Distributed Memory Control Circuit Settling Speed
Solution Overview
Problem
Existing memory devices face delays in operation speed due to increased settling time for voltages applied during different phases, affecting the accuracy and speed of writing and reading data in memory cells.
Innovation Solution
A distributed controller with a common feedback loop and local feedback loop is used to stabilize output voltages, allowing for automatic enabling or disabling of current to memory cells, and a self-controlled current sink to improve settling speed by replicating the distributed driver circuit within a common feedback loop.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a bias control circuit applies voltages to memory cells during different phases, then data writing and reading operations can be performed, but the settling time increases causing delays in operation speed
Solution Approach 1:
The control circuit is divided into a common controller and multiple distributed controllers. Each distributed controller independently manages voltage application to specific memory cell groups, allowing parallel operation and reducing overall settling time while maintaining voltage accuracy through localized control.
Solution Approach 2:
Feedback loops are implemented in both the common controller and distributed controllers to continuously monitor and adjust voltage levels. This ensures voltages settle within required timeframes with high accuracy, preventing operation speed delays while maintaining reliability.
2Manufacturing precision
If the settling time is increased to ensure correct operations, then voltage accuracy is improved, but delays in operation speed occur
Solution Approach 1:
The distributed controllers are pre-configured with target voltage values and control parameters before operation begins. This preliminary setup allows voltages to settle faster and more accurately during actual operation, reducing both settling time and operation delays while maintaining precision.
Solution Approach 2:
The control circuit dynamically adjusts voltage levels and settling parameters during different operation phases (writing, reading, verification). This dynamic adaptation optimizes the balance between voltage accuracy and operation speed, preventing unnecessary delays while ensuring correct voltage settlement.
Data Source
AI summary
Disclosed is a device including a distributed controller and a common controller. The distributed controller includes a first circuit to generate an output voltage according to a control signal. The common controller includes a common feedback loop coupled to the distributed controller. The common feedback loop includes an amplifier circuit to generate the control signal, and a second circuit coupled to the amplifier circuit. The second circuit replicates the first circuit and stabilizes the control signal.