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6. How to design driving circuit for micro-speakers?

Driving circuits serve the purpose of amplifying audio signal and inputting it into micro-speakers. Typically micro-speakers are complemented by one of the two following amplifier circuit. First, clients use AB-class amplifier since it’s easier to design and cheaper, yet it’s not efficient and produces excess heat; To mitigate those problems, most of the clients now chooses D-class amplifier, which uses PWM to send audio signal into the micro-speaker. The advantage of D-class amplifier is its high efficiency and low heat emission, yet is suffers from EMI problems.

     

 

Distribution Partner for USound

USound is a fabless audio company offering high-performance silicon speakers and high-quality sound solutions based on MEMS (Micro-Electro-Mechanical Systems) technology, safeguard by over 150 patents. With its offices in Graz, Vienna, San Francisco, Shenzhen, USound serves international customers, enabling them to create innovative smart audio applications with MEMS speakers.

Address: Kratkystraße 2 8020 Graz, Austria. 
Phone: +43-720-022463

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Fax: +886-2-8866-5250
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