SEMICONDUCTOR DEVICE
First Claim
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1. A semiconductor device comprising:
- a word line;
a bit line;
a memory element comprising;
a transistor; and
a signal holding portion,wherein a gate terminal of the transistor is electrically connected to the word line,wherein one of a source terminal and a drain terminal of the transistor is electrically connected to the bit line, andwherein the other of the source terminal and the drain terminal of the transistor is electrically connected to the signal holding portion;
a capacitor being capable of holding a potential of the gate terminal of the transistor, wherein a first terminal of the capacitor is electrically connected to the word line;
a word line driver circuit configured to control a potential of a second terminal of the capacitor; and
a bit line driver circuit configured to control a potential of the bit line.
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Accused Products
Abstract
An object is to provide a semiconductor device capable of accurate data retention even with a memory element including a depletion mode transistor. A gate terminal of a transistor for controlling input of a signal to a signal holding portion is negatively charged in advance. The connection to a power supply is physically broken, whereby negative charge is held at the gate terminal. Further, a capacitor having terminals one of which is electrically connected to the gate terminal of the transistor is provided, and thus switching operation of the transistor is controlled with the capacitor.
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Citations
14 Claims
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1. A semiconductor device comprising:
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a word line; a bit line; a memory element comprising; a transistor; and a signal holding portion, wherein a gate terminal of the transistor is electrically connected to the word line, wherein one of a source terminal and a drain terminal of the transistor is electrically connected to the bit line, and wherein the other of the source terminal and the drain terminal of the transistor is electrically connected to the signal holding portion; a capacitor being capable of holding a potential of the gate terminal of the transistor, wherein a first terminal of the capacitor is electrically connected to the word line; a word line driver circuit configured to control a potential of a second terminal of the capacitor; and a bit line driver circuit configured to control a potential of the bit line. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A semiconductor device comprising:
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a word line; a bit line; a memory element comprising; a first transistor; and a signal holding portion, wherein a gate terminal of the first transistor is electrically connected to the word line, wherein one of a source terminal and a drain terminal of the first transistor is electrically connected to the bit line, and wherein the other of the source terminal and the drain terminal of the first transistor is electrically connected to the signal holding portion; a capacitor being capable of holding a potential of the gate terminal of the first transistor, wherein a first terminal of the capacitor is electrically connected to the word line; a word line driver circuit configured to control a potential of a second terminal of the capacitor; a bit line driver circuit configured to control a potential of the bit line; and a second transistor, wherein one of a source terminal and a drain terminal of the second transistor is electrically connected to the word line. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification