79–85GHz CMOS Amplifier with 0.35V Supply Voltage

R. Dong, K. Katayama, K. Takano, Sangyeop Lee, T. Yoshida, S. Amakawa, M. Fujishima
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Abstract

A low-power W-band CMOS amplifier with a 0.35 V supply voltage is presented. It achieves a peak gain of 12.5 dB and consumes a power of 3.1 mW. However, the maximum available gain (MAG) or maximum stable gain (MSG) of transistor degrades markedly because of the low supply voltage and the near maximum oscillation frequency, fmax. Thus, gain-boosting techniques must be employed to enhance the transistor's gain. An intuitive method, which involves drawing a set of circles, was presented to explain how the feedback network boosts the MAG to its highest value (Gmax). The method was employed in the design of the amplifier with a 0.35 V supply voltage.
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79-85GHz CMOS放大器,0.35V电源电压
设计了一种电源电压为0.35 V的低功率w波段CMOS放大器。它的峰值增益为12.5 dB,功耗为3.1 mW。然而,晶体管的最大可用增益(MAG)或最大稳定增益(MSG)由于低电源电压和接近最大振荡频率(fmax)而显著下降。因此,必须采用增益增强技术来提高晶体管的增益。提出了一种直观的方法,即画一组圆,来解释反馈网络如何将MAG提高到最大值(Gmax)。将该方法应用于电源电压为0.35 V的放大器设计中。
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