Integrated Doherty Amplifier Circuit Merging Splitter and Power Stages
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Solution Overview
Problem
Doherty amplifier circuits face challenges in achieving efficient and compact designs due to the lack of integration of splitter, main-power-amplifier, and peaking-power-amplifier components, leading to inefficiencies and larger sizes, especially when handling signals with high peak-to-average power ratios.
Innovation Solution
The integration of a Doherty amplifier circuit on an integrated circuit (IC) with a splitter, main-power-amplifier, and peaking-power-amplifier, including a variable attenuator and phase-shifter, and a transformer, which allows for adjustable signal processing and temperature control, enabling a compact and efficient solution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the splitter, main-power-amplifier, and peaking-power-amplifier are provided as separate components, then the circuit can be easily assembled and maintained, but the overall size and complexity of the system increases
Solution Approach 1:
The patent integrates the splitter, main-power-amplifier, and peaking-power-amplifier into a single integrated circuit device. This merging of previously separate components into one unified chip directly reduces the overall volume and footprint of the amplifier system while maintaining all necessary functional capabilities.
2Manufacturing precision
If traditional separate component design is used, then manufacturing is simpler for individual components, but the overall manufacturing precision and calibration accuracy deteriorates
Solution Approach 1:
By combining all amplifier components on a single integrated circuit, the patent enables centralized manufacturing processes that ensure precise alignment and calibration of all components simultaneously. This eliminates the cumulative tolerance errors that would occur when assembling separate components, thereby improving overall manufacturing precision and calibration accuracy.
3Reliability
If separate components are used, then individual component replacement is easier, but the overall system efficiency and performance deteriorates
Solution Approach 1:
The integration of all amplifier components into a single chip improves system efficiency by minimizing inter-component signal losses and ensuring optimal impedance matching between stages. While this reduces the ability to replace individual components, the overall system reliability is enhanced through improved performance and reduced failure points from interconnections.
Data Source
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AI summary
A Doherty amplifier circuit (100) comprising: a splitter (106) having: a splitter-input-terminal for receiving an input signal; a main-splitter-output-terminal; and a peaking-splitter-output-terminal; a main-power-amplifier (112) having a main-power-input-terminal and a main-power-output-terminal, wherein; the main-power-input-terminal is connected to the main-splitter-output-terminal; and the main-power-output-terminal is configured to provide a main-power-amplifier-output-signal; a peaking-power-amplifier (114) having a peaking-power-input-terminal and a peaking-power-output-terminal, wherein: the peaking-power-input-terminal is connected to the peaking-splitter-output-terminal; and the peaking-power-output-terminal is configured to provide a peaking-power-amplifier-output-signal. The splitter (106), the main-power-amplifier (112) and the peaking-power-amplifier (114) are provided by means of an integrated circuit.