• Journal of IKEEE
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• v.23 no.2
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• pp.636-641
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• 2019

A simple resistance deviation-to-time period converter is proposed for interfacing resistive half-bridge sensors. It consists of two 2nd generation current conveyors(CCIIs). The proposed converter has simpler circuit configuration than the conventional converters using operational amplifiers or operational transconductance amplifiers(OTAs). The proposed converter was simulated using CCII implemented with AD844 IC chips. The simulation results show that the converter has a conversion sensitivity of $0.01934ms/{\Omega}$ over a range of $100-500{\Omega}$ resistance deviations and a linearity error less than ${\pm}0.002%$.

• Journal of the Korean Institute of Telematics and Electronics
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• v.10 no.2
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• pp.7-15
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• 1973

The operation behaviors of negative-resistance multivibrators. are described. The oscillation phenomena in monostable and bistable mode negative-resistance circuits are analyzed by using a analog computer. It is presented that voltage-controlled negative -resistance switching circuits may be in oscillation state for a time or parmanently by adding the bias voltage or trigger pulse. The results show that the care must be taken for this fact in the constructions of negative resistance switching circuits.

• IEIE Transactions on Smart Processing and Computing
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• v.5 no.2
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• pp.71-76
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• 2016

A controller area network (CAN) receiver measures differential voltage on a bus to determine the bus level. Since 3.3V transceivers generate the same differential voltage as 5V transceivers (usually ${\geq}1.5V$), all transceivers on the bus (regardless of supply voltage) can decipher the message. In fact, the other transceivers cannot even determine or show that there is anything different about the differential voltage levels. A new CMOS RC oscillator insensitive supply voltage for clock generation in a CAN transceiver was fabricated and tested to compensate for this drawback in CAN communication. The system consists of a symmetrical circuit for voltage and current switches, two capacitors, two comparators, and an RS flip-flop. The operational principle is similar to a bistable multivibrator but the oscillation frequency can also be controlled via a bias current and reference voltage. The chip test experimental results show that oscillation frequency and power dissipation are 500 kHz and 5.48 mW, respectively at a supply voltage of 3.3 V. The chip, chip area is $0.021mm^2$, is fabricated with $0.18{\mu}m$ CMOS technology from SK hynix.