Plural band scanning radio with direct switch of RF amplifying transistors
US4157505A · kind A · utility
7Cited by
6References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 13, 1977 |
| Grant date | Jun 5, 1979 |
| Priority date | — |
| Expiry date | Jun 13, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/28
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A signal-seeking radio receiver is disclosed which can be manually programmed to receive a number of different channels in any combination with three bands with a minimum of switching circuitry. The receiver has pre-IF circuitry which includes at least one PNP transistor associated with each band, the base terminal of each transistor being connectable to one output of a solid state counter for controlling the band of operation of the receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.