Amplifying Circuit Dynamic Mode Switching for Gain and Power Trade-offs
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Solution Overview
Problem
Existing amplifying circuits face challenges in achieving a balance between power consumption, gain, and linearity, with single-stage circuits providing limited gain and high power consumption, while multi-stage circuits compromise on linearity.
Innovation Solution
An amplifying circuit that includes transistors and a switching circuit, allowing it to switch between cascode and cascade modes to adaptively manage power consumption and gain, improving operational efficiency by selectively routing radio frequency signals through different impedance paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a single-stage amplifying circuit is used, then power consumption is reduced, but gain is limited
Solution Approach 1:
The patent implements dynamic switching between cascode and cascade modes using a switching circuit controlled by control signals. This allows the amplifying circuit to adapt its configuration based on operational requirements, enabling it to achieve high gain when needed while maintaining low power consumption during normal operation. The dynamic reconfiguration resolves the contradiction by making the circuit's characteristics changeable rather than fixed.
Solution Approach 2:
The patent changes the circuit configuration parameters by switching between two distinct modes: cascode mode for low power consumption and cascade mode for high gain. The switching circuit alters the connection topology and impedance characteristics of the amplifying circuit, thereby changing its operational parameters to match different performance requirements.
2Power
If a multi-stage amplifying circuit is used, then gain is increased, but linearity is adversely affected
Solution Approach 1:
The patent dynamically switches between cascode and cascade modes to optimize linearity. The cascode mode provides better linearity characteristics, while the cascade mode provides higher gain. By dynamically selecting the appropriate mode based on signal conditions and requirements, the circuit maintains good linearity while achieving high gain when necessary, thus resolving the contradiction between gain and linearity.
3Productivity
If switching between operation modes is implemented, then operational efficiency is improved, but device complexity increases
Solution Approach 1:
The patent divides the amplifying circuit into functionally distinct segments (cascode path and cascade path) that can be independently controlled. The switching circuit is also segmented into multiple switches that can be independently controlled to achieve different switching patterns. This segmentation allows for flexible mode switching while keeping each individual component relatively simple.
Data Source
AI summary
An amplifying circuit includes a first transistor, a second transistor, and a switching circuit. A control terminal of the first transistor is coupled to an input terminal of the amplifying circuit, and a first terminal of the first transistor is coupled to a first reference end. The input terminal of the amplifying circuit receives a first radio frequency (RF) signal. A first terminal of the second transistor is coupled to a second terminal of the first transistor, and a second terminal of the second transistor is coupled to an output terminal of the amplifying circuit. The output terminal of the amplifying circuit outputs an amplified signal. The first transistor amplifies the first RF signal to generate a second RF signal. The switching circuit performs a switching operation to transmit the second RF signal to one of the first terminal and the control terminal of the second transistor.