Title:
バイアス電流供給回路及び増幅回路
Document Type and Number:
Japanese Patent JP4088177
Kind Code:
B2
Abstract:
A bias current supply circuit according to an embodiment of the invention includes a first transistor and a second transistor which form two emitter followers cooperating to supply a base bias current of a bipolar transistor for signal amplification, a normal temperature characteristic circuit which has normal temperature characteristics increasing an amount of current supply with increasing temperature and supplies a base current to the first bipolar transistor, and a reverse temperature characteristic circuit which has reverse temperature characteristics decreasing the amount of current supply with increasing temperature and supplies a base current to the second bipolar transistor.
Inventors:
Kuriyama Yasuhiko
Application Number:
JP2003066733A
Publication Date:
May 21, 2008
Filing Date:
March 12, 2003
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
H03F1/30; H03F1/02; H03F3/19; H03F3/50
Domestic Patent References:
| JP2000252766A | ||||
| JP2000077950A | ||||
| JP5241672A |
Attorney, Agent or Firm:
Kenji Yoshitake
Hidetoshi Tachibana
Yasukazu Sato
Hiroshi Yoshimoto
Yasushi Kawasaki
Takahashi
Hidetoshi Tachibana
Yasukazu Sato
Hiroshi Yoshimoto
Yasushi Kawasaki
Takahashi