Universal land mobile receiver IF system
US4727594A · kind A · utility
3Cited by
2References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 19, 1986 |
| Grant date | Feb 23, 1988 |
| Priority date | — |
| Expiry date | Sep 19, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D7/163
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An IF system that makes satisfactory use of a first IF stage frequency selected from between 108 MHz and 132 MHz to thereby provide an IF system that can be utilized in radios intended for reception in all land mobile frequency bands. The first IF stage (17) includes a high tolerance crystal filter (24) that contributes to the satisfactory reception performance of a radio so equipped.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.