Multiloop Feedback Compensation-Based Photometer Circuit

Wilmar Hernández

doi:10.1109/TIM.2024.3458034

2024-01-01

Wilmar Hernández *

Francisco José Arqués Orobón

Vicente González‐Posadas

José Luis Jiménez-Martín

DOI：10.1109/TIM.2024.3458034

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摘要

En 中文

A photometer circuit based on a multiloop feedback compensation (PCBMFC) is presented. This circuit employs both positive and negative feedbacks, operates in a fully linear photovoltaic mode, and can be utilized to perform high-precision measurements. Prototypes of PCBMFC were built using both the AD820 precision operational amplifier (op-amp) and the TL084 general-purpose op-amp. The performance of PCBMFC and the performance of the classic photometer circuit (CPC) based on the transimpedance amplifier (TA) were compared with each other through laboratory experiments. A comparison of the error energy of measurement revealed that CPC is 2.2982 times worse than PCBMFC when using the AD820 op-amp, and CPC is 482.1006 times worse than PCBMFC when using the TL084 op-amp. Furthermore, the circuit robustness improvement against external disturbances of PCBMFC versus CPC was demonstrated throughout simulations. Moreover, a Wilcoxon signed-rank test (WSRT) showed that there were statistically significant differences between CPC and PCBMFC at both the 1% and 5% significance levels.

Keyword:

Resistors

Photodiodes

Voltage measurement

Transfer functions

Robustness

Prototypes

Photovoltaic systems

Photodiode

photometer circuit

photovoltaic mode operation

transimpedance amplifier (TA)