Reconfigurable RF Switch Mapping for Post-Fabrication Control
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Solution Overview
Problem
Existing RF switch circuits lack reconfigurability after fabrication, requiring new ICs for different direct mapping configurations, which is costly and limits flexibility in applications.
Innovation Solution
A dual-mode circuit architecture that allows switching between direct mapping and fully decoded mapping configurations, enabling programmable control word registers to map control words to path selection elements, using bitwise comparators and addressable map registers for flexible post-fabrication configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If direct mapping configuration is used in conventional RF switch circuits, then control simplicity is improved, but reconfigurability after fabrication deteriorates
Solution Approach 1:
The patent applies the Dynamics principle by making the mapping configuration dynamic and reconfigurable after fabrication. The system uses programmable map registers that can be loaded with different mapping configurations post-fabrication, allowing the RF switch circuit to adapt its control mapping dynamically. This resolves the contradiction by enabling both simple direct mapping control and reconfigurability through programmable memory elements.
Solution Approach 2:
The patent applies the Parameter changes principle by changing the mapping parameters through programmable map registers. The mapping configuration is stored as programmable data that can be modified after fabrication, allowing the system to switch between different mapping modes (e.g., direct mapping, decoded mapping) by changing the register contents. This enables reconfigurability while maintaining the simplicity of direct mapping when needed.
2Adaptability or versatility
If new ICs are fabricated for different direct mapping configurations, then configuration adaptability is improved, but manufacturing cost increases
Solution Approach 1:
The patent applies the Universality principle by designing a single RF switch circuit that can perform multiple mapping configurations. The programmable map registers enable one IC to be configured for different mapping schemes (direct mapping, decoded mapping, or custom mappings) after fabrication. This eliminates the need to manufacture separate ICs for each configuration, reducing manufacturing costs while maintaining high configuration adaptability.
Solution Approach 2:
The patent applies the Preliminary action principle by pre-provisioning the circuit with programmable map registers during fabrication. These registers are prepared in advance to accept different mapping configurations post-fabrication, enabling flexible adaptation without requiring new IC production. The preliminary inclusion of programmable memory elements allows cost-effective reconfiguration.
3Device complexity
If conventional control circuitry is used, then circuit simplicity is improved, but flexibility in path selection deteriorates
Solution Approach 1:
The patent applies the Intermediary principle by introducing programmable map registers as intermediary elements between the control word input and the path selection logic. These map registers act as a flexible mediation layer that can be programmed to implement different mapping schemes without changing the core control circuitry. This maintains circuit simplicity while providing enhanced flexibility in path selection through programmable mapping configurations.
Data Source
AI summary
A circuit architecture and process that provides for a dual-mode methodology for an RF integrated circuit (IC) switch circuit that allows switching between a direct mapping configuration and a fully decoded mapping configuration, and further provides for changing either mapping configuration after fabrication. A control word is selectively compared to a programmed map register value so that, in a first mode, only one bit position of a control word matches a decoded programmed map bit pattern, and in a second mode, all bits of a control word match a corresponding programmed map bit pattern. Because the map registers can be programmed at least once after IC fabrication, the exact mapping required for a particular application can be determined post fabrication. Further, the first mode of operation is often beneficial during testing because multiple RF signal paths can be turned on at the same time and thus tested in parallel.