Patent ID: 6711437
Filing Date: 2004-03-23
Classification: A61N

Abstract:
A cardiac pacing system comprising:a first lead; a first sense amplifier having inputs to be coupled to the first lead; a first blanking circuit coupled to the first sense amplifier to inhibit sensing of spontaneous cardiac depolarizations during a predetermined blanking interval; and a first pace output circuit having outputs to be coupled to the first lead; a second lead; a second sense amplifier having inputs to be coupled to the second lead; a second blanking circuit coupled to the second sense amplifier to inhibit sensing of spontaneous cardiac depolarizations during a predetermined blanking interval; and a second pace output circuit having outputs to be coupled to the second lead; and pacing timing and control logic coupled to the first and second sense amplifiers, the first and second pace output circuits, and the first and second blanking circuits; and a monolithic isolated current replicator coupled between one of the first and second leads and the respective one of the first and second sense amplifiers and comprising an output current loop coupled to the lead and an input current loop coupled to the sense amplifier.