High-Resolution & High-Dynamic Range Two-Level Adjustable Flash ADC for Sensor Systems
Location
Ada, Ohio
Start Date
3-12-2024 12:00 AM
End Date
3-12-2024 12:00 AM
Description
Throughout the history of computing, the battle between high resolution, low hardware cost, and low processing time has always been an issue. The proposed analog-to-digital converter promises a two-level solution that utilizes a coarse (3-bit) and fine (10-bit) ADC as a hybrid alternative to maximize hardware cost while minimizing the processing time. The circuit employs the coarse ADC to decide the region of the signal and the MSBs of the output. A set of eight differential op-amps signal conditions the input, whose output is chosen based on an eight-to-one multiplexer with selected bits of the coarse ADC. The solution creates a 13-bit input with a high dynamic range of around 80 dB. Furthermore, a novel NMOS-based active pixel sensor (APS) is described as one that utilizes a logarithmic step signal to control the desaturation of the capacitor and improve the dynamic range of the input. Together, both the suggested sensor and the multi-level Flash ADC can be combined and used in either the medical industry or in modern camera technology.
Recommended Citation
Berei, Ethan, "High-Resolution & High-Dynamic Range Two-Level Adjustable Flash ADC for Sensor Systems" (2024). College of Engineering Student Research Colloquium. 19.
https://digitalcommons.onu.edu/eng_student_research_colloquium/2024/Presentations/19
High-Resolution & High-Dynamic Range Two-Level Adjustable Flash ADC for Sensor Systems
Ada, Ohio
Throughout the history of computing, the battle between high resolution, low hardware cost, and low processing time has always been an issue. The proposed analog-to-digital converter promises a two-level solution that utilizes a coarse (3-bit) and fine (10-bit) ADC as a hybrid alternative to maximize hardware cost while minimizing the processing time. The circuit employs the coarse ADC to decide the region of the signal and the MSBs of the output. A set of eight differential op-amps signal conditions the input, whose output is chosen based on an eight-to-one multiplexer with selected bits of the coarse ADC. The solution creates a 13-bit input with a high dynamic range of around 80 dB. Furthermore, a novel NMOS-based active pixel sensor (APS) is described as one that utilizes a logarithmic step signal to control the desaturation of the capacitor and improve the dynamic range of the input. Together, both the suggested sensor and the multi-level Flash ADC can be combined and used in either the medical industry or in modern camera technology.