ADC Clock Generation Circuit for High-Speed Conversion
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Solution Overview
Problem
Successive approximation analog-to-digital converters face challenges in high-speed applications due to the complexity and increased power consumption of clock circuits, especially when operating at frequencies above 100M, which affects system performance and efficiency.
Innovation Solution
A cascaded clock generation circuit utilizing delay modules and logic gate modules to convert a low-frequency external clock signal into multiple high-frequency internal clock signals, reducing system complexity and power consumption by generating internal clocks through a series of delay and logic gate stages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a high-frequency external clock signal is used for high-speed ADC operation, then the conversion speed is improved, but the system complexity and power consumption increase significantly
Solution Approach 1:
The patent changes the frequency parameter of the clock signal by using a frequency divider circuit that divides a high-frequency external clock signal to generate multiple lower-frequency internal clock signals. This allows the ADC to operate at high speed while the external clock source can be at a lower frequency, reducing system complexity and power consumption.
Solution Approach 2:
The patent segments the clock signal generation into multiple stages using cascaded delay modules and logic gate modules. Each stage generates clock signals at different frequencies, allowing the system to use a single external clock source to generate multiple internal clock signals with different frequencies, thereby simplifying the overall clock circuit architecture.
2Adaptability or versatility
If multiple internal clock signals with different frequencies are generated, then flexible clock selection is achieved, but the clock circuit complexity increases
Solution Approach 1:
The patent implements a universal clock generation circuit that can generate multiple internal clock signals with different frequencies from a single external clock source. The cascaded delay modules and logic gate modules work together to provide multi-functionality, allowing the same circuit structure to generate various clock frequencies needed by different ADC modules.
Solution Approach 2:
The patent uses a nested structure where delay modules are cascaded in series, with each delay module containing logic gate modules that further process the clock signals. This nested arrangement allows compact generation of multiple clock frequencies within a hierarchical structure, improving space utilization and signal distribution efficiency.
Data Source
AI summary
An analog-to-digital converter and a clock generation circuit thereof are provided. The clock generation circuit comprises cascaded clock generation modules. The clock generation module at each stage is configured to generate a corresponding internal clock signal, and each stage of the clock generation module comprises a delay module and a logic gate module. The second input end of the N-th stage of the logic gate module is connected to the output end of the previous stage of the logic gate module, and the output end of the logic gate module is configured to output an internal clock, so that each stage of the clock generation module can generate one internal clock signal.