Signal Processing Circuit Design and Application for Infrared Optical System Based on FPGA

2013 ◽  
Vol 347-350 ◽  
pp. 1328-1332
Author(s):  
Xiao Dong Cai ◽  
Zhi Gang Liu
Keyword(s):  
Signal Processing ◽  
Circuit Design ◽  
Optical System ◽  
Signal To Noise Ratio ◽  
Cutoff Frequency ◽  
In Series ◽  
Programmable Gain Amplifier ◽  
Signal Processing Circuit ◽  
Programmable Gain ◽  
Processing Circuit

The signal processing circuit based on FPGA was proposed in the paper, carrying out the function such as programmable signal amplification, adaptive filtering and so on. Among them, the programmable amplifier module was achieved with the programmable gain amplifier in series; Adaptive filter module was implemented with the Butterworth second-order active filter, to change the cutoff frequency of the filter by changing the potentiometer resistance. Experimental results show that the signal processing circuit was applied in the infrared optical system improving the signal to noise ratio of the image effectively.

Design of Electro Cardiograph Machine Based on Atmega Microcontroller

2016 ◽  
Vol 2 (2) ◽  
pp. 328
Author(s):  
Bambang Guruh Irianto ◽  
Budhiaji Budhiaji ◽  
Syaifudin Syaifudin
Keyword(s):  
Signal Processing ◽  
Circuit Design ◽  
Experimental Research ◽  
Ecg Signal ◽  
Circuit Testing ◽  
Considerable Cost ◽  
Ecg Signal Processing ◽  
Independent Variable ◽  
Signal Processing Circuit ◽  
Processing Circuit

ECG machine on the market, has a considerable cost, the technology used is still very complicated. In efficient and display ECG still not interconnect with other devices. In this study, the researchers designed ECG machine 12 channels to take advantage ATMega microcontroller technology, Graphic LCD 64x12, which can be obtained on the market at low prices, thus yielding a portable ECG apparatus, can interconnect with other devices and cheap. Objective is to design a  ECG machine using ATMega microcontroller technology, by making a series of bio amplifier ECG, measuring the amplitude and frequency response bio amplifier, and make the ECG signal processing circuit with microcontroller, which can be displayed on a 128x64 graphic LCD or PC. To answer the research objectives, the design of the research is to use pure experimental research is the design of experimental series. The independent variable ECG phantom or human and the dependent variable is the ECG machine. While the design  ECG machine  through the stages as follows: circuit design, circuit testing and calibration output. The conclusion of this study: The result of the design of microcontroller ATMega program listings can be used transform and run the program to the ECG machine to know the number of heartbeats, a beep sound every wave R  the ECG signal, displayed on the graphical LCD, PC, printed through a computer, and can be stored in computer.

scholarly journals Dynamic FPAA-based Mixed-Signal Processing Circuit for Thin-Film CdTe/Lead-Free Perovskite Photodetectors

2021 ◽  
Vol 27 (2) ◽  
pp. 22-30
Author(s):  
Ivailo M. Pandiev ◽  
Mariya P. Aleksandrova
Keyword(s):  
Signal Processing ◽  
Moving Objects ◽  
Cdte Film ◽  
Electrical Signal ◽  
Lead Free ◽  
Mixed Signal ◽  
Precise Position ◽  
Smooth Change ◽  
Signal Processing Circuit ◽  
Processing Circuit

New photodetector structure combining thinned CdTe film with lead-free perovskite photoelectric film was produced and investigated. This setting of the CdTe thickness results in photodetector parameters’ competitiveness to the state-of-the-art in the field of advanced photoelectric materials. The device shows a promising sensitivity of ~40 μA/W, maximum responsivity of 10.6 mA/W at 460 nm, equal rise and fall times of 30 ms, and high linearity (maximum linearization error is less than 0.6 %). However, the optoelectronic performance of CdTe/lead-free perovskite structures integrated with signal processing circuit remains unexplored. For this purpose, Field Programmable Analogue Array (FPAA)-based mixed-signal processing circuit is developed for pulse width modulated electrical signal with duty cycle controlled by the illumination degree of the detecting photoelement. This novel approach guarantees a smooth change of the electrical output at a smooth change of the input illumination between the light and dark switching states and can be practically applied as a precise position detector of moving objects. The paper represents a synergistic connection between microelectronics, electronics, and signal technology.

Signal Processing Circuit for Spirometry

2019 ◽  
Author(s):  
C. Vasilache ◽  
D. Dobrescu ◽  
E. Franti ◽  
O.G. Profirescu ◽  
M. Dascalu ◽  
...  
Keyword(s):  
Signal Processing ◽  
Signal Processing Circuit ◽  
Processing Circuit
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