mmWave Low-Noise Amplifier Bypass Architecture for Linearity
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Solution Overview
Problem
Conventional amplifiers face challenges in achieving high linearity and low power consumption, particularly when processing mmWave RF signals, leading to degradation in noise figure and increased power consumption, which is undesirable for mobile devices.
Innovation Solution
An amplifier with low-gain modes of operation is designed with multiple stages and configurable bypass paths around each stage, using components like switches and capacitors to maintain linearity and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional amplifiers are used to amplify mmWave RF signals, then signal strength is improved, but noise figure degrades and power consumption increases
Solution Approach 1:
The amplifier is divided into multiple stages (first stage amplifier, second stage amplifier, etc.), each with configurable bypass paths. This segmentation allows selective amplification where only necessary stages are activated based on input signal strength, reducing overall noise figure and power consumption while maintaining required signal strength amplification.
Solution Approach 2:
The amplifier stages are configured dynamically based on input signal strength. When input signals are strong, bypass paths are activated to reduce gain and prevent over-amplification. When input signals are weak, full amplification paths are activated. This dynamic configuration optimizes noise figure and power consumption across varying signal conditions.
2Power
If amplifier gain is increased to handle weak signals, then signal strength is improved, but power consumption increases
Solution Approach 1:
The amplifier is segmented into multiple independently controllable stages with bypass paths. This allows the system to activate only the minimum necessary amplification stages required for the current signal strength, avoiding unnecessary power consumption in higher gain stages when full amplification is not needed.
Solution Approach 2:
The amplifier gain parameter is dynamically changed based on input signal strength measurements. By adjusting which amplifier stages are active and which bypass paths are engaged, the system optimizes the balance between achieving required signal strength and minimizing power consumption across different operating conditions.
3Use of energy by moving object
If amplifier gain is decreased to reduce power consumption, then power consumption is reduced, but linearity degrades
Solution Approach 1:
The amplifier configuration is dynamically adjusted based on input signal characteristics. When operating in lower gain modes with bypass paths activated, the system maintains linearity by carefully designing the bypass circuitry to preserve signal integrity. This dynamic adaptation allows reduced power consumption while maintaining acceptable linearity for the specific operating conditions.
4Stability of the object's composition
If multiple amplifier stages are used to improve linearity, then linearity is improved, but device complexity increases
Solution Approach 1:
The multi-stage amplifier structure is segmented with independent bypass paths for each stage. This segmentation allows the system to achieve linearity improvement through selective stage activation while managing complexity by providing configurable shortcuts. The bypass paths enable the system to use fewer active stages when full linearity is not required, effectively managing the complexity-performance tradeoff.
Data Source
AI summary
This disclosure provides systems, methods, and devices for wireless communication that support low noise amplification of mmWave radio frequency (RF) signals. In a first aspect, a low noise amplifier includes a first stage amplifier; a second stage amplifier; a configurable first stage bypass coupled between a first input and a first output of the first stage amplifier, and a configurable second stage bypass coupled between a second input and a second output of the second stage amplifier. Other aspects and features are also claimed and described.