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:
Aug. 24, 2010
Filed:
Sep. 05, 2008
Hrvoje Jasa, Scarborough, ME (US);
Steven M. Macaluso, Scarborough, ME (US);
Julie Stultz, Scarborough, ME (US);
Roy L. Yarbrough, Hiram, ME (US);
Hrvoje Jasa, Scarborough, ME (US);
Steven M. Macaluso, Scarborough, ME (US);
Julie Stultz, Scarborough, ME (US);
Roy L. Yarbrough, Hiram, ME (US);
Fairchild Semiconductor Corporation, South Portland, ME (US);
Abstract
A circuit is described that when the power supply to circuits that control a pass transistor is at zero volts, the pass transistor configured as a voltage level translator remains off regardless of the voltages and changes in voltages at the ports connected to the pass transistor. Cross coupled transistors provide a mechanism where the higher of the port voltages is available to power circuitry that maintains the control input of the pass transistor in the off condition. The voltages at the ports may rise and fall relative to each other, but the control input of the pass transistor will keep the pass transistor off.