Method and apparatus for wireless phone transmit power amplification with reduced power consumption
US6313698A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 1999 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Sep 24, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2001/045
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for RF amplification of a transmit signal within a wireless phone. The amplifier chain is composed of three parts, a pre-driver, a bypassable driver amp, and a power amp. The configuration of the amplifier chain is adjusted in real time to optimize power consumption for a given output power requirement. At low output power levels the driver amp is bypassed and the power amp is provided a low bias current. At medium output power levels the driver amp is bypassed and the power amp is biased at a moderate current. When high output power is required the driver amp is utilized and the power amp is provided a high bias current. The driver amp is shut down when in the bypassed state. The result of implementing this amplifier configuration is an increase in the efficiency of the transmit amplifier. The increase in amplifier efficiency results in increased talk times for battery powered wireless phones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.