Power Gating Control Circuit for Read-Write Power-Down Timing
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Solution Overview
Problem
Semiconductor apparatuses face challenges in optimizing operation performance and reducing power consumption, particularly in portable devices where limited power sources necessitate minimizing unnecessary power usage.
Innovation Solution
A power gating control circuit is introduced, comprising operational period signal, period termination detecting, power gating period signal, and power gating control signal generating circuits, which generate signals to control power supply to circuit groups based on operational modes, enabling efficient entry into and exit from power-down modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If power gating control circuit is implemented to reduce power consumption, then battery life is extended, but device complexity increases
Solution Approach 1:
The power gating control circuit is divided into multiple functional modules: an operational period signal generating circuit that generates signals based on internal clocks and command shifts, a period termination detecting circuit that detects when operations complete, and a power gating control signal generating circuit that produces control signals for power supply switching. This segmentation allows each module to perform a specific function, reducing overall circuit complexity while achieving effective power management.
Solution Approach 2:
The operational period signal generating circuit proactively generates operational period signals in advance based on internal clock signals and command shift signals. This preliminary action enables the system to prepare power gating control signals before power consumption occurs, allowing for more efficient power management without adding complex real-time control logic.
2Use of energy by moving object
If power supply is selectively controlled to reduce power consumption, then battery life is extended, but operation performance may be degraded
Solution Approach 1:
The period termination detecting circuit continuously monitors operational status and generates termination signals when write or read operations complete. This feedback mechanism ensures that power gating control signals are generated at the appropriate moments, preventing premature power cutoff that would degrade performance while still achieving power savings during idle periods.
Solution Approach 2:
The power gating control circuit dynamically adjusts power supply timing based on real-time operational status. By generating power gating control signals that coordinate with ongoing write and read operations, the system optimizes the balance between power consumption and operation performance, ensuring power is supplied when needed and cut off when operations complete.
Data Source
AI summary
A power gating control circuit includes an operational period signal generating circuit, a period termination detecting circuit, a power gating period signal generating circuit and a power gating control signal generating circuit. The operational period signal generating circuit generates a plurality of operational period signals based on internal clock signals and one or more of command shift signals. The period termination detecting circuit generates a write period termination signal and a read period termination signal based on the command signals and the plurality of operational period signals. The power gating period signal generating circuit generates a first power gating period signal and a second power gating period signal based on the write period termination signal, the read period termination signal and remaining command shift signals other than the one or more command shift signals. The power gating control signal generating circuit generates a plurality of power gating control signals based on the first power gating period signal, the second power gating period signal, and other signals to control entry into and exit from a power-down mode of a semiconductor apparatus.