EMVs/AudioAmp
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The system consists of: | The system consists of: | ||
* an A/D converter which receives an audio signal | * an A/D converter which receives an audio signal | ||
− | * a digital circuit (FPGA) which mutiplies this signal | + | * a digital circuit (FPGA) which mutiplies this signal by a gain and builds a Pulse Width Modulated (PWM) signal out of it |
* a class D amplifier which drives a loudspeaker from the PWM signal | * a class D amplifier which drives a loudspeaker from the PWM signal | ||
* a step-up circuit which generates a power supply voltage from a 12 V battery in order to have enough power to drive the loudspeaker | * a step-up circuit which generates a power supply voltage from a 12 V battery in order to have enough power to drive the loudspeaker |
Revision as of 14:51, 15 January 2014
The Audio amplifier project is a one day sneak preview of the electronics taught at the Industrial Systems section of HES-SO//Valais Wallis. As such, it presents a mixed analog/digital system.
The system consists of:
- an A/D converter which receives an audio signal
- a digital circuit (FPGA) which mutiplies this signal by a gain and builds a Pulse Width Modulated (PWM) signal out of it
- a class D amplifier which drives a loudspeaker from the PWM signal
- a step-up circuit which generates a power supply voltage from a 12 V battery in order to have enough power to drive the loudspeaker
The project is presented to the EMVs students. They are provided with specifications in french.