Power Gating Circuit Voltage Switching During Power-Up
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Semiconductor devices in portable electronic devices face challenges in efficiently managing power consumption through power gating operations, as existing technologies struggle to effectively switch between different voltage levels during the power-up period and mode register set operations.
Innovation Solution
A device comprising a switch control signal generation circuit and a power gating circuit that generates and controls switch control signals based on comparisons of power source voltages, allowing the device to drive the power source voltage to either a high or low level depending on the mode signal, optimizing power consumption by adjusting voltage levels according to frequency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If power gating operation is performed to reduce power consumption, then energy efficiency is improved, but voltage level switching control during power-up period becomes complex
Solution Approach 1:
The power gating circuit autonomously determines whether to switch voltage levels by comparing power source voltages itself, eliminating the need for external control signals during power-up period. The circuit generates its own control signals based on voltage comparison results, achieving self-service operation that reduces overall system complexity while maintaining power savings.
Solution Approach 2:
The voltage comparison operation is performed in advance during the power-up period to determine the appropriate voltage level before mode register set operations begin. This preliminary voltage assessment enables the circuit to pre-configured the correct voltage state, avoiding complex real-time switching control during critical initialization phases.
2Use of energy by moving object
If voltage level switching is implemented to optimize power consumption, then energy efficiency is improved, but control signal generation complexity increases
Solution Approach 1:
The voltage comparison circuit serves multiple functions: it determines voltage levels for power gating control, generates control signals for switch operation, and provides timing information for power-up period management. This multi-functionality consolidates what would otherwise require separate control circuits, reducing overall control signal generation complexity while achieving power optimization.
Solution Approach 2:
The voltage comparison result acts as an intermediary signal that bridges the power source voltage levels and the control signals needed for power gating operation. Instead of requiring complex direct control logic, the comparison result mediates the decision-making process, simplifying control signal generation by providing a clear binary outcome that directly drives the switching operation.
3Use of energy by moving object
If power source voltage is dynamically switched between high and low levels, then power consumption is reduced, but voltage stability during mode register set operation may be compromised
Solution Approach 1:
The power gating circuit implements dynamic voltage switching that adapts to operational requirements. During mode register set operations, the circuit maintains stable voltage levels by controlling switch timing based on voltage comparison results obtained during the power-up period. This dynamic control ensures voltage stability during critical operations while enabling power savings during normal operation.
Solution Approach 2:
The voltage comparison circuit provides continuous feedback about power source voltage levels to the power gating control logic. This feedback mechanism ensures that voltage switching decisions are based on actual voltage conditions, preventing unstable switching during mode register set operations and maintaining reliable voltage levels when needed while still achieving power consumption reduction.
Data Source
AI summary
A device performing a power gating operation includes a switch control signal generation circuit and a power gating circuit. The switch control signal generation circuit controls an operation that generates a first switch control signal and a second switch control signal from a mode signal based on a comparison result of a first power source voltage and a second power source voltage until a mode register set operation is performed after a power-up period ends. The power gating circuit drives a power source voltage to the first power source voltage or the second power source voltage based on the first switch control signal and the second switch control signal.