Semiconductor memory device for controlling reservoir capacitor
First Claim
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1. 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.
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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.
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Citations
14 Claims
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1. A semiconductor memory device comprising:
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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. - View Dependent Claims (2, 3)
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4. A semiconductor memory device comprising;
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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. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification