On-Chip Regulated Power Source for Memory Circuitry Peak Current Protection
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Solution Overview
Problem
As process sizes shrink for nonvolatile memory, such as flash memory, the power consumption of memory circuitry becomes critical due to high peak currents drawn by components like charge pumps and output drivers, which can damage the power source.
Innovation Solution
An integrated circuit design that includes a power supply input pin receiving variable current, an on-chip power source providing regulated current, and various circuits like charge pumps and output drivers powered by this regulated current, limiting peak power consumption and preventing damage to the power source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If charge pumps and output drivers draw peak currents to perform their functions, then the power consumption increases, but the power source may be damaged
Solution Approach 1:
The patent divides the power supply system into two segments: an off-chip power source that provides variable current and an on-chip regulated power source that provides controlled current. This segmentation allows peak power demands to be met while preventing damage through regulation, resolving the contradiction between power delivery and power source protection.
Solution Approach 2:
The on-chip regulated power source acts as an intermediary between the off-chip power source and the high-power circuits (charge pumps and output drivers). It regulates the current to prevent peak power damage while still enabling the circuits to function, thus protecting the power source while maintaining operational capability.
2Productivity
If process sizes shrink to increase integration density, then more functionality is achieved, but power consumption becomes more critical
Solution Approach 1:
The patent applies local quality by providing regulated power specifically to high-power consuming circuits (charge pumps and output drivers) while allowing other circuits to operate with standard power supply. This targeted approach addresses power consumption criticality in specific areas without compromising overall integration density.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively regulates current to prevent peak power consumption, ensuring the integrated circuit's power source is not damaged and maintaining stable operation by switching between variable and regulated current sources based on memory settings.
Implementation Method 1
a first boost capacitor coupled to the output node, and a second boost capacitor coupled to a gate of the pass transistor
Data Source
AI summary
An integrated circuit comprises a power supply input pin receiving an off-chip supply voltage having a variable current, an on-chip power source powered by the off-chip supply voltage and providing a regulated current, a memory array, and a set of one or more circuits coupled to the memory array and powered by the regulated current from the on-chip power source. The IC can include control circuitry performing memory operations on the memory array, said control circuitry powered by at least the off-chip supply voltage from the power supply pin.