Functional Block Power Control via Wake-Up Guard Time
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Solution Overview
Problem
Conventional electronic devices lack flexibility in reducing power consumption as they either keep all circuit components in a normal mode or power-saving mode, failing to individually control functional blocks based on their unique wake-up guard time requirements, which limits power-saving performance, especially in portable devices like cellular phones with wireless communication receivers.
Innovation Solution
An electronic device with a control circuit that selectively controls functional blocks to switch between normal and power-saving modes based on their individual wake-up guard time requirements, allowing for independent management of power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If all circuit components are controlled to enter power-saving mode together, then power consumption is reduced, but flexibility in power management is lost
Solution Approach 1:
The patent segments the wireless communication receiver into multiple independent functional blocks (e.g., FFT block, IDFT block, channel estimation block, equalization block), each capable of independently entering or exiting power-saving mode based on its own wake-up guard time requirements. This segmentation allows selective power management of individual blocks rather than controlling all components uniformly, thereby improving power consumption while maintaining the flexibility to adapt to different operational scenarios.
2Use of energy by moving object
If functional blocks are individually controlled to enter power-saving mode, then power-saving performance is improved, but control complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing wake-up guard time requirements for each functional block before power-saving mode activation. The control circuit refers to these pre-established parameters to make rapid mode switching decisions, avoiding complex real-time calculations. This approach improves power-saving performance through individualized control while minimizing the increase in control complexity by relying on pre-computed data.
3Measurement precision
If wake-up guard time requirements are considered for each functional block, then power management precision is improved, but system complexity increases
Solution Approach 1:
The patent implements local quality by assigning specific wake-up guard time requirements to each functional block based on its individual characteristics and operational needs. Rather than applying a uniform power management approach, the system tailors the power-saving mode activation criteria to each block's local requirements. This precision in power management is achieved while controlling system complexity by maintaining a straightforward control structure that simply compares current operational needs against pre-defined block-specific thresholds.
Data Source
AI summary
An electronic device includes a first functional block, a second functional block, and a control circuit. The first functional block has a first wake-up guard time requirement. The second functional block has a second wake-up guard time requirement which is different from the first wake-up guard time requirement. The control circuit is coupled to the first functional block and the second functional block, and implemented for selectively controlling the first functional block to switch from a normal mode to a power-saving mode by referring to the first wake-up guard time requirement, and selectively controlling the second functional block to switch from the normal mode to the power-saving mode by referring to the second wake-up guard time requirement.