Amplifier Circuit Phase Compensation Across Gain Modes
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Solution Overview
Problem
Amplifier circuits in network and mobile devices experience phase variations in output signals across different gain modes, leading to increased signal processing time due to the need for phase recalibration upon gain mode changes.
Innovation Solution
The amplifier circuit incorporates a first phase adjustment unit with adjustable impedances, allowing for phase compensation across various gain modes, maintaining the phase of output signals within a predetermined range by selectively configuring capacitance, inductance, and resistance in the feedback path and input/output terminals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If various circuit configurations are used to process signals in amplifiers, then signal quality is enhanced, but phase variation in output signals increases
Solution Approach 1:
The patent implements dynamic phase adjustment by configuring different circuit topologies (first, second, third, and fourth configurations) that can be selectively activated based on operating conditions. The amplifier dynamically switches between these configurations to maintain stable output phase while adapting to different signal processing requirements, thereby resolving the contradiction between signal quality enhancement and phase stability.
Solution Approach 2:
The patent changes circuit parameters by selectively enabling different circuit configurations with specific impedance characteristics. Each configuration (first through fourth) has tailored resistance, inductance, and capacitance values that optimize both signal quality and phase stability for particular operating scenarios, allowing the system to adapt parameters dynamically rather than maintaining fixed values.
2Measurement precision
If phase recalibration is performed upon gain mode changes, then phase accuracy is maintained, but signal processing time increases
Solution Approach 1:
The patent implements preliminary action by pre-configuring multiple circuit topologies (first through fourth configurations) with different impedance characteristics before operation. When a gain mode change occurs, the system can immediately switch to the pre-configured appropriate topology without performing time-consuming recalibration, thereby maintaining phase accuracy while minimizing signal processing time loss.
Solution Approach 2:
The system dynamically selects among pre-configured circuit topologies based on the current gain mode and operating conditions. This dynamic switching capability allows the amplifier to adapt to different modes instantly without requiring sequential recalibration procedures, thus maintaining phase precision while reducing the time penalty associated with mode transitions.
Data Source
AI summary
An amplifier circuit includes an input terminal used to receive an input signal, an output terminal used to output an output signal, an amplification unit, and a phase adjustment unit. The amplification unit includes an input terminal coupled to the input terminal of the amplifier circuit, an output terminal coupled to the output terminal of the amplifier circuit, a first terminal coupled to a first voltage terminal, and a second terminal coupled to a second voltage terminal. The phase adjustment unit is coupled to the amplification unit. When the amplifier circuit is operated in a first mode, the output signal has a first phase, and when the amplifier circuit is operated in a second mode, the output signal has a second phase. A difference between the first phase and the second phase is within a predetermined range.