Analog Solid State Memory Bit Pattern Programming
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Solution Overview
Problem
Traditional solid-state memory devices face inefficiencies in storing and retrieving multiple bits per cell due to their binary operation nature, leading to longer operation times as more bits are stored, and they lack the capacity and cost-effectiveness of traditional hard disk drives.
Innovation Solution
The memory devices utilize analog signals to represent complete bit patterns across a continuum of threshold voltages, allowing for single read and write operations to store and retrieve multiple bits, similar to CMOS imager technology, with sample and hold circuitry to manage and convert these signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional binary operations are used to store multiple bits per cell, then storage capacity increases, but operation time increases significantly
Solution Approach 1:
The patent changes the fundamental parameter of data representation from binary (discrete) to analog (continuous). By representing bit patterns as analog signals with continuous voltage levels, the system enables single-operation retrieval of multiple bits without the sequential operations required by traditional binary methods, thus reducing operation time while maintaining high storage capacity.
Solution Approach 2:
The patent substitutes the mechanical/sequential binary operation system with an analog signal-based system. Instead of using sequential read/write operations for each bit, the system uses analog communication to transfer complete bit patterns in a single operation, fundamentally changing how data is stored and retrieved in solid state memory.
2Quantity of substance
If traditional binary operations are used to store multiple bits per cell, then storage capacity increases, but cost per bit increases
Solution Approach 1:
By changing from binary to analog representation, the patent enables more bits to be stored per cell without proportionally increasing manufacturing complexity. The analog signal approach allows efficient use of existing solid state memory structures, achieving higher capacity without the exponential cost increases associated with traditional multi-level cell binary operations.
3Quantity of substance
If more bits are stored per cell using traditional methods, then storage capacity increases, but the number of operations required increases
Solution Approach 1:
The patent merges multiple bit operations into a single analog operation. Instead of performing separate read/write operations for each bit when storing multiple bits per cell, the system uses analog signal representation to combine all bit operations into one unified operation, significantly improving productivity.
Solution Approach 2:
The patent replaces the sequential mechanical bit-by-bit operation system with an analog signal system that retrieves complete bit patterns simultaneously. This substitution reduces the number of operations from multiple sequential steps to a single analog read/write operation.
Data Source
AI summary
Memory devices adapted to receive and transmit analog data signals representative of bit patterns of two or more bits facilitate increases in data transfer rates relative to devices communicating data signals indicative of individual bits. Programming of such memory devices includes preprogramming erased memory cells that are to be programmed to a known Vt that is less than the smallest Vt of the possible programmable states. Thus, the subsequent programming pulses start programming all cells from the known threshold voltage.