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Application possibilities of LNVGA programmable amplifier
Sobotka, Josef ; Hanák, Pavel (referee) ; Jeřábek, Jan (advisor)
This thesis deals with the theoretical description of the qualitative characteristics and parameters of some modern active elements, also discusses the theory of signal flow graphs at the level applicable for the following frequency filter design methods. The thesis is also generally discussed the issue with the circuit simulator PSpice modeling theory and voltage amplifiers on the basic 6-levels. The practical part of the work is divided into two parts. The first practical part is dedicated to design four levels of simulation model of components LNVGA element. The second practical part contains detailed theoretical proposals for three circuit structures implementing the frequency filters 2nd order (based on the basic structure of the OTA-C) using signal flow graphs with configuration options of Q and fm based on the parameters of active elements in the peripheral structure and their verification with prepared LNVGA model layers.
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Audio amplifier with digital input and power and headphone output stage
Abrman, Milan ; Šotner, Roman (referee) ; Kratochvíl, Tomáš (advisor)
The aim of this thesis is design and construction of amplifier for high quality home listening experience. Device is able to process both analogue signal and high sampling frequency digital input with high audio bit depth. Scope of the thesis covers the design of all the functional units: input signal circuit, S/PDIF receiver, D/A converter, high performance class D amplifier and precise headphone amplifier for dynamic sound presentation. Thesis also cover design of all control circuits containing rotary encoder with button input, microcontroller unit, digital potentiometer and segment display.
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Application of modern active blocks in harmonic oscillators
Votýpka, František ; Kubánek, David (referee) ; Slezák, Josef (advisor)
This work deals with using modern active functional blocks in electronic circuits. These blocks have better features than classical operational amplifiers and are characterized especially by working in current mode. Therefore these blocks can be used in higher frequencies. Using those blocks it is possible to design e.g. electronically variable-frequency filters of types low-pass filter, high-pass filter, band-pass filter, etc. Then it is also possible to easily realize electronically variable-frequency oscillators. This work is focused on some of these blocks, their basic characteristics and principles. Also three oscillators with current conveyors of second generation are designed. Its made simulation, sensitivity and tolerance analysis and magnitude stabilization. Everything is performed in OrCAD PSpice program. These made oscillators are electronic tunable in the band frequency ones of MHz.
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Hybrid headphone amplifier for the high-end listening and performance
Čacký, Adam ; Šotner, Roman (referee) ; Kratochvíl, Tomáš (advisor)
This bachelor´s thesis describes the design of a high quality small portable headphone amplifier for dynamic headphones. Part of the work is theoretical assumptions for the optimal design and implementation of peripheral involvement, comparing the properties of components used and the resulting parameters of modeled device. Analyses of the electrical quantities of the circuit created in simulation software are enclosed.
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|
|
Audio amplifier with digital input and power and headphone output stage
Abrman, Milan ; Šotner, Roman (referee) ; Kratochvíl, Tomáš (advisor)
The aim of this thesis is design and construction of amplifier for high quality home listening experience. Device is able to process both analogue signal and high sampling frequency digital input with high audio bit depth. Scope of the thesis covers the design of all the functional units: input signal circuit, S/PDIF receiver, D/A converter, high performance class D amplifier and precise headphone amplifier for dynamic sound presentation. Thesis also cover design of all control circuits containing rotary encoder with button input, microcontroller unit, digital potentiometer and segment display.
|
|
|
Hybrid headphone amplifier for the high-end listening and performance
Čacký, Adam ; Šotner, Roman (referee) ; Kratochvíl, Tomáš (advisor)
This bachelor´s thesis describes the design of a high quality small portable headphone amplifier for dynamic headphones. Part of the work is theoretical assumptions for the optimal design and implementation of peripheral involvement, comparing the properties of components used and the resulting parameters of modeled device. Analyses of the electrical quantities of the circuit created in simulation software are enclosed.
|
|
|
Application possibilities of LNVGA programmable amplifier
Sobotka, Josef ; Hanák, Pavel (referee) ; Jeřábek, Jan (advisor)
This thesis deals with the theoretical description of the qualitative characteristics and parameters of some modern active elements, also discusses the theory of signal flow graphs at the level applicable for the following frequency filter design methods. The thesis is also generally discussed the issue with the circuit simulator PSpice modeling theory and voltage amplifiers on the basic 6-levels. The practical part of the work is divided into two parts. The first practical part is dedicated to design four levels of simulation model of components LNVGA element. The second practical part contains detailed theoretical proposals for three circuit structures implementing the frequency filters 2nd order (based on the basic structure of the OTA-C) using signal flow graphs with configuration options of Q and fm based on the parameters of active elements in the peripheral structure and their verification with prepared LNVGA model layers.
|
|
|
Application of modern active blocks in harmonic oscillators
Votýpka, František ; Kubánek, David (referee) ; Slezák, Josef (advisor)
This work deals with using modern active functional blocks in electronic circuits. These blocks have better features than classical operational amplifiers and are characterized especially by working in current mode. Therefore these blocks can be used in higher frequencies. Using those blocks it is possible to design e.g. electronically variable-frequency filters of types low-pass filter, high-pass filter, band-pass filter, etc. Then it is also possible to easily realize electronically variable-frequency oscillators. This work is focused on some of these blocks, their basic characteristics and principles. Also three oscillators with current conveyors of second generation are designed. Its made simulation, sensitivity and tolerance analysis and magnitude stabilization. Everything is performed in OrCAD PSpice program. These made oscillators are electronic tunable in the band frequency ones of MHz.
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