A class D amplifier with dynamic element matching

A prior-art class D amplifier has been developed for automotive applications with state-of-the-art performance. The gain of the class D amplifier is determined by a fully-differential resistor bridge. The mismatch of the resistors lead to second harmonic distortion. Chopping technique can be applied to mitigate the issue. However, since the output stage of the class D amplifier is 14 V, a large-signal high-voltage chopper with floating driver circuitry must be developed.

Contact

dr. (EI group) Qinwen Fan

Electronic Instrumentation Group

Department of Microelectronics

Last modified: 2019-10-02