Multi-Frequency Oscillator Mode Selection for Shared Clock Drivers
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Solution Overview
Problem
Current computing platform clocking systems face challenges in efficiently supporting multiple reference frequencies due to architecture limitations, leading to increased power consumption and complexity in designing separate clock drivers for different resonators, which hinders the ability to switch between low power and high-performance modes effectively.
Innovation Solution
The implementation of a high-quality oscillator driven by a lower quality oscillator that actively selects the resonant frequency, using impedance-guided injection to lock into the desired mode and mitigate parasitic resonance modes, thereby reducing the need for additional circuitry and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate clock drivers are designed for multiple resonators to support different reference frequencies, then the system can operate in different power modes (low power and high performance), but the device complexity and area requirements increase
Solution Approach 1:
The patent implements a single clock driver circuit that can operate with multiple different resonators (e.g., 32.768 kHz for low power mode, 19.2 MHz for high performance mode) by selectively connecting different resonators to the same driver. This multi-functional approach allows the system to adapt to different power modes without requiring separate dedicated clock drivers for each frequency, thereby reducing device complexity while maintaining versatility.
Solution Approach 2:
The patent merges the functionality of multiple clock drivers into a single unified clock driver circuit that can service multiple resonators. By combining what would traditionally be separate driver circuits into one shared resource, the system reduces the overall number of components, decreases area requirements, and simplifies the clocking architecture while still supporting multiple operating frequencies and power modes.
2Adaptability or versatility
If multiple separate clock drivers are designed for multiple resonators, then different reference frequencies can be supported, but the power consumption increases
Solution Approach 1:
The patent employs periodic switching between different resonators based on operational requirements. The system dynamically selects which resonator to use (e.g., switching between low frequency for power saving and high frequency for performance) rather than continuously operating all clock drivers. This periodic activation approach allows the system to support multiple reference frequencies while minimizing power consumption by activating only the necessary clock driver-resonator pair at any given time.
3Area of stationary object
If a single resonator is used with a clock driver, then area requirements are reduced, but the ability to switch between different reference frequencies is limited
Solution Approach 1:
The patent implements dynamic resonator selection capability where a single clock driver can be dynamically reconfigured to work with different resonators based on system needs. The clock driver includes switching mechanisms that allow it to adaptively connect to different resonators (e.g., switching between 32.768 kHz and 19.2 MHz resonators) during operation, providing frequency agility without requiring multiple permanently dedicated drivers, thus optimizing area usage while maintaining versatility.
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 allows for reliable multi-frequency resonator operation with reduced power consumption and area requirements, enabling efficient switching between different operational modes without the need for multiple phase-locked loops, thus improving performance and power management.
Implementation Method 1
a resonator circuit (108) configured to resonate at a fundamental frequency and a different, non-fundamental frequency
Implementation Method 2
a startup circuit (101) configured to generate a signal at about the non-fundamental frequency
Data Source
AI summary
An apparatus, system, and method for multi-frequency oscillator control are provided. A circuit can include a resonator circuit including an input and an output, the resonator circuit configured to resonate at a fundamental frequency and a different, non-fundamental frequency, a startup circuit electrically coupled to the input, the startup circuit configured to generate a signal at about the non-fundamental frequency and detect when the resonator circuit is resonating at the non-fundamental frequency, and an oscillator driver circuit electrically coupled to the output, the oscillator driver circuit configured to amplify and buffer the output of resonator circuit and drive a load.