RF PA Bias Control for Multislot Burst Power Drift
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Solution Overview
Problem
Traditional multi-mode multi-band RF communications devices require complex and costly circuitry to support various communication modes and frequency bands, leading to size, cost, and power consumption issues in portable devices.
Innovation Solution
The implementation of PA control and bias circuitry that dynamically adjusts output power levels and bias levels during multislot transmit bursts to maintain efficiency and reduce power drift, using a combination of PA control circuitry and bias circuitry to manage power levels and configurations based on power drop limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional multi-mode multi-band RF communications devices use complex circuitry to support various wireless communications protocols, then protocol compatibility is improved, but device complexity and cost increase
Solution Approach 1:
The patent implements a universal RF PA circuitry design that can operate in multiple modes (linear and non-linear) and support multiple frequency bands through a single integrated architecture. The circuitry uses mode selection signals and band selection signals to configure the same hardware for different protocols, eliminating the need for separate dedicated circuits for each mode or band, thereby reducing overall device complexity while maintaining protocol compatibility
2Reliability
If traditional devices use separate circuitry for each duplex mode and frequency band, then mode-specific performance is improved, but device size increases
Solution Approach 1:
The patent merges multiple mode-specific and band-specific circuits into a single integrated RF PA circuitry block. The unified circuitry receives mode selection signals and band selection signals that configure it to operate appropriately for each specific mode (half-duplex, full-duplex) and frequency band combination, achieving mode-specific performance through software/control configuration rather than through separate dedicated hardware circuits, thereby significantly reducing device size
3Adaptability or versatility
If traditional multi-mode multi-band devices support multiple protocols, then communication flexibility is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic power management in the RF PA circuitry by using mode selection signals and band selection signals to configure the circuitry for optimal efficiency in each operating condition. The circuitry can dynamically switch between linear mode and non-linear mode operation, and adjust its configuration based on the selected frequency band, thereby optimizing power consumption for each specific communication protocol and band combination rather than operating at fixed high power levels for all modes
Data Source
AI summary
Power amplifier (PA) control circuitry and PA bias circuitry are disclosed. During one slot of a multislot transmit burst from radio frequency (RF) PA circuitry, the PA control circuitry selects one PA bias level of the RF PA circuitry and the RF PA circuitry has one output power level. The RF PA circuitry has a next output power level during an adjacent next slot of the multislot transmit burst. If the one output power level exceeds the next output power level by more than a power drop limit, then the PA control circuitry maintains the one PA bias level during the adjacent next slot. If the one output power level significantly exceeds the next output power level, but by less than the power drop limit, then the PA control circuitry selects a next PA bias level, which is less than the one PA bias level, during the adjacent next slot.