DC-DC Converter LUT Configuration for RF PA Power Supply
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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 increased size, power consumption, and cost, while maintaining performance requirements.
Innovation Solution
The implementation of RF power amplifier (PA) circuitry with a DC-DC converter and look-up table (LUT) structure for flexible configuration, allowing for dynamic and static operating conditions, enabling efficient power supply management and reduced complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional multi-mode multi-band RF communications devices use complex circuitry to support various communication modes and frequency bands, then performance requirements are maintained, but device size, power consumption, and cost increase
Solution Approach 1:
The patent implements a universal DC-DC converter design that can operate in multiple modes (buck, boost, buck-boost) and support various communication frequency bands through a single integrated circuit. The converter uses a unified control architecture with mode-selectable switching networks that allow the same hardware to serve multiple functions across different operating conditions, eliminating the need for separate dedicated circuits for each mode or frequency band.
Solution Approach 2:
The patent employs dynamic switching control that automatically transitions between different converter modes (buck, boost, buck-boost) based on real-time operating conditions such as input voltage, output voltage, and load requirements. The control circuit dynamically adjusts switching frequencies, duty cycles, and circuit topology to optimize performance for each specific operating scenario, allowing the system to adapt rather than requiring fixed complex circuitry for all possible modes.
2Reliability
If traditional multi-mode multi-band RF communications devices use complex circuitry to support various communication modes and frequency bands, then performance requirements are maintained, but device size increases
Solution Approach 1:
The patent merges multiple previously separate functions into a single integrated DC-DC converter module. The design combines voltage regulation, current control, mode selection, and frequency band adaptation into one unified circuit block, significantly reducing the overall device volume compared to having separate dedicated circuits for each communication mode and frequency band.
Solution Approach 2:
The universal converter architecture performs multiple functions (buck conversion, boost conversion, buck-boost conversion, voltage regulation, current limiting) within a single device footprint. By making the circuitry multi-functional rather than dedicated to single modes, the patent achieves the same performance coverage with substantially reduced device size.
3Reliability
If traditional multi-mode multi-band RF communications devices use complex circuitry to support various communication modes and frequency bands, then performance requirements are maintained, but power consumption increases
Solution Approach 1:
The patent implements dynamic power management that adjusts the converter operating parameters (switching frequency, duty cycle, mode selection) in real-time based on actual power requirements. The control circuit monitors load conditions and automatically transitions to the most energy-efficient operating mode for each specific condition, preventing unnecessary power consumption that would occur with fixed complex circuitry operating in all modes simultaneously.
Solution Approach 2:
The patent changes key operating parameters (switching frequency, inductance value, capacitance value) dynamically based on the required communication mode and frequency band. By adjusting these parameters rather than using fixed complex circuitry, the system achieves optimal power efficiency for each operating condition while maintaining performance requirements.
4Reliability
If traditional multi-mode multi-band RF communications devices use complex circuitry to support various communication modes and frequency bands, then performance requirements are maintained, but cost increases
Solution Approach 1:
The patent designs a universal DC-DC converter that can be manufactured as a single standardized component supporting all required communication modes and frequency bands. This eliminates the need to manufacture and inventory multiple different circuit variants, reducing manufacturing complexity, assembly costs, and testing requirements while maintaining full performance coverage across all modes.
Solution Approach 2:
By merging multiple functions into a single integrated converter module, the patent reduces the total component count, assembly steps, and manufacturing complexity. The unified design allows for economies of scale in production and simplifies quality control and testing procedures compared to manufacturing separate dedicated circuits for each mode.
Data Source
AI summary
RF PA circuitry and a DC-DC converter, which includes an RF PA envelope power supply and DC-DC control circuitry, are disclosed. The PA envelope power supply provides an envelope power supply signal to the RF PA circuitry. The DC-DC control circuitry has a DC-DC look-up table (LUT) structure, which has at least a first DC-DC LUT. The DC-DC control circuitry uses DC-DC LUT index information as an index to the DC-DC LUT structure to obtain DC-DC converter operational control parameters. The DC-DC control circuitry then configures the PA envelope power supply using the DC-DC converter operational control parameters. Using the DC-DC LUT structure provides flexibility in configuring the DC-DC converter for different applications, for multiple static operating conditions, for multiple dynamic operating conditions, or any combination thereof.