Yazar "Yelten, Mustafa Berke" seçeneğine göre listele

Listeleniyor 1 - 3 / 3
  • Küçük Resim Yok
    Öğe
    Reliability of 3D-Printed Dynamic Scanners
    (IEEE, 2017) Gonultas, Burak Mert; Aygun, Sacid; Khayatzadeh, Ramin; Civitci, Fehmi; Gokdel, Yigit Daghan; Yelten, Mustafa Berke; Ferhanoglu, Onur
    3D-printed dynamic structures have arisen as a lower cost and easier to fabricate alternative to miniaturized sensor and actuator technologies. Here, we investigate the reliability of a selected 3D-printed laser scanner, which was initially designed for miniaturized confocal imaging, having 1 x 1 cm' footprint. The scan-line, 1 resonant frequency and quality factor of 3 devices were monitored for 100,000,000 (hundred million) cycles, and an average deviation of <6% was observed for all three parameters under investigation, for the devices under test. We conclude that 3D printed dynamic structures are promising candidates for a variety of applications, including optomedical imaging applications that demand disposable and low-cost scanning technologies.
  • Küçük Resim Yok
    Öğe
    Reliability Testing of 3D-Printed Polyamide Actuators
    (IEEE-Inst Electrical Electronics Engineers Inc, 2020) Kasap, Gokce; Gokdel, Yigit Daghan; Yelten, Mustafa Berke; Ferhanoglu, Onur
    3D printing is a rapidly emerging low-cost, high-yield, and high-speed manufacturing technique that has already been utilized in fabricating sensor and actuator devices. Here we investigate the cyclic fatigue and the effect of heating on 10 x 10 mm2-sized, 3D-printed polyamide-based laser scanning electromagnetic actuators, which are intended for integration with miniaturized laser-scanning imagers to yield a wide variety of optical imaging modalities. The tested actuators offer compact sizes and high-scan angles, comparable to their MEMS counterparts. We have tested N = 15 devices, at 5 different total optical scan angles between 40 degrees - 80 degrees, and observed their lifetimes (up to 108 cycles approximate to 10 days each), as well as the variability in their scan angle and mechanical resonance. A selected scanner was also tested under increased temperature conditions up to 60 degrees C for 10 hours, showing no sign of fatigue when returned to room temperature. Overall, it is concluded that 3D printed polymeric actuators are promising low-cost alternatives for short-term use in disposable opto-medical imaging units.
  • Küçük Resim Yok
    Öğe
    Sige Bicmos Proses Ile 12bit Ve 2gsps Hızında Bir Analog Dijital Çevirici (Analog Digital Converter) Tasarlanması
    (2018) Karalar, Tufan Coşkun; Aygün, Sacid; Karabeyoğlu, Enver Derun; Çavdar, Zeynep Burcu; Yelten, Mustafa Berke
    Bu projede 0.13u BiCMOS prosesinde bir ADC tasarlanmıştır. ADC?nin hedeflenen örnekleme hızı 1.5Gsps ve hedeflenen SFDR çözünürlüğü 11bit olarak belirlenmiştir. Pipeline mimarisinde ADC tasarlanmıştır. Her biri 1.5bit çıkışı olan 8 kademe ve ardından 3bitlik bir Flash çevirici kullanılmıştır. Kademeler için mümkün olan her yerde ayrı güç kaynağı regülatörler kullanılarak kademeler arası etkileşim azaltılmıştır. Yüksek hızlarda saatin girişi ve sonuçların çıkışı için ayrı clock tree yapıları kullanılmıştır. Üzerinde band gap, seri arayüz clock üretici blok gibi modüller de içeren tasarım örnekleri kayıt etmek için bir memory de içermektedir.