Tunable DAC Matching Network for Wideband RF Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional digital-to-analog converters (DACs) have limited transmission frequency ranges, which restrict their ability to cover broad frequency bands required in modern electronic devices, necessitating multiple DACs and increasing complexity and cost.
Innovation Solution
The implementation of a transformer with an impedance tuning circuit in the DAC, featuring auxiliary inductors and capacitors, allows for adjustable output impedance, enabling the DAC to transmit RF signals across a wide frequency range by shifting the center frequency and adjusting the output reactance, thereby covering multiple transmission frequency ranges with a reduced number of components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional DACs are used without impedance tuning circuits, then the device complexity is low, but the transmission frequency range is limited
Solution Approach 1:
The patent applies dynamics by making the impedance tuning circuit adjustable through selectable auxiliary inductors and capacitors. The circuit can dynamically change its impedance characteristics to match different frequency ranges, allowing a single DAC to adapt to multiple transmission frequency bands (e.g., 450-950 MHz, 1.7-2.2 GHz, 2.3-2.7 GHz) rather than being fixed for one range.
Solution Approach 2:
The patent implements universality by designing a single DAC with an integrated impedance tuning circuit that can serve multiple frequency ranges. The selectable auxiliary components (inductors and capacitors) enable the same DAC structure to function across different frequency bands, replacing the need for multiple dedicated DACs for different frequency ranges.
2Adaptability or versatility
If multiple DACs are used to cover broad frequency bands, then the transmission frequency range is improved, but the device complexity and cost increase
Solution Approach 1:
The patent applies merging by combining multiple frequency coverage capabilities into a single DAC through the impedance tuning circuit. Instead of using separate DACs for different frequency ranges, the tuning circuit merges the ability to handle multiple frequency bands into one unified component, reducing the total number of DACs required in the system.
Solution Approach 2:
The patent implements universality by designing a single DAC with an integrated impedance tuning circuit that can serve multiple frequency ranges. The selectable auxiliary components (inductors and capacitors) enable the same DAC structure to function across different frequency bands, replacing the need for multiple dedicated DACs for different frequency ranges.
3Adaptability or versatility
If multiple DACs are used to cover broad frequency bands, then the transmission frequency range is improved, but the production cost increases
Solution Approach 1:
The patent applies merging by combining multiple frequency coverage capabilities into a single DAC through the impedance tuning circuit. Instead of using separate DACs for different frequency ranges, the tuning circuit merges the ability to handle multiple frequency bands into one unified component, reducing the total number of DACs required in the system and associated production costs.
Solution Approach 2:
The patent implements universality by designing a single DAC with an integrated impedance tuning circuit that can serve multiple frequency ranges. The selectable auxiliary components (inductors and capacitors) enable the same DAC structure to function across different frequency bands, replacing the need for multiple dedicated DACs for different frequency ranges.
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 solution enables efficient transmission of RF signals across a wide frequency range, reducing the number of DACs needed, lowering production costs, and minimizing component footprint while maintaining improved power efficiency and output power.
Implementation Method 1
The transformer may include a primary portion and a secondary portion. The primary portion may receive one or more analog signals indicative of the one or more RF signals.
Implementation Method 2
The secondary portion may include a third inductor that may inductively couple to the first inductor, and a fourth inductor that may inductively couple to the second inductor
Implementation Method 3
The impedance tuning circuit may include a first auxiliary inductor selectable to decrease a transmission frequency range of the transmitter based on an inductance value of the first auxiliary inductor
Implementation Method 4
The first auxiliary capacitor may be selectable to increase the transmission frequency range of the transmitter based on a capacitance value of the first auxiliary capacitor
Data Source
AI summary
Systems and methods for generating a radio frequency (RF) signal by a digital-to-analog converter (DAC) with transmission frequency within a wide transmission frequency range are described. An output reactance of the DAC coupled (directly or indirectly) to one or more antennas corresponds to the transmission frequency of the RF signals. Multiple embodiments of the DAC are described to include circuitry for tuning the output reactance of the DAC, and therefore, shifting a center frequency to select a transmission frequency range (from multiple transmission frequency ranges) for providing the RF signals.