Multi-segment Primary Transformer for Power Amplifier Integration
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Solution Overview
Problem
Fully integrating a high-power amplifier on a single chip is challenging due to bulky power matching structures that occupy large chip area, degrading performance of other mobile application functions, necessitating improved power matching designs to isolate and miniaturize the matching structure while maintaining high output power.
Innovation Solution
A power amplifier system utilizing a multi-segment primary transformer winding with a turns ratio greater than the secondary winding to boost voltage, minimizing passive loss and allowing for compact, high-power output while isolating the matching structure from other mobile application functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a power amplifier is fully integrated on a single chip, then integration is achieved, but bulky power matching structures require a large chip area
Solution Approach 1:
The primary winding is divided into multiple segments (first primary winding segment, second primary winding segment, etc.) that are distributed across different chip areas. Each segment is inductively coupled to the secondary winding, allowing the power matching function to be achieved while distributing the structure across the chip rather than concentrating it in one bulky structure.
Solution Approach 2:
The patent uses multi-layer substrate structures with vias to create three-dimensional winding arrangements. The primary and secondary windings are formed on different layers, utilizing the vertical dimension to reduce the planar chip area required for the power matching structure.
2Adaptability or versatility
If the matching structure is distributed on the whole chip area, then integration is achieved, but high output power degrades the performance of other mobile application functions
Solution Approach 1:
By segmenting the primary winding into multiple distributed segments, the high output power effects are localized to specific chip areas rather than affecting the entire chip. Each segment handles a portion of the power, reducing the harmful effects on other mobile application functions located in different chip regions.
Solution Approach 2:
The power matching structure is extracted as a separate functional block with dedicated primary and secondary windings, isolated from other mobile application functions. This allows the high-power matching structure to be designed independently without interfering with the performance of other chip functions.
3Object-affected harmful factors
If the matching structure is isolated into one area, then performance of other functions is maintained, but the total matching structure size should be reasonably small to be cost effective
Solution Approach 1:
The patent employs multi-layer substrate structures where primary and secondary windings are formed on different layers and connected via vias. This three-dimensional arrangement allows the matching structure to be isolated in one area while minimizing its planar footprint, making it compact and cost-effective.
Solution Approach 2:
The windings are arranged in a nested configuration where primary and secondary windings are interleaved or positioned in overlapping patterns. This nesting approach maximizes magnetic coupling while minimizing the overall area occupied by the matching structure.
4Reliability
If a single secondary transformer winding is used with multi-segment primary winding, then magnetic coupling is increased, but passive loss minimization must be achieved
Solution Approach 1:
The primary winding is segmented into multiple sections that are each inductively coupled to the secondary winding. This segmentation allows for optimized magnetic coupling paths while reducing the overall parasitic inductance and resistance, thereby minimizing passive losses.
Solution Approach 2:
The patent uses a turns ratio where the secondary winding has more turns than each individual primary winding segment (N2 > N1). This provides voltage boosting while the multi-segment primary configuration ensures sufficient magnetic coupling without requiring excessive primary winding turns that would increase resistive losses.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables a compact, high-power amplifier system with reduced passive loss, effectively addressing the challenge of integrating power amplifiers on a single chip by enhancing magnetic coupling and maintaining performance of other mobile application functions.
Implementation Method 1
a single secondary transformer winding with a second number of N2 turns. The turns ratio from the primary transformer winding to the secondary transformer winding may be N1:N2 with N2>N1 to boost the voltage of the primary winding to the secondary winding in the ratio of substantially N2/N1
Implementation Method 2
The multi-segment primary winding may increase the magnetic coupling, therefore minimizing passive loss
Data Source
AI summary
Embodiments of the invention may provide for power amplifier systems and methods. The systems and methods may include a power amplifier that generates a first differential output signal and a second differential output signal, a primary winding comprised of a plurality of primary segments, where a first end of each primary segment is connected to a first common input port and a second end of each primary segment is connected to a second common input port, where the first common input port is operative to receive the first differential output signal, and where the second common input port is operative to receive the second differential output signal, and a single secondary winding inductively coupled to the plurality of primary segments.