Metal organic molecular beam epitaxy (MOMBE) was successfully used for the first time to realise a high speed monolithic photoreceiver. Incorporating an InGaAs pin photodetector followed by a transimpedance preamplifier circuit implemented with InP/InGaAs heterojunction bipolar transistors (HBTs), the OEIC photoreceiver had a bandwidth of 6 GHz and a midband transimpedance of 350-OMEGA. In a system experiment performed at 10 Gbit/s, the receiver exhibited a sensitivity of - 15.5 dBm for a bit error rate of 10(-9) at a wavelength of 1.53-mu-m. This is the first demonstration of operation of a long wavelength OEIC photoreceiver at this speed.