Question: In high power audio electronics, traditional ( Class A ) transistor amplifiers can't be used due to high inefficiency, rather, a class D amplifier is
In high power audio electronics, traditional Class A transistor amplifiers can't be used due to high inefficiency, rather, a class D amplifier is used to increase the efficiency. These amplifiers use a PWM signal to drive a pair of high power Mosfet switches, which is then filtered to recover the pure audio signal. The circuit is as follows:
A given microcontroller uses a clock frequency of MHz We want our amplifier to have a PWM frequency of kHz and we want an active high duty cycle of what value should be loaded into the GPTMTAILR register? What should be loaded into the GPTMATCHR register? Assume the TAPWML register is set to
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