Dual SD Card Design with Switchable Memory Circuits
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Solution Overview
Problem
Current SD cards often require separate cards for high capacity and high speed, as well as for different sizes like full-size, micro-, and nano-formats, which can be inconvenient for users needing both performance metrics and size versatility.
Innovation Solution
A dual SD card design that houses two separate SD memory circuits within a single enclosure, each with its own set of external contacts, allowing for either the same or different capacities and speeds, and optionally including a micro- or nano-SD card, a battery, and a printed circuit board, with a switch to select between them.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single SD card is used, then the device complexity is reduced, but the adaptability is limited because users need both high capacity and high speed, as well as different card sizes
Solution Approach 1:
The patent combines two separate SD card memory circuits (first and second SD memory circuits with different capacities and speeds) into a single physical card enclosure, allowing the card to function as both a full-size SD card and a micro/nano-SD card simultaneously, thereby resolving the contradiction between adaptability and device complexity
Solution Approach 2:
The card is designed with universal functionality to support multiple SD card formats (full-size and micro/nano-SD) within a single card body, enabling the same card to serve different storage needs (high capacity and high speed) without requiring separate cards for each function
2Adaptability or versatility
If two separate SD cards are used for high capacity and high speed, then the adaptability is improved, but the ease of operation deteriorates due to carrying and managing multiple cards
Solution Approach 1:
The patent merges two separate SD card functions into one physical card, allowing users to access both high-capacity and high-speed storage by simply inserting or removing a single card, thereby eliminating the operational burden of managing multiple separate cards while maintaining full adaptability
Data Source
AI summary
A multi-memory SD card includes an enclosure having the outer dimensions of a standard SD card. Two separate SiP SD packages are provided along with two separate sets of electrical contacts each according to the SD standard to provide, in a single SD card bundle, the functions and performance of two SD cards. The SiP packages may both be full size SD format, or one may be a micro- or nano- SD card. The first and second SiP SD packages has the same or different capacity and/or speed, and the micro- or nano- SiP package is permanent or removable. An onboard battery and/or PCB may also be housed in the enclosure for configuring WiFi/redundant array of independent disks (RAID) or backup.