Termination Voltage Regulation Transient Response Enhancement
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Solution Overview
Problem
Existing termination voltage regulators for memory bus termination suffer from inadequate transient response, leading to potential system instability or crashes due to overshoot and undershoot issues, necessitating improvements in operation speed.
Innovation Solution
A termination voltage regulation apparatus with transient response enhancement, comprising a termination voltage regulator and a transient response enhancer, which includes first and second switching units and enhancement circuits that sense signals to adjust control terminals, enabling faster mode transitions and reducing voltage overshoot and undershoot by setting control terminals to specific voltages in advance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the termination voltage regulator operates at higher speed to improve transient response, then the transient response is improved, but voltage overshoot and undershoot increase causing system instability
Solution Approach 1:
The patent applies preliminary action by predicting the direction of current change (sourcing or sinking mode) in advance and pre-adjusting the control terminals of the switching units before the actual mode transition occurs. The transient response enhancer senses the control signal from the termination voltage regulator and proactively sets the control terminals to appropriate voltage levels, allowing the switching units to respond faster without causing excessive overshoot or undershoot, thus resolving the contradiction between speed and stability
2Speed
If the termination voltage regulator increases operation speed, then transient response is enhanced, but voltage control precision deteriorates due to overshoot and undershoot
Solution Approach 1:
The transient response enhancer performs preliminary action by pre-setting the control terminals to appropriate voltage levels based on the predicted mode transition direction. This proactive adjustment ensures that when the switching units change state, they do so with proper voltage headroom, preventing both overshoot (which would indicate too much voltage) and undershoot (which would indicate insufficient voltage), thereby maintaining voltage control precision while enabling faster operation
Solution Approach 2:
The patent implements feedback by having the transient response enhancer sense the control signal from the termination voltage regulator and use this information to adjust the control terminals of the switching units. This closed-loop approach ensures that the voltage adjustments are responsive to actual system conditions, maintaining precision while improving transient response speed
Data Source
AI summary
A termination voltage regulation apparatus with transient response enhancement includes a termination voltage regulator and a transient response enhancer. The termination voltage regulator provides a termination voltage at a termination voltage terminal, including first and second switching units. The transient response enhancer, coupled to the termination voltage regulator, is utilized for enhancing transient response of the termination voltage regulator, including a first enhancement circuit for sensing a first signal associated with the first switching unit and enabling a first control terminal of the first switching unit to be at a first voltage in response to the first signal in a sinking mode; and a second enhancement circuit for sensing a second signal associated with the second switching unit and enabling a second control terminal of the second switching unit to be at a second voltage in response to the second signal in a sourcing mode.