Design of a high temperature signal conditioning ASIC for engine control systems - HIGHTECS

Stoica, Lucian; Solomko, Valentyn; Baumheinrich, T.; Regno, R. Del; Beigh, Reece; Riches, Steve; White, IH; Rickard, G; Williams, Paul

doi:10.1109/iscas.2014.6865585

Cited by 7 publications

(8 citation statements)

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“…With the exception of the ADC, all of the other HIGHTECS ASIC blocks have been custom designed during the project. The signal conditioning unit processing the high voltage frequency signal was integrated onto the HIGHTECS ASIC [6], [29], and requires only two pairs of external resistors and capacitors for signal conditioning and six external resistors for ESD protection. The block diagram of the frequency signal conditioning unit is presented in Fig.…”

Section: System Architecturementioning

confidence: 99%

“…The threshold current io, the mirror currents I Mirr1 , I Mirr2 , I Mirr3 and the bias currents of OP 1 and T S1 in Fig. 12 are generated by the bias block presented in [6]. The impact over pulse generation due to temperature and process variation of io, I Mirr1 , I Mirr2 and I Mirr3 is minimized by the high gain of the negative feedback network formed by OP 1, M 12 , and (R ext , C ext ).…”

Section: B Current Detect Pathmentioning

confidence: 99%

“…Reducing specific fuel consumption by reducing aircraft weight has become a major focus for research and development. The use of sensors developed to operate for long periods in high temperature environments allows sensors to be replaced close to the engine sensing and control units eliminating the need for complex heat sinks, special fuel pumping, and interfacing, which in turn assists with the goal of aircraft weight reduction [6]. Mounting the engine sensing and control unit close to the sensors means ambient temperatures may easily reach 200 • C. This requirement has posed a challenge to the bulk CMOS technologies which are typically qualified for operation between −55 • C and 125 • .…”

mentioning

confidence: 99%

“…The HIGHTECS design concept was to take the output from several on-engine sensors (temperature probe, thermocouple, strain gauges, frequency) and carry out the signal conditioning on the sensor signals, multiplexing, analogue to digital conversion, and transmission of the data through a serial data bus on a single ASIC (application specific integrated circuit) [6]. The unit was designed to meet the environmental requirements of DO-160 for a helicopter engine, with the specific needs of operation at 200 • C with a lifetime of 50 000 engine operating hours.…”

mentioning

confidence: 99%

“…The unit was designed to meet the environmental requirements of DO-160 for a helicopter engine, with the specific needs of operation at 200 • C with a lifetime of 50 000 engine operating hours. Due to the temperature and lifetime requirements, and the current feasibility of SOI technology over SiC, the HIGHTECS ASIC was fabricated as a custom CMOS SOI device to be assembled on a ceramic hybrid carrier [6], [27]. The hybrid was assembled in a stainless steel enclosure, mounted on an aeroengine during tests on the ground, and due to the shorter cables needed in between the sensors and the electronics, it helps reducing the weight of the aeroengine by several kilograms [28].…”

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confidence: 99%

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A High Temperature Frequency Signal Conditioning Unit for Aeronautical Rotating Systems

Stoica

Solomko

Baumheinrich

et al. 2016

IEEE Trans. Circuits Syst. I

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This paper covers the development and testing of a high temperature signal conditioning unit capable of sensing wide dynamic range signals from rotating sensors. The unit includes a current peak detector block, a digital pulse generator, ESD (electrostatic discharge) protection and generates an output current proportional to the peak value of the applied input signal. The digital data from the unit can be directly utilized by the FADEC (Full Authority Digital Electronic Control) system or the EHMS (Engine Health Monitoring System) on an aeroengine. The mixed signal unit presented in this paper was designed and fabricated on 1 μm silicon-on-insulator (SOI) CMOS (complementary metal oxide semiconductor) technology and has been shown to function up to 235 • Celsius with very high linearity of the output signal. This is the highest operating temperature of an integrated signal conditioning unit developed for a civil aircraft. The mixed signal unit was mounted on a high temperature hybrid module and helps reducing the weight of the aeroengine by several kilograms.Index Terms-Aeronautical rotating systems, CMOS SOI, high temperature electronics, peak detector.

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Section: System Architecturementioning

confidence: 99%

Section: B Current Detect Pathmentioning

confidence: 99%

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confidence: 99%

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confidence: 99%

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