A Novel Low Voltage, Low Power and High Gain Operational Amplifier Using Negative Resistance and Self Cascode Transistors
Publish Year: 1391
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJE-26-3_001
تاریخ نمایه سازی: 17 خرداد 1393
Abstract:
In this work, a low power, low voltage and high gain operational amplifier is proposed. For this purpose, a negative resistance structure is used in parallel with output to improve the achievable gain.Because of using self cascode transistors in the output, the proposed structure remains approximatelyconstant in a relatively large output voltage swing causing an invariable gain. To evaluate the proposed method an op amp was designed in 0.18μm CMOS technology. The simulation results showed a gain of 84dB, unity gain bandwidth of 12.45MHz and phase margin of 81 degree; with 1V power supply and 1pF load capacitor.
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Authors
m fallah
Department of Electrical Engineering, Babol University of Technology, Iran
h. Miar Naimi
Department of Electrical Engineering, Babol University of Technology, Iran