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Vacuum-tube headphone amplifier
Čapka, Jiří ; Kratochvíl, Tomáš (referee) ; Brančík, Lubomír (advisor)
The aim of this bachelor‘s thesis was a complete design and realization of a vacuum-tube headphone amplifier built on the basis of a modern vacuum-tubes. Amplifier should be able to operate in the range of load impedance from 32 to 320 ?. Another aim of the project was to design and construct a power supply unit and a passive equalizer circuit for the amplifier. The project is limited to the amplifier without output transformer (so-called output transformer-less - OTL). The proposed appliance was simulated in PSpice program. An integral part of the project was to design PCB using software Eagle. The simulation results were compared with manual design and measurement results.
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Audio mixing desk
Čapka, Jiří ; Brtník, Bohumil (referee) ; Šotner, Roman (advisor)
The main content of this masters’s thesis is designing of an audio mixing desk and simulation of individual components in software OrCAD. The most important parts of the device are input preamplifiers for dynamic, electret and condenser microphones, stereo unbalanced inputs and balanced line level preamplifiers, equalization circuits and LED level indicators of individual channels, headphone listening circuit, 10-band equalizer, audio spectrum analyzer, circuits with balanced signal for main outputs and power supply circuits.
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Vacuum-tube headphone amplifier
Čapka, Jiří ; Kratochvíl, Tomáš (referee) ; Brančík, Lubomír (advisor)
The aim of this bachelor‘s thesis was a complete design and realization of a vacuum-tube headphone amplifier built on the basis of a modern vacuum-tubes. Amplifier should be able to operate in the range of load impedance from 32 to 320 ?. Another aim of the project was to design and construct a power supply unit and a passive equalizer circuit for the amplifier. The project is limited to the amplifier without output transformer (so-called output transformer-less - OTL). The proposed appliance was simulated in PSpice program. An integral part of the project was to design PCB using software Eagle. The simulation results were compared with manual design and measurement results.
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Audio mixing desk
Čapka, Jiří ; Brtník, Bohumil (referee) ; Šotner, Roman (advisor)
The main content of this masters’s thesis is designing of an audio mixing desk and simulation of individual components in software OrCAD. The most important parts of the device are input preamplifiers for dynamic, electret and condenser microphones, stereo unbalanced inputs and balanced line level preamplifiers, equalization circuits and LED level indicators of individual channels, headphone listening circuit, 10-band equalizer, audio spectrum analyzer, circuits with balanced signal for main outputs and power supply circuits.
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