A Modified Noise Analysis of a Common Source ̶ Common Gate Low Noise Transconductance Amplifier for Sub-micron Technologies
Publish Year: 1397
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJE-31-11_013
تاریخ نمایه سازی: 10 آذر 1398
Abstract:
This paper is based on analysis of a common source - common gate low noise transconductance amplifier (CS-CG LNTA). Conventional noise analyses equations are modified by considering to the low output impedance of the sub-micron transistors and also, parasitic gate-source capacitance. The calculated equations are more accurate than calculated equations in other works. Also, analyses show that the noise of the tail transistor, which is utilized to bias the common gate transistor, will limit noise canceling advantages. So, the common gate transistor is biased by a resistor. That leads to a significant improvement in noise figure. By utilizing a Taylor series expression, a closed-form equation is obtained to calculate IIA3 for the first time. Finally, based on the calculated equation a design procedure is proposed.
Keywords:
Low Noise Amplifier , Low Noise Trans-conductance Amplifier , Noise canceling LNTA , Surface Acoustic Wave -less receiver , Wideband receiver
Authors
M. Javadi
Department of Electronics, School of Electrical and Computer Engineering, Noshirvani University of Technology, Babol, Mazandaran, Iran
H. Miar-Naimi
Department of Electronics, School of Electrical and Computer Engineering, Noshirvani University of Technology, Babol, Mazandaran, Iran
S. M. Hosseini-Andargoli
Department of Electronics, School of Electrical and Computer Engineering, Noshirvani University of Technology, Babol, Mazandaran, Iran