Support/hardware demonstration
From FSI
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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
