High frequency power amplifier module and wireless communication apparatus
US6900694B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2004 |
| Grant date | May 31, 2005 |
| Priority date | — |
| Expiry date | Mar 15, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G2201/40
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The number of components of a high frequency power amplifier is reduced. A bias resistance ratio is adjusted in accordance with a change in the threshold voltage Vth of a transistor. A high frequency power amplifier has a plurality of amplifying systems. Each of these systems has an input terminal to which a signal to be amplified is supplied, an output terminal, a bias terminal, a plurality of amplifying stages which are sequentially cascaded between the input and output terminals, and a bias circuit connected to the bias terminal and each of the amplifying stages to apply a bias potential to the amplifying stage. The amplifying stage includes a control terminal for receiving an input signal and the bias potential supplied to the stage and a first terminal for transmitting an output signal of the stage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.