Block Diagram of ECG

_______ provide baseline stability so that recorded signal will not drift.

• Preamplifier

• Baseline restoration

• Lead selector

• Driver amplifier

_______ detect unconnected lead or dry electrodes.

• Lead selector

• Preamplifier

• Lead fail detector

• Sensing electrodes

_______ prevents high voltage at the sensng electrodes from damaging the ECG unit.

• Protection circuit

• Auto calibration

• Isolation circuit

• Driven right leg circuit

_______ calibrate the preamplifier and the recorder with a known pulse.

• Isolated power supply

• Driver amplifier

• Analog to Digital Converter

• Auto calibration

_______ provides the initial amplification of raw ECG signal.

• Driver amplifier

• Protection circuit

• Preamplifier

• Microcomputer

_______ determines which pair of electrodes to configure to give the specific lead.

• Lead selector

• Sensing electrodes

• Isolation circuit

• Memory

_______ pick up ECG signals from the body.

• Lead selector

• Sensing electrodes

• Driver amplifier

• Preamplifier

_______ further amplifies the ECG recording before it is send to recorder printer.

• Preamplier

• Isolation circuit

• Baseline restoration

• Driver amplifier

_______ stores digitized patient ECG signals and information.

• Microcomputer

• Recorder printer

• Memory

• Analog to Digital Converter

_______ controls the various functions of the machine.

• Microcomputer

• Recorder printer

• Memory

• Analog to Digital Converter