Amplifier Circuit Phase Adjustment for Consistent Gain Mode Switching
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Solution Overview
Problem
Amplifier circuits in network and mobile devices experience phase variations in output signals due to different circuit configurations, leading to increased signal processing time during gain mode changes.
Innovation Solution
The amplifier circuit incorporates a first phase adjustment unit with adjustable terminals to maintain phase consistency across various gain modes by adjusting impedance and capacitance, ensuring phase differences remain within a predetermined range.
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:
A phase adjustment unit is introduced as an intermediary component between the signal processing path and the output. This unit includes phase adjustment circuits that can be selectively activated to compensate for phase variations introduced by different amplification circuit configurations, thereby maintaining phase consistency while preserving signal quality enhancement
Solution Approach 2:
The invention changes the electrical parameters (impedance values) of the phase adjustment circuits to compensate for phase variations. By adjusting the impedance parameters of the phase adjustment unit, the output phase can be maintained within a predetermined range despite changes in amplification circuit configuration
2Reliability
If circuit configurations are changed to enhance signal quality, then amplification performance is improved, but signal processing time increases during gain mode changes
Solution Approach 1:
Multiple phase adjustment circuits are pre-configured with different impedance values corresponding to different gain modes. Before a gain mode change occurs, the appropriate phase adjustment circuit is already in place and can be quickly switched to, eliminating the need for complex real-time phase calculations and adjustments during mode transitions
Solution Approach 2:
The phase adjustment unit is designed to be dynamically switchable between different circuit configurations. The switching mechanism allows rapid transition between different gain modes with corresponding phase adjustments, reducing the time penalty associated with mode changes while maintaining signal quality
Data Source
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Figure 3~4
AI summary
An amplifier circuit (1) includes an input terminal (10) to receive an input signal (RFin), an output terminal (12) to output an output signal (RFout), an amplification unit (14), and a phase adjustment unit (161 to 167). The amplification unit (14) includes an input terminal (IN) coupled to the input terminal (10) of the amplifier circuit (1), an output terminal (OUT) coupled to the output terminal (12) of the amplifier circuit (1), a first terminal (T1) coupled to a first voltage terminal (VDD), and a second terminal (T2) coupled to a second voltage terminal (GND). The phase adjustment unit (161 to 167) is coupled to the amplification unit (14). The amplifier circuit (1) can be operated in a plurality of modes to provide respective gains. The phase of the output signal (RFout) is maintained within a predetermined range regardless of the mode the amplifier circuit (1) is operated in.