A wide-band tuning system for fully integrated satellite receivers

摘要

The building blocks for a low-power tuning system that reduces thenphase noise of integrated VCO's are described. The multimodulusnprescaler, the phase frequency detector, and the wide-band charge pumpnhave been integrated in a standard bipolar technology with 9-GHz n-p-nntransistors and 200-MHz p-n-p transistors. The maximum input frequencynof the multimodulus prescaler is 3.2 GHz, the maximum referencenfrequency of the phase frequency detector is 380 MHz, and the 3-dBnbandwidth of the charge pump is 41 MHz at a reference frequency of 300nMHz. The achieved performance enables the use of fully integrated VCO'snwith relatively high phase noise for reception of satellite digitalnsignals