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.

Classical implementation of active selective amplifiers (SA) are usually associated with design sophisticated active elements (operational amplifiers) that consume relatively large power from their universality. This paper present the active SA based on an analog array chip ABMK_1_3, that have high level of radiation resistance to the flow of neutrons and accumulated dose of radiation. This SA implemented on the basis of a voltage-to-current converter with a minimum number of transistors and low consumption static current. Efficient use of current amplifier can be explained by use frequency dependent symmetric chains in a feedback loop. This property provides the independence of the pole frequency f0 = fp on the gain of the active element, as well as maximizing the quality factor.
The basic analytical expressions that establish the relationships between the SA and the characteristics of active and passive components are given. The relations that help minimize sensitivity of parameters SA to instability properties of the components are considered. Simulation results of desired SA are shown.  

Keywords: selective amplifier, bandpass filter, active RC-filter, analog array chip, radiation hardness

The paper shows the feasibility of using a current amplifier in the filters RF and microwave ranges. By analyzing the basic structure of the second-order level sufficient conditions for the efficient use of active elements. The examples of methodological nature and formulated conclusions of practical importance.

Keywords: RF filter, microwave filter, parametric sensitivity, current amplifiers, functional modeline setting

  The paper contains a mathematical formulation of the problem of synthesis interferometric determination of the relative coordinates of the radio-emitting objects. Option structural implementation of the interface for it to work in real-time microcomputer-based system of passive location proposed. Version of the algorithm operation interface includes a primary carrier detect and calculate the phase difference between the received signals was proposed. Hardware requirements are formulated its implementation.

Keywords: interface structure, the coordinate, algorithm, the interferometer, radio-emitting objects

  The paper offers a solution to the general problem of circuit synthesis for n-MOS transistor level band pass filter based on current amplifier with a limited transmission coefficient. The possibility of optimal choice of the parametric compromise. The results of modeling circuit in Cadence Virtuoso environment component-based workflow SGB25VD.

Keywords: CMOS transistor, a band pass filter, a selective amplifier, system on chip, gain, voltage-to-current

  This paper presents a generalized framework level band pass filter used in the construction of broadband active RC filters. The conditions that determine the potential stability of the broadband link and its parameters. A variant of circuit implementation, in which low parametric sensitivity of Q to passive circuit elements is achieved on the basis of its own compensate small-signal parameters of bipolar transistors parameters amplification. The results of computer simulations have confirmed that the principle of self compensate coupling semiconductor can significantly reduce the sensitivity of the parametric parts of the second-order band-pass filters based on existing low technologies.

Keywords: system-on-chip, band pass filter, quality, current amplifier, the sensitivity, bipolar transistor

  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

`

Keywords: