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Journals / Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi / 2026 / Cilt: 25 Sayı: 73

Microcontroller Based Flexible, Powerful Digital Delay Pulse Generator System Design and Optoelectronic Applications

Mikrodenetleyici Tabanlı Esnek, Güçlü Dijital Gecikmeli Darbe Üreteci Sistem Tasarımı ve Optoelektronik Uygulamaları

Tayyar Güngör(MEHMET AKİF ERSOY ÜNİVERSİTESİ)0000-0003-2518-9535
Ebru Güngör(MEHMET AKİF ERSOY ÜNİVERSİTESİ)0000-0001-8947-8753
Pages
255–262
Publication Date
2023-01-26
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

In addition, deep-level transient spectroscopy (DLTS) is a preferable system for the characterization of semiconductor materials such as photo-excited current transient spectroscopy (PICTS) because it is easy to use and cheaper than commercial double-sampling systems.

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, a multi-channel digital delayed pulse generator (DDPG) with adjustable channel width, mainly based on microcontroller, has been designed.
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Key Findings & Data:In this system, 25 different time-base signals were generated between 1µs-1s by using microcontroller (PIC18F4550), crystal oscillator (8 MHz) and 4 input 16 output encoder/decoder IC (74LS154).
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Conclusion & Impact:In addition, deep-level transient spectroscopy (DLTS) is a preferable system for the characterization of semiconductor materials such as photo-excited current transient spectroscopy (PICTS) because it is easy to use and cheaper than commercial double-sampling systems.
🔬Design:Araştırma Makalesi
📍Scope:Comprehensive Sample
⚙️Variables:Dijital geçikmeli darbe üreteci · Örnekle-tut · gated-entegratör

Abstract

In this study, a multi-channel digital delayed pulse generator (DDPG) with adjustable channel width, mainly based on microcontroller, has been designed. In this system, 25 different time-base signals were generated between 1µs-1s by using microcontroller (PIC18F4550), crystal oscillator (8 MHz) and 4 input 16 output encoder/decoder IC (74LS154). After the trigger signal, 32-channel time-delayed digital pulse signals are obtained sequentially at the selected time-base width. The DDPG system was first tested with the Signal Analysis Unit (SAU), which also includes a 2-channel sample-and-hold circuit of the signal amplitude values corresponding to two selected time window values within one full period of the reference triangular signal whose amplitude-time dependence is known. The obtained results were compared with the known real values. It was observed that the results were compatible. It was then used to determine the mathematical form of the photocurrent over time, which is produced by pulsed illumination at room temperature for a light-sensitive resistor (LDR), which is a commercial product. As a result, an automatic data acquisition system with fast, functional and flexible features has been realized with this new microcontroller-based multi-channel DDPG and SAU. In addition, deep-level transient spectroscopy (DLTS) is a preferable system for the characterization of semiconductor materials such as photo-excited current transient spectroscopy (PICTS) because it is easy to use and cheaper than commercial double-sampling systems.

Özet

Bu çalışmada, esas olarak mikrodenetleyici tabanlı çok kanallı ve kanal genişliği ayarlanabilen bir dijital geçikmeli darbe üreteci (DGDÜ) tasarımı gerçekleştirilmiştir. Bu sistemde mikrodenetleyici (PIC18F4550), kristal osilatör (8 MHz) ve 4 giriş 16 çıkışlı kodlayıcı/kodçözücü entegresi (74LS154) kullanarak 1µs-1s arasında 25 farklı genişlikte zaman-taban sinyalleri üretilmiştir. Tetikleme sinyalinden sonra seçilen zaman-taban genişliğinde ardışık olarak 32 kanallı zaman-geçiktirme dijital darbe sinyalleri elde edilmiştir. DGDÜ sistemi, ilk olarak genlik-zaman bağımlılığı bilinen referans üçgensel sinyalin bir tam periyodu içinde seçilen iki zaman pencere değerine karşı gelen sinyal genlik değerlerinin 2-kanallı örnekle-tut devresinin de bulunduğu Sinyal Analiz Birimi (SAB) ile test edilmiştir. Elde edilen sonuçların bilinen gerçek değerler ile karşılaştırılması yapılmıştır. Sonuçların uyumlu olduğu gözlenmiştir. Daha sonra ticari bir ürün olan ve ışığa duyarlı bir direnç (LDR) için oda sıcaklığında, kesikli aydınlatma ile oluşan foto-akımın zamanla matematiksel formunun belirlenmesi için kullanılmıştır. Sonuç olarak, bu yeni mikrodenetleyici tabanlı çok kanallı DGDÜ ve SAB ile hızlı, işlevsel ve esnek özellikleri olan bir otomatik veri toplama sistemi gerçekleştirilmiştir. Ayrıca derin seviyeli transient spektroskopi (DLTS), foto-uyarımlı akım transiyent spektroskopisi (PICTS) gibi yarıiletken mazlemelerin karakterizasyonları için kullanımı kolay ve ticari çift-örnekleme sistemlerine göre daha ucuz olması nedeniyle tercih edilebilir bir sistemdir.

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Cite This Article

Güngör, T., Güngör, E. (2023). Microcontroller Based Flexible, Powerful Digital Delay Pulse Generator System Design and Optoelectronic Applications. Dokuz Eylül Üniversitesi Mühendislik Fakültesi Fen ve Mühendislik Dergisi, Cilt: 25 Sayı: 73, 255–262. https://doi.org/10.21205/deufmd.2023257320

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