Multi-Modal Power Amplifier With Dynamic Load Impedance Switching

Solution Overview

Problem

Existing power amplification systems for wireless communication are inefficient and costly due to the need for multiple devices to accommodate different standards like IEEE 802.11b and 802.11g, which require different power amplification characteristics, leading to suboptimal usage of devices and increased costs.

Innovation Solution

A multi-modal power amplification system with an adjustable power amplifier and variable impedance unit that adjusts amplification and load impedance based on input signal characteristics, using cascode amplifiers and a switchable impedance device to optimize power amplification for various standards, such as 802.11b and 802.11g, by varying the effective load impedance perceived by the power amplifier.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple power amplifier devices are used to accommodate different standards (802.11b and 802.11g), then each standard's specific power amplification requirements are met, but device complexity and cost increase

Engineering Contradiction:

Improvecompatibility with different standardsVSAvoidnumber of devices

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements a single power amplifier device that can operate in multiple modes (802.11b and 802.11g standards) by dynamically adjusting its characteristics. The amplifier includes switchable components that allow it to adapt its gain, bandwidth, and impedance matching according to the active standard, eliminating the need for separate dedicated amplifiers for each standard.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent employs dynamic adjustment mechanisms including switchable capacitors, inductors, and gain stages that can be reconfigured in real-time based on the operating standard. This dynamic reconfiguration allows the amplifier to optimize its performance characteristics for each standard while using a single physical device.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If multiple power amplifier devices are used to accommodate different standards, then each standard's requirements are met, but cost increases

Engineering Contradiction:

Improvecompatibility with different standardsVSAvoidnumber of devices

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The patent implements a single power amplifier device that can operate in multiple modes (802.11b and 802.11g standards) by dynamically adjusting its characteristics. The amplifier includes switchable components that allow it to adapt its gain, bandwidth, and impedance matching according to the active standard, eliminating the need for separate dedicated amplifiers for each standard.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent combines multiple standard-specific amplifier circuits into a single integrated device with shared components. By merging the 802.11b and 802.11g amplifier paths into one device with switchable configuration, the patent reduces component count and overall system cost while maintaining compatibility with both standards.

Inventive Principle:

Principle #5Merging (Combining)

3Quantity of substance

If a single power amplifier is used for different standards, then device quantity is reduced, but performance optimization for each standard deteriorates

Engineering Contradiction:

Improvenumber of devicesVSAvoidperformance optimization

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The patent employs dynamic adjustment mechanisms including switchable capacitors, inductors, and gain stages that can be reconfigured in real-time based on the operating standard. This dynamic reconfiguration allows the amplifier to optimize its performance characteristics for each standard while using a single physical device.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent changes key operating parameters such as gain, bandwidth, and impedance matching values based on the active standard. By switching between different parameter sets optimized for 802.11b versus 802.11g, the amplifier maintains high performance for each standard despite using a single device architecture.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS8957733B2Systems and methods for performing multi-modal power amplification

Publication Date: 2015.02.17 MARVELL ASIA PTE LTD

AI summary

In accordance with an embodiment of the disclosure, systems and methods are provided for multi-modal power amplification. In certain implementations, an adjustable power amplifier amplifies an input signal, and the amount of amplification is varied based on the input signal. A variable impedance unit receives an amplified input signal, and the amount of load impedance at the variable impedance unit is varied based on the input signal.