کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6879198 | 1443110 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Low-voltage PVT-insensitive bulk-driven OTA with enhanced DC gain in 65-nm CMOS process
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی کامپیوتر
شبکه های کامپیوتری و ارتباطات
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This paper presents a high DC gain bulk-driven operational transconductance amplifier (OTA) for low voltage applications. A cross-coupled active load is employed at the bulk-driven input stage to enhance the gain of OTA. A cross-forward (CF) gain stage was placed between the input and output stages of the OTA to enhance the output stage transconductance. The CF stage improves the phase margin of OTA and keeps the amplifier stable even for large capacitive loads (up to 50â¯pF) and also improves overall DC gain. The proposed OTA simulated using UMC 65-nm standard CMOS process, operates at a supply voltage of 0.5â¯V. Simulation results show that the OTA provides a gain of 72â¯dB at very low-frequencies. It has a phase margin of 74° and a unity gain frequency of 680â¯kHz for a load capacitance of 20â¯pF. Because of the bulk-driven input stage, the OTA achieved rail-to-rail input common-mode range. When the OTA simulated with a supply voltage of 0.35â¯V and load capacitance of 20â¯pF, the OTA provides a DC gain of 55â¯dB and a phase margin of 68° at a unity gain frequency of 617â¯kHz. The power dissipations were 3.03â¯Î¼W and 1.56â¯Î¼W for supply voltages of 0.5â¯V and 0.35â¯V, respectively. In comparison to previous works, the figure of merit of the proposed OTA has more than doubled in all respects.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: AEU - International Journal of Electronics and Communications - Volume 90, June 2018, Pages 88-96
Journal: AEU - International Journal of Electronics and Communications - Volume 90, June 2018, Pages 88-96
نویسندگان
Harikrishna Veldandi, Rafi Ahamed Shaik,