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. 22, 1997
Filed:
Dec. 22, 1995
Pascal Pons, Crolles, FR;
Renzo Dal Molin, Chatillon, FR;
Ela Medical S.A., Montrouge, FR;
Abstract
An active implantable medical device, particularly a cardiac pacemaker or defibrillator, having a protection circuit that is effective against electromagnetic perturbations of external origin. The active implantable device is characterized in that at least all active components of the protection circuit (58, 60, 94, 98) are integrated components in a monolithically integrated microchip (16) including a control signal and circuits to commute selectively signals collected by external electrodes to the device for processing. In particular, the commutation circuits comprise static switches (24, 24', 28, 28', 38, 38', 40, 40', 44, 44', 46, 46', 50, 50', 54), and the control signal is a control voltage (VSUB, VCC) that is greater than the voltage (VPILE) of the battery of the device. The device delivers control logic signals (VDD, VSS) that are less than the battery voltage, and the protection circuit includes a voltage translator circuit (58) to raise, in absolute value, the logic control signal level to a value compatible with the static switches, control voltages and greater than the nominal level of parasitic voltages resulting from electromagnetic perturbations that are susceptible to appear on the static switch connection.