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:
Sep. 15, 1998
Filed:
Apr. 01, 1997
Dean B Nicholson, Windsor, CA (US);
Eric R Ehlers, Santa Rosa, CA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
The present invention relates to GaAs FET switches for use in microwave test equipment. For many microwave applications, particularly GSM (Global System for Mobile Telecommunications) basestation testing, accurate, reliable switching of microwave signals is desirable. GaAs FET switches are widely used to switch microwave signals in many applications because of their small size and high reliability. However, GaAs FET switches have a significant drawback called the 'slow tail' effect. This effect causes the final amplitude of the microwave signal to only be reached gradually after a 10 to 20 millisecond interval. The present invention integrates high intensity LEDs above GaAs IC switches to decrease the absolute magnitude of the slow tail effect, and to shorten its length for faster, more accurate switching.