Multi-mode RF Circuitry with Shared Bias Generators
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Solution Overview
Problem
Current RF circuitry for wireless communications devices is unable to efficiently support multiple carrier networks (2G, 3G, and 4G) due to separate hardware requirements, leading to size constraints and inefficiencies, particularly in providing adequate power for 2G networks.
Innovation Solution
The RF circuitry employs a configuration with multiple RF power amplifiers and bias signal generators, allowing for shared bias signal provision across different carrier networks, eliminating the need for separate high-power bias signal generators by operating in modes that optimize power usage and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate hardware is used for 3G/4G and 2G carrier networks, then each network can be supported with dedicated circuitry, but the overall device size increases and hardware complexity increases
Solution Approach 1:
The patent combines multiple RF power amplifiers (first, second, and third RF power amplifiers) and multiple bias signal generators (first and second bias signal generators) into a single integrated RF circuitry block that can support multiple carrier networks (3G, 4G, and 2G) through different operational modes, eliminating the need for separate hardware for each network type
Solution Approach 2:
The RF circuitry is designed with multi-functionality to operate in different modes: first mode for 3G/4G networks using the first and second RF power amplifiers, and second mode for 2G networks using the third RF power amplifier. The same bias signal generators serve multiple purposes across different operational modes, making the hardware universal rather than network-specific
2Power
If separate high power bias signal generator circuitry is used for 2G carrier network, then adequate power for amplification is provided, but the hardware size and device complexity increase
Solution Approach 1:
The patent merges the first bias signal generator and second bias signal generator into a unified power supply system that can collectively provide the high power needed for 2G network operation through the third RF power amplifier, eliminating the need for a separate dedicated high-power bias signal generator
Solution Approach 2:
The RF circuitry operates dynamically in different modes depending on the carrier network being used. In the second mode for 2G networks, the circuitry leverages the combined output of both bias signal generators to dynamically provide the necessary high power levels, rather than requiring a permanently configured high-power system
Data Source
AI summary
Circuitry includes a first RF power amplifier, a second RF power amplifier, a third RF power amplifier, a first bias signal generator, and a second bias signal generator. The first RF power amplifier and the second RF power amplifier are each configured to amplify RF signals for transmission in a first carrier network. The third RF power amplifier is configured to amplify RF signals for transmission in a second carrier network. In a first mode, the first bias signal generator provides a bias signal to the first RF power amplifier and the second bias signal generator provides a bias signal to the second RF power amplifier. In a second mode, the first bias signal generator and the second bias signal generator each provide a portion of a bias signal to the third RF power amplifier.