Semiconductor memory device
AssigneeRenesas Electronics Corporation
InventorsHiroyuki Takahashi, Naoki Ookuma
Life of this patent
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Abstract
A semiconductor memory device includes a power supply circuit configured to supply an intermediate voltage between a power supply voltage and a ground voltage to each of a plurality of memory cells. The power supply circuit firsts generates a first intermediate voltage between the power supply voltage and the ground voltage and a second intermediate voltage between the power supply voltage and the ground voltage. In response to a first control signal, the first intermediate voltage is supplied to an output node and the second intermediate voltage stops. A connection control circuit connects the first output node and a second output node when the second intermediate voltage generating circuit stops its operation.
Claims18
A voltage switch circuit comprising:
- a first intermediate voltage generating circuit configured to generate a first intermediate voltage between a power supply voltage and a ground voltage to a first node in a first mode;
- a second intermediate voltage generating circuit configured to generate a second intermediate voltage between a power supply voltage and a ground voltage to a second node in said first mode;
- a connection control circuit arranged between said first node and said second node;
- wherein said first node is coupled to said second node through said connection control circuit in said first mode and a second mode different from said first mode;
- and
- a control circuit configured to reduce a power of said second intermediate voltage generating circuit in said second mode less than in said first mode.
A voltage generating circuit comprising:
- a first intermediate voltage generating circuit coupled to a first output node and configured to generate a first intermediate voltage between a power supply voltage and a ground voltage;
- a second intermediate voltage generating circuit coupled to a second output node and configured to generate a second intermediate voltage between a power supply voltage and a ground voltage;
- and
- a connection control circuit arranged between said first node and said second node;
- wherein said second output node reflects an output of said first intermediate voltage circuit and does not reflect an output of said second intermediate voltage circuit in a predetermined mode.
A voltage generating circuit comprising:
- a first intermediate voltage generating circuit coupled to a first node and configured to generate a first intermediate voltage between a power supply voltage and a ground voltage;
- a second intermediate voltage generating circuit coupled to a second node and configured to generate a second intermediate voltage between a power supply voltage and a ground voltage;
- a connection control circuit arranged between said first node and said second node,
- wherein said second intermediate voltage circuit are deactivated and said connection control circuit connects said first node to said second node in a predetermined mode.
Dependencies are inferred from the claim text.