Multiple-line superheterodyne transmission and reception device
US5201064A · kind A · utility
1Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 3, 1991 |
| Grant date | Apr 6, 1993 |
| Priority date | — |
| Expiry date | Jul 3, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03D7/163
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A transmitting and multiple line superheterodyne receiving device and transmitting device for the communications, particularly telecommunications field is disclosed. To suppress the modulation signal components otherwise generated by the transmitting device, a compensation device is provided which includes a frequency control circuit with a voltage controlled oscillator, whose nominal frequency corresponds to the sum or difference of the first and second intermediate frequencies and which is connected to a second receiving mixer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.