Shared Balun RF Transmitter for Multi-Band Die Reduction
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Solution Overview
Problem
Conventional wireless communication devices require multiple dedicated transformers and variable gain amplifiers for each frequency band, leading to increased size, cost, power consumption, and design complexity due to the need to support multiple transmission/reception channels.
Innovation Solution
A multi-band wireless transmitter design utilizing a single segmented variable gain amplifier and tunable balun, which provides controlled gain and impedance transformation across multiple frequency bands through a shared amplifier and balun configuration, reducing the number of components and simplifying die routing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple dedicated transformers and variable gain amplifiers are used for each frequency band, then the device can support multiple transmission/reception channels, but the device size, cost, power consumption, and design complexity increase
Solution Approach 1:
The patent implements a single shared variable gain amplifier and single shared balun that can be tuned to operate across multiple frequency bands. The balun is designed with adjustable transformation ratios and the amplifier provides variable gain control, allowing both components to serve multiple bands universally rather than requiring dedicated components for each band.
Solution Approach 2:
The patent merges multiple previously separate components (dedicated amplifiers and dedicated baluns for each band) into single shared components. The single amplifier and single balun are combined to handle multiple frequency bands, reducing the total component count while maintaining multi-band functionality through tuning mechanisms.
2Adaptability or versatility
If multiple dedicated transformers and variable gain amplifiers are used for each frequency band, then the device can support multiple transmission/reception channels, but the device size and die area increase
Solution Approach 1:
The single shared amplifier and balun are designed to universally support multiple frequency bands through tuning capabilities. The balun's adjustable transformation ratio and the amplifier's variable gain allow one pair of components to replace what would traditionally require multiple pairs, significantly reducing the die area occupied by these components.
Solution Approach 2:
By merging multiple dedicated components into single shared components, the patent consolidates the physical space required. The single amplifier and single balun occupy less die area than multiple dedicated instances would require, while still providing multi-band support through electronic tuning rather than physical multiplication of components.
3Adaptability or versatility
If multiple dedicated transformers and variable gain amplifiers are used for each frequency band, then the device can support multiple transmission/reception channels, but power consumption increases
Solution Approach 1:
The single shared amplifier and balun are designed to universally handle multiple frequency bands. By having one amplifier instead of multiple dedicated amplifiers, the total power consumption is reduced since fewer components need to be powered and operated simultaneously. The tuning mechanisms allow the same components to adapt to different bands without requiring additional power-hungry dedicated hardware for each band.
Solution Approach 2:
Merging multiple dedicated amplifiers into a single variable gain amplifier consolidates the power requirements. Instead of powering multiple amplifiers that would each consume energy, a single amplifier with variable gain control serves all bands, reducing overall power consumption while maintaining the capability to support multiple transmission and reception channels.
4Adaptability or versatility
If multiple dedicated transformers and variable gain amplifiers are used for each frequency band, then the device can support multiple transmission/reception channels, but design complexity and routing complexity increase
Solution Approach 1:
The universal design of the single amplifier and single balun, capable of operating across multiple bands through tuning, simplifies the manufacturing process. Rather than designing, laying out, and routing multiple dedicated component sets for each band, the design team only needs to create one set of components with adjustable parameters, significantly reducing design cycle time and simplifying manufacturing.
Solution Approach 2:
By merging multiple dedicated components into single shared components, the patent simplifies the overall device architecture. This consolidation reduces the complexity of die routing, as there are fewer components to connect and route signals between. The simplified architecture with fewer interconnections makes the design easier to manufacture and reduces the design cycle time required to complete the multi-band transmitter.
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
This design reduces the overall component count, size, and power consumption while simplifying the design cycle, enabling efficient support of multiple frequency bands with a smaller die area and package, and improving DC power efficiency.
Implementation Method 1
a shared tunable balun connected to receive the amplified transmit signal and to generate a balun output signal at any of the plurality of predetermined frequency bands
Implementation Method 2
a shared segmented variable gain amplifier connected to receive a transmit signal and to generate an amplified transmit signal at any of a plurality of predetermined frequency bands
Data Source
AI summary
A multi-band RF transmitter circuit (30) for a wireless communication device combines a plurality of RF transmission blocks into a single transceiver integrated circuit which includes a shared broadband SVGA (32), a shared tunable balun (34), and an output switching network (38) at the output of the balun to support three different frequency bands. The outputs of the multi-band RF transmitter circuit are connected to separate external power amplifier circuits (42-44), where each power amplifier circuit generates an amplified signal for one of the plurality of predetermined frequency bands.