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:
Jan. 13, 2004
Filed:
May. 31, 2001
Michael W. Glasbrener, Santa Rosa, CA (US);
Edward Lawrence, Marion, IA (US);
Skyworks Solutions, Inc., Irvine, CA (US);
Abstract
A non-linear transistor circuit uses separate signal biasing and DC biasing to improve the power efficiency while preventing thermal runaway. An improved amplifier using this circuit has a DC bias voltage supply. Using separate biasing of the DC supply voltage and the signal allows a large value resistance for the DC bias network to prevent thermal runaway and a small value resistance for the signal biasing network to improve the circuit's efficiency. A point of thermal equilibrium is reached when the voltage drop across the DC bias resistance sufficiently reduces the voltage between the transistor's base and emitter, V , the base current, the collector current, and the junction temperature, resulting in thermal equilibrium.