Multi-mode Power Amplifier Circuit with Segmented Modules

Solution Overview

Problem

Designing a power amplifying circuit that maintains high power efficiency during both high and low output power transmissions in wireless communication devices, which support multiple wireless transmission technologies, is challenging due to differing signal modulation requirements.

Innovation Solution

A multi-mode power amplifying circuit with a first and second power amplifying module, impedance matching circuits, and a switching circuit that selects between two output modes based on modulation, allowing the radio-frequency signal to be amplified and transmitted efficiently through either the first or second power amplifier, depending on the required output mode.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If a single power amplifier is designed for high power transmission, then high output power is achieved, but power efficiency deteriorates during low power transmission

Engineering Contradiction:

Improveoutput powerVSAvoidpower efficiency

Core Design Contradiction:

PowerVSUse of energy by moving object

Solution Approach 1:

The power amplifier is divided into two separate modules: a first power amplifier for high power transmission and a second power amplifier for low power transmission. Each module is optimized for its specific power range, allowing the system to maintain high power efficiency regardless of the transmission power level. The switching circuit selects which module to use based on the required output power.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically switches between different power amplifier modules based on the required output power level. The switching circuit adjusts the active amplifier module in real-time according to the transmission requirements, ensuring optimal power efficiency for both high and low power operations.

Inventive Principle:

Principle #15Dynamics

2Use of energy by moving object

If a single power amplifier is designed for low power transmission, then power efficiency is improved, but output power capability deteriorates for high power transmission

Engineering Contradiction:

Improvepower efficiencyVSAvoidoutput power

Core Design Contradiction:

Use of energy by moving objectVSPower

Solution Approach 1:

The power amplifier is divided into two separate modules: a first power amplifier for high power transmission and a second power amplifier for low power transmission. Each module is optimized for its specific power range, allowing the system to maintain high power efficiency regardless of the transmission power level. The switching circuit selects which module to use based on the required output power.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system dynamically switches between different power amplifier modules based on the required output power level. The switching circuit adjusts the active amplifier module in real-time according to the transmission requirements, ensuring optimal power efficiency for both high and low power operations.

Inventive Principle:

Principle #15Dynamics

3Adaptability or versatility

If the transmitter is designed to support multiple wireless transmission technologies, then adaptability is improved, but device complexity increases

Engineering Contradiction:

Improvemulti-mode supportVSAvoidcircuit complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The transmitter is designed with a universal power amplifying circuit that can support multiple wireless transmission technologies (Wi-Fi and Bluetooth) through a unified architecture. The dual-module power amplifier design with switching control provides multi-functionality, allowing the same circuit to adapt to different transmission modes without requiring separate dedicated amplifiers for each technology.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system achieves multi-mode support by changing operational parameters rather than adding separate hardware for each mode. The switching circuit changes the active power amplifier module based on the required transmission mode, and the impedance matching circuits adjust their characteristics to optimize performance for different technologies, thereby supporting multiple standards with a single unified circuit design.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS9484150B2Multi-mode power amplifying circuit, and multi-mode wireless transmission module and method thereof

Publication Date: 2016.11.01 REALTEK SEMICON CORP

AI summary

A multi-mode power amplifying circuit, and a multi-mode wireless transmission module and method thereof are provided. The multi-mode wireless transmission module includes the multi-mode power amplifying circuit and an antenna. In the multi-mode power amplifying circuit and the antenna, a first power amplifier is electrically connected between a signal input end and a first impedance matching circuit, and an output end of the first impedance matching circuit is electrically connected to the antenna. A second power amplifier is electrically connected to the signal input end, and a second impedance matching circuit is electrically connected between the second power amplifier and the first impedance matching circuit. A switching circuit is electrically connected to an input end of the second impedance matching circuit. The switching circuit switches on-off corresponding to an operation of the first power amplifier and an operation of the second power amplifier.