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首页> 美国卫生研究院文献>Sensors (Basel Switzerland) >Design of Signal Generators Using Active Elements Developed in I3T25 CMOS Technology Single IC Package for Illuminance to Frequency Conversion
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Design of Signal Generators Using Active Elements Developed in I3T25 CMOS Technology Single IC Package for Illuminance to Frequency Conversion

机译：使用I3T25 CMOS技术开发的有源元件设计信号发生器用于单路IC封装实现照度到频率的转换

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摘要

This paper presents a compact and simple design of adjustable triangular and square wave functional generators employing fundamental cells fabricated on a single integrated circuit (IC) package. Two solutions have electronically tunable repeating frequency. The linear adjustability of repeating frequency was verified in the range between 17 and 264 kHz. The main benefits of the proposed generator are the follows: A simple adjustment of the repeating frequency by DC bias current, Schmitt trigger (threshold voltages) setting by DC driving voltage, and output levels in hundreds of mV when the complementary metal-oxide semiconductor (CMOS) process with limited supply voltage levels is used. These generators are suitable to provide a simple conversion of illuminance to frequency of oscillation that can be employed for illuminance measurement and sensing in the agriculture applications. Experimental measurements proved that the proposed concept is usable for sensing of illuminance in the range from 1 up to 500 lx. The change of illuminance within this range causes driving of bias current between 21 and 52 μA that adjusts repeating frequency between 70 and 154 kHz with an error up to 10% between the expected and real cases.
机译：本文介绍了采用在单个集成电路（IC）封装上制造的基本单元的可调节三角波和方波函数发生器的紧凑而简单的设计。两种解决方案具有电子可调的重复频率。在17至264 kHz之间的范围内，验证了重复频率的线性可调性。所提出的发生器的主要优点如下：通过直流偏置电流简单调整重复频率，通过直流驱动电压设置施密特触发器（阈值电压），当互补金属氧化物半导体（使用电源电压电平受限的CMOS工艺。这些发生器适用于提供照度到振荡频率的简单转换，该转换可用于农业应用中的照度测量和传感。实验测量证明，提出的概念可用于从1到500 lx的照度传感。在此范围内的照度变化会导致驱动21至52μA之间的偏置电流，从而在70至154 kHz之间调整重复频率，在预期情况与实际情况之间的误差高达10％。

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