| Citation: |
Liu Yan, Zhao Yiqiang, Zhang Shilin, Zhao Hongliang. A low power and low distortion rail-to-rail input/output amplifier using constant current technique[J]. Journal of Semiconductors, 2011, 32(4): 045003. doi: 10.1088/1674-4926/32/4/045003
Liu Y, Zhao Y Q, Zhang S L, Zhao H L. A low power and low distortion rail-to-rail input/output amplifier using constant current technique[J]. J. Semicond., 2011, 32(4): 045003. doi: 10.1088/1674-4926/32/4/045003.
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A low power and low distortion rail-to-rail input/output amplifier using constant current technique
doi: 10.1088/1674-4926/32/4/045003
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Abstract
A rail-to-rail amplifier with constant transconductance, intended for audio processing, is presented. The constant transconductance is obtained by a constant current technique based on the input differential pairs operating in the weak inversion region. MOSFETs working in the weak inversion region have the advantages of low power and low distortion. The proposed rail-to-rail amplifier, fabricated in a standard 0.35 μm CMOS process, occupies a core die area of 75 × 183 μm2. Measured results show that the maximum power consumption is 85.37 μW with a supply voltage of 3.3 V and the total harmonic distortion level is 1.2% at 2 kHz.-
Keywords:
- amplifier
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References
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Proportional views
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