An illustrative embodiment includes an implantable cardiac stimulus device comprising input circuitry configured to reduce the time required to return to small signal operation after a disturbance of small signal operation. In another illustrative embodiment, the present invention includes methods for...http://www.google.de/patents/US7623916?utm_source=gb-gplus-sharePatent US7623916 - Implantable cardiac stimulus devices and methods with input recharge circuitry
