The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 20, 2003
Filed:
Jun. 04, 2001
Naoyuki Miyazawa, Nakakoma, JP;
Fujitsu Quantum Devices Limited, Yamanashi, JP;
Abstract
In the high frequency amplifier bias circuit, an emitter-follower-transistor, which serves to supply a bias electric current corresponding to a control input voltage input from outside, is connected to a base of the transistor for amplification. The transistor for current control is connected in series to emitter of the transistor for bias supply, and bypasses electric current corresponding to the control input voltage. Electric current corresponding to the control input voltage flows through the first transistor for temperature compensation. Electric current corresponding to electric current flowing through the first transistor for temperature compensation flows through the transistor for current control.