Quadrature signal generation in an integrated direct conversion radio receiver
US6782249B1 · kind B1 · utility
5Cited by
5References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 22, 2000 |
| Grant date | Aug 24, 2004 |
| Priority date | — |
| Expiry date | Mar 22, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03B27/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A receiver for direct conversion of RF signals, a particular embodiment comprising a quadrature signal generation circuit having an oscillator with an oscillation frequency of ⅔ times that of the carrier frequency of the RF signal. For the particular embodiment, the quadrature generation circuit includes a divide-by-two division circuit to provide quadrature signals having a frequency of ⅓ that of the carrier frequency, and further including mixers and filters to mix the output of the oscillator and the output of the divide-by-two division circuit so as to provide quadrature signals at the carrier frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.