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. 13, 2007
Filed:
Nov. 15, 2004
Diane Dai, Santa Rosa, CA (US);
Diane Dai, Santa Rosa, CA (US);
Verigy Pte. Ltd., Singapore, SG;
Abstract
In one embodiment, ground separation is provided between first and second grounded environments by configuring first and second op-amps of the second grounded environment as buffers, configuring a third op-amp of the second grounded environment to output a difference of its inputs, and coupling the inputs of the third op-amp to outputs of the first and second op-amps. A signal sensing input of each of the first and second op-amps is biased by 1) coupling the signal sensing input to a respective one of first and second impedances, and 2) coupling the first and second impedances to a ground of the first grounded environment. A signal from the first grounded environment is then provided to the signal sensing input of the first op-amp. Related apparatus is also disclosed.