Portal de Periódicos da CAPES

Micro-Power Amplifiers for Wireless PAN Applications

2005; Institute of Electrical and Electronics Engineers; Linguagem: Inglês

10.1109/mwsym.2005.1616528

2576-7216

Bevin Perumana, Chang-Ho Lee, Sudipto Chakraborty, Joy Laskar,

GaN-based semiconductor devices and materials

Novel amplifier design techniques are presented for reducing dc power consumption in wireless PAN transceivers. A CMOS VGA cell is implemented by combining two independent gain control circuits to obtain 40dB and 50dB (dB-linear) gain ranges at 250µW and 1.75mW, respectively. A 260µW, 1GHz CMOS LNA is designed by using an unrestrained subthreshold bias technique to improve linearity. It has a measured gain of 13.6dB, a noise figure of 4.6dB and an IIP3 of 7.2dBm. An inductor-less RF VGA cell, based on a TA-TI pair, with 20dB gain range is also presented as an example of system level power optimization.