Multi-Rate Clock Buffer Using Selective Tuned Circuit Switching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional clock buffers tuned for specific frequencies experience reduced performance and increased power consumption when faced with varying clock signal frequencies, often requiring separate buffers or untuned configurations, which are inefficient.
Innovation Solution
A multi-rate clock buffer circuit design that includes multiple tuned circuits, each configured for different frequency ranges, allowing the circuit to dynamically switch between active and inactive states based on the clock signal frequency, thereby supporting multiple frequencies without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a clock buffer is tuned to a specific frequency to reduce power consumption, then power consumption is reduced, but performance deteriorates when the clock signal frequency varies
Solution Approach 1:
The clock buffer is divided into multiple independently controllable tuned circuits, each optimized for a specific frequency range. This segmentation allows the system to activate only the circuit matching the current frequency, reducing power consumption while maintaining frequency-specific performance optimization.
Solution Approach 2:
The system dynamically switches between different tuned circuits based on the detected clock signal frequency. This dynamic adaptation ensures that the buffer always operates with the optimally tuned circuit active, maintaining high performance across varying frequencies while minimizing power consumption by keeping inactive circuits in low-power states.
2Reliability
If separate clock buffers are used for different frequencies to maintain performance, then performance is maintained, but device complexity increases
Solution Approach 1:
Multiple tuned circuits are merged into a single clock buffer device with shared control logic and output stages. This consolidation maintains the performance benefits of frequency-specific tuning while reducing overall device complexity compared to using completely separate buffer circuits for each frequency.
Solution Approach 2:
The clock buffer is designed as a universal device that can handle multiple frequency ranges through its array of tuned circuits. A single device with multi-functional capability replaces what would otherwise require multiple dedicated buffers, simplifying the overall system architecture while maintaining performance across all supported frequencies.
3Adaptability or versatility
If an untuned clock buffer configuration is used to support multiple frequencies, then frequency versatility is improved, but power consumption increases
Solution Approach 1:
The system periodically evaluates the input clock signal frequency and switches between tuned circuits accordingly. This periodic monitoring and switching enables the buffer to adapt to frequency changes while maintaining optimal power efficiency by activating only the necessary tuned circuit for the current frequency range.
Data Source
AI summary
A system may include a driver circuit configured to receive a clock signal. The system may also include a first tuned circuit and a second tuned circuit. The first tuned circuit and the driver circuit may be collectively tuned according to a first frequency range. The first tuned circuit may be configured to be active when a rate of the clock signal is within the first frequency range and to be inactive when the rate is outside of the first frequency range. Further, the second tuned circuit and the driver circuit may be collectively tuned according to a second frequency range that is different from the first frequency range. The second tuned circuit may be configured to be active when the rate is within the second frequency range and to be inactive when the rate is outside of the second frequency range.