drain of the fourth transistor is electrically connected to a high voltage supply line; wherein each of the first transistor and the second transistor comprises a channel formation region in an oxide semiconductor layer; and wherein at least one of the first inverter transistors and one of the second inverter transistors comprise a channel formation region in a material other than an oxide semiconductor material. - View Dependent Claims (7, 11, 15, 20, 25, 30, 35)
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3. A semiconductor device comprising:
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a first transistor; a second transistor; a fifth transistor; a sixth transistor; a first inverter circuit comprising first inverter transistors; and a second inverter circuit comprising second inverter transistors, wherein the semiconductor device is configured to input a set signal to a gate of the fifth transistor and a gate of the sixth transistor; wherein one of a source and a drain of the first transistor is electrically connected to a first wiring; wherein the other of the source and the drain of the first transistor is electrically connected to an input of the first inverter circuit; wherein an output of the first inverter circuit is electrically connected to one of a source and a drain of the second transistor; wherein the other of the source and the drain of the second transistor is electrically connected to an input of the second inverter circuit; wherein an output of the second inverter circuit is electrically connected to a second wiring; wherein one of a source and a drain of the fifth transistor is electrically connected to the input of the first inverter circuit; wherein the other of the source and the drain of the fifth transistor is electrically connected to a high voltage supply line; wherein one of a source and a drain of the sixth transistor is electrically connected to the input of the second inverter circuit; wherein the other of the source and the drain of the sixth transistor is electrically connected to a low voltage supply line; wherein each of the first transistor and the second transistor comprises a channel formation region in an oxide semiconductor layer; and wherein at least one of the first inverter transistors and one of the second inverter transistors comprise a channel formation region in a material other than an oxide semiconductor material. - View Dependent Claims (8, 12, 16, 21, 26, 31, 36)
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4. A semiconductor device comprising:
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a first transistor; a second transistor; a third transistor; a fourth transistor; a fifth transistor; a sixth transistor; a first inverter circuit comprising first inverter transistors; and a second inverter circuit comprising second inverter transistors, wherein the semiconductor device is configured to input a reset signal to a gate of the third transistor and a gate of the fourth transistor; wherein the semiconductor device is configured to input a set signal to a gate of the fifth transistor and a gate of the sixth transistor; wherein one of a source and a drain of the first transistor is electrically connected to a first wiring; wherein the other of the source and the drain of the first transistor is electrically connected to an input of the first inverter circuit; wherein an output of the first inverter circuit is electrically connected to one of a source and a drain of the second transistor; wherein the other of the source and the drain of the second transistor is electrically connected to an input of the second inverter circuit; wherein an output of the second inverter circuit is electrically connected to a second wiring; wherein one of a source and a drain of the third transistor is electrically connected to the input of the first inverter circuit; wherein the other of the source and the drain of the third transistor is electrically connected to a low voltage supply line; wherein one of a source and a drain of the fourth transistor is electrically connected to the input of the second inverter circuit; wherein the other of the source and the drain of the fourth transistor is electrically connected to a high voltage supply line; wherein one of a source and a drain of the fifth transistor is electrically connected to the input of the first inverter circuit; wherein the other of the source and the drain of the fifth transistor is electrically connected to the high voltage supply line; wherein one of a source and a drain of the sixth transistor is electrically connected to the input of the second inverter circuit; wherein the other of the source and the drain of the sixth transistor is electrically connected to the low voltage supply line; wherein each of the first transistor and the second transistor comprises a channel formation region in an oxide semiconductor layer; and wherein at least one of the first inverter transistors and one of the second inverter transistors comprise a channel formation region in a material other than an oxide semiconductor material. - View Dependent Claims (9, 13, 17, 22, 27, 32, 37)
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5. A semiconductor device comprising:
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a first transistor; a second transistor; a first inverter circuit comprising first inverter transistors; a second inverter circuit comprising second inverter transistors, a first capacitor comprising a first pair of electrodes; and a second capacitor comprising a second pair of electrodes, wherein one of a source and a drain of the first transistor is electrically connected to a first wiring; wherein the other of the source and the drain of the first transistor is electrically connected to an input of the first inverter circuit; wherein an output of the first inverter circuit is electrically connected to one of a source and a drain of the second transistor; wherein the other of the source and the drain of the second transistor is electrically connected to an input of the second inverter circuit; wherein an output of the second inverter circuit is electrically connected to a second wiring; wherein one electrode of the first capacitor is electrically connected to the input of the first inverter circuit; wherein the other electrode of the first capacitor is electrically connected to a low voltage supply line; wherein one electrode of the second capacitor is electrically connected to the input of the second inverter circuit; wherein the other electrode of the second capacitor is electrically connected to the low voltage supply line; wherein each of the first transistor and the second transistor comprises a channel formation region in an oxide semiconductor layer; and wherein at least one of the first inverter transistors and one of the second inverter transistors comprise a channel formation region in a material other than an oxide semiconductor material. - View Dependent Claims (10, 18, 23, 28, 33, 38)
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Specification