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This article presents the design results of the precision microcircuit of the instrumentation amplifier (IA) based on the fully differential difference op-amp (FDDA) and the double-channel low pass filter (LPF). It shows that the application of such IA leads to the high parameters of the sensor interface in the stability of offset voltage (V∞ < 250uV) and common-mode rejection in the extended temperature...
The nonclassical approach to a logic synthesis of k-valued digital structures is considered. It is based on replacing the classical body of mathematics of the logic synthesis (Boolean algebra) – linear algebra. The features of the circuit implementation of operations of linear algebra necessitate going from the potential signals to the current ones. In particular, the new approach is developed, using...
The paper considers the conditions of synthesis of a special compensation circuit (CC) of parasitic capacitance connected with an output of classic transistor stage (TS) from the common ground of the theory of automatic control systems. The purpose of CC is to extend the frequency range of TS, especially at high-resistance loads, including active ones. It is shown that the connected CC should contain...
This paper describes a nonclassical approach to the logical synthesis and circuitry designing of digital IP-modules for computer facilities, control systems and communication. It is based on changing from Boolean algebra by another algebraic structure to the linear algebra. The process of the logical synthesis and circuitry designing of digital devices is described in the offered algebraic structure...
The methods of correction of the phase angle error of the phase splitters (PS) of microwave band based on the differential stage designed for quadrature demodulators of the modern communication systems are suggested. The synthesis strategy of circuits of correction of the second order providing reduction of the amplitude-dependent phase shift up to 1–2 degree between the output signals of PS in the...
Circuit design features of integrated active band-pass RC and RLC filters with low pole-Q and pole-fp sensitivity are considered. The architectures of RC and RLC filters on base of current amplifiers are discussed. Circuits and simulation results of the integrated filters on IHP 0.25 µm SiGe process are given.
This article reviews the circuit methods for the construction of the temperature-stable voltage references with the use of base of npn-type and pJFET transistors. The new circuitry of the voltage references is suggested for BiFET technology which renders possible to create microelectronic products with the radiation hardness up to 1 Mrad and F=1013 ÷ 1014 n/cm2 acceptable for many applications.
The method of increasing (by 5÷10 times) of the voltage transfer ratio (Gain) of the broadband cascode amplifiers (BCA) with the passive load in the form of the relatively low-ohmic resistor (R1=0.5÷1 kOhm) is considered. The effect of the increase of the gain of BCA is provided due to the introduction of a special circuit of the inherent compensation R1. The architectures of BCA on the bipolar and...
The new architecture of the differential stages (DS), that provides the increase of the voltage gain on 1 or 2 orders without using of the classical active loads (current mirrors) on p-n-p transistors is considered. The recommended application field is analog and analog-to-digital circuits with the low supply voltage. The effect of increasing of the gain of DS at relatively low-ohmic resistors of...
It is considered the problem of synthesis of structural and schematics of bipolar analog ICs based on the classic “folded” cascode which have a small zero-level (offset voltage, Vov) and its drift in the terms of temperature and radiation effects. Thus the basis of the modernization of the scheme are adopted by well-known basic analog IC (operational amplifiers, continuous stabilizers, voltage comparators,...
The paper present a method of improving the performance of sensors of physical quantities with potential output, which have output parasitic capacitance. The practical scheme based on the introduction of the basic sensor schematic special circuit correction of dynamic parameters. The conditions of synthesis of correction circuits that compensate the influence of parasitic capacitance sensor on the...
The architecture and circuitry of the differential difference amplifier (DDA) with higher radiation hardness (the total dose of radiation is up to 1 millirad, the neutron flux is up to 1013 n/cm2) are reviewed. The fundamental equations are obtained which simplify the parameter determination of the analog and digital interfaces on its basis. The characteristics of the main connection circuits of DDA...
The paper presents the method of increasing of the response time of the sensors of different physical magnitudes with the high output resistance, for example, the photodiodes for the optical systems of the digital information transmission. The features of method of the correction circuit of the current-voltage converters, which compensates the influence of the parasitic capacitance of the load on...
The modified method of the increase of the response speed of flash ADCs with the differential input which renders possible to reduce the effect of the parasitic capacitances of active and passive components of the analog sections and also to optimize their gain flatness is reviewed. The additional emitter follower and balancing capacitor are fed into each analog section to extend the bandwidth of...
Non-classical approach to logical synthesis of multi-valued elements (ME) of computer equipment, based on principles of linear algebra, is considered. Ideology and basic principles of ME building, which are non-similar to traditional one are described.
The circuit principle of construction of the lowspeed selective amplifiers (SA) of microwave range on the energy-efficient converters "voltage-current" is developed. The proposed solution provides the possibility of cascade connection of several SA without additional loops of matching of the static mode. The principle of symmetry of the frequencydependent feedback loop underlies in the circuit...
The architectural solutions of the differential stages (DS) on the bipolar SiGe transistors of microwave range operating at low voltage supply are suggested. The peculiarity of the reviewed circuits lies in the absence of the traditional current references in the common emitter loop of DS which is changed by comparatively low-ohmic resistor (R0). The special channels of compensation of the effect...
The architecture features of selective amplifiers of microwave ranges are considered. The expediency of usage Gilbert's current amplifiers is shown. The examples of a circuit design are given and conclusions of application importance are formulated. The simulation results of designed selective amplifier are given.
The features of circuit design method for bandwidth extension of resistive voltage divider of variable attenuators (AT) with parasitic capacitance in the load circuit, are considered. It is shown, that when changing the transmission coefficient of AT over a wide range the conditions of a significant increase of the proposed AT bandwidth are not changed. This feature of the considered circuit is its...
This paper presents the methods of the response speed increase of the parallel ADC's with the differential input that allow reducing of the parasitic capacitances effect of the active and passive components in the analog sections, and also optimizing the amplitude frequency response irregularity.
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