Patent ID: 11941961
Assignee: STMICROELECTRONICS S.R.L.
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. The detection device according to claim 1, further comprising the electrostatic-charge-variation sensor, wherein the electrostatic-charge-variation sensor comprises:
at least one electrode configured to be arranged facing the monitored area;
a high-impedance instrumentation amplifier having an input coupled to the electrode, the high-impedance instrumentation amplifier comprising
a resistor network,
a first amplifier having a first input coupled to the electrode and a second input coupled to the resistor network, and
a second amplifier having a first input coupled to a reference voltage node and a second input coupled to the resistor network; and

an analog-to-digital converter coupled to the resistor network of the high-impedance instrumentation amplifier for providing the charge-variation signal.