Multi-Output Low-Noise Amplifier With Noise-Canceling Current Combining
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Solution Overview
Problem
Traditional low-noise amplifier circuits are designed for single-output RF front ends and struggle to effectively handle multiple-output scenarios, leading to issues with signal reception, noise performance, impedance matching, and linearity when receiving signals on multiple channels simultaneously.
Innovation Solution
A low noise amplifier circuit with a single input terminal and multiple output terminals, comprising a first processing module that amplifies the input voltage signal into current signals, a second processing module for impedance matching and amplification, and a voltage output module that combines these currents to produce multiple output voltage signals, utilizing transconductors and MOSFETs to ensure linearity and noise cancellation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional single-output low-noise amplifier circuits are used for multiple-output scenarios, then the existing circuit structure can be maintained, but signal reception quality, noise performance, and impedance matching deteriorate
Solution Approach 1:
The amplifier circuit is segmented into multiple independent processing modules, each handling a specific output channel. The first processing module processes the input signal for the first output terminal, while the second processing module processes for the second output terminal. This segmentation allows each module to be optimized for its specific output requirements, maintaining signal quality and impedance matching for each channel independently.
Solution Approach 2:
The amplifier circuit is designed with multi-functional capability to handle multiple output terminals simultaneously. Each processing module can independently amplify and process signals for different frequency channels, enabling the circuit to function as multiple single-output amplifiers in parallel while sharing common input and control resources.
2Adaptability or versatility
If traditional single-output low-noise amplifier circuits are used for multiple-output scenarios, then the existing circuit structure can be maintained, but noise performance and linearity worsen
Solution Approach 1:
The circuit is divided into separate processing modules for different output channels, with each module having its own noise optimization. This segmentation prevents noise from one channel from affecting another, and allows each module to be designed with optimal noise characteristics for its specific function.
Solution Approach 2:
The patent converts potentially harmful noise interactions into beneficial noise cancellation effects. By carefully designing the signal paths and phase relationships in the multiple processing modules, noise signals that would normally interfere with each other are transformed to cancel out, improving overall noise performance.
3Adaptability or versatility
If traditional single-output low-noise amplifier circuits are used for multiple-output scenarios, then the existing circuit structure can be maintained, but impedance matching deteriorates
Solution Approach 1:
The amplifier circuit is segmented into multiple processing modules, each with dedicated impedance matching circuits for its specific output terminal. This allows precise impedance matching to be achieved for each output channel independently, rather than attempting to match multiple outputs with a single circuit configuration.
4Reliability
If multiple separate amplifier circuits are used for multiple outputs, then each output can be optimized independently, but chip cost and die area increase
Solution Approach 1:
Multiple processing modules are merged into a single integrated circuit structure that shares common resources such as the input stage, power supply, and control logic. By merging these functions while maintaining separate signal processing paths for each output, the die area is significantly reduced compared to using completely separate amplifier circuits.
Solution Approach 2:
The circuit design uses universal building blocks and shared components that can serve multiple output channels. For example, a single input amplifier stage feeds multiple processing modules, and common biasing circuits are used across all modules, reducing the overall component count and die area while maintaining optimized performance for each output.
Data Source
AI summary
The present disclosure provides a multiple output low noise amplifier circuit, chip and electronic device. The multiple output low noise amplifier circuit includes: a first processing module for amplifying an input voltage signal and converting it into at least two first current signals; a second processing module for impedance matching at the input terminal of the low noise amplifier circuit, and for amplifying the input voltage signal and converting it into at least two second current signals; a voltage output module, connected to the first processing module and the second processing module, for combining the first current signals and the second current signals and converting them into output voltage signals. The low noise amplifier circuit can convert a single input voltage signal to at least two output voltage signals, and is applicable in RF front ends with multiple output terminals.