RF Bias Current Adaptation for Multi-Band Wireless Power Reduction
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Solution Overview
Problem
Wireless devices face significant challenges in reducing power consumption, particularly when operating on multiple frequency bands, as existing technologies fail to efficiently adapt to varying carrier frequencies, leading to increased battery drain.
Innovation Solution
The method involves dynamically adapting the bias current of active devices, modifying resistance values, optimizing clock frequencies, adjusting voltage supplies, and enhancing DC/DC converter efficiency to match the RF carrier frequency, thereby reducing power consumption across various components such as amplifiers, rectifiers, and antenna tuners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the wireless device operates on multiple frequency bands to improve communication versatility, then the adaptability is improved, but the power consumption increases
Solution Approach 1:
The patent implements dynamic adaptation of bias currents to match the operating frequency band. The system continuously monitors the carrier frequency and adjusts the bias currents of active devices in real-time, transitioning from static to dynamic operation to optimize power consumption across different frequency bands
Solution Approach 2:
The patent changes the bias current parameter based on the operating frequency band. By modifying the bias current values according to the specific frequency band being used, the system optimizes the operating point of active devices to minimize power consumption while maintaining required performance levels
2Reliability
If the bias current is increased to maintain constant gain at higher frequencies, then the signal quality is improved, but the power consumption increases
Solution Approach 1:
The patent systematically adjusts the bias current parameter as a function of operating frequency. At higher frequencies, the bias current is increased to maintain adequate signal quality and constant gain, while at lower frequencies, the bias current is reduced to minimize power consumption, creating an optimized trade-off curve across the frequency spectrum
3Stability of the object's composition
If the resistance values are switched to maintain constant gain when bias current is modified, then the signal stability is improved, but the device complexity increases
Solution Approach 1:
The patent segments the biasing network into multiple parallel paths, each with different resistance values. Switches are used to select appropriate resistance segments based on the operating frequency band, allowing the system to maintain constant gain across frequency changes while managing complexity through modular segmentation of the biasing circuit
Data Source
AI summary
An embodiment of the present invention provides a method, comprising reducing power consumption in a wireless device by adapting the bias current of active devices in the apparatus to the RF carrier frequency of the wireless device.