Title:
RADIO FREQUENCY POWER AMPLIFIER ACTIVE SELF-BIAS COMPENSATION CIRCUIT
Document Type and Number:
WIPO Patent Application WO2004049555
Kind Code:
A3
Abstract:
An active bias compensation circuit for use with a radio frequency ("RF") power amplifier, the RF amplifier having an input (112), an output (116), a first transistor (110), and a plurality of operating performance characteristics responsive to a quiescent operating point established by a bias current in the RF amplifier. The active bias compensation circuit includes: a second transistor (120) operatively coupled to the RF amplifier and having a first, second and third terminal and further configured to have essentially the same electrical and thermal characteristics as the first transistor; and a first circuit (130) coupled between the first and second terminal of the second transistor for causing a desired quiescent operating current to be set and maintained in said RF power amplifier, independent of factors such as temperature and process variation.
Inventors:
KRVAVAC ENVER
Application Number:
PCT/US2003/036277
Publication Date:
August 12, 2004
Filing Date:
November 10, 2003
Export Citation:
Assignee:
MOTOROLA INC (US)
International Classes:
H03F1/30; (IPC1-7): H03F3/04; H03F1/30
Foreign References:
| US6046642A | 2000-04-04 | |||
| US6515546B2 | 2003-02-04 | |||
| US6617928B2 | 2003-09-09 | |||
| US6424225B1 | 2002-07-23 | |||
| US5307023A | 1994-04-26 |
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