Electronic noses have potential applications in daily life, but are restricted by their bulky size
and high price. This review focuses on the use of chemiresistive gas sensors, metal-oxide …

Modern gas sensor technology is becoming an important part of our lives. It has been
applied within the home (monitoring CO levels from boilers), the workplace (eg, checking …

Sinusoidal oscillators and waveform generators have numerous applications in electronics,
instrumentation, measurement, communications, control systems, and signal processing …

In this study, a review of second-generation voltage conveyor (VCII) and current conveyor
(CCII) circuits for the conditioning of bio signals and sensors is presented. The CCII is the …

Water quality in rural areas is difficult to monitor due to lack of connectivity from different
water laboratories. In other areas, location-based real-time water quality data collection is a …

We present a low-power, low complexity, and wide-dynamic-range universal sensor readout
circuit that converts the sensing capacitance or resistance changes to digital duty cycles …

In this paper, we propose a novel current‐mode solution suitable for the square waveform
generation. The designed oscillator, which utilizes only two positive second‐generation …

This paper presents a fully analog auto-nulling bridge based capacitance-to-voltage (AN-
C2V) converter circuit for measuring the capacitive component of the leaky capacitive …

This paper presents a fast high-linearity low-power versatile interface circuit for MOX gas
sensor. The device is based on a resistance-to-frequency converter with digital output …

The monitoring phase has gained a fundamental role in the energy efficiency evaluation of a
system. Number and typology of the probes depend on the physical quantity to be …