Noise removing device and data communication apparatus using the same
US5684830A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 20, 1994 |
| Grant date | Nov 4, 1997 |
| Priority date | — |
| Expiry date | Oct 20, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The noise removing device is used in a data communication system utilizing a transmitting signal modulated by a data signal to be transmitted. The noise removing device includes a receiving section for receiving the transmitting signal, and converting it into an electric signal, so as to supply an input signal, an analog signal processing circuit for selectively passing the input signal in a first frequency range including a carrier frequency of the transmitting signal, thereby removing a first noise, for converting the passed signal into a digital signal, and for outputting the digital signal, and a digital signal processing circuit for sampling the digital signal, and for selectively passing the digital signal in a second frequency range including the carrier frequency based on a result of comparison of a pattern obtained by the sampling with a predetermined pattern, thereby removing a second noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.