Title:
カレントミラー自己バイアス起動回路を備えた電力増幅器
Document Type and Number:
Japanese Patent JP2005501458
Kind Code:
A
Abstract:
A power amplifier circuit includes an amplifying transistor and a dc bias circuit for biasing the amplifier transistor to obtain a conduction angle of at least about 180°. The dc bias circuit includes a self-bias boosting circuit which has a cascode current-mirror circuit having an output coupled to a control terminal of the amplifying transistor by a resistor, and a capacitor coupled from the cascode current-mirror circuit to a common terminal. The value of the capacitor can be selected to obtain the desired amount of self-bias boosting.
Inventors:
Schiffen, Luo
Application Number:
JP2003524108A
Publication Date:
January 13, 2005
Filing Date:
August 02, 2002
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
H03F1/30; H03F3/21; (IPC1-7): H03F3/21; H03F1/30
Attorney, Agent or Firm:
Kenji Yoshitake
Hidetoshi Tachibana
Yasukazu Sato
Hiroshi Yoshimoto
Yasushi Kawasaki
Hidetoshi Tachibana
Yasukazu Sato
Hiroshi Yoshimoto
Yasushi Kawasaki