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Precise Frequency Generator - DDS
Kratochvíl, Petr ; Vágner, Petr (referee) ; Baran, Ondřej (advisor)
This work deals with frequency generators based on the direct digital synthesis method DDS. Basic principles and attributes of the frequency generator DDS are explained. The text describes parameters influencing and defining a quality of the generated signal. The list of available integrated circuits realizing the direct digital synthesis is mentioned. A construction of the DDS generator with a device AD9954 and the generator control are described. At the end of the work, the function and parameters of the designed generator are verified.
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Function generator with direct digital synthesis
Gál, Radek ; Prokopec, Jan (referee) ; Frýza, Tomáš (advisor)
This bachelor’s thesis describes the design and construction of function generator, which is based on an integrated circuit of a direct digital synthesis. The device has two outputs; first generates harmonic or triangular wave and second generates square wave. Adjustment of output signal is enable with using the buttons, the incremental rotation sensor and potentiometer and displaying by using the LCD display. Generator allows adjust output frequency in range from 1 Hz up to 10 MHz with 1 Hz step size, output voltage smoothly 0 – 10 V peak-peak or using -20 dB attenuator and dc-offset in range from -5 V to +5 V. Device has RS232 interface for connect with the PC.
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Algorithms for Synthesis of Musical Sounds
Novák, Samuel Matyáš ; Heriban, Pavel (referee) ; Roupec, Jan (advisor)
This work concerns the problem of synthesizing musical sounds, specifically the problem of designing oscillator algorithms. The problem is approached from the perspective of function composition and phase distortion. Interpolation polynomials, iteration methods and optimization were employed when designing the necessary functions. Phase accumulator and a sine waveshaping function were constructed. Furthermore, a way of distorting the sine waveform was presented. Finally, a method of synthesizing detuned voices of a sawtooth wave was described.
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Algorithms for Synthesis of Musical Sounds
Novák, Samuel Matyáš ; Heriban, Pavel (referee) ; Roupec, Jan (advisor)
This work concerns the problem of synthesizing musical sounds, specifically the problem of designing oscillator algorithms. The problem is approached from the perspective of function composition and phase distortion. Interpolation polynomials, iteration methods and optimization were employed when designing the necessary functions. Phase accumulator and a sine waveshaping function were constructed. Furthermore, a way of distorting the sine waveform was presented. Finally, a method of synthesizing detuned voices of a sawtooth wave was described.
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|
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Function generator with direct digital synthesis
Gál, Radek ; Prokopec, Jan (referee) ; Frýza, Tomáš (advisor)
This bachelor’s thesis describes the design and construction of function generator, which is based on an integrated circuit of a direct digital synthesis. The device has two outputs; first generates harmonic or triangular wave and second generates square wave. Adjustment of output signal is enable with using the buttons, the incremental rotation sensor and potentiometer and displaying by using the LCD display. Generator allows adjust output frequency in range from 1 Hz up to 10 MHz with 1 Hz step size, output voltage smoothly 0 – 10 V peak-peak or using -20 dB attenuator and dc-offset in range from -5 V to +5 V. Device has RS232 interface for connect with the PC.
|
|
|
Precise Frequency Generator - DDS
Kratochvíl, Petr ; Vágner, Petr (referee) ; Baran, Ondřej (advisor)
This work deals with frequency generators based on the direct digital synthesis method DDS. Basic principles and attributes of the frequency generator DDS are explained. The text describes parameters influencing and defining a quality of the generated signal. The list of available integrated circuits realizing the direct digital synthesis is mentioned. A construction of the DDS generator with a device AD9954 and the generator control are described. At the end of the work, the function and parameters of the designed generator are verified.
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