The design of radiation-hardened circuits the use of special technologies and the use of additional circuit techniques. The efficiency of using these methods to improve the scheme qualitative indicators can be assessed by some evaluation. The paper presents the efficiency evaluation method of special voltage feedbacks application in dynamic loads of the classical differential stages. The stages with dynamic loads are apply, for example, in the schemes of differential and multidifferential operational amplifiers. The purpose of the introduction of these feedbacks is the reducing of the effect of transistors low-signal parameters instability under the influence of destabilizing factors (radiation and temperature). For the organization of feedback circuits in the structure of dynamic loads, additional voltage amplifiers based on transistors are introduced into the circuit. It is shown that this approach can increase the output resistance of the dynamic load and increase the gain coefficient of the differential stage under the influence of ionizing radiation and temperature. The efficiency evaluation method is based on the construction of a mathematical model of the scheme expressed through low-signal differential h-parameters of scheme transistors. Thus, the calculation of the main qualitative indicators of the scheme can be carried out by mathematical modeling. The obtained simulation results confirm the efficiency of the proposed circuit design.
Keywords: efficiency evaluation, circuit design, dynamic load, low-signal parameters, radiation
This paper presents a radiation hardened by design of differential stages using dynamic loads. The efficiency of proposed design methods to improve the scheme qualitative indicators can be assessed by some evaluation. The theoretical results of the evaluation of the self-compensation circuit effect of parasitic impedance of the output transistor closed collector in the dynamic loads of classical differential stages, which is realized on the base of current feedbacks, are presented. It is shown that the introduction of the current feedbacks allows to reduce the effect of transistors small-signal parameters instabilities of the dynamic load under the influence of ionizing radiation and temperature on it's quality and the parameters of the differential stages. The efficiency evaluation of the circuit solutions in differential stages of modern operational and multidifferential amplifiers is given. The theoretical results of the evaluation of the self-compensation circuit effect of parasitic impedance of the output transistor closed collector in the dynamic loads of classical differential stages, which is realized on the base of current feedbacks, are presented. It is shown that the introduction of the current feedbacks allows to reduce the effect of transistors small-signal parameters instabilities of the dynamic load under the influence of ionizing radiation and temperature on it's quality and the parameters of the differential stages. For the organization of feedback circuits in the structure of dynamic loads, additional current amplifiers based on transistors are introduced into the circuit. It is shown that this approach can increase the output resistance of the dynamic load and increase the gain coefficient of the differential stage under the influence of ionizing radiation and temperature. The efficiency evaluation of the circuit solutions in differential stages of modern operational and multidifferential amplifiers is given. The efficiency evaluation method is based on the construction of a mathematical model of the scheme expressed through low-signal differential h-parameters of the scheme transistors. Thus, the calculation of the main qualitative indicators of the scheme can be carried out by mathematical modeling. The obtained simulation results confirm the efficiency of the proposed circuit design.
Keywords: efficiency evaluation, circuit design, differential stage, dynamic load, destabilizing factors, low-signal parameters
The purpose and objectives of this work is to develop methods of planning the path of the mobile autonomous robots operating in environments with unknown location of obstacles. The result of the article is vague planner travel path of autonomous mobile robots for three-dimensional space (3D environments). The results differ from known analogues structure proposed planner, consisting of two interconnected parts, designed for use in horizontal and vertical planes, context-sensitive coordination method "simple" behavior of the mobile robot, a set of rules governing the method of prevention "jam" in the obstacles.
Keywords: Quad copter, management, uncertainty, decision making, fuzzy logic
The methods and results of designing instrumentation amplifiers multidifferential on two operational amplifiers that significantly reduce the voltage of zero drift circuit and its transfer efficiency of the common-mode voltage. In practical terms, these methods can solve the important task of building a precision analog interface for resistive bridge sensors, which operate over a wide temperature range. Also, it is possible to use multi-bit ADC with a significantly lower reference voltage. Keywords: mixed systems on a chip, instrumentation amplifiers, common-mode signal, multidifferential DU, voltage zero drift, temperature range, multibit ADC.
Keywords: mixed systems on a chip, instrumentation amplifiers, common-mode signal, multidifferential OA, voltage zero drift, temperature range, multibit ADC.
The paper discusses the features of their own circuits and mutual compensation circuitry in a differential stage in CMOS transistors. It is shown that their composition can significantly increase the differential gain in symmetric cascades with a dynamic load, significantly reduce common mode gain and extend the range of operating frequencies. As an example, the evolution of the basic concept of a symmetric stage and the results of its simulation in Cadence Virtuoso.
Keywords: micro circuitry, structural synthesis, complex-function blocks, a differential stage, a CMOS transistor, system-on-chip
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