Title: 120nm CMOS operational amplifier with high gain down to ±0.3V supply
Abstract: A fully differential 3-stage operational amplifier in 0.12 /spl mu/m digital CMOS technology achieving a differential gain in excess of 86 dB in a supply voltage range from /spl plusmn/0.3 V to /spl plusmn/0.6 V is presented. This operational amplifier contains only regular-VTh transistors. It uses a pseudo-cascode input differential stage and a pseudo-cascoded load for the high gain. Positive feedback is primarily implemented for a good common-mode rejection. A transit frequency of 46 MHz and a phase margin of 66/spl deg/ at a /spl plusmn/0.6 V supply and with a load of 10 pF have been measured. The current consumption is less than 1.8 mA in the temperature range from -30 to +150/spl deg/C.
Publication Year: 2004
Publication Date: 2004-01-23
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 5
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