Receiving apparatus
US5175883A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 20, 1990 |
| Grant date | Dec 29, 1992 |
| Priority date | — |
| Expiry date | Feb 20, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/16
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A receiving apparatus according to the present invention comprises a high frequency amplifying circuit for amplifying a signal received from an antenna by a gain in accordance with a control signal, a frequency conversion circuit for converting the output frequency of the high frequency amplifying circuit, a narrow band filter for selectively passing therethrough the intermediate frequency signal components of the output of the frequency conversion circuit, and control signal generating circuit for generating a control signal in accordance with the output level of the frequency conversion circuit. The control signal generating circuit is so constructed that the control signal generating circuit outputs the control signal only when the output signal level of the frequency conversion circuit is higher than a level in accordance with the level of the narrow band filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.