Intermediate frequency receiver apparatus
US5612971A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 1, 1994 |
| Grant date | Mar 18, 1997 |
| Priority date | — |
| Expiry date | Jun 1, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D7/18
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transmitting and receiving system having two or more radios, each capable of transmitting and receiving a transmission signal on two or more radio frequencies where a first radio transmits on a selected frequency at a predetermined time interval and a second radio recovers the transmitted signal. The second radio has a first intermediate frequency generator which generates an intermediate frequency signal which is substantially equal to an integer multiple of the channel spacing whereby an image response corresponding to the selected frequency is separated by twice the intermediate frequency signal from the selected frequency. Thus, locations for the two or more transmission frequencies can be selected so as not to be located on the image responses corresponding to any and all of the two or more transmission frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.