Impedance Bootstrap Circuit for an Interface of a Monitoring Device

摘要

An interface for receiving electrical signals representative of a condition of a patient and for conveying representations of the electrical signals to a processing system. The interface includes at least one amplifier circuit configured to alter an amplitude of the electrical signal, a common-mode cancellation amplifier circuit coupled to the at least one amplifier circuit and configured to reduce common-mode signal noise in the electrical signals, and a bootstrap circuit coupled to the at least one amplifier circuit and configured to increase an effective input impedance at an input of the at least one amplifier circuit.

主权项

1. An interface being connectable between a processing system and a sensor being attachable to a patient, said interface comprising:
a circuit being configured to detect an error condition comprising at least one of (1) the sensor being disconnected from said interface and (2) the sensor being detached from the patient; and wherein said circuit is configured to actively provide a feedback condition recognizable by the processing system in response to detecting that said error condition is present such that the processing system generates an indication being informative of said error condition.