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Although it has been demonstrated that the SiGe HBTs can achieve faster unloaded circuit speed at cryogenic temperature than at room temperature, modelling of the SiGe HBTs at low temperature has been limited. It is known that the standard SPICE models of bipolar transistor are effective and guarantee the valid results only up to a temperature of minus 100°C. Therefore, in this paper an accurate and...
In this paper the possibilities of passive magnetophotonic nanostructures application in low-temperature conditions of Arctic and Antarctic regions, near cosmic space and physics of high energies conditions are considered. Carried out examinations have shown that, in dependence on used magnetic materials, their crystallo-graphic structure, topology of arrangement (1D or 2D), technology of using, concentration...
The application features of digital potentiometers as controlled elements for the tasks of setting active RC-filters in the structure of communication systems analog interface and automatic control are considered. The research paper is based on a selected method of parameters for setting circuits with digital potentiometers providing necessary precision and setting ranges. The sections contain examples...
The article suggests a method of RC-correction of the four-arm bridge with the high speed and super high speed sensors, which has parasitic capacitances across the diagonally opposite pair of junctions, derived from the leads and the input capacitances of the differential amplifier and also the self-capacitances of the sensors. To reduce the transient time at the sensor parameter changes the special...
The article considers multichannel integrated circuits (ICs) MH2XA010-02/03, which are realized on the radiation-hardened structured array (SA) MH2XA010 and designed for analog signal processing of optoelectronic sensors. It gives the electric circuits of ICs, the description of their functionality features and the measurement results of their main parameters.
The mathematical basics of the non-classical approach to the logical synthesis of k-valued digital structures based on the replacement of the classic mathematical apparatus of logic synthesis (Boolean algebra) to the proposed mathematical apparatus — linear algebra are considered. The logic synthesis process of two valued and multi-valued digital structures in linear algebra including the formation...
The article gives the circuit design results of the of radia-tion-hardened charge-sensitive amplifier (CSA) MH2XA010-04, intended for the capacitance sensor signal processing. The main equations for optimal design of CSA are given, taking into account a new circuit (2016) of structured array MH2XA010. The variants of construction of multichannel CSAs for the tasks of tool engineering based on the...
The article considers the advanced two-stage architectures of the differential op-amps and differential difference operational amplifiers, realized on the base BiJFet of array chips AGAMC1.3, AGAMC2.1 (OJSC “Integral”, Minsk). The suggested circuits provide the higher voltage gain (more than 90…100 dB), and also the low offset voltage (less than 100 µV) over the temperature range −80°C – +80°C, the...
The paper presents approaches to electro-dynamic characteristics estimation for artificial composite media, among which a periodic random media are especially distinguished. Resonant circuit implementation based on thin-film ferromagnetic nanostructures is possible in a periodic composite media. Chiral media, photonic, magnonic crystals and layered structures are of particular interest. Approaches...
In this paper the available ferromagnetic materials, both the ones that are still under investigation and the ones that are applied in radioelectronics, including nanomagnetics, were analyzed. This analysis allows us to give an estimation of global trends in evolution of ferromagnetic usage in the new generation of SHF (microwave) and EHF devices. The paper accentuates the thin-film ferromagnetic...
In the paper composite media based on chiral elements with various periodic inclusions are considered. These media are artificial crystals, in which structural resonances are observed. Under certain conditions particles of these crystals have resonance-frequency behavior, manifesting in a rapid change of media parameters at certain frequency ranges. Composite media based on resonant particles, into...
From positions of spin electronics is observed the problems of raising of operation speed of elements distributed thin-film ferrostructures at external magnetic fields influence. Possibilities of logical schemes implementation for computers and communication systems on base resonant nonlinear parametrical zonal systems of microwave and THz-range on current ultraharmonics working in highest zones electromagnetic...
It was established, that time of transient processes in nonlinear parametrical zonal systems (NPS), working on current ultraharmonics in highest zones of oscillations instability, is shortening considerably, and aimed to zero for account of abrupt phase transition. It allows increasing fast-acting of devices on NPS base in 100–1000 times, even applying traditional ferromagnetic materials. For thin-film...
The solution of “cutoff problem” of solitary inductor is proposed in the note. The meaning is that inductor's force lines are artificially loaded at special conducting (or semi-conducting) microfilm, which either abuts on to inductor or is inside the last. The model of calculation of inserted cylindrical microfilm's integral inductance is adduced here.
The method for calculation solitary inductance with high symmetry, carried out for SHF devices as conducting planar strip, where homogeneous current pinch exists, has been proposed. The method permits: to calculate one-dimensional distributions of vector potential and magnetic field's induction, which are formed by current pinch inside and outside of conducting strip; to compute fluxes of magnetic...
The paper considers the advanced principle of construction of high quality low-bandwidth CMOS selective amplifiers (SAs) with low sensitiveness to unsettling influences of HF and microwave ranges. The suggested solutions provide cascading of several SAs without decoupling capacitors and additional DC level shifters. The considered SAs are characterized by the opportunity to choose the resistances...
The paper reviews the use of the inherent compensation principle for increasing the super capacitances precision (of D-elements) in the ladder filters structures. The task of the low-sensitive D-elements synthesis with cancellation circuits of the unity gain frequency effect of op amp on the pole frequency is solved. The expediency of the use of the differential difference operational amplifiers (DDAs)...
The analytic method for calculation of inductance and magnetic characteristics of conducting ring with finite radial width has been proposed. The method permits: 1) to calculate the radial distribution of magnetic fields, being formed in the internal space of the ring by the direct current; 2) to evaluate the value of magnetic flux, intersecting the internal surface of the ring; 3) to calculate the...
The analytic method for calculation of inductance and magnetic characteristics of infinitely long circular and tubular conductors has been proposed. The method permits: 1) to calculate radial distribution of vector potential and induction of magnetic fields, being formed by direct current in the internal and external areas of conductor; 2) to determine the value of magnetic flux in the internal and...
The non-classical (linear) approach to the logic synthesis of k-valued elements of computer engineering is considered. The method and fundamental principles of building of the circuitry basis, different from traditional ones, are described. The new circuit solutions of k-valued logical gates are suggested.
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