A low power and low distortion rail-to-rail input/output amplifier using constant current technique
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 h...
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| Published in | Journal of semiconductors Vol. 32; no. 4; pp. 045003 - 1-4 |
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| Main Authors | , , , |
| Format | Journal Article |
| Language | English |
| Published |
IOP Publishing
01.04.2011
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1674-4926 |
| 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 mu m CMOS process, occupies a core die area of 75 x 183 mu m super(2). Measured results show that the maximum power consumption is 85.37 mu W with a supply voltage of 3.3 V and the total harmonic distortion level is 1.2% at 2 kHz. |
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| AbstractList | 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 mu m CMOS process, occupies a core die area of 75 x 183 mu m super(2). Measured results show that the maximum power consumption is 85.37 mu W with a supply voltage of 3.3 V and the total harmonic distortion level is 1.2% at 2 kHz. |
| Author | Liu, Yan (彦刘) Zhao, Hongliang (宏亮 赵) Zhao, Yiqiang (毅强 赵) Zhang, Shilin (世林 张) |
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| Cites_doi | 10.1109/4.340424 10.1109/JSSC.2006.891717 |
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| References | 2 Yan S (1) 2005; 3 Carrillo J M (3) 2003; 1 Farzan R (8) 2010 7 Raisanen-Ruotsalainen E (4) 2000; 2 Hogervorst R (5) 1995 Shi Guangyuan (6) 2009; 36 |
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| Snippet | A rail-to-rail amplifier with constant transconductance, intended for audio processing, is presented. The constant transconductance is obtained by a constant... |
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| StartPage | 045003 |
| SubjectTerms | Amplifiers Distortion Harmonic distortion Inversions MOSFETs Semiconductors Transconductance Voltage |
| Title | A low power and low distortion rail-to-rail input/output amplifier using constant current technique |
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