Apparatus for detecting a signaling channel during scanning including a controlled frequency converter circuit and a controlled filter bandwidth, and a method therefor
US5511235A · kind A · utility
32Cited by
7References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 1994 |
| Grant date | Apr 23, 1996 |
| Priority date | — |
| Expiry date | May 2, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J3/08
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A receiver has a channel scan mode of operation and a communication mode of operation. In the channel mode of operation, the passband of a filter is narrowed relative to the passband of the filter in the communication mode. According to another aspect of the circuit, a local oscillator is selectively phase locked to an internal clock during channel scanning and locked to the incoming signal during a communication mode operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.