Patent ID: 8860518

Claim:
A current-feedback operational-amplifier based serial resistive/serial capacitive/capacitive—resistive sensor electronic interfacing circuit system, comprising: a first output terminal; a serial resistive/serial capacitive/capacitive-resistive sensor having a first terminal and a second terminal; a reference capacitor directly coupled between the first terminal of the serial resistive/serial capacitive/capacitive-resistive sensor and a ground; a current-feedback operational-amplifier based Schmitt trigger circuit including: a first input terminal directly coupled to the second terminal of the serial resistive/serial capacitive/capacitive-resistive sensor; a second output terminal directly coupled to the first output terminal of the serial resistive/serial capacitive/capacitive-resistive sensor; a current feedback operational amplifier having a second input terminal, a third input terminal, a third output terminal and a fourth output terminal, wherein the third output terminal directly coupled to the first output terminal of the current-feedback operational-amplifier based serial resistive/serial capacitive/capacitive-resistive sensor electronic interfacing circuit system, and the fourth output terminal directly coupled to the third input terminal; a first resistor directly coupled between the first input terminal and the second input terminal, and a second resistor directly coupled between the third input terminal and a ground.