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A high-bandwidth high-swing CMOS power amplifier for portable audio players

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2 Author(s)
Chan, P.K. ; Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore ; Tao, J.C.

A class-AB CMOS power amplifier, which embodies new error amplifiers and adopts the embedded frequency compensation in a multistage topology, is presented. The simulated result has shown that the unity gain-bandwidth is 7.3 MHz. The quiescent supply current is 1.43 mA whilst the output stage delivers maximum 40 mA into a 32 Ω // 220 pF load. The amplifier exhibits -83 dB THD at a closed-loop gain of 20 dB for 1 kHz, 2 Vpp output at a 3 V supply in a 0.6 μm CMOS technology.

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Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on  (Volume:1 )

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