Voltage Generation Circuit Node Discharge for Memory Stability
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Solution Overview
Problem
Semiconductor memory apparatuses face challenges in maintaining a stable internal voltage level due to variations in process, voltage, and temperature conditions, leading to reduced operating speed and potential drops in internal voltage, which existing voltage generation circuits struggle to address promptly.
Innovation Solution
A voltage generation circuit comprising a comparison unit, an output unit, and a control unit that compares a reference voltage to a feedback voltage, generates an internal voltage, and discharges the node when the internal voltage drops below a preset level, ensuring rapid regeneration of the internal voltage without relying on comparison signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional voltage generation circuit is used to convert external voltage to internal voltage, then the circuit can operate with basic voltage conversion capability, but the internal voltage level becomes unstable under PVT variations and may drop below required levels
Solution Approach 1:
The patent implements a feedback mechanism where the internal voltage is continuously monitored and compared against a reference voltage. When the internal voltage drops below the reference level, the comparison unit generates a reset signal that triggers the output unit to rapidly regenerate the internal voltage, ensuring stable operation under PVT variations
Solution Approach 2:
The patent uses a discharge unit that proactively discharges the internal voltage to a predetermined level before critical failure occurs. This preliminary action prevents the internal voltage from dropping too low, allowing the feedback mechanism to respond more effectively and maintain stable operation
2Speed
If the voltage generation circuit operates normally without intervention, then power consumption is reduced, but when internal voltage drops the regeneration speed is delayed and operating speed decreases
Solution Approach 1:
The patent implements a rapid regeneration mechanism where, upon detecting internal voltage drop, the output unit immediately regens the internal voltage to a predetermined level without waiting for gradual recovery. This rushing through of the voltage regeneration process significantly reduces response time and prevents operating speed degradation
3Reliability
If no discharge control is implemented, then the circuit structure remains simple, but the internal voltage cannot be rapidly restored when it drops below preset levels
Solution Approach 1:
The patent implements a self-service mechanism where the voltage generation circuit automatically monitors its own internal voltage level and triggers regeneration when needed. The comparison unit continuously compares internal voltage against reference voltage and autonomously generates reset signals, eliminating the need for external control while maintaining reliable voltage levels
Data Source
AI summary
A voltage generation circuit may include: a comparison unit configured to compare a reference voltage and a feedback voltage and output a comparison signal to a node; an output unit configured to generate an internal voltage and the feedback voltage according to a voltage level applied to the node; and a control unit configured to discharge the node when a level of the internal voltage drops to less than a preset level.