High frequency power amplifier system and wireless communication system
US6329879A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 10, 1999 |
| Grant date | Dec 11, 2001 |
| Priority date | — |
| Expiry date | Nov 10, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/3025
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Disclosed herein is a high frequency power amplifier system having a transistor comprised of a first electrode, a second electrode and a control electrode and for controlling current which flows between the first electrode and the second electrode by applying a potential to the control electrode, and a resistance type potential divider circuit for determining a dc bias potential applied to the control electrode of the transistor, and wherein an input signal is inputted to the control electrode, an output signal is outputted from the first electrode and a control signal is inputted to the resistance type potential divider circuit. One resistor of the resistance type potential divider circuit is comprised of a temperature compensating resistor whose resistance value varies linearly, so that a temperature characteristic of an idle current defined as an output when the control signal is not inputted, assumes a negative temperature characteristic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.