تقویت‏کننده کم‏نویز تمام‏تفاضلی CMOS با سطح منبع تغذیه پایین و بهره توان بالا برای کاربردهای فراپهن‏باند

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه بیرجند

چکیده

در این مقاله یک تقویت‏کننده کم‏نویز تمام‏تفاضلی جدید برای کاربردهای فراپهن‏باند ارائه شده است. تقویت‏کننده پیشنهادشده شامل طبقه‏ی ورودی گیت‏مشترک برای بهبود تطبیق امپدانس و طبقه دوم سورس مشترک برای افزایش بهره و کاهش نویز تقویت‏کننده است. همچنین از فیدبک ترانزیستوری موازی-موازی برای افزودن درجه آزادی در انتخاب ترارسانایی ترانزیستور ورودی و بهبود پهنای باند و خطسانی استفاده شده است. تقویت‏کننده کم‏نویز پیشنهادشده بر اساس فنّاوری µm 18/0 CMOS RF-TSMC طراحی و با استفاده از نرم‏افزار ADS شبیه‏سازی شده است. این تقویت‏کننده در پهنای باند GHz 7-4، دارای بهره توان مسطح (S21) dB 25/0± 17، عدد نویز کمتر از dB 7/2، تلفات بازگشتی ورودی (S11) کمتر از dB 10- و خط­سانی (IIP3) dBm 1- است. توان مصرفی آن نیز mW 5/8 از منبع تغذیه V 75/0 است. ‌

کلیدواژه‌ها


عنوان مقاله [English]

A Low Voltage, High Gain, Fully Differential CMOS Low-Noise Amplifier for Ultra-Wideband Applications

چکیده [English]

In this paper, a novel fully differential low-noise amplifier (LNA) has been presented for ultra-wideband (UWB)
applications.  The  proposed  LNA  consists  of  a  common-gate  input  stage  to  improve  the  input  impedance
matching and a common source second stage to amplify the input signal while reducing the noise figure (NF). A
shunt-shunt transistor feedback is also applied to add a degree of freedom to the trans-conductance (gm) of the
input stage and to achieve wide bandwidth and high linearity. The proposed LNA is designed and simulated in
the RF-TSMC 0.18 μm CMOS process technology by the Advanced Design System (ADS). The simulation results
show a flat power gain (S21) of 17±0.25 dB, a noise figure less than 2.7 dB, an input (S11) less than -10 dB and
high linearity with input third-order intercept point (IIP3) of -1 dBm, over the frequency band of 4-7 GHz. The
proposed LNA has low power dissipation of 8.5 mW from the 0.75 V power supply.

کلیدواژه‌ها [English]

  • Low noise amplifier
  • Fully differential
  • Linearity
  • Shunt-shunt feedback
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