Sampling system

Abstract

A sampling system arranged such that a modulated signal received by an antenna and input via a low noise amplifier and a band-pass filter is sampled at a sampling frequency higher than the signal band of the modulated signal by a first sample and hold circuit and is input to an analog decimation filter to remove a frequency component which may turn out to be aliasing noise. The output of the analog decimation filter is sampled with a sampling frequency lower than the sampling frequency of the first sample and hold circuit by a second sample and hold circuit and is digitized by an A/D converter to be demodulated by a demodulator. The sampling system which can convert the modulated signal into a low frequency without using the highly precision mixer circuit or a filter having sharp characteristics may be provided by constructing as described above.

Dependencies are inferred from the claim text.