Leakage Compensation Circuit for Stable Internal Voltage in Power-Down
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Solution Overview
Problem
Semiconductor integrated circuit devices face current leakage issues during power-down mode, leading to abnormal operations in active mode, as existing technologies fail to effectively maintain voltage levels and compensate for temperature-induced leaks.
Innovation Solution
Incorporating a current leakage detector, leakage compensation pulse generator, and leakage compensation voltage generator to compare internal and reference voltage signals, generate compensation signals based on temperature and leakage state, and control clock pulse width and period to stabilize internal voltage levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the device enters power-down mode to save energy, then energy consumption is reduced, but current leakage occurs leading to voltage level degradation
Solution Approach 1:
The patent applies preliminary action by detecting current leakage early during power-down mode and generating compensation signals before the voltage degradation affects circuit operation. The leakage detector continuously monitors voltage levels and triggers compensation pulses proactively to maintain stable internal voltages throughout the power-down period.
Solution Approach 2:
The patent implements feedback through a closed-loop system where the leakage detector monitors internal voltage signals, compares them against reference levels, and feeds this information back to the leakage compensation pulse generator. This feedback mechanism enables real-time adjustment of compensation pulses to counteract ongoing current leakage and maintain voltage stability.
2Use of energy by moving object
If existing power-down techniques are used, then energy saving is achieved, but abnormal operations occur in active mode due to voltage degradation
Solution Approach 1:
The compensation mechanism performs preliminary action by restoring voltage levels during power-down mode before the device transitions to active mode. This ensures that when normal operation resumes, the internal voltages are already stabilized, preventing abnormal operations and eliminating the need for lengthy voltage recovery periods.
Solution Approach 2:
The feedback system continuously monitors voltage degradation trends during power-down mode and adjusts compensation pulse parameters accordingly. This ensures that voltage levels are maintained within acceptable ranges, guaranteeing normal operation upon transition to active mode while preserving energy savings.
3Device complexity
If no compensation mechanism is implemented, then device complexity is low, but temperature-induced current leakage causes voltage instability
Solution Approach 1:
The patent applies segmentation by dividing the voltage stabilization function into separate specialized modules: a leakage detector for monitoring, a compensation pulse generator for correction, and a temperature sensor for environmental compensation. This modular segmentation achieves reliable temperature-induced leakage compensation while keeping each component relatively simple and manageable.
Solution Approach 2:
The patent introduces intermediary components including reference voltage signals for comparison, temperature state signals for environmental compensation, and clock pulse signals for timing control. These intermediaries enable the system to detect and compensate for temperature-induced leakage without requiring complex direct control mechanisms.
Data Source
AI summary
A semiconductor integrated circuit device includes a current leakage detector, a leakage compensation pulse generator, and a leakage compensation voltage generator. The current leakage detector is configured to compare an internal voltage signal with a plurality of reference voltage signals with different levels to generate a current leakage state signal. The leakage compensation pulse generator is configured to generate a bias level compensation signal based on the current leakage state signal and a temperature state signal. The leakage compensation voltage generator is configured to generate the internal voltage signal based on the bias level compensation signal.