Patent ID: 8780512

Claim:
A low leakage electrostatic discharge (ESD) circuit for a capacitive bio-sensor comprising: a unity gain buffer; an ESD protection circuit connected to the unity gain buffer, wherein the ESD protection circuit comprises a first diode and a second diode connected across an input and an output of the unity gain buffer; and an electrode connected to the input of the unity gain buffer, wherein the electrode is a non-contact electroencephalography (EEG) sensor or a non-contact electrocardiography (ECG) sensor; wherein an anode of the first diode and a cathode of the second diode are directly connected to the electrode; wherein: a cathode of a third diode and an anode of a fourth diode being connected to a ground, and an anode of the third diode and a cathode of the fourth diode being directly connected to the output of the unity gain buffer; and wherein a voltage range for the ESD protection circuit is configurable.