Push-Pull Amplifier Circuit With Mode Switching for Lower RF Power
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing RFIC receiving circuits face challenges in reducing power consumption, which affects the battery life of electronic devices and the overall performance in wireless communication technologies like Wi-Fi and Bluetooth.
Innovation Solution
A unit amplification circuit is designed with a push-pull circuit, a symmetrical circuit, and a path control circuit. This configuration allows the circuit to operate in two modes: an amplification mode and a deactivation mode, where the symmetrical circuit is turned off in the amplification mode and turned on in the deactivation mode, and the path control circuit connects or disconnects the drain and output terminal accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the unit amplification circuit operates in amplification mode with continuous power supply, then the amplification performance is maintained, but the power consumption increases
Solution Approach 1:
The circuit dynamically switches between amplification mode and deactivation mode based on operational requirements. The path control circuit enables the transistor to alternately connect and disconnect the input and output terminals, allowing the circuit to adapt its state (active or inactive) to match the signal processing needs, thereby reducing power consumption during deactivation while maintaining performance when needed
Solution Approach 2:
The circuit employs periodic switching between amplification and deactivation modes through the path control circuit. By rhythmically enabling and disabling the amplification path based on signal presence or processing requirements, the circuit achieves periodic action that balances performance maintenance with power consumption reduction
2Use of energy by moving object
If the unit amplification circuit is deactivated to reduce power consumption, then the power usage decreases, but the impedance matching and linearity deteriorate
Solution Approach 1:
The symmetrical circuit is configured to be turned on in deactivation mode to preliminarily establish proper impedance matching conditions at the input and output terminals. This preliminary action ensures that even when the main amplification path is deactivated, the impedance characteristics remain matched, preventing signal reflections and maintaining linearity for when the circuit is reactivated
Solution Approach 2:
The patent employs asymmetrical operation where the symmetrical circuit operates in opposite phase to the main amplification circuit. When the push-pull amplification circuit is active, the symmetrical circuit is deactivated, and vice versa. This asymmetrical timing arrangement allows the symmetrical circuit to compensate for impedance mismatches and maintain linearity during transitions and deactivation periods
3Reliability
If the symmetrical circuit is turned on continuously, then the impedance matching is improved, but the power consumption increases
Solution Approach 1:
The symmetrical circuit dynamically switches its operational state based on the mode of the main amplification circuit. It is deactivated during amplification mode and activated during deactivation mode, creating a dynamic relationship where the total power consumption is optimized while impedance matching is maintained through coordinated switching of both circuits
Data Source
Figure 1
Figure 2A
Figure 2B
AI summary
A unit amplification circuit includes a push-pull circuit having a transistor with a gate connected to an input terminal, a symmetrical circuit connected symmetrically to the push-pull circuit and configured to be turned off in a first operation mode and turned on in a second operation mode, and a path control circuit connected to a drain of the transistor and configured to connect the drain and an output terminal in the first operation mode and to disconnect the drain and the output terminal in the second operation mode.