A wide band, high resolution, versatile spectrometer proposed for FIRST-HIFI

摘要

We present a versatile digital autocorrelation spectrometer designed to suit the needs of HIFI, the sub-millimetre heterodyne instrument of the ESA's FIRST satellite. This spectrometer will offer a set of three observation modes with different "on-line resolution/total band-width" combinations (82kHz / 500MHz, 163kHz / 1 HGz and 325 KHz / 2 GHz). An original architecture based on mixed Gallium Arsenide and Silicont echnologies, allowed us to realize a 1024 channel, low power consumption and high speed correlation module: 4mW per channel at 550 MHz clock frequency.