CURRENT-MODE APPROACH FOR WIDE-GAIN BANDWIDTH PRODUCT ARCHITECTURE

This paper describes the architectures of a fully differential input/s ingle-ended output wide-band high-gain current-mode comparator and amp lifier. Both architectures employ a current conveyor as the primary me ans of current-mode operation. The proposed comparator circuit deliver s extremely high gain and wide bandwidth by employing cascode compleme ntary gain stages and feedforward compensation techniques, respectivel y. The closed-loop voltage amplifier, using the proposed current-mode techniques, can improve upon the gain-bandwidth product when compared to conventional voltage-mode techniques. Computer simulation results s how 135 dB of gain and 100-MHz bandwidth for such an amplifier.