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US 7,606,103 B2Granted
Semiconductor memory device for controlling reservoir capacitor
AssigneeHynix Semiconductor Inc.
InventorChae-Kyu Jang
Life of this patent
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Abstract
A semiconductor memory device is provided. Especially, there is disclosed a technique capable of increasing a net die by employing a cell capacitor as a reservoir capacitor according to a set mode. The semiconductor memory device of the present invention uses the cell capacitor as the reservoir capacitor in a normal mode, and prevents each voltage from being applied to the cell capacitor in a burn-in test mode. The voltage applied to the cell capacitor or MOS transistor can be adjusted according to the set mode.
Claims14
A semiconductor memory device comprising:
- a power supply unit for receiving and delivering a power supply voltage;
- a reservoir capacitor for storing the power supply voltage provided from the power supply unit;
- and
- a mode controller for disconnecting the power supply unit from the reservoir capacitor in response to a mode selection signal when a current operation mode is a test mode and connecting the power supply unit to the reservoir capacitor in response to the mode selection signal when the current operation mode is a normal mode,
- wherein the mode selection signal has a different state depending on a combination of a plurality of control signals for mode setting.
2 more elements
A semiconductor memory device comprising;
- a plurality of reservoir capacitors;
- a first power supply unit, arranged to correspond to the plurality of reservoir capacitors, for controlling a supply of a plurality of first voltages with different levels;
- a mode controller for outputting a mode selection signal having a different state depending on a combination of a plurality of control signals for mode setting;
- and
- a connection unit for selectively connecting the plurality of first voltages to one terminal of the corresponding reservoir capacitors in response to the mode selection signal, respectively;
- wherein each of the plurality of reservoir capacitors receives the corresponding first voltage through the first power supply unit in a normal mode, and halts receipt of the first voltage under the control of the mode controller in a burn-in test mode.
3 more elements
Dependencies are inferred from the claim text.