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. 09, 1986
Filed:
Dec. 23, 1982
Duncan R McDonald, Mountain View, CA (US);
Fairchild Camera and Instrument Corporation, San Jose, CA (US);
Abstract
A high voltage analog solid state switch is disclosed which includes a pair of MOS FET's 10 and 20 having commonly coupled sources 11 and 21 and commonly coupled gates 13 and 23. A photovoltaic generator 30 and an opto-coupler 40 are connected in parallel between the commonly coupled gates and sources. The input node is connected to the drain of one transistor 10 while an output node is connected to the drain of the other transistor 20. The switch is turned on by application of light 32 to generator 30 to thereby positively bias the gates 13 and 23 and cause transistors 10 and 20 to conduct. The switch is turned off by application of light 42 to coupler 40 to thereby short the commonly coupled sources 11 and 21 to the commonly coupled gates 13 and 23.