RF Power Supply Switching for APT and ET Mode Support
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Solution Overview
Problem
Current solutions for generating power supply signals for radio frequency power amplifiers in cellular transceiver systems are either costly and space-intensive or limited to a single operating mode, failing to efficiently support both average power tracking (APT) and envelope tracking (ET) modes, especially in scenarios with carrier aggregation.
Innovation Solution
An apparatus with a switching circuit that couples multiple power supply circuits to generate either APT or ET power supply signals, allowing flexible operation and efficient power management by decoupling power amplifiers to run in either mode based on the switching circuit's configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two full RF PMICs are used to generate both APT and ET power supply signals, then the system can support both operating modes, but material costs and PCB area usage increase
Solution Approach 1:
The patent implements a single RF PMIC that can generate both APT and ET power supply signals by reconfiguring its internal voltage regulator and tracker circuitry. The voltage regulator can operate in APT mode to generate APT signals, while the tracker circuitry can be configured to generate ET signals. This multi-functional design eliminates the need for separate PMICs for each signal type, reducing PCB area and material costs while maintaining full operational versatility.
Solution Approach 2:
The patent employs dynamic reconfiguration of the power supply circuitry within the RF PMIC, allowing the system to switch between APT and ET modes based on current operational requirements. The voltage regulator and tracker components can be dynamically adjusted or reconfigured to produce the appropriate power supply signal type, enabling adaptability without requiring fixed, dedicated hardware for each mode.
2Area of stationary object
If a full tracker is extended by adding a voltage regulator to generate APT signal, then PCB area and costs are reduced, but power amplifiers can operate in APT mode only
Solution Approach 1:
The patent designs the RF PMIC with integrated circuitry that can perform both APT and ET functions. The voltage regulator and tracker are implemented as reconfigurable blocks within the same PMIC, allowing a single device to provide both APT and ET power supply signals to power amplifiers. This ensures operating mode flexibility is maintained while achieving PCB area reduction through integration.
Solution Approach 2:
The patent implements dynamic mode switching capability within the RF PMIC, allowing the power supply generation to transition between APT and ET modes based on system requirements. The internal circuitry can be reconfigured in real-time to generate the appropriate signal type, ensuring that power amplifiers can operate in either mode as needed without being locked into a single operating mode.
3Area of stationary object
If a single RF PMIC is designed to generate both APT and ET signals through reconfigurable circuitry, then PCB area and material costs are reduced, but circuit complexity increases
Solution Approach 1:
The patent combines the APT voltage regulator circuitry and the ET tracker circuitry into a single integrated RF PMIC device. By merging these previously separate functions into one chip with shared resources and reconfigurable blocks, the design reduces overall system complexity despite the multi-functional capability. The integration allows common components to be shared between APT and ET modes, offsetting the complexity of supporting both modes.
Data Source
AI summary
A power supply apparatus including a signal generator circuit configured to generate a plurality of power supply signals via at least one DC-to-DC converter, the plurality of power supply signals including a first power supply signal on a first output path and a second power supply signal on a second output path that is independent of the first output path, the first power supply signal being different from the second power supply signal. The apparatus includes a switching circuit to provide during a first operating mode, a first combined power supply signal on the first output path based on the first power supply signal and a third power supply signal of the plurality of power supply signals. The switching circuit provides during a second operating mode, a second combined power supply signal on the second output path based on the second power supply signal and the third power supply signal.