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Analog nonlinear function structures for educational laboratory purposes
Filko, Patrik ; Dvořák, Radek (referee) ; Šotner, Roman (advisor)
This master’s thesis deals with the design and the realization of a laboratory teaching device, which includes two-port parts with nonlinear transmission characteristics corresponding to quadratic, inverse quadratic and cubic functions. It also includes a more complicated design of a polynomial function converter that offers students a practical view of functions mathematically designed while verifying their accuracy in laboratory exercises. The whole concept is supported by the design of the power supply circuit and the harmonic signal generator. The individual features of this project are feasible from components commercially available.
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Analysis, features and applications of available current mode multipliers
Miksl, Jan ; Jeřábek, Jan (referee) ; Šotner, Roman (advisor)
The diploma thesis deals with analysis, validation, measurement of parameters of the commercially available current multiplies (namely the EL2082 and EL4083) and their applications in practice. Control analysis are carried out in OrCAD PSpice program and compared with values from datasheets. Control analysis are focused on AC and DC characteristics of these active blocks. There are discusses the input impedance, the output impedance, the current gain and the possibility of electronic adjusting. The parameters of the elements were verified by measurements. Proposals for circuit applications (selective circuit, oscillator, frequency filter) with EL2082 and EL4083 are presented and analyzed in the program OrCAD. Three oscillator circuit designs are experimentally tested and the results are compared with the theoretical expectations and simulations in OrCAD. The possibility of electronic control for oscillators is examined. Also the sensitivity and the tolerance analysis are carried out. The constructional details of oscillators are presented at the end of this work.
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Analysis, features and applications of available voltage mode multipliers
Kopeček, Pavel ; Koton, Jaroslav (referee) ; Šotner, Roman (advisor)
This work deals with the analog multipliers, mainly of the voltage multipliers. Also the modifications of current output will appear here. The first part is devoted to a choice several multipliers and a description of their functions, the possible involvement and introduction of the most important catalog values. The next section deals with the simple application that contains at least one of the multipliers. Next was the implementation of selected applications and measure their actual performance parameters. Results are then compared with computer simulations. As final step is done of tolerance and sensitivity analysis of simulated configurations of circuits.
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Laboratory device with analog computational unit AD538
Hruboš, Zdeněk ; Slezák, Josef (referee) ; Petržela, Jiří (advisor)
An analog multiplier are circuits, that are realized multiplication of two analog signals. They can be made by suitable connection (according to function) discreet parts. Nowadays there are integrated circuits in advance function, whose internal structure is made by complex of circuits with operating ampfliers and other circuits. These circuits have a very high accuracy of arithmetic operation which is mostly better than 1%. The analog multiplier are used in situation, when we need realize multiplication, division, exponentation, square root extraction and logarithmic calculation of analog signals. In the next are used in circuits for multiplication of frequency, shifting of frequency, amplitude modulation, detection phase angel of two signals with the same frequency, etc. The AD538 is a monolithic real-time computational circuit that provides precision analog multiplication, division and exponentiation. The combination of low input and output offset voltages and excellent linearity results in accurate computation over an unusually wide input dynamic range.
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Tests of integrated analog multipliers
Stolařová, Hana ; Dvořák, Radek (referee) ; Šotner, Roman (advisor)
This diploma thesis deals with the design of testing device (tester) for basic verification of parameters and construction of applications using analog multipliers fabricated in TSMC 0.18 m 1.8 V process. The tester is than used for several eperimental measurements such as AC responses, DC responses, total harmonic distortion, offset and input and output impedance. A part of the thesis covers also designs of application examples (circuits) wich use these special analog multipliers (triangular and square wave generator, 2nd order active filter, integrator, etc.).
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Accurate wattmeter for measure power loss in feromagnetic controlled AVR
Smutný, Martin ; Drexler, Petr (referee) ; Roubal, Zdeněk (advisor)
Electronic wattmeters excel in very small (up to negligible) own consumption. The basiccomponents of these devices is the multiplier - a circuit whose output voltage is proportional to the product of input voltage. Wattmeter is a device that contains two coils, one of which is the current coil voltage and the second coil. Current coil is connected in series with the measured electrical circuit and the voltage measuredparallel to the coil circuit. Current flowing through the coil current causes a magnetic field is proportional to the current flowing through the phase shift and. Electromagnetic fields of both coils influence each other in case of measurements in a DC circuit, the resultingdeflection proportional to both voltage and current. When measured in AC electrical powercircuits can be determined using the effective values of current and voltage, and their mutualphase shift. A magnetic induction B can be determined using mean values. An analog multiplier are circuits, that are realized multiplication of two analog signals. They can be made by suitable connection (according to function) discreet parts. Nowadays there are integrated circuits in advance function, whose internal structure is made by complex of circuits with operating ampfliers and other circuits. These circuits have a very high accuracy of arithmetic operation which is mostly better than 1%. The analog multiplier are used in situation, when we need realize multiplication, division, exponentation, square root extraction and logarithmic calculation of analog signals.
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Accurate wattmeter for measure power loss in ferrite core
Zdražil, Lukáš ; Steinbauer, Miloslav (referee) ; Roubal, Zdeněk (advisor)
Losses in ferromagnetic materials can be measured by a wattmeter. They can be divided into eddy current losses and hysteresis losses. Loss measurements are performed on closed samples. Wattmeters should be accurate and sensitive. There are electrodynamic wattmeters used which reach the maximum deflection at a power factor less than one. Another possible way how to measure losses is by the usage of special electronic circuits. The main part of these circuits is called an analog multiplier. The analog multiplier performs a product of two input signals, especially voltage or current. For these purposes a lot of integrated circuits have been developed. The biggest producers are companies such as Analog Devices and Texas Instruments.
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Design of low-frequency phase locked loop for sensing applications in low-voltage TSMC 0.18 um process
Svoboda, Marek ; Dvořák, Radek (referee) ; Šotner, Roman (advisor)
The work deals with the design of FM modulation chains and their sub-circuits, which construction is based on analog multipliers produced in the TSCM process 0.18 m 1.8 V. One chain operate with a rectangular carrier and the other one with a harmonic carrier wave. The basic carrier frequency is 100 kHz, and the basic test modulation signal is 1 kHz harmonic waveform. Demodulators are built on the principle of the phase-locked loop, and the aim of the work is to verify the functionality of such a loop and to determine its limiting properties. The work also contains graphical outputs from the Cadence Virtuoso development package, in which all simulations were performed.
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Tests of integrated analog multipliers
Stolařová, Hana ; Dvořák, Radek (referee) ; Šotner, Roman (advisor)
This diploma thesis deals with the design of testing device (tester) for basic verification of parameters and construction of applications using analog multipliers fabricated in TSMC 0.18 m 1.8 V process. The tester is than used for several eperimental measurements such as AC responses, DC responses, total harmonic distortion, offset and input and output impedance. A part of the thesis covers also designs of application examples (circuits) wich use these special analog multipliers (triangular and square wave generator, 2nd order active filter, integrator, etc.).
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