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A Modified Regulated Cascode transimpedance amplifier with extra feed-forward path to enhance gain and bandwidth | ||
| مجله مهندسی برق دانشگاه تبریز | ||
| دوره 53، شماره 3، آبان 1402، صفحه 235-243 اصل مقاله (1.16 M) | ||
| نوع مقاله: علمی-پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22034/tjee.2023.54458.4560 | ||
| نویسندگان | ||
| زهرا سهرابی* 1؛ مریم زارع2 | ||
| 1Department of electrical engineering, Bu-Ali Sina University, Hamedan, Iran | ||
| 2Department of electrical engineering, Quchan University of technology, Quchan, Iran | ||
| چکیده | ||
| This paper presents a Transimpedance Amplifier (TIA) for high sensitivity Near Infrared Spectroscopy (NIRS). The proposed TIA is based on the Regulated Cascode (RGC) structure with an extra transistor employed to implement additional feed-forward path and achieve higher gain values. The extra transistor senses a partially amplified input signal, available in the conventional circuit, and conveys an additional ac current into the load, which provides a higher gain. In addition, a bandwidth extension method is introduced using a capacitor and resistor, which can improve amplifier’s bandwidth by 40%. The proposed TIA is designed in 0.18µm CMOS technology and achieves a transimpedance gain of 101.9dB with a -3dB bandwidth of 91.2 MHz considering 2pF of photodiode capacitance at the TIA input. The input referred noise is 4.4pA/√Hz while dissipating 151µW power. | ||
| کلیدواژه‌ها | ||
| Transimpedance Amplifier؛ Regulated Cascode؛ high-gain؛ bandwidth extension؛ NIRS | ||
| مراجع | ||
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آمار تعداد مشاهده مقاله: 206 تعداد دریافت فایل اصل مقاله: 256 |
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