Multi-Point Power Supply Circuit for IR Drop and EMI Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In NAND-type non-volatile memory systems, the increased data transmission rate leads to large load currents, causing reliability issues in power supply wiring, increased IR drop, and electromagnetic interference (EMI), particularly due to variations in power supply voltage outputs from multiple power supply circuits.
Innovation Solution
A power source circuit configuration that includes multiple power supply circuits connected to different positions in the power supply wiring, with a reference voltage supply circuit generating various reference voltages and a MUX switch to provide an individual optimum reference voltage to each power supply circuit, ensuring balanced current supply and stable output.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple power supply circuits are used to supply power to different positions in the power supply wiring, then the power supply capacity and current delivery capability are improved, but the power supply voltage outputs vary due to device characteristic variations, causing instability and EMI
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the reference voltage supplied to each power supply circuit based on its output voltage feedback. The control circuit monitors the output voltage of each power supply circuit and modifies the reference voltage parameter to compensate for device characteristic variations, ensuring stable power supply voltage outputs across all circuits despite initial variations.
2Productivity
If the data transmission rate is increased to meet capacity demands, then the productivity and data throughput are improved, but the load current becomes large, causing reliability deterioration, increased IR drop, and EMI
Solution Approach 1:
The patent applies segmentation by dividing the power supply system into multiple independent power supply circuits, each serving specific positions in the power supply wiring. This segmentation distributes the large load current across multiple circuits rather than concentrating it in a single circuit, reducing the current burden on each individual circuit and thereby improving reliability, reducing IR drop, and minimizing EMI while supporting high data transmission rates.
3Device complexity
If a single reference voltage is supplied to all power supply circuits, then the device complexity is reduced, but the power supply voltage outputs vary due to device characteristic variations, causing unstable power supply
Solution Approach 1:
The patent applies feedback by implementing a control circuit that monitors the output voltage of each power supply circuit and uses this feedback information to adjust the reference voltage supplied to that circuit. This closed-loop feedback mechanism compensates for device characteristic variations, ensuring that all power supply circuits output consistent voltages despite using individually adjusted reference voltages, thus improving power supply voltage consistency.
Data Source
AI summary
A power source circuit includes: a plurality of power supply circuits which are electrically connected to different positions in a power supply wiring through which power is supplied to a plurality of processing circuits, wherein each of the power supply circuits is configured to generate a power supply voltage with reference to an input reference voltage, and supply the power supply voltage to the power supply wiring; and a reference voltage supply circuit generate a plurality of reference voltages with different voltages and to each of the plurality of power supply circuits, supply one of the different reference voltages as the input reference voltage thereof.