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Controll Module for Circuits with ADF4360 and Selected DDS
Lambor, Jiří ; Vágner, Petr (referee) ; Urbanec, Tomáš (advisor)
This bachelor’s thesis is focused on issues of communication between microprocessor unit and frequency synthesizer circuits - direct digital synthesis circuit (DDS), voltage control oscillator with phase lock loop (ADF). The basic theoretical function of DDS, ADF and SPI interface is described in the introduction. The solution and drafts of modules hardware are shown in next chapter. Last chapter describes programming of DDS and ADF circuits with examples of this code in C language. Schemes and board layouts of modules are attached in appendix.
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Satellite Receiver with Integrated Antenna Tuner
Matoušek, Martin ; Pítra, Kamil (referee) ; Urbanec, Tomáš (advisor)
This work is focused on proposal of receiver with Integrated Antenna Tuner operating at 28 MHz. The design was primarily focused on simplicity and low power consumption. The receiver is adapted for SSB modulation. This work was realized for the transmission of audio signals. SSB modulation is far more efficient in terms of the radio spectrum used. First part of this thesis describes about the Antenna Tuner and block diagram of a receiver. Next parts are focused on proposal of individual blocks of the receiver, especially its most important parts. Finally, the overall evaluations of the design characteristics of SSB receivers with Integrated Antenna Tuner are discussed.
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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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Satellite Receiver with Integrated Antenna Tuner
Matoušek, Martin ; Pítra, Kamil (referee) ; Urbanec, Tomáš (advisor)
This work is focused on proposal of receiver with Integrated Antenna Tuner operating at 28 MHz. The design was primarily focused on simplicity and low power consumption. The receiver is adapted for SSB modulation. This work was realized for the transmission of audio signals. SSB modulation is far more efficient in terms of the radio spectrum used. First part of this thesis describes about the Antenna Tuner and block diagram of a receiver. Next parts are focused on proposal of individual blocks of the receiver, especially its most important parts. Finally, the overall evaluations of the design characteristics of SSB receivers with Integrated Antenna Tuner are discussed.
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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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Controll Module for Circuits with ADF4360 and Selected DDS
Lambor, Jiří ; Vágner, Petr (referee) ; Urbanec, Tomáš (advisor)
This bachelor’s thesis is focused on issues of communication between microprocessor unit and frequency synthesizer circuits - direct digital synthesis circuit (DDS), voltage control oscillator with phase lock loop (ADF). The basic theoretical function of DDS, ADF and SPI interface is described in the introduction. The solution and drafts of modules hardware are shown in next chapter. Last chapter describes programming of DDS and ADF circuits with examples of this code in C language. Schemes and board layouts of modules are attached in appendix.
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