Integrated PA-LNA Amplifier Circuit for TDD Signal Switching
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Solution Overview
Problem
TDD communication circuits for LTE and Sub6 bands require separate power amps and LNAs, increasing the size of the amplifier end and complicating signal transmission and reception.
Innovation Solution
An electronic device with a PA and LNA integrated as a single amplifier block, controlled by a communication processor to manage signal transmission and reception modes, and power supply based on amplification modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate power amps and LNAs are used for TDD communication circuits, then signal transmission and reception functions are supported, but the size of the amplifier end increases and device complexity increases
Solution Approach 1:
The patent combines the power amplifier and low-noise amplifier into a single integrated amplifier module that can operate in different modes (transmission mode and reception mode) to perform both signal amplification functions. This integration reduces the overall size and complexity while maintaining the required adaptability for both Tx and Rx operations in TDD communication circuits.
2Adaptability or versatility
If separate power amps and LNAs are used for TDD communication circuits, then signal transmission and reception functions are supported, but device complexity increases
Solution Approach 1:
The integrated amplifier module is designed to perform multiple functions by switching between transmission mode (power amplification) and reception mode (low-noise amplification). This multi-functional design eliminates the need for separate dedicated amplifiers for each function, thereby reducing device complexity while maintaining full adaptability for TDD communication requirements.
3Ease of operation
If separate power supply devices are used for PA and LNA, then independent power control is achieved, but device complexity and power management overhead increase
Solution Approach 1:
The patent integrates the power supply control for both the power amplifier and low-noise amplifier into a single power supply device within the amplifier module. This unified power supply structure reduces the number of separate power supply components and interconnections, thereby reducing device complexity while still enabling independent power control through internal switching mechanisms that can selectively power different amplifier stages based on operational mode.
Data Source
AI summary
An electronic device may include a communication processor, a transceiver, an antenna, a power supply module, and a communication circuit. The communication circuit includes an input terminal configured to acquire a signal transmitted from the transceiver, an amplifier module, an output terminal configured to transmit a signal to the transceiver, an antenna terminal connected to the antenna, a first switch connected to the input terminal and the amplifier module, a second switch connected to the amplifier module and the output terminal, and a third switch connected to the first switch, the second switch, and the antenna terminal.