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:
Mar. 20, 2007
Filed:
Jan. 14, 2005
Moon-suk Jeon, Seoul, KR;
Sang Hwa Jung, Ansan, Kyunggi-Do, KR;
Junghyun Kim, Seoul, KR;
Other;
Abstract
Provided is a temperature-compensated bias circuit for a power amplifier, in which a first resistor (Rref) connected to a reference voltage is connected to a base terminal of a third transistor (Q) and an emitter terminal of the third transistor is connected to a first diode (D). The temperature-compensated bias circuit includes a second resistor (R) connected to the reference voltage, a third resistor (R) connected to the second resistor in series, a fourth resistor (Rc) having one terminal connected to the reference voltage, a fifth resistor (Re) having one terminal connected to ground, a bias transistor (Q) having a base terminal connected to a contact point (VS) between the second resistor and the third resistor, a collector terminal connected to the other terminal of the fourth resistor, and an emitter terminal connected to the other terminal of the fifth resistor, and a sixth resistor (Rf) connected between a collector terminal of the third transistor and a collector terminal of the bias transistor.