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US 12,406,746 B2Granted
Semiconductor storage apparatus capable of efficiently performing screening test
AssigneeAblic Inc.
InventorYasushi Imai
Life of this patent
Estimating the term…
Abstract
Provided is a semiconductor storage apparatus having a storage apparatus driving circuit which can efficiently perform screening tests for the semiconductor memory device. A semiconductor memory device includes a wright-voltage supply circuit, a wright-voltage switching circuit, a bit line discharge control circuit, a bit line discharge circuit, and a memory array. The wright-voltage supply circuit is connected to the memory array through the wright-voltage switching circuit. The bit line discharge control circuit is connected to the memory array through the bit line discharge circuit.
Claims6
A semiconductor storage apparatus, comprising:
- a wright-voltage switching circuit;
- a memory array;
- a wright-voltage supply circuit connected to the memory array through the wright-voltage switching circuit;
- a bit line discharge circuit;
- and
- a bit line discharge control circuit connected to the memory array through the bit line discharge circuit, wherein the wright-voltage supply circuit supplies at least two types of sense line wright-voltages to the wright-voltage switching circuit,
- wherein the wright-voltage switching circuit individually supplies voltages to at least two groups of sense lines in the memory array,
- wherein the bit line discharge control circuit outputs at least two types of bit line discharge control signals to the bit line discharge circuit, and
- wherein the bit line discharge circuit individually supplies discharge voltages to at least two groups of bit lines in the memory array.
6 more elements
A semiconductor storage apparatus, comprising:
- a wright-voltage switching circuit;
- a memory array;
- a wright-voltage supply circuit connected to the memory array through the wright-voltage switching circuit;
- a bit line discharge circuit;
- and
- a bit line discharge control circuit connected to the memory array through the bit line discharge circuit,
- wherein the wright-voltage supply circuit comprises a wright-voltage input port, a first erase cycle control signal input port, a second erase cycle control signal input port, a first wright-cycle control signal input port, a second wright-cycle control signal input port, an odd sense line test signal input port, an even sense line test signal input port, an odd sense line wright-voltage output port, an even sense line wright-voltage output port, a bit line wright-voltage output port, first to fourth OR circuits, and first to third level shift circuits, wherein
- the wright-voltage input port is each connected to the first to third level shift circuits,
- the first OR circuit is connected to the first erase cycle control signal input port, the odd sense line test signal input port, and the first level shift circuit,
- the second OR circuit is connected to the second erase cycle control signal input port, the odd sense line test signal input port, and the first level shift circuit,
- the third OR circuit is connected to the first erase cycle control signal input port, the even sense line test signal input port, and the second level shift circuit,
- the fourth OR circuit is connected to the second erase cycle control signal input port, the even sense line test signal input port, and the second level shift circuit,
- the odd sense line wright-voltage output port is connected to the first level shift circuit,
- the even sense line wright-voltage output port is connected to the second level shift circuit, and
- the bit line wright-voltage output port is connected to the third level shift circuit.
12 more elements
A semiconductor storage apparatus, comprising:
- a wright-voltage switching circuit;
- a memory array;
- a wright-voltage supply circuit connected to the memory array through the wright-voltage switching circuit;
- a bit line discharge circuit;
- and
- a bit line discharge control circuit connected to the memory array through the bit line discharge circuit,
- wherein the wright-voltage supply circuit comprises:
- first to seventh input ports;
- first to third output ports;
- a logic circuit including first to fourth input terminals connected to the first to fourth input ports, a first output terminal to which a logical addition result of a first signal supplied from the first input port and a second signal supplied from the second input port is supplied, a second output terminal to which a logical addition result of the second signal and a third signal supplied from the third input port is supplied, a third output terminal to which a logical addition result of the first signal and a fourth signal supplied from the fourth input port is supplied, and a fourth output terminal to which a logical addition result of the third signal and the fourth signal is supplied;
- a first level shift circuit including the first input terminal connected to the first output terminal of the logic circuit, the second input terminal connected to the second output terminal of the logic circuit, the third input terminal connected to the fifth input port, and an output terminal connected to the first output port;
- a second level shift circuit including the first input terminal connected to the third output terminal of the logic circuit, the second input terminal connected to the fourth output terminal of the logic circuit, the third input terminal connected to the fifth input port, and an output terminal connected to the second output port;
- and
- a third level shift circuit including the first input terminal connected to the sixth input port, the second input terminal connected to the seventh input port, the third input terminal connected to the fifth input port, and an output terminal connected to the third output port.
11 more elements
Dependencies are inferred from the claim text.