Compressor Decompressor Control Signal Routing
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Solution Overview
Problem
The increasing complexity of NAND flash memory cells and the exponential growth in control signals pose challenges for existing connection methods, necessitating solutions to facilitate control signal routing and reduce signal size.
Innovation Solution
The implementation of compressors and decompressors that utilize residual compression, coding mode determination, analog signal compression based on indexing, and run-length encoding (RLE) to manage control signals, along with a memory system comprising a compressor and decompressor to handle control signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If control signals are transmitted without compression, then the control signal routing is straightforward, but the size of control signals becomes large and routing burden increases
Solution Approach 1:
The patent extracts and separates the control signal into multiple components including MSB (most significant bit), LSB (least significant bit), and residual signals. By taking out the significant bits and transmitting them separately while compressing the residual portion, the overall control signal size is reduced while maintaining routing simplicity for the extracted components.
Solution Approach 2:
The control signal is segmented into multiple parts: MSB, LSB, and residual signals. Each segment is processed differently - MSB and LSB are transmitted separately while the residual is compressed. This segmentation allows the routing system to handle different signal components through optimized paths, reducing the total routing burden.
2Adaptability or versatility
If the number of control signals is increased to handle complex NAND flash memory cells, then more memory cells can be controlled, but the complexity of connection methods increases
Solution Approach 1:
The patent merges multiple control signals into a compressed representation by combining MSB, LSB, and residual components. This merging reduces the number of separate connection paths needed while maintaining the ability to control multiple memory cells, thereby reducing connection method complexity without sacrificing control capability.
Solution Approach 2:
The patent changes the parameter representation of control signals from full-resolution to a compressed format using MSB/LSB separation and residual compression. This parameter transformation allows more memory cells to be controlled with fewer signal lines, reducing connection complexity while maintaining adaptability.
Data Source
AI summary
A compressor for compressing a control signal includes residual compression circuitry configured to sequentially receive a first control signal and a second control signal and perform compression based on a difference between the first control signal and the second control signal, coding mode determination circuitry configured to determine a coding mode based on a type of control signal, analog signal compression circuitry configured to perform compression based on indexing, and control signal compression circuitry configured to perform compression based on run-length encoding (RLE).