SEMICONDUCTOR DEVICE
First Claim
1. A semiconductor device comprising:
- a latch circuit including a first node and a second node being capable of retaining data of polarities opposite to each other, respectively;
a first transistor electrically connected between the first node and a first bit line and having a gate electrode electrically connected to a word line;
a second transistor electrically connected between the second node and a second bit line and having a gate electrode electrically connected to the word line;
a power-supply line electrically connected to the latch circuit;
a third transistor electrically connected between the first node and a reference voltage source;
a fourth transistor electrically connected between the second node and the reference voltage source and having a gate electrode electrically connected to the reference voltage source; and
a signal line electrically connected to a gate electrode of the third transistor, whereinthe power-supply line supplies a first voltage to the latch circuit and the signal line brings the third transistor to a non-conduction state in a first mode, andthe power-supply line supplies a second voltage to the latch circuit and the signal line brings the third transistor to a conduction state and electrically connects the first node to the reference voltage source in a second mode.
1 Assignment
0 Petitions
Accused Products
Abstract
A semiconductor device includes a latch including a first-node and a second-node. A first-transistor is between the first-node and a first-BL and has a gate connected to a WL. A second-transistor is between the second-node and a second-BL and has a gate connected to the WL. A power-supply line is connected to the latch. A third-transistor is connected between the first-node and a reference-voltage source. A fourth-transistor is between the second-node and the reference-voltage source and has a gate connected to the reference-voltage source. A signal line is connected to a gate of the third-transistor. In a first-mode, the power-supply line supplies a first-voltage to the latch and the signal line brings the third-transistor to a non-conduction state. In a second-mode, the power-supply line supplies a second-voltage to the latch and the signal line brings the third-transistor to a conduction state and connects the first-node to the reference-voltage source.
3 Citations
17 Claims
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1. A semiconductor device comprising:
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a latch circuit including a first node and a second node being capable of retaining data of polarities opposite to each other, respectively; a first transistor electrically connected between the first node and a first bit line and having a gate electrode electrically connected to a word line; a second transistor electrically connected between the second node and a second bit line and having a gate electrode electrically connected to the word line; a power-supply line electrically connected to the latch circuit; a third transistor electrically connected between the first node and a reference voltage source; a fourth transistor electrically connected between the second node and the reference voltage source and having a gate electrode electrically connected to the reference voltage source; and a signal line electrically connected to a gate electrode of the third transistor, wherein the power-supply line supplies a first voltage to the latch circuit and the signal line brings the third transistor to a non-conduction state in a first mode, and the power-supply line supplies a second voltage to the latch circuit and the signal line brings the third transistor to a conduction state and electrically connects the first node to the reference voltage source in a second mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A semiconductor device comprising:
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a latch circuit including a first node and a second node being capable of retaining data of polarities opposite to each other, respectively; a power-supply line electrically connected to the latch circuit; a ROM circuit electrically connected between the first node and a reference voltage source and between the second node and the reference voltage source; and a signal line electrically connected to the ROM circuit, wherein the power-supply line supplies a first voltage to the latch circuit to enable the latch circuit to retain data, and the signal line supplies a third voltage to the ROM circuit to enable the ROM circuit to electrically disconnect the first and second nodes from the reference voltage source in a first mode, and the power-supply line supplies a second voltage to the latch circuit to cause the latch circuit not to retain data, and the signal line supplies a fourth voltage to the ROM circuit to enable the ROM circuit to electrically connect either the first node or the second node to the reference voltage source in a second mode.
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Specification