Abstract
In this work, we design a pre-amplifier and a post-amplifier aiming at the requirements of wireless infrared communication system. The pre-amplifier is composed of a transimpedance amplifier that using C-peaking technology, low noise structure, and active feedback resistance to enhance input dynamic range, and linearity improvement. The pre-amplifier can meet the IrDA communication requirements. The gain is over 60dBΩ and the –3dB bandwidth is over 100MHz. A post-amplifier is added in the system to enlarge the input dynamic range. The feedback type auto-gain control (AGC) make the entire system much less sensitive to environment and process variation. Furthermore, it also reduces the low frequency noise. The output voltage signal swing is 1 volt peak-to-peak and the power consumption is about 22.34mW. The whole chip area is 1000 1000 um2, which is fabricated with TSMC 0.35um CMOS technology.