Procedure for forming frequencies of a digital radio telephone
US5291474A · kind A · utility
30Cited by
16References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1992 |
| Grant date | Mar 1, 1994 |
| Priority date | — |
| Expiry date | Apr 27, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/405
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A procedure is utilized for forming the transmission and reception frequencies required for the operation of a digital radio telephone based on time division multiplex access, in particular, in a radio telephone for the GSM system. According to the procedure, the mixer frequencies used in the transmitter and the receiver of the radio telephone are formed by a synthesizer and a basic oscillator commmon to both the receiver and transmitter. The clock frequency for the logic of the radio telephone and the RF reference frequency to the synthesizer are produced by dividing the output frequency of the common basic oscillator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.