Transmitter and wireless communication apparatus using the transmitter
US7424276B2 · kind B2 · utility
3Cited by
11References
10Claims
0Family size
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Inventors
Key dates
| Filing date | Feb 18, 2003 |
| Grant date | Sep 9, 2008 |
| Priority date | — |
| Expiry date | Jul 4, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/0433
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a transmitter of polar-loop architecture having a phase control loop and an amplitude control loop, as loop filters for controlling a loop band of the amplitude control loop, a first filter with lag-lead characteristics (secondary or more filter including a capacitor and a resistor) and a second filter of a perfect integrator type (filter including only a capacitor) are employed, and current-output type circuits are connected to respective front stages of the first and second filters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.