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首页> 外文会议>Conference on Independent Component Analyses, Wavelets, and Neural Networks Apr 22-25, 2003 Orlando, Florida, USA >Low-voltage analog-front-end processor design for ISFET-based sensor and H+ sensing applications
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Low-voltage analog-front-end processor design for ISFET-based sensor and H+ sensing applications

机译：适用于基于ISFET的传感器和H +传感应用的低压模拟前端处理器设计

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摘要

This paper presents a modular-based low-voltage analog-front-end processor design in a 0.5μm double-poly double-metal CMOS technology for Ion Sensitive Field Effect Transistor (ISFET)-based sensor and H+ sensing applications. To meet the potentiometric response of the ISFET that is proportional to various H+ concentrations, the constant-voltage and constant current (CVCS) testing configuration has been used. Low-voltage design skills such as bulk-driven input pair, folded-cascode amplifier, bootstrap switch control circuits have been designed and integrated for 1.5V supply and nearly rail-to-rail analog to digital signal processing. Core modules consist of an 8-bit two-step analog-digital converter and bulk-driven pre-amplifiers have been developed in this research. The experimental results show that the proposed circuitry has an acceptable linearity to 0.1 pH-H+ sensing conversions with the buffer solution in the range of pH2 to pH12. The processor has a potential usage in battery-operated and portable healthcare devices and environmental monitoring applications.
机译：本文介绍了一种基于模块的低压模拟前端处理器设计，该设计采用0.5μm双多晶硅双金属CMOS技术，适用于基于离子敏感场效应晶体管（ISFET）的传感器和H +传感应用。为了满足与各种H +浓度成正比的ISFET的电位响应，已使用了恒压和恒流（CVCS）测试配置。低压设计技能，例如大容量驱动输入对，折叠共源共栅放大器，自举开关控制电路，已经设计并集成到1.5V电源和近乎轨到轨的模数转换处理中。核心模块由一个8位两步模数转换器组成，该研究已经开发了大容量驱动的前置放大器。实验结果表明，在缓冲溶液的pH2至pH12范围内，拟议的电路在0.1 pH-H +感测转换方面具有可接受的线性。该处理器在电池供电的便携式医疗设备和环境监测应用中具有潜在的用途。

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