Patent ID: 8810262

Claim:
An integrated low-noise sensing circuit with efficient bias stabilization comprises: a first capacitance sensing element; a second capacitance sensing element being connected to the first capacitance sensing element; a sub-threshold transistor comprising a body; a gate forming on the body; a source forming on the body and being connected to the first capacitance sensing element and the second capacitance sensing element; a drain forming on the body and being connected to the gate of the sub-threshold transistor; a source-body junction diode comprising an anode being connected to the ground; and a cathode being connected to the first capacitance sensing element, the second capacitance sensing element and the source of the sub-threshold transistor; and a bulk; and an amplifier circuit comprising a gate being connected to the first capacitance sensing element, the second capacitance sensing element, the source of the sub-threshold transistor and the cathode of the source-body junction diode; a source; and a drain.