Revision as of 17:22, 22 January 2020 by Francois.corthay
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
Some improvements are suggested for the years to come.