Current Balancing Module for Microprocessor Power Management
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Solution Overview
Problem
The increasing power dissipation in microprocessors due to low voltage CMOS processes leads to high current requirements, which are limited by parasitic resistance in chip packaging and printed circuit boards, making it difficult to reduce voltage drop without increasing material and processing costs.
Innovation Solution
A circuit with a current balancing module, comprising a buck converter, 2:1 DC/DC converter, balanced switched capacitance device, linear push-pull regulator, and hysteresis comparator, is used to connect modules in series between reference potentials, reducing current consumption differences between modules by balancing current levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If low voltage CMOS processes are used to increase processing power, then microprocessor power and functionality improve, but current requirements increase to levels exceeding 100 A
Solution Approach 1:
The patent divides the microprocessor into multiple independent modules (first module, second module, third module, fourth module) that can be operated separately. By segmenting the processor into modules that can run at different voltages and frequencies, the system achieves high overall power while keeping individual module current requirements manageable, thus resolving the contradiction between total processor power and current level.
2Productivity
If high current levels are used to power microprocessors, then processing capability increases, but parasitic resistance causes voltage drop of 100 mV
Solution Approach 1:
The patent applies different voltage levels to different modules based on their specific power requirements. High-voltage modules receive elevated voltage supplies while low-voltage modules operate at standard voltages. This local differentiation allows the system to achieve high processing capability where needed without incurring unnecessary voltage drops and power losses in all modules, thus resolving the contradiction between processing capability and energy loss.
3Loss of energy
If parasitic resistance is reduced to less than 1 MΩ, then voltage drop decreases, but material and processing costs increase significantly
Solution Approach 1:
The patent changes the operating voltage parameter of individual modules to match their power requirements. By operating high-power modules at elevated voltages and low-power modules at standard voltages, the system achieves efficient power delivery without requiring expensive low-resistance materials or complex packaging modifications. This parameter-based approach resolves the contradiction between reducing voltage drop and maintaining ease of manufacture.
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
This solution allows microprocessors to operate at twice the voltage with half the current, effectively reducing parasitic resistance and power dissipation while maintaining efficient operation, thereby addressing the limitations of existing technologies.
Implementation Method 1
A current balancing module communicates with a node between the first and second modules and reduces a difference in current consumption between the first and second modules. The current balancing module comprises a buck converter.
Implementation Method 2
An inductance element communicates with the conduction and freewheeling switches and the node.
Implementation Method 3
A capacitance element communicates with the fourth reference potential and the node.
Implementation Method 4
The current balancing module comprises a hysteresis comparator.
Data Source
AI summary
A processing system comprises a first processing module and a second processing module that communicates with the first processing module. The first and second processing modules are connected in series between first and second reference potentials. An operating system communicates with the first and second processing modules and performs at least one of load balancing and/or throttling of the first and second processing modules to reduce a difference in current consumption between the first and second processing modules.