Half Bit Line Voltage Generator Offset Compensation
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Solution Overview
Problem
Memory devices, such as DRAM, experience increased standby current due to cross currents caused by mismatch or offset voltages in push-pull type voltage generators, leading to higher power consumption.
Innovation Solution
A half bit line high level voltage generator comprising a control module, a driving module, and a detecting module that generates control signals to adjust the driving module and reduce cross currents by detecting offset voltages between amplifiers, thereby minimizing standby current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a push-pull type voltage generator is used to generate half bit line high level voltage, then the voltage generation function is achieved, but mismatch or offset voltage causes cross current which increases standby current and power consumption
Solution Approach 1:
The patent implements a feedback mechanism by detecting the cross current in the push-pull voltage generator and using this detection to dynamically adjust the operation. The detecting module monitors the cross current, and based on the detection result, the control module adjusts the control signals to the driving module to minimize or eliminate the cross current, thereby reducing standby power consumption while maintaining stable voltage generation.
2Loss of energy
If offset voltage is not compensated in the push-pull voltage generator, then the circuit structure remains simple, but cross current increases standby current
Solution Approach 1:
The patent adds a detecting module that monitors cross current and feeds this information back to the control module. This feedback loop enables dynamic compensation for offset voltage effects without requiring complex hardware modifications to the basic push-pull structure. The control module uses the feedback signal to adjust control signals, thereby reducing energy loss while keeping the overall circuit structure relatively simple.
Solution Approach 2:
The patent introduces a detecting module as an intermediary component that bridges the gap between the simple push-pull voltage generator and the requirement for cross current reduction. This intermediary module detects cross current conditions and enables adaptive control without fundamentally changing the core voltage generation circuitry, thus reducing energy loss while maintaining structural simplicity.
3Productivity
If cross current is not reduced, then the voltage generation process remains straightforward, but standby current increases power consumption
Solution Approach 1:
The patent employs feedback control where the detecting module continuously monitors cross current and provides feedback to the control module. This enables real-time optimization of the voltage generation process, improving efficiency by eliminating wasteful cross current while maintaining the ability to generate half bit line high level voltage on demand.
Solution Approach 2:
The patent transforms the static push-pull voltage generator into a dynamic system by adding control signals that can adapt to detected cross current conditions. The control module dynamically adjusts the operating state of the driving module based on feedback, enabling the system to optimize its performance and reduce standby power consumption while maintaining voltage generation capability.
Data Source
AI summary
A half bit line high level voltage generator, a memory device and a driving method are disclosed herein. The half bit line high level voltage generator includes a control module, a driving module and a detecting module. The control module is configured for generating a first control signal and a second control signal in accordance with an update signal and a half bit line high level voltage. The driving module is configured for generating a half bit line high level voltage to a memory device in accordance with the first control signal and the second control signal. The detecting module is configured for detecting whether a cross current flows through the driving module, and accordingly generating the update signal to adjust the driving module to reduce the cross current.