Voltage-Switched Power Amplifier for Multi-Mode RF Circuits
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Solution Overview
Problem
Existing communication systems require multiple power amplifiers to support different operation modes, leading to increased size and power consumption, as well as circuit mismatch issues.
Innovation Solution
A power amplifier with a power switching circuit that provides different voltages to a driver circuit and an amplifier circuit, allowing the same circuits to be used for various operation modes, reducing size and power consumption while avoiding circuit mismatch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two different amplifiers are disposed in the communication system to support different operation modes, then the communication system can realize multiple operation modes, but the size and power consumption increase
Solution Approach 1:
The patent applies universality by designing a single power amplifier that can operate in multiple modes (Wi-Fi and Bluetooth) by switching between different voltage supplies. The same amplifier circuit is used for both modes, eliminating the need for separate amplifiers and reducing overall power consumption while maintaining multi-mode support capability
2Adaptability or versatility
If two different amplifiers are disposed in the communication system to support different operation modes, then the communication system can realize multiple operation modes, but the size increases
Solution Approach 1:
The patent implements universality by creating a single power amplifier circuit that serves multiple operation modes through voltage switching. This eliminates the need for separate amplifier circuits for Wi-Fi and Bluetooth modes, thereby reducing the overall circuit area while maintaining the ability to support different operation modes
3Adaptability or versatility
If two different amplifiers are disposed in the communication system to support different operation modes, then the communication system can realize multiple operation modes, but circuit mismatch issues occur
Solution Approach 1:
The patent resolves circuit mismatch issues by using a single universal amplifier circuit for both Wi-Fi and Bluetooth modes, eliminating the interface and matching problems that arise when connecting different amplifier types. The same circuit architecture ensures consistent performance characteristics across different operation modes
Solution Approach 2:
The patent applies parameter changes by switching the voltage supply parameter to different values (first voltage for Wi-Fi mode, second voltage for Bluetooth mode) rather than changing the amplifier circuit itself. This allows the same circuit to adapt to different modes through parameter adjustment, avoiding the mismatch issues inherent in using different circuits
Data Source
AI summary
A power amplifier includes a power switching circuit, a driver circuit, and an amplifier circuit. The power switching circuit is configured to receive a first voltage and a second voltage, and provide the first voltage or the second voltage according to an operation mode of the power amplifier. The driver circuit is coupled to the power switching circuit. The driver circuit is configured to operate according to the first voltage or the second voltage and generate a driving signal according to an input signal. The amplifier circuit is coupled to the power switching circuit and the driver circuit. The amplifier circuit is configured to operate according to the first voltage or the second voltage and generate an output signal according to the driving signal.