Bias circuit and radio communication apparatus using same

Details Bias circuit and radio communication apparatus using same Bias circuit and radio communication apparatus using same

2005-03-29

2005-03-29

Urban, Edward F. (Department: 2685)

Telecommunications

Transmitter

Power control, power supply, or bias voltage supply

C455S115100, C455S127300, C327S563000, C330S261000, C330S296000

Reexamination Certificate

active

06873830

ABSTRACT:
A bias circuit according to the present invention includes a monitoring circuit having a second FET and a resistance connected to a drain of the second FET for monitoring a drain current of a first FET to be supplied with a gate bias; a differential circuit including a third FET having a gate supplied with a reference voltage, a fourth FET having a gate connected to the drain of the second FET, sources of the third FET and the fourth FET being connected to a common point, and resistances connected to drains of the third FET and the fourth FET, respectively; and a fifth FET having a drain connected to the common source of the third FET and the fourth FET; wherein a drain voltage of the third FET is fed back to gates of the first FET and the second FET, and a drain voltage of the fourth FET is fed back to a gate of the fifth FET.

REFERENCES:
patent: 3733551 (1973-05-01), Augenblick et al.
patent: 4881044 (1989-11-01), Kinoshita et al.
patent: 5221909 (1993-06-01), Cole
patent: 5239275 (1993-08-01), Leitch
patent: 5280199 (1994-01-01), Itakura
patent: 5287070 (1994-02-01), Thelen et al.
patent: 5530395 (1996-06-01), Ting
patent: 5999050 (1999-12-01), Baltus
patent: 6084471 (2000-07-01), Ruth et al.
patent: 6124761 (2000-09-01), Robinson et al.
patent: 6137350 (2000-10-01), Maeda
patent: 6259901 (2001-07-01), Shinomiya et al.
patent: 6300811 (2001-10-01), Dick
patent: 6711391 (2004-03-01), Walker et al.

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