Chin. J. Semicond. > 2006, Volume 27 > Issue 9 > 1552-1556

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A New Structure for a CMOS Audio Power AMP with Extremely Low THD and Low Power Consumption

Cao Zhengxin and Xiong Shaozhen

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Abstract: A new system-corrected CMOS audio power AMP is presented.Consisting of four single-end OPAs,this structure is a pseudo-differential system.Compared to conventional CMOS power AMPs,it has the merits of low power consumption,extremely low THD,easy compensation,and good driving capability.With 1st silicon 0.25μm 1P4M CMOS technology and a 3V power supply,the output range can be 4Vpp when driving an 8Ω‖300pF load,while its power dissipation is less than 3mW.The THD is better than 0.003% at 1kHz.A new over-current protection circuit,which can effectively protect the power output circuits on the chip,is also demonstrated.

Key words: system-corrected structureCMOS power AMPover-current protection

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    Received: 18 August 2015 Revised: 29 April 2006 Online: Published: 01 September 2006

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      Cao Zhengxin, Xiong Shaozhen. A New Structure for a CMOS Audio Power AMP with Extremely Low THD and Low Power Consumption[J]. Journal of Semiconductors, 2006, In Press. Cao Z X, Xiong S Z. A New Structure for a CMOS Audio Power AMP with Extremely Low THD and Low Power Consumption[J]. Chin. J. Semicond., 2006, 27(9): 1552.Export: BibTex EndNote
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      Cao Zhengxin, Xiong Shaozhen. A New Structure for a CMOS Audio Power AMP with Extremely Low THD and Low Power Consumption[J]. Journal of Semiconductors, 2006, In Press.

      Cao Z X, Xiong S Z. A New Structure for a CMOS Audio Power AMP with Extremely Low THD and Low Power Consumption[J]. Chin. J. Semicond., 2006, 27(9): 1552.
      Export: BibTex EndNote

      A New Structure for a CMOS Audio Power AMP with Extremely Low THD and Low Power Consumption

      • Received Date: 2015-08-18
      • Accepted Date: 2006-01-16
      • Revised Date: 2006-04-29
      • Published Date: 2006-10-12

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