An Ultra-Low-Power Read-Out Circuit for Interfacing Novel Gas Sensors Matrices

Graphene-based chemiresistive gas sensors

“…For IoT applications this can quickly become an issue and along with sensors, also sensing circuits with low power demands need to be developed. Such a low-power integrated circuit for reading the responses of a simple PANI-based NH 3 sensor as well as a pristine graphene NO 2 sensor was shown to be able to interface with a resistance range from 1 kΩ to 33 MΩ and generate bias voltages from 50 mV to 1 V. 165 …”

Measurement of low‐loss aqueous solutions permittivity with high detection accuracy by a contact and free‐label resonance microwave sensor

“…Depending on the design algorithm, these methods are different. Different methods of design in the resonance style depend on whether the sample type is solid, 26–29 liquid, 30–37 or gas 38 . Gas sensors are able to detect their presence and type, and they are very useful in industries 39,40 .…”

“…Different methods of design in the resonance style depend on whether the sample type is solid, [26][27][28][29] liquid, [30][31][32][33][34][35][36][37] or gas. 38 Gas sensors are able to detect their presence and type, and they are very useful in industries. 39,40 The various methods used in the papers include rat race coupled, 41 parallel coupled, 42 phase variation, 43 near-field self-injection-locked and spiral bandgap, 44 GaAs monolithic microwave integrated circuit, 45 coplanar waveguide-fed wearable antenna, 46 ring loaded monopole antenna, 47 wireless networks, 48,49 and split-ring resonators (SRR).…”