SEMICONDUCTOR INTEGRATED CIRCUITS

A speaker driver for a single phase supply class G & I

Feng Yong, Yang Shanshan, Peng Zhenfei, Hong Zhiliang and Liu Yang

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Abstract: A speaker driver applied to class G/class I with a single phase power supply is presented. Gain expanding and compressing technology are employed in the signal processing circuit to optimize power dissipation. The circuit is implemented in 0.18 μm N-well CMOS. Experimental results show that the speaker driver has a good audio sound quality and power efficiency. Less than 0.006% THD at a low power range and less than 0.4% at a medium power range can be obtained with a 1 kHz sine wave signal. Maximum output power of 360 mW can be gained at a load of 8 Ω . The power efficiency is about twice that of a traditional class AB driver at the power range of 80 mW and shows more than 18% improvement at the higher output power range.

Key words: class G/class Ispeaker driversingle phase power supplyTHD

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    Received: 18 August 2015 Revised: 23 September 2010 Online: Published: 01 March 2011

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      Feng Yong, Yang Shanshan, Peng Zhenfei, Hong Zhiliang, Liu Yang. A speaker driver for a single phase supply class G & I[J]. Journal of Semiconductors, 2011, 32(3): 035005. doi: 10.1088/1674-4926/32/3/035005 Feng Y, Yang S S, Peng Z F, Hong Z L, Liu Y. A speaker driver for a single phase supply class G & I[J]. J. Semicond., 2011, 32(3): 035005. doi: 10.1088/1674-4926/32/3/035005.Export: BibTex EndNote
      Citation:
      Feng Yong, Yang Shanshan, Peng Zhenfei, Hong Zhiliang, Liu Yang. A speaker driver for a single phase supply class G & I[J]. Journal of Semiconductors, 2011, 32(3): 035005. doi: 10.1088/1674-4926/32/3/035005

      Feng Y, Yang S S, Peng Z F, Hong Z L, Liu Y. A speaker driver for a single phase supply class G & I[J]. J. Semicond., 2011, 32(3): 035005. doi: 10.1088/1674-4926/32/3/035005.
      Export: BibTex EndNote

      A speaker driver for a single phase supply class G & I

      doi: 10.1088/1674-4926/32/3/035005
      • Received Date: 2015-08-18
      • Accepted Date: 2010-08-05
      • Revised Date: 2010-09-23
      • Published Date: 2011-02-23

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