Reference Voltage Generator with Dynamic Feedback for Fast Recovery
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Solution Overview
Problem
Reference voltage generators with high resistor values experience prolonged recovery times when the reference voltage deviates, leading to unstable voltage supply due to transient current coupling, especially in loads like output drivers of IO circuits.
Innovation Solution
A reference voltage generator employing positive feedback mechanisms with p-channel and n-channel transistors, where feedback voltages adjust switch conductance to efficiently restore the reference voltage to its base value, utilizing p-channel and n-channel transistors connected between power supply terminals and a reference voltage output node.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If high resistance values are used in the reference voltage generator, then static current is reduced to acceptable levels, but the recovery time becomes significantly long when reference voltage deviates
Solution Approach 1:
The patent applies dynamics by making the resistance values time-dependent. During normal operation, high resistance values are maintained to minimize static current. When a deviation is detected (transient current event), the resistance values are dynamically reduced to accelerate recovery. This is achieved through control circuitry that adjusts the resistance of resistors R1 and R2 based on detected voltage deviations, allowing the system to transition between low-power and fast-recovery states.
Solution Approach 2:
The patent implements feedback mechanisms to detect deviations in reference voltage and trigger appropriate responses. Monitoring circuitry continuously observes the reference voltage output and activates resistance reduction when deviations are detected, creating a closed-loop control system that balances power consumption and recovery performance based on real-time conditions.
2Loss of energy
If high resistance values are used to reduce static current, then power consumption is minimized, but transient current coupling through load capacitance causes prolonged voltage deviation
Solution Approach 1:
The system dynamically adjusts resistance values based on operational conditions. During steady-state operation with no transient events, high resistance values minimize power consumption. When transient current coupling occurs and voltage stability is compromised, the resistance values are reduced to strengthen the reference voltage generator's ability to counteract load effects and restore voltage quickly.
Solution Approach 2:
The patent changes the resistance parameter dynamically in response to detected voltage deviations or transient events. By adjusting the resistance values of R1 and R2 from high to low states, the system adapts its electrical characteristics to maintain voltage stability during critical moments while preserving low power consumption during normal operation.
3Loss of energy
If resistor values are increased to minimize static current, then energy loss is reduced, but the reference voltage cannot return to base value quickly when disturbed
Solution Approach 1:
The patent makes the resistance values dynamic rather than static. High resistance values are used during normal operation to minimize energy loss, but when voltage restoration is needed, the resistance values are reduced to increase the current available for restoring the reference voltage to its base value, thereby improving productivity during recovery events.
Solution Approach 2:
The system prepares for potential voltage deviations by having pre-configured low-resistance paths available. When a deviation is detected, these paths are activated immediately to provide the necessary current for rapid restoration, preventing prolonged voltage errors without requiring continuously high current consumption.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively and efficiently restores the reference voltage to its base value, providing a stable and consistent output, even when deviations occur, by dynamically controlling switch conductance through feedback mechanisms.
Implementation Method 1
a first positive feedback module and a second positive feedback module. A first input node of the first positive feedback module is electrically connected to the reference voltage output node. An output node of the first positive feedback module is electrically connected to a control electrode of the first switch for providing a first feedback voltage to the control electrode of the first switch
Data Source
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AI summary
A reference voltage generator may include the following elements: a first power supply terminal configured to receive a first power supply voltage; a second power supply terminal configured to receive a second power supply voltage; a reference voltage output node configured to provide a reference voltage; a first switch electrically connected between the first power supply terminal and the reference voltage output node; a second switch electrically connected between the second power supply terminal and the reference voltage output node; a first positive feedback module electrically connected to both the reference voltage output node and the first switch and configured to provide a first feedback voltage to the first switch; and a second positive feedback module electrically connected to both the reference voltage output node and the second switch and configured to provide a second feedback voltage to the second switch.