Monolithic front-end amplifier for portable laser rangefinder

A monolithic front-end amplifier for portable laser rangefinder was realized in 0.5 m CMOS technology, owing to attaining adequate performance and lower cost simultaneity. It consists of transimpedance pre-amplifier(TIPA), differential voltage post-amplifier(DVPA), band gap reference and other interface circuits. Attention has been paid to design the TIPA and DVPA, which are most appropriate for the laser rangefinder signal processing. The measurement results show that the chip achieves 87.27 dB transimpedance, 952.8 MHz bandwidth, 17.64 pA/Hz1/2 input referred noise current. The die area occupies 2.816 mm2 including pads and dissipates 106.9 mW power consumption with 75% from the output buffer.