Low Frequency Dithering
The open loop and closed loop class-D amplifiers both opt for low frequency dithering for linearization, due to their high slope gain. They may opt for drain efficiency improvement, depending on their process technology, or intrinsic capacitance value. In order to verify the theoretical findings for linearity and efficiency behavior, two cases are realized and investigated thoroughly: an open loop voltage mode and an open loop current mode Class-D amplifier, while the former is dithered as a single ended amplifier and the latter one is dithered in common mode.
KeywordsOpen Loop Drain Efficiency Adjacent Channel Power Ratio Dither Signal Forward Gain
- 1.TS 25.101 (V5.2.0), 3GPP Standard, 2002Google Scholar