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Headphone amplifier with low output impedance
Zavřel, Petr ; Kubánek, David (referee) ; Hanák, Pavel (advisor)
Semestral thesis deals with design of headphone amplifier with low output impedance in audible spectre suitable for laboratory measurement. Amplifier can proces balanced and unbalanced input signal with implemented protection against damage to amplifier. Concept is designed for the lowest total harmonic distortion and signal to noise ratio of amplifier. Thesis also contains design of low-noise power supply. It works with already known circuits which was tested, improved and discused in the thesis. Thesis also deals with placement into suitable box.
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Implementation of the I2S Driver into the Freescale MQX RTOS
Možný, Karel ; Hynčica, Ondřej (referee) ; Kučera, Pavel (advisor)
This thesis deals with design and development of a I2S module driver for real-time operating system MQX running on a ColdFire V4 architecture based processor. Further there are presented circuit diagrams and PCBs created for testing of functions and properties of the driver. Signal input is a digital audio in form of S/PDIF interface, output is an analogue signal, that can be listened by the means of a headphone amplifier. The conclusion describes a sample application demonstrating function of the driver on developed hardware.
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Precision amplifier for acoustic characterization of headsets
Kadlec, Matěj ; Schimmel, Jiří (referee) ; Hanák, Pavel (advisor)
This bachelor’s thesis deals with design of measurement interface compliant with ITU-T P.381 for measuring electroacoustic qualities of communication devices (e.g. headsets, handsets). Thesis provides design of main electrical circuit which combines headphone amplifier and two microphone preamplifiers – one for electret microphone and one for standard XLR microphone with optional phantom power. Power supply and auxiliary circuits are also considered in the design.
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Headphone amplifier with low output impedance
Zavřel, Petr ; Kubánek, David (referee) ; Hanák, Pavel (advisor)
Semestral thesis deals with design of headphone amplifier with low output impedance in audible spectre suitable for laboratory measurement. Amplifier can proces balanced and unbalanced input signal with implemented protection against damage to amplifier. Concept is designed for the lowest total harmonic distortion and signal to noise ratio of amplifier. Thesis also contains design of low-noise power supply. It works with already known circuits which was tested, improved and discused in the thesis. Thesis also deals with placement into suitable box.
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Implementation of the I2S Driver into the Freescale MQX RTOS
Možný, Karel ; Hynčica, Ondřej (referee) ; Kučera, Pavel (advisor)
This thesis deals with design and development of a I2S module driver for real-time operating system MQX running on a ColdFire V4 architecture based processor. Further there are presented circuit diagrams and PCBs created for testing of functions and properties of the driver. Signal input is a digital audio in form of S/PDIF interface, output is an analogue signal, that can be listened by the means of a headphone amplifier. The conclusion describes a sample application demonstrating function of the driver on developed hardware.
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