Inductive Coupling Structure for Clock Signal Synchronization
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Solution Overview
Problem
Integrated circuits face errors due to differences in clock signal arrival times, leading to increased power consumption and voltage drops, particularly in clock trees which consume 20% to 40% of total power, as they struggle to distribute clock signals efficiently at higher frequencies.
Innovation Solution
Implementing oscillators with magnetic coupling, master-slave fine-tuning, and pulse injection mechanisms to synchronize oscillating signals, replacing traditional clock trees, and using inductive and capacitive devices to stabilize and phase-align signals across the circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional clock trees are used to distribute clock signals, then clock synchronization is achieved, but power consumption increases significantly (20% to 40% of total power)
Solution Approach 1:
The patent extracts the clock signal distribution function from the traditional clock tree architecture and implements it through individual oscillators at each circuit block. Each oscillator generates its own clock signal locally, eliminating the need for extensive clock tree distribution networks and their associated power consumption.
Solution Approach 2:
The centralized clock distribution system is segmented into multiple independent oscillators distributed across different circuit blocks. Each oscillator operates independently but maintains synchronization through magnetic coupling, replacing the hierarchical clock tree structure with distributed oscillation units.
2Speed
If clock trees operate at higher frequencies to meet performance requirements, then signal distribution speed improves, but power consumption increases
Solution Approach 1:
Each circuit block contains its own oscillator that generates clock signals locally, eliminating the need for high-frequency signal transmission through long clock tree branches. The oscillators self-synchronize through magnetic coupling, maintaining high frequency operation without the power penalty of extensive high-speed distribution networks.
3Reliability
If clock buffers are added to maintain signal integrity in clock trees, then signal quality improves, but voltage drops increase due to huge current draw
Solution Approach 1:
The patent removes the need for clock buffers by generating clock signals locally at each circuit block through distributed oscillators. This eliminates the high current draw through buffer stages that causes voltage drops on the power supply grid.
Solution Approach 2:
Magnetic coupling structures serve as intermediaries to synchronize oscillators across circuit blocks without requiring direct electrical connection or high-current buffer stages. The magnetic field acts as a low-power mediation mechanism for signal synchronization.
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 approach minimizes frequency and phase differences among oscillating signals, reducing power consumption and voltage drops, thereby enhancing the performance and efficiency of integrated circuits by optimizing signal distribution without the need for extensive clock tree networks.
Implementation Method 1
a first inductive device of a first oscillator is magnetically coupled with a second inductive device of a second oscillator through the coupling structure
Data Source
AI summary
A circuit includes a coupling structure and a first inductive device. The coupling structure includes two or more conductive loops and a set of conductive paths electrically connecting the two or more conductive loops. The first inductive device is magnetically coupled with a first conductive loop of the two or more conductive loops.