Multiband RF Amplifier Circuit With Shared Peak Amplifier
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Solution Overview
Problem
In multiband applications, existing amplifier circuits face an increase in the number of amplifiers, leading to degraded amplification characteristics when a single amplifier is used for multiple bands.
Innovation Solution
The proposed amplifier circuit includes a configuration with multiple amplifiers and transformers, where specific amplifiers are dedicated to specific bands, and a common peak amplifier is used across bands, connected through transmission lines to optimize signal processing and reduce the number of amplifiers needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate amplifiers are provided for each band in multiband applications, then amplification characteristics for each band are optimized, but the number of amplifiers increases
Solution Approach 1:
The peak amplifier is designed to serve multiple frequency bands simultaneously through a shared architecture. The amplifier circuit includes a first peak amplifier that amplifies signals in a first frequency band and a second peak amplifier that amplifies signals in a second frequency band, with both sharing common components and output paths. This multi-functional design allows a single amplifier system to handle multiple bands without requiring separate dedicated amplifiers for each band, thus optimizing amplification characteristics while controlling the number of amplifiers.
Solution Approach 2:
The patent combines multiple amplification functions into a unified amplifier system. The first and second peak amplifiers are merged into a single integrated circuit structure, sharing common input terminals, output terminals, and internal amplifier stages. The output of the first peak amplifier is connected to the input of the second peak amplifier, creating a cascaded configuration that processes multiple bands through a unified path, thereby reducing the total number of discrete amplifier components needed.
2Device complexity
If one amplifier circuit is used for multiple bands, then the number of amplifiers is reduced, but amplification characteristics may be degraded
Solution Approach 1:
The amplifier system is segmented into distinct functional blocks: a carrier amplifier for baseband amplification, a first peak amplifier for first band enhancement, and a second peak amplifier for second band enhancement. Each segment is optimized for its specific function and frequency range, allowing the unified system to maintain high amplification characteristics across multiple bands while sharing common infrastructure.
Solution Approach 2:
The amplifier system employs dynamic signal routing and conditional amplification where the first and second peak amplifiers are activated based on the input signal characteristics. The circuit dynamically adjusts which amplification path is active depending on the frequency band and signal conditions, enabling a single amplifier circuit to deliver optimized performance across multiple bands without the need for separate dedicated amplifiers.
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 configuration effectively suppresses the increase in the number of amplifiers and reduces deterioration of amplification characteristics, enabling efficient signal amplification across multiple bands while maintaining high performance.
Implementation Method 1
a first transformer including a first input-side coil and a first output-side coil; a second transformer including a second input-side coil and a second output-side coil
Data Source
AI summary
An amplifier circuit includes amplifiers, transformers, and a transmission line. A first end of an input-side coil is connected to an output terminal of the amplifier, a second end of the input-side coil is connected to an output terminal of the amplifier via the transmission line, a first end of an input-side coil is connected to an output terminal of the amplifier, a second end of the input-side coil is connected to the output terminal of the amplifier via the transmission line, a first end of an output-side coil is connected to an output terminal, a second end of the output-side coil is connected to a ground, a first end of an output-side coil is connected to an output terminal, and a second end of the output-side coil is connected to the ground.