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1. |
A CMOS Differential Difference Amplifier with Reduced Nonlinearity Error of Interpolation for Interpolating ADCs
Xin Zhang; Dunshan Yu; Shimin Sheng;
Circuits and Systems, 2006. APCCAS 2006. IEEE Asia Pacific Conference on
4-7 Dec. 2006
Page(s):9
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12
Abstract:
In this paper, the nonlinearity error induced by interpolation amplifier in interpolating analog-to-digital converters (ADCs) is analyzed, and a new differential difference amplifier (DDA) with well restrained nonlinearity error is presented. Its highly steady common-mode output voltage makes it especially suitable for differential interpolating ADCs. The amplifier is designed in a 0.35mum standard CMOS process with a single 3.3V supply. Simulated results show that this amplifier achieves a steady common-mode output in a wide common-mode input range from 0.85V to 2.45V without demanding complex circuitry. The amplifier settles in 4.8ns to an accuracy of 0.01% and dissipates a total power of 398.38muW
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