ALC circuit receiver with sensitivity switching for controlling
US6463268B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 1998 |
| Grant date | Oct 8, 2002 |
| Priority date | — |
| Expiry date | Apr 30, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/28
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A radio receiver of the is provided with a local oscillation circuit, a mixing circuit to perform a frequency conversion from a received signal into an intermediate frequency signal by using an oscillation signal generated by the oscillation circuit, an ALC circuit to detect a level of the oscillation signal and control the level of the oscillation signal at a specified value, and a switching circuit switch the operation of the ALC circuit from the operational state to the non-operational state and vice versa. The receiver thus constructed will not receive an influence from the image signal, and even when the receiver is used in an area where a strong interference wave is present, the receiver is able to operate the local oscillation circuit in a normal condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.