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:
Apr. 30, 1991
Filed:
Jan. 25, 1990
Applicant:
Inventors:
Assignee:
Thomson Composants Microondes, Puteaux, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
2502 / ; 250551 ;
Abstract
Disclosed is a microwave (1 GHZ) sample-and-hold unit having a field-effect transistor, to which an input signal is applied, and a storage capacitor. The transistor is made of materials of the III-V group, such as GaAs or InP, and Its channel region is controlled by an optical control device formed by an optic fiber and a pulsed laser semiconductor. In order to reduce the switching time of the transistor, this transistor and the laser are both biased at points close to their thresholds. The disclosed device can be applied in signal processing, at frequencies of the order of 1 GHz.