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Design of Voltage Comparators Based on the Elements of the Radiation-Hardened Low-Temperature BiJFET Array Chip MH2XA030  

Authors
 Dvornikov O.V.
 Tchekhovski V.A.
 Diatlov V.L.
 Prokopenko N.N.
 Budyakov P.S.
Date of publication
 2018
DOI
 10.31114/2078-7707-2018-4-10-16

Abstract
 Brief information about the new array chip (AC) MH2XA030 intended for accelerated creation of analog integrated circuits (ICs), which retain their performance under the influence of penetrating radiation and extremely low temperatures (up to minus 1970Ρ) is presented. The tools of circuit design of low temperature ICs based on LTSpice CAD and built-in standard models of field-effect and bipolar transistors are considered. The dependences of the base current gain of n-p-n transistors of AC on the emitter current at different temperatures and neutron fluxes are shown. Recommendations on the circuit design of radiation-hardened and low-temperature ICs based on the AC are developed. The layout of the macrocells of the voltage comparator (VC), which is part of the AC structure, is shown. The features of circuit design of VC are considered, its electrical circuit is shown, which includes measures for eliminating the saturation of transistors, reducing power consumption and signal delay, improving the temperature stability of the stage of the level shift of DC voltage. The results of simulation of transient processes in VC are provided, which provides: the delay time at switching-on is 8.74 ns / 4.41 ns / 4.12 ns (for exceeding the threshold by 10 mV / 100 mV / 1 V) and at shutdown - 2, 53 ns / 4.34 ns / 9.61 ns (for exceeding the threshold by 10 mV / 100 mV / 1 V), the maximum output current is 3.55 mA, the input current is 0.37 μA. The supply voltage of the VC is ± 5 V, the current consumption is 1.69 mA.
The microcircuit of the AC MH2XA030 is recommended for solving problems of space instrument engineering and high-energy physics.
Keywords
 analog integrated circuits, array chip, radiation hardness, cryogenic electronics, voltage comparator
Library reference
 Dvornikov O.V., Tchekhovski V.A., Diatlov V.L., Prokopenko N.N., Budyakov P.S. Design of Voltage Comparators Based on the Elements of the Radiation-Hardened Low-Temperature BiJFET Array Chip MH2XA030 // Problems of Perspective Micro- and Nanoelectronic Systems Development - 2018. Issue 4. P. 10-16.
URL of paper
 http://www.mes-conference.ru/data/year2018/pdf/D047.pdf

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