DRAM Pump System Dynamic Spare Activation
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Solution Overview
Problem
Current DRAM pump systems are inefficient as they require redesigning the circuit structure to utilize spare pump devices for higher refresh rates, leading to suboptimal component usage and limited application flexibility, as they can only operate at a single refresh rate.
Innovation Solution
A pump system with a controller that enables or disables spare pump devices based on the instructed refresh rate, allowing the system to provide sufficient current for operation at multiple refresh rates without the need for circuit redesign, by using a pump device and a spare pump assembly that can function independently to support normal and higher refresh rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the circuit structure is redesigned by metal option to enable spare pump devices for higher refresh rates, then the refresh rate capability is improved, but the device complexity and manufacturing complexity increase
Solution Approach 1:
The spare pump devices are designed to serve multiple functions: they can remain inactive during normal operation and be activated when higher refresh rates are needed. The same circuit structure supports both normal and high refresh rate modes without requiring redesign, as the spare pump devices can be selectively enabled or disabled based on operational requirements.
Solution Approach 2:
The system dynamically adjusts the configuration of pump devices based on the required refresh rate. The controller selectively activates or deactivates spare pump devices depending on whether normal or high refresh rate operation is needed, allowing the system to adapt its internal configuration without physical circuit changes.
2Speed
If spare pump devices are always enabled to support higher refresh rates, then the refresh rate capability is improved, but the power consumption and component usage efficiency worsen
Solution Approach 1:
The system dynamically controls the activation state of spare pump devices based on real-time operational requirements. When normal refresh rate is sufficient, spare pump devices remain disabled to minimize power consumption. When high refresh rate is required, the controller activates the appropriate number of spare pump devices to meet the demand.
Solution Approach 2:
The system changes the operational parameters of pump devices based on refresh rate requirements. The controller adjusts which pump devices are active and in what configuration, changing the system's operational state from using only the main pump device to using main plus spare pump devices when higher refresh rates are needed.
3Adaptability or versatility
If the circuit structure is redesigned to utilize spare pump devices, then the application flexibility is improved, but the ease of manufacture worsens
Solution Approach 1:
The circuit structure is designed with universal compatibility for both normal and high refresh rate operations. The same physical circuit layout and metal layers can support either operational mode by simply changing which pump devices are activated, eliminating the need for different circuit versions and simplifying manufacturing.
Solution Approach 2:
The spare pump devices are pre-configured in the circuit structure during manufacturing, but their activation is determined later based on application requirements. This preliminary configuration allows the hardware to be manufactured once with all components in place, while the actual utilization pattern is decided through software or controller configuration after manufacturing.
Data Source
AI summary
The present disclosure provides a pump system of a DRAM and a method for operating the same. The pump system includes a pump device and a spare pump assembly. The pump device provides a current sufficient to allow a bank of the DRAM to operate at a normal refresh rate without other spare pump devices in response to a normal instruction which indicates that the bank is instructed to operate at the normal refresh rate. The spare pump assembly includes a first spare pump device configured to provide, in combination with the pump device, a current sufficient to allow the bank to operate at a first refresh rate greater than the normal refresh rate in response to a first instruction which indicates that the bank is instructed to operate at the first refresh rate.