A High Linear and Low Power with ۷۱dB ۳۵.۱ MHz/۴.۳۸GHz Variable Gain Amplifier in ۱۸۰nm CMOS Technology

This paper proposes a new high linear, low power and wideband Variable Gain Amplifier (VGA) with the DC gain range of -۱۰.۲dB to ۶۰.۷dB. By applying the proposed idea on the folded cascode amplifier, it is possible to achieve a ۷۱dB DC gain, ۳۵MHz (-۳dB) bandwidth, accompanied with high linearity and low sensitivity as well. It is noteworthy that, the proposed idea can be able to apply on every differential amplifier too. Moreover, the total power consumption and unity gain bandwidth of the proposed VGA are ۱.۴۱mW with the power supply of ۱.۸ volts and ۴.۳۷GHz respectively, and ۰.۸pF capacitor load is applied at the output nodes of the amplifier. Furthermore, the proposed structure is simulated in whole process corners and different temperatures in the region of -۶۰ to +۹۰ °C. Simulations are performed for all corner conditions by HSPICE using the BSIM۳ model of the ۱۸۰nm CMOS technology and MATLAB software.

کلیدواژه ها:

DC gain ، folded cascode ، low power ، low voltage ، variable gain amplifier