Broad-band low-noise preamplifier design with GaAs MESFETs for optical communication systems

Abstract

Classical designs of transimpedance preampl8ers for optical receivers circuits use common-emitter (C-E) or common-source (C-S) input stages. The use of current-mode techniques to design photoreceivers for optical communication systems has been shown to offer signiJcant bandwidth advantages over traditional voltage-mode designs [IO]. In this papeq we focus on the design of a wkieband, low-noise photoreceiver in GaAs using current-based amplibing techniques. A 3 dB bandwidth exceeding 3.5 GHz and, 48 dB of gain, along with I2pA/mzinput noise have been simulated with a