Patent ID: 11867657
Assignee: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGY
Field: Measurement (Instruments)
Classification: CPC G  Y | IPC G

Claim 13:
14. A gas detection system for determining a concentration of a gas, the system comprising:
a first transistor having a gate electrically connected to a drain;
a second transistor (T1) having a gate connected to a variable power source; and
an inverter connected to a source of the first transistor and to a drain of the second transistor (T1),
wherein the first transistor includes an indium (In) gallium (Ga) zinc (Zn) oxide (O) (IGZO) thin-film, which is exposed to an ambient,
wherein the second transistor includes a corresponding IGZO thin-film, which is encapsulated to not be exposed to the ambient, and
wherein for each applied voltage VGS at the gate of the second transistor T1, the inverter receives a voltage due to a sensing current generated by the first transistor and a reference current generated by the second transistor, and generates a digital value indicative of the concentration of the gas.