Switched-Capacitor Multiply-By-Two Amplifier Insensitive to Component Mismatches

This brief describes a new mismatch-insensitive amplifier with an accurate gain of two and with the parasitic effects compensated. It is based on associating four sets of two capacitors in series during the amplification phase. The amplifier operates within a single clock cycle and uses only one amplifier. A detailed study of the different nonideal effects is presented. Simulated results demonstrate that a gain accuracy enhancement of the order of 4–5 bits can be achieved with respect to conventional realizations.