یک فیلتر Gm-C قابل تنظیم ولتاژ پایین و توان پایین برای کاربردهای بی‌سیم

محورهای موضوعی : ادوات کم مصرف

امیر باغی رهین ¹ , ضیاء‌الدین دائی کوزه کنانی ²

1 - دانشگاه آزاد اسلامی واحد سررود
2 - دانشگاه تبریز

تاریخ دریافت : 1392/12/26 تاریخ پذیرش : 1393/03/08 تاریخ انتشار : 1393/09/10

کلید واژه: تقویت کننده ترارسانایی عملیاتی (OTA), ولتاژ پایین و توان پایین, ترانزیستور FGMOS, وارونگر, فیلتر "G" _"m" "-C",

چکیده مقاله :

در این مقاله، یک تقویت کننده ترارسانایی عملیاتی (OTA) ولتاژ پایین و توان پایین با استفاده از ترانزیستور FGMOS پیشنهاد شده است. در OTA پیشنهادی در تکنولوژی TSMC 0.18 µm CMOS با ولتاژ تغذیه یک ولت و توان مصرفی ماکزیمم 40 µW، محدوده تنظیم نسبی 50 برابر به دست می‌آید. نتایج شبیه‌سازی تقویت‌کننده پیشنهادی، بهره حلقه باز 30.2 dB و فرکانس بهره واحد 942 MHz را نشان می‌دهند. در مقایسه با کارهای قبلی، تقویت کننده پیشنهادی، با ولتاژ تغذیه کمتر، عملکرد فرکانسی بهتر، سوئینگ ولتاژ خروجی بالاتر، خطینگی بهتر و توان مصرفی کمتری را عرضه می‌کند. OTA پیشنهادی در ساختار یک فیلتر "G" _"m" "-C" مرتبه دوم به کار گرفته شده و محدوده تنظیم خوب از 100 kHz تا 5.6 MHz به دست آمد که مشخصات بی‌سیم Bluetooth (فرکانس 650 kHz)، CDMA2000 (فرکانس 700 kHz) و Wideband CDMA (فرکانس 2.2 MHz) را به خوبی پوشش می‌دهد. مساحت اشغال شده سیلیکون برای فیلتر طراحی شده برابر 192μm×535μm می‌باشد.

چکیده انگلیسی:

In this paper, a low voltage and low power (LV/LP) Operational Transconductance Amplifier (OTA) using FGMOS (Floating-Gate MOS) transistor is proposed. The relative tuning range of 50 is achieved in this OTA while only consumes 40 µW with 1.0 V supply voltage in TSMC 0.18 µm CMOS technology. The simulation results of the proposed OTA show an open loop gain of 30.2 dB and a unity gain frequency of 942 MHz. In comparison with previous works, the proposed OTA, with lower supply voltage, is provided the better frequency performance, higher output voltage swing, better linearity and lower power consumption. The proposed OTA is used in the second-order  filter to show a good tuning range from 100 kHz to 5.6 MHz which is suitable for the wireless specifications of Bluetooth (650 kHz),CDMA2000 (700 kHz) and Wideband CDMA (2.2 MHz). The active area occupied by the designed filter on silicon is .

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