Support/hardware demonstration
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− | The demonstration system plays | + | The demonstration system plays tones on loudspeakers. |
+ | |||
+ | A button allows to define the number of bits the sinewaves are coded on: | ||
+ | This allows to talk of binary numbers. | ||
+ | |||
+ | The foreseen outputs are: | ||
+ | * a loudspeaker with a Digital to Analog Converter (DAC) and an analog amplifier | ||
+ | * a loudspeaker with PWM control and a simple class D amplifier. | ||
+ | |||
+ | = Set-up = | ||
+ | |||
+ | In order to build the demonstration, one needs: | ||
+ | * an FPGA board | ||
+ | * a power supply cable | ||
+ | * a flat band cable | ||
+ | * an [http://wiki.hevs.ch/uit/index.php5/Hardware/Parallelport/heb_rotary HEB board with 4 rotary switches] | ||
+ | * an oscilloscope | ||
+ | * an oscilloscope cable | ||
+ | |||
+ | For the DAC solution, one additionally needs: | ||
+ | * a flat band cable | ||
+ | * a [http://wiki.hevs.ch/uit/index.php5/Hardware/Parallelport/DAC2 HEB DAC board] | ||
+ | * a loudspeaker board | ||
+ | * an RJ45 cable | ||
+ | * a power supply adapter for the loudspeaker board | ||
+ | |||
+ | For the PWM solution, one additionally needs: | ||
+ | * a loudspeaker box with the amplifier on the back side | ||
+ | * a C-shaped FPGA board mezzanine | ||
+ | * an additional oscilloscope cable | ||
= System = | = System = | ||
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The FPGA design can be found in the HEI [https://repos.hevs.ch/svn/eda/VHDL/labs/ELN_support SVN]. | The FPGA design can be found in the HEI [https://repos.hevs.ch/svn/eda/VHDL/labs/ELN_support SVN]. | ||
− | = | + | = Specifications = |
− | + | ||
− | + | ||
− | + | ||
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− | The | + | The operating frequencies are: |
− | + | * clock : 66 MHz | |
+ | * sampling : 44.1 kHz |
Latest revision as of 14:28, 18 September 2019
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The demonstration system plays tones on loudspeakers.
A button allows to define the number of bits the sinewaves are coded on: This allows to talk of binary numbers.
The foreseen outputs are:
- a loudspeaker with a Digital to Analog Converter (DAC) and an analog amplifier
- a loudspeaker with PWM control and a simple class D amplifier.
Set-up
In order to build the demonstration, one needs:
- an FPGA board
- a power supply cable
- a flat band cable
- an HEB board with 4 rotary switches
- an oscilloscope
- an oscilloscope cable
For the DAC solution, one additionally needs:
- a flat band cable
- a HEB DAC board
- a loudspeaker board
- an RJ45 cable
- a power supply adapter for the loudspeaker board
For the PWM solution, one additionally needs:
- a loudspeaker box with the amplifier on the back side
- a C-shaped FPGA board mezzanine
- an additional oscilloscope cable
System
The following system is used to show digital electronic parts to students.
The block diagram is:
The FPGA design can be found in the HEI SVN.
Specifications
The operating frequencies are:
- clock : 66 MHz
- sampling : 44.1 kHz