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Amplifier for subwoofer with output power 100 W
Chevalier, Stanislav ; Petržela, Jiří (referee) ; Kratochvíl, Tomáš (advisor)
This project is focused on design of the power amplifier for subwoofer, its circuit’s protection, speaker’s protection and design of the filter for subwoofer. The amplifier is operating in AB class and its power is up to 100 W/ 4 ohms. It is made of discrete electronics components and devices. The protections of the amplifier are against short circuit in output, the speaker pops when turned on and against the DC voltage at the amplifier’s output. Filter for subwoofer contains combiner at the input, volume control, subsonic filter, low-pass filter with adjustable cut-off frequency and output amplifier with possibility of phase changing of the output signal.
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Doble-balanced mixer - laboratory equipment
Dušek, Libor ; Baran, Ondřej (referee) ; Vágner, Petr (advisor)
The aim of this work was double-balanced mixer implementation, which will be used like laboratory equipment. This thesis deals with design of the double-balanced mixer from first theoretical principles to a practical design of a laboratory equipment. For the practical design the integrated mixer SA612 was used. Input signal to the mixer up to 500 MHz frequency can be used. For required operation external oscillator and fifth-order low pass filter were constructed. Oscillator was designed for fixed frequency 32 MHz. Fifth-order low pass filter was inserted between the mixer and the oscillator, because of filtering higher harmonics. The second aim of the work was measuring double-balanced mixer basic parameters, such as Compression Point (P-1dB) and Intercept Point (IP3). For the IP3 measurement, another one device was required. It consists of the power combiner for mixing two frequency close signals and third-order bandpass filter, which selects required frequency band. Finally, the laboratory equipment was fabricated and its real parameters were measured.
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Amplifier for subwoofer with output power 100 W
Chevalier, Stanislav ; Petržela, Jiří (referee) ; Kratochvíl, Tomáš (advisor)
This project is focused on design of the power amplifier for subwoofer, its circuit’s protection, speaker’s protection and design of the filter for subwoofer. The amplifier is operating in AB class and its power is up to 100 W/ 4 ohms. It is made of discrete electronics components and devices. The protections of the amplifier are against short circuit in output, the speaker pops when turned on and against the DC voltage at the amplifier’s output. Filter for subwoofer contains combiner at the input, volume control, subsonic filter, low-pass filter with adjustable cut-off frequency and output amplifier with possibility of phase changing of the output signal.
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Amplifier for subwoofer with output power 100 W
Chevalier, Stanislav ; Petržela, Jiří (referee) ; Kratochvíl, Tomáš (advisor)
This project is focused on design of the power amplifier for subwoofer, its circuit’s protection, speaker’s protection and design of the filter for subwoofer. The amplifier is operating in AB class and its power is up to 100 W/ 4 ohms. It is made of discrete electronics components and devices. The protections of the amplifier are against short circuit in output, the speaker pops when turned on and against the DC voltage at the amplifier’s output. Filter for subwoofer contains combiner at the input, volume control, subsonic filter, low-pass filter with adjustable cut-off frequency and output amplifier with possibility of phase changing of the output signal.
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Doble-balanced mixer - laboratory equipment
Dušek, Libor ; Baran, Ondřej (referee) ; Vágner, Petr (advisor)
The aim of this work was double-balanced mixer implementation, which will be used like laboratory equipment. This thesis deals with design of the double-balanced mixer from first theoretical principles to a practical design of a laboratory equipment. For the practical design the integrated mixer SA612 was used. Input signal to the mixer up to 500 MHz frequency can be used. For required operation external oscillator and fifth-order low pass filter were constructed. Oscillator was designed for fixed frequency 32 MHz. Fifth-order low pass filter was inserted between the mixer and the oscillator, because of filtering higher harmonics. The second aim of the work was measuring double-balanced mixer basic parameters, such as Compression Point (P-1dB) and Intercept Point (IP3). For the IP3 measurement, another one device was required. It consists of the power combiner for mixing two frequency close signals and third-order bandpass filter, which selects required frequency band. Finally, the laboratory equipment was fabricated and its real parameters were measured.
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