A 0.029 mm~2 8 Gbit/s Current-Mode AGC Amplifier with Reconfigurable Closed-Loop Control in 65 nm CMOS

摘要

A 8 Gbit/s current-mode automatic gain control (CMAGC) amplifier with a reconfigurability between an internal closed loop control (analog AGC) and external baseband feedback control (digital AGC) is introduced in this paper. By using the p-n diode in CMOS technology, this CMAGC achieves an exponential variable gain control and a logarithmic power detection with more than 24 dB dynamic range. The proposed CMAGC consumes a maximum 48 mW dc power from a 1.2 V supply voltage and the core design occupies only 0.029 mm~2 die area.