Switchable Transformer Amplifier for Multi-Band Gain Efficiency

Solution Overview

Problem

Existing wireless communication systems face inefficiencies in amplifying signals across multiple frequency bands due to the need for wideband transformers that maintain high gain across non-contiguous frequency bands, leading to increased power consumption.

Innovation Solution

A switchable transformer configuration that dynamically switches between two passbands, each covering a specific frequency band, allowing the amplifier to operate efficiently by using narrower bandwidths when only one frequency band is in use.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a wideband transformer is used to amplify signals across multiple non-contiguous frequency bands, then the amplifier can operate across multiple bands, but power consumption increases due to maintaining high gain across the entire wideband range

Engineering Contradiction:

Improvemulti-band operation capabilityVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The transformer bandwidth is segmented into multiple narrowband passbands using switching mechanisms. Instead of maintaining a continuous wideband response, the system divides the frequency range into discrete segments (first passband and second passband) that can be selectively activated. This segmentation allows the amplifier to focus resources on specific frequency bands rather than maintaining gain across the entire wideband range simultaneously.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The transformer incorporates dynamic switching capabilities to change its passband configuration in real-time based on operational requirements. Switches can reconfigure the transformer circuitry to activate either the first passband, the second passband, or both, allowing the system to adapt its bandwidth dynamically. This dynamic reconfiguration enables the amplifier to maintain high gain only for currently active frequency bands, reducing power consumption when operating in single-band modes.

Inventive Principle:

Principle #15Dynamics

2Reliability

If a wideband transformer maintains high gain across multiple frequency bands, then signal amplification is effective, but the system complexity increases

Engineering Contradiction:

Improvesignal amplification effectivenessVSAvoidtransformer configuration complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The transformer is designed with multi-functionality to serve multiple frequency bands using a single device structure. By incorporating switching mechanisms, the same transformer can be configured to provide high gain for the first frequency band, the second frequency band, or both bands sequentially or simultaneously. This universal design eliminates the need for separate narrowband transformers for each frequency band, reducing overall system complexity while maintaining amplification effectiveness.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The transformer incorporates dynamic switching capabilities to change its passband configuration in real-time based on operational requirements. Switches can reconfigure the transformer circuitry to activate either the first passband, the second passband, or both, allowing the system to adapt its bandwidth dynamically. This dynamic reconfiguration enables the amplifier to maintain high gain only for currently active frequency bands, reducing power consumption when operating in single-band modes.

Inventive Principle:

Principle #15Dynamics

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This solution enhances power efficiency by reducing power consumption in the amplifier, as it only maintains high gain for the active frequency band, thereby improving overall system performance.

Implementation Method 1

a first switchable inductor (440) coupled to the first amplifier, a second switchable inductor (460) magnetically coupled to the first switchable inductor

Methodology Applied

Scientific EffectMagnetic coupling: Electromagnetic Induction

Data Source

PatentEP4282071B1Amplifier with switchable transformer

Publication Date: 2025.05.07 QUALCOMM INC

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AI summary

In certain aspects, an apparatus includes a first amplifier having a first output and a second output, and a transformer. The transformer includes a first switchable inductor coupled between the first output and the second output, a first capacitor coupled in parallel with the first switchable inductor, a second switchable inductor magnetically coupled to the first switchable inductor, a second capacitor coupled in parallel with the second switchable inductor, a third switchable inductor magnetically coupled to the first switchable inductor, and a third capacitor coupled in parallel with the third switchable inductor.