Radio receiver with bandwidth switching
US4356567A · kind A · utility
35Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1978 |
| Grant date | Oct 26, 1982 |
| Priority date | — |
| Expiry date | Jun 28, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/1054
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An automatic IF amplifier band width switching circuit is provided in which band width is switched from broad to narrow in response to either high frequency noise or a predetermined magnitude of interference voltage when the FM detection output is at zero volts. The switching signal may be combined with a hum signal from the tuning knob so that only switching in one direction is possible after tuning is complete.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.