A 90 dB 1.32 mW 1.2 V 0.13 mm~2 Two-Stage Variable Gain Amplifier in 0.18 μm CMOS

摘要

An all CMOS variable gain amplifier (VGA) which features wide dB-linear gain range per stage (45 dB), low power consumption (1.32mW), small chip size (0.13mm2), and low supply voltage (1.2 V) is described. The dB-linear range is extended by reducing the supply voltage of the conventional V-to-/ converter. The two-stage VGA implemented in 0.18μm CMOS offers 90 dB of gain variation, 3dB bandwidth of greater than 21 MHz, and max/min input IP3 and P1 dB, respectively, of -5/-42 and-12/-50dBm.