Sampling system
US6181740A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 1997 |
| Grant date | Jan 30, 2001 |
| Priority date | — |
| Expiry date | Nov 18, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/47
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.