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:
Jul. 24, 2001
Filed:
Sep. 08, 1999
Peter I. Granchukoff, El Dorado Hills, CA (US);
EndoSonics Corporation, Rancho Cordova, CA (US);
Abstract
An electrical device such as a pressure guide wire (,) which has a resistive pressure sensor, such as a piezoresistive sensor (,), uses a precision interconnect in order to provide proper pressure measurement readings. The precision interconnect helps avoid the effects of contact and line resistance on the measurement of the pressure sensor's resistors (,and,). The precision interconnect uses high input impedance device's such as differential operational amplifiers (,) in order to overcome the effect of any changes in the contact resistance. Further, an interface switch (,) which is responsive to a control signal (,) automatically determines what type of pressure guide wire (,or,) is attached to the interface circuit (,).