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. 23, 2004
Filed:
Apr. 23, 2001
Roger S. Tsai, Torrance, CA (US);
Yaochung Chen, Rancho Palos Verdes, CA (US);
Northrop Grumman Corporation, Los Angeles, CA (US);
Abstract
A hybrid model formed from a semi-physical device model along with an accurate data-fitting model in order to implement a relatively accurate physical device model as a large signal microwave circuit computer-aided design (CAD) tool. The semi-physical device model enables accurate representation of known physical device characteristics and measured bias-dependent characteristics. This model is used to accurately simulate the effect of process variation and environmental changes on bias-dependent characteristics. The data-fitting model is used to model these characteristics with relatively good fidelity. The expressions of the model are constructed to be charge conservative. As such, the model is computationally robust within the harmonic balance algorithms employed by known large signal microwave circuit CAD tools.