Semiconductor Overdriver for Internal Voltage Stability
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Solution Overview
Problem
Conventional semiconductor devices face instability in maintaining internal voltage levels during high-speed operations due to increased current demand in continuous write operations, leading to insufficient voltage supply for write drivers.
Innovation Solution
Incorporating an overdriver that overdrives the internal voltage supply terminal using an external voltage, controlled by a signal generator and pull-up driver, to maintain the internal voltage within a predetermined range during continuous write operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the semiconductor device operates at high speed with continuous write operations, then the processing speed and productivity are improved, but the internal voltage level is lowered due to increased current demand
Solution Approach 1:
The overdriver performs preliminary action by boosting the internal voltage supply terminal before the write driver operates. The overdriver is activated in advance during the write operation to ensure sufficient voltage level is maintained, preventing voltage droop that would occur during high-speed continuous write operations
Solution Approach 2:
The invention changes the voltage parameter dynamically by introducing an overdriver that adjusts the internal voltage supply terminal level. The overdriver modifies the voltage parameter to compensate for the increased current demand during high-speed operations, maintaining the voltage within an appropriate range despite varying load conditions
2Duration of action of moving object
If the internal voltage generator supplies voltage during continuous write operations, then the write driver can operate continuously, but the internal voltage level gradually lowers and becomes insufficient
Solution Approach 1:
The overdriver ensures continuity of useful action by maintaining the internal voltage supply terminal at an appropriate level throughout the entire continuous write operation. It continuously compensates for voltage droop, ensuring the write driver can operate continuously without voltage level degradation affecting performance
Solution Approach 2:
The overdriver is activated in advance and maintains voltage compensation throughout the write operation duration, preventing voltage insufficiency before it occurs during continuous operations
Data Source
AI summary
A semiconductor device is disclosed which can perform a stable data inputting operation by overdriving a terminal supplying an internal voltage used as a drive voltage for a write driver such that the internal voltage is maintained in a predetermined range irrespective of a continuous write operation. The semiconductor device includes an internal voltage generator which generates an internal voltage corresponding to a predetermined reference voltage, and outputs the generated internal voltage to an internal voltage supply terminal, an overdriver which overdrives the internal voltage supply terminal for a predetermined period of time in response to an enable state of a control signal, the control signal being enabled in a write operation, and a write driver which is enabled in response to the control signal, to drive data transferred via a global data bus line using a voltage supplied from the internal voltage supply terminal, and to output the driven data to a local data bus line.