Radio receiver employing premixing and digital display
US4163943A · kind A · utility
6Cited by
11References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1977 |
| Grant date | Aug 7, 1979 |
| Priority date | — |
| Expiry date | Jun 7, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03J1/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A short wave broadcasting receiver which can receive accurately and stably the desired station is formed with a local oscillator which comprises a variable frequency oscillator, reference frequency oscillators, premixers and band pass filters, frequency converter and an 1F amplifier. By adding a frequency counter unit comprising a frequency counter block and digital display block, the received frequency can be digitally displayed stably and correctly by using a cheap low speed frequency counter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.