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Design of low-voltage supply and reference block based on the bandgap reference
Zwiener, Jan ; Kledrowetz, Vilém (referee) ; Prokop, Roman (advisor)
This diploma thesis deals with the analysis and evaluation of four different circuit solutions that are used to construct a stable reference voltage. In the literature, these circuits are referred to as bandgap references, and this thesis discusses the principle of their operation. Based on the achieved results, one circuit solution was selected, which forms the basis of the designed device containing eight reference voltages with values (0.8; 1.0; 1.2; 1.5; 1.8; 2.0; 2.5; 3.3) V and one voltage supply, to which one of the reference voltage values can be assigned using a binary code. This device contains sources of four reference currents with values (1; 2; 4; 8) µA.
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Electrotherapy
Slavíček, Milan ; Rampl, Ivan (referee) ; Chmelař, Milan (advisor)
Aim those work is suggest simple generator for electropathy. In exordium deal with features weaving and fission current used in the electrotherapy. Draft part then includes proposal single part generator and calculations needed to achievement purposes. Result is then diagram simple generator for production Träbert flows and list parts.
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Design of low noise Band Gap reference in BCD process
Kadaňka, Petr ; Prokop, Roman (referee) ; Kadaňka, Petr (advisor)
This diploma thesis focuses on noise analysis of different integrated circuits used for generating temperature stable reference voltage. All noise contributions are studied separately and there is shown a way of their minimization. Circuit using external capacitor with pre-charging system is chosen as the best solution. Output noise of all analyzed circuits is compared and characteristics of final band-gap reference are summarized at the end of the work.
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Curvature correction of the BandGap reference output voltage
Žeravík, František ; Háze, Jiří (referee) ; Prokop, Roman (advisor)
This thesis deals with the design of a Brokaw BandGap reference, a BandGap reference in a simple CMOS process, as well as the respective compensation circuits for correcting the curvature of the output voltage. In the theoretical part, the emphasis is mainly on describing the temperature dependency of the UBE voltage of the bipolar transistor and understanding the principle of the elementary BandGap reference. Based on these findings, the function and design of both BandGap references for an output voltage of 1.5 V are described. In the second part, the thesis focuses on describing various methods for correcting the curvature of the output voltage. Based on these methods, the first-order BandGap references supplemented with compensation circuits are designed. In the conclusion, the resulting parameters of the designed BandGap references without correction and with a compensation circuit are summarized and compared.
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Design of ultra-low current consumption precise voltage reference in 180 nm BiCMOS technology
Varhaník, Jiří ; Háze, Jiří (referee) ; Prokop, Roman (advisor)
The diploma thesis deals with the analysis of noise and accuracy of integrated circuits for temperature stable reference voltage sources. It also describes the individual noise sources. In the first part of the thesis, three variants for the implementation of the voltage reference were tested, with a summary of the achieved parameters. The second part of the diploma thesis deals with the design of the switching reference, including source and control signals. The results of the work are presenting simulated waveforms with a specified accuracy at low circuit consumption.
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Design of low-voltage supply and reference block based on the bandgap reference
Zwiener, Jan ; Kledrowetz, Vilém (referee) ; Prokop, Roman (advisor)
This diploma thesis deals with the analysis and evaluation of four different circuit solutions that are used to construct a stable reference voltage. In the literature, these circuits are referred to as bandgap references, and this thesis discusses the principle of their operation. Based on the achieved results, one circuit solution was selected, which forms the basis of the designed device containing eight reference voltages with values (0.8; 1.0; 1.2; 1.5; 1.8; 2.0; 2.5; 3.3) V and one voltage supply, to which one of the reference voltage values can be assigned using a binary code. This device contains sources of four reference currents with values (1; 2; 4; 8) µA.
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Design of voltage references in BiCMOS ONC18 process
Dušek, Samuel ; Prokop, Roman (referee) ; Šotner, Roman (advisor)
This bachelor's thesis deals with design of voltage references in 180 nm technology of the ON Semiconductor company with main focus on the lowest value of power supply. First part presents theoretical knowledge concerning voltage references. The next part introduces chosen topologies, describes their function and methods of initial design. In this part there are also shown results which were achieved after initial design and after optimization of all references. The last part appraises the best replacement for bandgap etalon in area of power supply, where bandgap reference can not work properly.
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Design of DA converter with fully differential output in CMOS technology
Mácha, Petr ; Prokop, Roman (referee) ; Kledrowetz, Vilém (advisor)
This diploma thesis deals with the design of eight-bit digital to analog coverter with fully differential outputs in technology I3T25 of ON Semiconductor company. The work contains the description of basic structures and characteristics of digital to analog converters. The main focus of the work is to design a converter and auxiliary circuits at the transistor level. The functionality of designed circuits is verified by simulation environment Cadence.
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Design of a pressure monitor for biomedical applications
Tenora, Jan ; Kolka, Zdeněk (referee) ; Biolková, Viera (advisor)
The goal of this bachelor’s thesis was to gather requirements for the realization and functional features of the proposed pressure monitor. Based on the collected requirements, the block diagram and also the complete schematic were proposed. Then the printed circuit board was designed, made and fitted. This board was placed into prepared box together with other components. Finished equipment was tested, set and also precision was checked by its measurement. Finally, user guide and also service manual were written.
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Tutorial kits for course Powering electronic devices
Pochobradský, Jakub ; Švábeník, Petr (referee) ; Kubíček, Michal (advisor)
The goal of this bachelor thesis is to make a design of tutorial kits with a charge pump, DC/DC converter and a reference voltage and current sources that could be used in laboratory classes. In the first part basic principles of a charge pump and DC/DC converter are described. The second part is related to integrated circuits that are specific for construction of charge pumps and DC/DC convertors. The third part contains design of printed circuits.
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