Receiving mixer circuit for mobile radio transceiver designed to operate with multiple modulation modes and multiple frequency bands
US6006080A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1997 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Aug 8, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/406
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A receiving mixer device for a mobile radio transceiver which operates with multiple modulation modes and within multiple frequency bands. The receiving mixer includes a plurality of mixers each for converting a received radio frequency signal to an intermediate frequency, a common connection part to which output terminals of the mixers are connected in common, a plurality of impedance conversion circuits connected to the common connection part, and output terminals for the impedance conversion circuits. The number of mixers is equal to the number of frequency bands of the received radio frequency signal. The number of the intermediate frequencies is equal to the number of modulation modes of the received radio frequency signal. The number of the impedance conversion circuits is equal to the number of intermediate frequencies, and each of the impedance conversion circuits passes only a single predetermined frequency of the intermediate frequencies used by the device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.