Synthesized selective call receiver having variable characteristics
US5058204A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1990 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Jul 13, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J5/0281
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A paging receiver has a synthesizer for governing the receive frequency. The paging receiving further has characteristics which are varied in response to the receive frequency. These characteristics include varying the bandwidth of a loop filter within a phase lock loop within the synthesizer as well as varying the time in which a detector circuit used to extract a DC level from a recovered audio signal is disabled. Furthermore, the bandwidth of the loop filter is varied in response to switching from a first receive frequency to a second receive frequency in order to provide for either a uniform frequency lock time or for a rapid frequency lock time. Furthermore, the time in which the detector circuit is disabled is correspondingly changed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.