Abstract
The Differential Difference Amplifier (DDA) is well-known as a novel analog building block, which has 2 differential inputs. DDA-based circuits often provide high input impedance and simple external circuitry, and therefore are competitive to op amp-based circuits. In this paper, we present a design of a CMOS rail-to-rail fully-differential DDA (FDDA) in a 2 /spl mu/ CMOS process.
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